MXPA03010764A

MXPA03010764A - Communication system.

Info

Publication number: MXPA03010764A
Application number: MXPA03010764A
Authority: MX
Inventors: Mitsuaki Oshima
Original assignee: Panasonic Corp
Priority date: 1993-03-25
Filing date: 2003-11-25
Publication date: 2009-01-14
Also published as: JP3588463B2; JP3410085B2; JP3248807B2; KR0161051B1; MY113937A; JP2002190842A; AU660123B2; JP2007049723A; JP2003158501A; JP2002198928A; MXPA00004076A; JP3327915B2; CA2119983A1; MXPA00004081A; JP2004343789A; JPH07322219A; JP3327916B2; JP3450321B2; CA2119983C; MXPA00007354A

Abstract

At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and second, data streams. The signal points are divided into signal point groups to which data of the first data stream are assigned. Also, data of the second data stream are assigned to the signal points of each signal point group. A difference in the transmission error rate between first and second data streams is developed by shifting the signal points to other positions in the space diagram expressed at least in the polar coordinate system. At the receiver side, the first and/or second data streams can be reconstructed from a received signal.; In TV broadcast service, a TV signal is divided by a transmitter into, low and high, frequency band components which are designated as a first and a second data streams respectively. Upon receiving the TV signal, a receiver can reproduce only the low frequency band component or both the low and high frequency band components, depending on its capability. Furthermore, a communication system based on an OFDM system is utilized for data transmission of a plurality of pubchannels, wherein the subchannels are differentiated by changing the length of a guardtime slot or a carrier wave interval of a symbol transmission time slot, or changing the transmission electric power of the carrier.

Description

TITLE BE THE DE LA Campo System The present invention refers to a system for the transmission and reception of a digital signal by means of the modulation of its carrier wave and that of the signal. Description of the art The signal systems have been in various techniques for the transmission of digital video signals have improved these is a method of transmission of digital serials of Until the systems transmission of digital signals of television are used particularly for between stations Soon they will be used for satellite terrestrial broadcasting service all countries of the HDTV television broadcast systems of the facsimile pulse-modulated music and other information services being requested to increase the desired quantity information and necessary to satisfy millions of viewers have to be increased by a bandwidth frequency assigned to the service of dissemination of data to be trans smitidos are always abundant and provided and handled more advanced techniques would be ideal to modify or the current system for ta transmission that corresponds to the increase in the amount of data that occurs with television broadcast is public business and can not advance to have as many interests And it is essential that any new service can be appreciated with receivers and screens More is desired the compatibility of a system can the old services or a new service that can be intercepted by current receivers and the It is understood that for a television system With digital diffusion, it can be adapted for the extension of data that can respond to future demands and the advantages as well as compatible actions for current receivers to receive. The capacity of expansion and compatible functioning of digital systems will be explained. of art television A digital television system by satellite in which the television or National Committee standards of compressed to approximately Mbps are transmitted by time division modulation of 4 and transmit in 4 to 20 channels that HDTV signals are transported in a different HDTV digital system is provided which of HDTV video compressed enough 15 Mbps are transmitted a signal of 16 or 32 QA by means of stations known system of satellite allows that the HDTV signals are transported in a ca in a band of frequencies equivalent to same channels of signals This that the channels The corresponding NTSC signals are not available during the transmission of the signal of not taking into account compatibility with NTSC and HDTV receivers or screens, and it completely passes through the data expansion capacity that it needs to adapt to an advanced This common terrestrial system of HDTV offers HDTV service on conventional 16 or 32 QAM signals without any In any analog service Broadcasting creates enough shadow regions of signal attenuation within the service area due to obstacles inconvenience or signal interference caused by a station When television is in shape it can intercept more less in these regions of signal attenuation although reproduced image is low If the television signal is in a form rarely can be reproduced at an acceptable level within the disadvantage is hostile to the development of any system of LA The present invention has the object to solve the aforementioned disadvantages by a communication system disposed of Such a way as to allow compatible use of the current NTSC broadcasting services to which it introduces the services particularly by and also to keep the shadow or signal regions in the service area of the communication system according to the present invention to a minimum. which are placed at intervals In order to carry out reception and transmission of If applied to a signal the communication system two sections a transmitter having an input circuit of a modulator circuit to produce numbers of points in a vector field by modulation of a plurality of out-of-phase conveying waves that an input signal supplied per circuit and a transmitter circuit for transmitting the modulated signal and a receiver with an input circuit for receiving a demodulator circuit to demodulate the points of the 1 of a conveyor wave and a circuit of the input signal that a data first of ny data flow that feeds the transmitter modulator circuit where it produces modified QAM carrier wave representing points on a The signal points m are divided into point groups of the signal na ios the n of the first data stream Also data of the second stream is assign the signal points not subgroups of each group of points the resulting transmission signal is transmitted from the In form, a third flow of the p-circuit of the first transmission of transmission signal data can be propagated by demoding the signal points p in a signal space diagram in groups of signal points. The second data stream is measured by the assignment of pyna values to the pyn signal points of each group of corresponding points to reconstruct the second flow of the receiver in P the n point groups are collected and assigned n values for and reconstruction of the first receiving the same signal from the one receiver equipped with a large antenna and capable of modulating large amounts of data can produce the first and second receiver stream equipped with a small and modular small data can reproduce only the Por's first flow is guaranteed transmission system compatibility When the first data stream is a TSC signal or a low-band component of an HDTV and the second data in a high-frequency band component of the signal from the modulation receiver of small amounts of data can reconstruct the NTSC television signal and the large data modulation receiver can reconstruct the signal from As a simultaneous digital broadcasting service of NTSC and HDTV it will be possible using the system and the invention of the invention. More communication system than a transmitter that has an input circuit of a modulator circuit to produce points in a vector field of signals by means of modulating a plurality of carrier waves using an input signal supplied in a transmitting circuit transmitting the modulated signal in which the main procedure includes receiving an input signal containing a first data stream giving n values and a second of dividing the signal points of the signal into groups of points by assigning the n values of the prime r data flow to groups of signal points assigning data from the second data stream to the signal points of each group of da points and transmitting the modulated signal and a receiver has an input circuit to receive the signal a demodulator to demodulate ios points of p signal p of a carrier wave and an output circuit in which the main procedure includes the division of the p points into points of the first data stream from which the n values assign to the signal point groups and demodulating The second data stream of which the pyn values are assigned by the pyn signal points of each group of points of a transmitter 1 produces a QAM signal of the second data streams and each transporting to the applicable signal point groups with a modulator The signal can be intercepted and the first data only by a first receiver from both the first the second data stream a second receiver and all the the second and third r receiver Page 5 Plus a receiver with data capacity of n bits can reproduce the bits n modulated conveyor belt of tritiums transporting data of m where m allowing that the communication has compatibility and capacity for extensions Also postbfe a transmission of signals of the change gives of so that point of nearest to the point of the coordinates t Q are to a source space where f the distance from the nearest point of each axis and n is more than a digital satellite service for the NTSC systems is possible and when the first data carries a signal NTSC and the second data stream transport a differential signal between NTSC and So that ability to correspond to an increase in the amount of data to be transmitted may be in the service area will be increased as well as zones of signal attenuation DESCRIPTION BE THE DRAWINGS Figure 1 is a schematic view of the entire transmission system arrangement where the first embodiment of the present is shown. The figure is a block diagram of a first-order transmitter. Figure 3 is a vector diagram showing a transmission signal of the first. Figure 4 is a vector diagram showing a first-hand transmit signal. which shows the binary codes to the signal points according to the first 6 Figure 6 is visió that the assignment of the binary codes to groups of points according to Figure 7 a view showing the allocation of binar codes os a bs signal points each group points signal according to Figure 8 is a view showing another assignment of binary codes to groups of signal points and signal points according to the first Figure 9 in one showing threshold values of groups gives points of signal according to ta The figure is a vector diagram gives the modified signal from 16 Qat the first Figure 11 is a graph showing the relationship between the radio the antenna and ia of transmission energy n segu n the first FIG. 12 is a view showing the signal points to the modified signal of 64 QAM the first FIG. 13 is a graphic diagram showing the relationship between antenna radius and the energy ratio of according to FIG. 14 a diagram vector than those of signal points and their signal points of 64 QAM modified signal of the first Figure 15 is an explanatory view showing the explanation between and of the signal 64 QAM the first Figure 16 a graph showing the relationship between antenna radius and the proportion of transmission energy according to the first Figure 17 is block diagram of a digital transmitter of ia Page 7 Figure 18 is a diagram of ia for a modulated 4 PSK of the first Figure block diagram of the First receiver gives first Figure 20 is a diagram of space of the signal for a modulated signal of 4 FSK of the first Figure 21 is a block diagram of a second receiver of Figure 22 is diagram vec 16 QAM Modified Aerial View of the First Figure 23 is a vector diagram of a modified QAM signal of the first Figure a fluiogram showing the action of the first Figure 25 and are the vector diagrams showing a signal of 8 and 16 the first Figure 26 is a block diagram of the third receiver of the first Figure 27 is a view showing points of modified signal of 64 QAM of the first Figure 28 is a f showing another of the first Figure is a schematic view of the entire arrangement of the transmission system showing one embodiment of the present Figure is a block diagram of a first video encoder of the third 8 figure 31 is a block of a first video encoder ta third Figure 32 is a block diagram of a second video coder of third figure 33 is a block diagram of a third video coder of third Figure 34 is an explanatory view showing the third video coder in time ds the signals and according to La 35 is an explanatory view shows another time signals and according to the third figure 36 an explanatory view showing more in the time of the signals and according to third faith figure 37 is a schematic view of the entire arrangement of the signal transmission system shows fourth of the present Figure 38 a vector diagram the modified one of The figure is a vector diagram of the signal of t6 QAM according to the third Figure 40 is a vector of a modified signal of 64 QAM according to the third Figure 41 is an allocation diagram of s data components in a time base according to the third Figure 42 a diagram of data component assignment with a time base in multiple by distribution in the according to the third 9 Figure 43 block diagram of a carrier circuit product of the third The figure diagram showing the principle of the third ta carrier Figure 45a diagram of a reproducing carrier circuit for inverse modulation the third Figure The diagram shows an assignment of the points of the third signal. FIG. 47 is a diagram showing an assignment of the signal points of the third. FIG. 48 is a block diagram of the carrier circuit for multiplying by the The third figure shows an explanatory view showing the successive transmission of the signals and according to the third figure SO is an explanatory view shows the successive transmission of signals and in multiple by distribution the according to the third Figure 51 a view showing another successive transmission the signals DV and in according to third Figure 52 is a diagram showing a region of signal interference in a transmission method according to the fourth Figure 53 is a diagram showing regions of signals in a transmission method of a fourth multiple page figure 54 a diagram showing regions of signal attenuation in the fourth transmission method Figure 55 a diagram To the slates of attenuation of serials in a method of transmission of multiple level according to fourth Figure 56 is a diagram showing a region of signal interference between two television digitals according to the fourth Figure 57 diagram showing an allocation of points Signal of a modified 4-ASK signal of the fifth Figure 58 is a diagram showing another assignment of signal points of the modified signal 4 ASK of the fifth Figure 59 and are diagrams showing the assignments of signal points of the fifth the modified signal of 4 ASK of fifth Figure 60 a diagram shows another assignment of the modified signal of 4 ASK of the fifth embodiment when regime of The figure shows a lateral transmitter of 4 and 8 levels according to the fifth embodiment of figure 62 is a wave diagram of the signal by one of multiple before fifth of ta. Figure 62 is a graph of frequency distribution of one rial VS8 in the fifth embodiment of ta Figure 63 is a block diagram of receiver of and 16 levels of the fifth page of the diagram in a video signal transmitter of the fifth block diagram of a television receiver of the fifth block diagram from another 5-level television receiver of a receiver to a 6-level VSB map the fifth and sixth realizations of a VSB constellation of 8 levels in fifth and sixth embodiments a time-waveform diagram of the VSB signal in the block diagram of video encoder of the fifth diagram of a video encoder containing a divider circuit of the block diagram of a fifth encoder a block diagram of an encoder containing a circuit diagram that the allocation of time the data components according to the fifth ss a block diagram of a video encoder of the fifth page The diagram is mapping time for data components according to the fifth Figure 75 is a diagram showing the allocation of time of data of a transmission signal according to the figure The figure is a diagram showing time allocation for data components a transmission according to the fifth Figure 77 is a diagram showing a time allocation for the data components of signal data transmission according to the fifth Figure 78 is a block diagram of a video encoder of the fifth Figure 79 is a diagram that the time allocation for the data components of transmission serial three reveals according to the fifth embodiment The figure is a diagram in block of another video encoder of Fig. 81 is a diagram showing a time allocation for the data components for a fifth-order transmission. The is a block diagram of a video encoder for the fifth embodiment. Fig. 83 is a graph that shows the relationship between and time of a fifth-frequency modulated signal Figure 84 is a block diagram of an magnetic recording time and fifth reproduction The figure is a graph showing the relationship between a and the level according to the second Page 13 Figure 86 is a graph showing the relationship between and the transmission distance according to the second faith The figure is a diagram in of a transmission of the second Figure 88 diagram in Moque of a receiver The figure is a graph shows the relationship between and error ratio The figure 90 is a diagram that the regions of signal attenuation in the transmission of three levels do Figure 91 is a diagram showing the regions of signal attenuation in the four levels of sixth ta Figure 92 is one showing the transmission of four levels of sixth The 93 is a block diagram of a sixth divfeor Figure 94 is a block diagram of a mixer of Figure 95 is a diagram showing another of four levels of the sixth Figure 86 is a view of the serial propagation of a well-known system of digital diffusion The figure a view of the propagation of signals of a digital television broadcasting system the sixth Figure 98 is one that shows a four-level the sixth The figure is a vector diagram of Ja gives 16 S QAM third page 14 Figure 100 is a vector diagram of 32 the third The figure is a graph The relationship between and the proportion of errors according to the third figure 102 is a graph showing the relationship between and the error according to the third Figure 103 is a graph shows the relationship between the displacement and the ratio necessary for transmission according to third Figure 104 is a graph showing displacement distance n and the ratio between the required for the third According to the figure 105 is a graph showing the relationship between signal level and the distance of the transmitting antenna a terrestrial broadcasting service according to the third The figure is a diagram showing one of service a signal of 32 gives the third The figure is one that shows a service area of a 32 SRQAM signal of the third The figure is a diagram showing the frequency distribution profile of a television signal The figure is a diagram that shows the frequency distribution profile of a conventional two-way television. The figure is a diagram showing the threshold values of the third. Figure 108 is a diagram showing the frequency distribution profile of two-layered carriers of the ninth page. 108 is a diagram that shows the threshold values three layers of the ninth The figure is a diagram showing television assignment of the third Figure 110 is a showing a uftjplex principle of division by code of the third figure 111 tub view showing a code assignment according to third The view is showing the assignment of a QAM extended according to third The figure is a view showing a a frequency assignment of a modulation according to the fifth The figure is a diagram block showing a recording and reproduction apparatus according to the fifth Figure 115 is a block diagram showing one of an octave portable telephone The figure is a block diagram showing base stations according to the octave Figure 117 is a view illustrating the capacity of communication and distribution of traffic a system Figure 1 is a view that illustrates the capacity of communication and distribution of traffic according to the octave The figure is that it shows the allocation segments of time in a system Page The figure is a diagram that It shows the allocation of segments according to the figure The figure is one that the allocation of system time segments of the figure is a diagram showing a time segment assignment according to one of the eighth ta a block diagram showing a a nwei according to fa Figure 122 is a block diagram showing a two-octave. The 123 is a block diagram showing one of according to the ninth figure is a view illustrating the principle of the system according to the ninth The figure is a view showing the assignment of frequencies of a modulation signal in a system Figure is a view showing a frequency assignment of a modulation signal ta ninth The figure 126 is a view showing the allocation frequencies of an unweighted one of the ninth embodiment. The figure is a view that the assignment of an OFDM signal of the ninth embodiment where two channels of the two-level OFDM are weighted with electrical energy of Pagina ta figura 126 is a view showing fa allocation of frequencies of an OFDM signal of the ninth embodiment where the intervals are doubled The figure is a view showing assignment of frequencies of a signal of the ninth those of the carrier no The figure is an en bloc that shows according to figure ninth figure 128 is block diagram an encoder in the and the figure is a block diagram of a c grating odometer in embodiments 4 and Fig. 128 a block diagram of a grating encoder the embodiments and Fig. 128 is a block diagram of the grating encoder in the embodiments and Fig. 12S a block diagram of a grating encoder in the the embodiments and Figure 128 is a block diagram of an encoder in grid the embodiments and the figure is a view showing an allocation of effective symbol periods and guard intervals according to the ninth Figure 130 graph showing the relationship between the regime and the proportion of emirs according to the ninth page 18 The figure is a block diagram that shows magnetic recording and reproduction device according to the fifth The figure is a view showing the recording format of the track on magnetic tape and the path of the The figure is a block diagram that shows a according to Ja third The figure a diagram that the allocation frequencies of a The figure is that it shows the relac The area of service and quality of the image system gives transmission signals after levels the third Figure 136 a diagram shows the assignment of frequencies if the transmission system of according to third is combined with Figure 137 is a diagram in A block diagram shows a recaptor transmitter according to the ninth part of the band of low frequency signals. Figure 139 is a diagram showing an allocation of Signal points of the APS signal the first Figure 140 is a diagram showing the assignment of signal points of the signal of the Figure 141 is a diagram showing an assignment of the signal points of the first page 29 Figure 142 a diagram showing an assignment of points gives signal of the signal PS type of faith first figure 143 a graphic diagram showing the relationship between the antenna radius to satellite and the capacity of transmission according to the first Figure 144 is a diagram block that shows a transmitter-receiver loaded with OFDM according to ninth The figure is a diagram showing the waveform of guard time and of the multi-level OFDM the ninth where the multiple path is the 145 a diagram that shows the wave of time gives save and time symbol in multi-level OFDM according to the ninth where the multiple path Figure 146 is a diagram showing a multi-level OFDM principle according to the ninth Figure 147 is a diagram showing the allocation of those of a system of signals of two weighted electric according to the ninth The figure is a diagram shows the between D and the delay time of the multiple trajectory and the ninth guard time Figure 149 is a diagram showing the time segments the respective layers according to the ninth Figure 149 is a diagram showing distribution of the guard times of the respective ones according to the ninth page. The figure is a sample diagram The distribution of the respective layers according to the ninth La 150 diagram shows the relation between the time delay of the multiple path and the transfer rate according to the ninth embodiment where the effective transmission of three-layered signal to the trajectory is performed. Figure 1S1 is a diagram showing the relationship between the delay time of the multiple path and the ratio according to the ninth embodiment where a type and layer diffusion service can be obtained by the combination of and the figure of a television signal Hierarchical of tiers in time segment when the one of the ninth embodiment with Figure 153 shows the relationship between the delay time of the signal of the relationship and the transmission rate when the ninth embodiment is combined with and used to describe the of hierarchical diffusion using a matrix structure Figure 154 is graph of frequency distribution d the figure shown in the ninth shows the time axis position in a hierarchical television signal of three levels in each time segment when the guard time of the ninth embodiment is combined with the figure is a block diagram of the transmitter and the receiver in the fourth and fifth of 21 Figure 157 is a block diagram of the transmitter and the receiver the fifth and fifth embodiments of the Figure 4 is block diagram of the transmitter and receiver the fourth and fifth embodiments 1a Figure 159 a diagram of position of the signal points a VSB of levels in fifth embodiment of ta Figure 1S9 is a position diagram 8 of the signal points a VSB levels in the fifth embodiment of Figure 159 is a diagram of 4 of the signal in a VSB of levels in fifth embodiment of the La is a diagram of position of the signal points in a VSB of 16 levels in fifth embodiment of the Figure 160 is a block diagram of a The ECC encoder and the sixth of the Figure 160 a diagram of an ECC encoder in the fifth and sixth embodiments of the La 161 is a block diagram of a VSB receiver in the fifth embodiment of the Figure 162 is en bloc gives a receiver in the fifth embodiment of the Figure 163 is a graph of the proportion of errors and ta relationship curve in a VSB of 4 and a level VSB in the fourth of te Figure 164 is a curve of the proportion of errors of subchannel 1 and subchannel 2 in a VSB of 4 levels and a VSB of level TC8 in the fourth embodiment of page 22 Figure 165 is a block diagram of Reed ta fourth and fifth embodiments of the Figure 165 a diagram in block of the Beed Sotomon encoder in Ja fifth and sixth embodiments of Fig. 166 is a circulation diagram of Reed Solomon error correction and operation in fourth and fifth embodiments of La 167 a block diagram in ta and of the figure It is a cu adro of intercalating and for the fourth and realizations of the figure 166 shows interleaving faith in fourth and fifth embodiments of FIG. 169 is a comparison of redundancy in the VSB of 4 VSB of and the VSB of 16 levels in the fifth embodiment of the figure is a block diagram of television receiver to receive the signal high priority of fourth and fifth faith e Fig. 171 is a block diagram of the receiver and transmitter in the fourth and fifth embodiments of the figure a block diagram transmitter and receiver in fourth and fifth embodiments of the figure is a diagram block of an AS magnetic apparatus for recording and reproducing according to the sixth embodiment of the page 23 DESCRIPTION OF THE EMBODIMENTS Embodiment 1 An embodiment of the invention with reference to the drawings In the preferred embodiment invention both of the apparatus of which comprises a transmitter for transmitting a Serial HDTV signal and a receiver to receive ia as the recording and playback device records the HDTV signal or other digital signal at e magnetic tape other means of recording and reproducing or reading the signal recorded in said It must that the operation and principle of the modulator and the decoder decoder encoder of and to the encoder and decoder the coding of images of the HDTV signal are common to the transmission apparatuses and recording devices and essentially use the same To describe more succinctly each block diagrams for the recording apparatus transmission apparatus and are mentioned in each of the configuration of each embodiment of the invention can be achieved by means of of any method of digital value modulation by AS and PS placement of points in a constellation for the embodiments of the present invention are described using only one method of FIG. 1 shows all of the arrangement of the signal transmission system according to the first embodiment of present A transmitter 1 comprises an input unit a divider circuit a modulator 4 and a transmitter unit In each input signal m divide by a divider circuit 3 in three a first data stream of second data a third of data which are then modulated by the i 24 modulator A previously transmitted The modulated signal is transmitted from the antenna 6 via the link 7 to a satellite 10 is intercepted by the antenna uplink and amplified by a 12 previously transmitted from the downlink 13 The signal then through links descending and 41 to a first receiver a second 33 and a third In the first receiver ta signal through the antenna 22 through input 24 a where only its first stream while the third and third data is not before being retransmitted from the output unit In the form of a receiver 33, it allows the first data streams and the signal signal intercepted by the antenna 32 and fed by the input unit to be demodulated by the demodulator 35 and go summed by adder 37 to a single data stream which is then transmitted further from the output unit. The third receiver 43 allows the second and third data streams of the signal intercepted by the antenna 42 and fed by the input unit 44 to be demodulated by the demodulator and then summed by the adder 47 to a data stream that Game continues to transmit from the output unit As the three discrete receivers 33 and 43 have their respective demodulators of different characteristics in such a way that the outputs demodulated by The signal of the same frequency band transmitter 1 contain data of different More different but compatible data can be transported in determined signal of the frequency band to their receivers For each one of the 3 digital signals HDTV and Super divide high and super components of high frequency band represent the first flow of the second and the By the 3 television signals dis Inks can be transmitted carrier with frequency band of a channel Page 25 for simultaneous playback of a television image of resolution and super In the television signal NTSC is intercepted by a receiver accompanied by small for data demodulation of little the HDTV is intercepted by a receiver accompanied by a medium antenna for quantity data and the super HDTV signal is intercepted by receiver accompanied by large antenna for data demodulation of greater is illustrated in the figure a television or a digital serial television NTSC containing only the first stream for the digital broadcast service NTSC it is fed to a digital transmitter where it is received by an input unit 52 and modulated by a demodulator 54 before it continues to be transmitted by the demodulated signal transmitting unit then it is sent from the antenna 56 through the uplink 57 which in turn transmits by the downlink to the first receiver 23 in the first receiver 23 desrnodula with its demodulator the digital modulated signal supplied by the digital transmitter 51 to the original signal of the flow of the same digital signal modulated can be intercepted and demodulated by the second receiver the third 42 first flow data of the television signal In the three discrete receivers 33 and 43 can intercept and process a digital signal of the existing television to be The layout of the signal transmission system will be described in more Figure 2 is a block diagram of the transmitter in which the input signal is fed through the unit input 2 and divided by divider circuit 3 into 3 digital signals containing a one-second flow and an assumption that the input signal is a signal of its low-frequency band component is assigned to the first stream of the component of afta frequency is assigned to the second frequency flux and component of the super high frequency band is assigned to the flux of the 3 frequency bands a different from that of the modulator e in the modulator Here a circuit 67 modulation and the signal point or changes the positions of the points of the signal according to a given signal The modulator 4 is arranged so that it modulates in 2 carriers out of phase in SO which are then added to a QAM signal. More signal signal from the input to the modulator 61 is fed to the first AM 62 and to a second a carrier wave produced by a generator of the carrier 64 is fed directly to the first modulator of 62 and also to a of phase where a second AM modulator is transmitted in phase to a form of before transmitted AM The two modulated amplitude signals of the second AM modulators 62 and added by the adder 65 to a transmission signal which is then transferred to the unit Transmitter 5 to obtain a The procedure is well known and will not be explained Now it will describe the QAM signal in a common constellation of β 8 or 16 referring to the first quadrant of a spatial diagram in the figure The modulator signal 4 is expressed by a summing vector of two vectors 81 and Acos2refct and represents the two bearers offset in 90a When the point of a summing vector from the zero point represents a signal point the signal of 16 QAM has 16 points of determined by means of a combination of 4 amplitude values and four values of vertical amplitude 03 and first quadrant in figure 3 contains four signal points in en in yi is a sum vector of a vector and a vector by is expressed Page 27 Now assume that the distance between 0 and the orthogonal of Figure 3 is between and between Gy is and between and is illustrated the figure fos 16 signal points are distributed in the each point represents a four-bit to allow the transmission of four data bits per period or segment Figure 5 illustrates a common allocation of two-bit configurations to points of distance between two adjacent signal points. by the receiver with enough For you want to place the points of the signal at intervals If two particular signal points are distributed close to one of the rarely can be distinguished and the proportion of Por is preferred to have points of the signal placed at intervals as shown in the figure which the 16 is defined by Ei Transmitter 1 of the embodiment is arranged so as to divide a digital signal into a first data stream of one second and a 16 points of groups of signal points are divided into four four two-bit configurations of the first data set. assign to the four groups of signal points as in the figure when the configuration of two data stream bits is selected one of the four signal points first group of signal points in first depending on the content of the second data stream for when a signal point of the second group of points of second quadrant is selected and when a signal point of the third group 93 of signal points in the third block is transmitted and when a point of the fourth group of signal points 94 is transmitted in the fourth 4 two-bit configurations in the second signal data stream of or 16 4-bit configurations in the second data stream of a Page OA 4 assign to the four points signals or signal points of each of the groups of signal points and figure dabs be understood that the assignment is symmetric between two of any of the allocation of Eos signal points to the four groups 93 and It determines by priority the data of two of the first data flow of two tritios of the data flow and data of two tritios of the second flow transmitted in the first of data will be demodulated the use of a common receiver of 4 PSK having certain sensitivity of the sensitivity of the is modified from the 16 QA receiver of the present invention intercepts and the first data stream and the second with the same Figure 8 shows an example of the assignment of the first and s Second data stream in two configurations When the low frequency component of an HDTV video signal is assigned first data stream and the high frequency component is assigned to the second stream the 4 PSK receiver can produce image from the first stream of data and that of 16 or 64 states produce an HDTV image of a composite signal of the first and flows of As the points of ta are distributed at intervals, a threshold distance between the axes of the coordinates and If the threshold distance is to be intercepted success a PSK with an amplitude amplitude has to be increased to a triple value or transmission of a QAM signal of 16 while maintaining threshold distance of the energy that it is needed for the signal of 16 QAM is nine times greater than that needed to transmit the signal of 4 when 4 PSK is transmitted in a mode of 16 energy expenditure will be elev and the reproduction of a carrier signal Above the energy available for Ea satellite is not abundant but strictly limited use By not implementing any signal transmission system that consumes a lot of energy is enough energy available for transmission by Se It expects a large number of 4 PSKs to be introduced in the market to which the digital television broadcast will enter. After the 4 PSK receivers are introduced, there is a probability that more sensitive models will be changed because the difference in the characteristic of signals the two old ones and those are enough Not to abandon the transmission of the signals of 4 In this the new system urgently needs to transmit the data of signal points of a signal of almost 4 PSK in the mode of 16 using less than the energy limited of a satellite will degrade the entire system of the present invention resides in a provision of levels of multiple signals in which the four groups of signal points and 94 are placed at a greater distance between as shown in the figure to reduce the power consumption needed for the 16 QAM modulation of those of almost 4 To clear the relationship between the reception sensitivity of the signal and that of the digital transmitter layout 51 The first receiver 23 will be described in more detail with reference to FIG. 1. Both the digital transmitter 51 and the first receiver 23 are formed of known types for data transmission or signal transmission in the service of. As shown in FIG. The digital transmitter figure is a transmitter of 4 PSK equivalent QAM transmitter of multiple that is shown in figure modulation capacity of an input signal is fed through input unit a modulator 54 where it is divided by a modulator input Page 30 121 between two The two then transfer to a 122-phase two-phase modulator circuit 122 a base carrier and a second 123 modulator circuit. for the phase modulation of a carrier that is phase-shifted with the carrier of two outputs of the first and second two-modulator circuits 122 and summed by the adder 65 for a composite modulated signal is still transmitted from the transmitting unit The resulting signal is the figure diagram of the figure knows that the four signal points are placed at a distance to obtain a use of the figure. The figure illustrates an example where the four points of the 127 and 128 represent four configurations of two 01 00 and 10 respectively. for the transfer with data from the digital transmitter 51 to the first receiver the 4 PSK of the digital transmitter 51 has an amplitude of not less than one level More when minimum amplitude of the 4 PSK signal needed for the transmission from the digital transmitter 51 to the first receiver 23 mode 4 or the distance between 0 and in the figure is first receiver 23 can successfully intercept any signal of 4 that has an amplitude of more than? receiver 23 is arranged so as to receive on its small antenna 22 a desired one or 4 PSK that is transmitted from transmitter 1 or from digital transmitter via satellite transponder and is demodulated with the More the first receiver 23 is designed primarily for the interception of a digital television signal or communication of data of the mode 4 PSK or 2 Figure 9 is a block diagram of the first receiver which the input signal received by the antenna 22 from the satellite is fed by the input unit 24 to a carrier carrier circuit 131 where the carrier wave is already a despiazadorde Pagina 31 132 where a carrier wave two phased components are detected by a first phase detector circuit and a second and transferred to a first discrimination circuit demodulation 136 and a second circuit Two components demodulated their respective circuits of and that have been individually discriminated in units of segme The synchronizing signals of a wave extractor circuit are fed to the reproducing unit of the first data stream 232 where they are added to the first signal of Ja delivered as an output in the output one. The first receiver input 23 will now be further explained with reference to the figure vector diagram The 4 PSK signal received by the first receiver 23 of the digital transmitter 51 is ideally shaped without transmission distortion or using the four signal points 153 and illustrated in the figure the four real points of the signal appear in certain large areas around the ideal positions of the signal and due to the distortion of and the phase error developed during the signal If a signal point is displaced unfavorably from its position it will hardly be distinguished from the signal point increasing thus The proportion of As the proportion of errors increases to one level the reproduction of data becomes less To permit r 5a data playback a an acceptable level of the ratio of the distance between two points must be sufficiently separate so that they can be distinguished If the distance at 1 et signal point of a 4 PSK signal at almost the critical error level has to remain in a first zone Discriminator 1S5 indicated by the striped part of Figure 20 and determined by and allows the signal transmission system to reproduce waves by demodulating a signal When the minimum radio of the antenna 22 is placed on the transmission signal of more than a given level it can be intercepted by any receiver Page 32 of The amplitude a signal 4 PSK of the digital transmitter 51 is at the minimum amplitude ARO a signal of 4 PSK to be received by the first receiver is determined equal to As the first receiver can intercept and demodulate signal from 4 PSK of the digitel transmitter 51 to the maximum acceptable level of the error ratio the radius of 22 is of signal of is of the modified QA of or 64 the pri The receiver 23 may find difficulty in reproducing its wave. For the points of the signal are increased 8 which are distributed at angles as in Figure 25, its carrier wave will be reproduced by one of the points of the signal assigned to the signal. 1 places in angles of nre S as in figure 25 the carrier of the mode of almost 4 PSK QAM can be reproduced with the carrier bearer circuit that is modified to carry out the frequency multiplication by the signal points in the Transmitter 1 must be arranged so that they can meet Here, it is considered a case of receiving a signal similar to the way in which the modulation circuit 67 acts and change the point of the transmitter shown in the figure. It is also possible to modulate the positions of the transmitter. the points of the QPSK signal shown in Fig. 18 of o In the unit of signal points in the first receiver 23 demodulates the signal of modulated pastelon position The desmodul The signal of 16 PSK transmitter 1 will now be explained by reference to the figure vector diagram When the horizontal vector distance of the signal point is greater than the minimum amplitude of the 4 PSK signal of the digital transmitter 5 cough four points signal 85 and in the first quadrant of the S remain in the shaded areas 87 or first that the signal can receive 4 When receiving by the receiver Page 33 four of the signal appear in first of the vector in the figure any signal points and of the figure can be translated into 161 of the signal in Figure 20 by the first receiver 23 of which the configuration of 2 of 11 is assigned to a segment of the configuration 2 bits of 11 is identical to the first group of signal points 91 or the first signal data flow of the transmitter the first data stream will be reproduced in or fourth As the first receiver reproduces data of 2 bits of the data flow of the plurality d e the data flows in a signal of or states transmitted from the second and third T data sujos are contained in four segments of the group 91 of signal points by affecting the demodulation of the first one without affecting the carrier wave reproduction and that described more If the satellite provides power, the previous GAM transmission technique from 16 to 64 states will be without the satellite transponder in any existing satellite transmission system is strictly due to its compact size and the capacity of the batteries. transponder and satellite is increased in size by in the cost of launching it will be This disadvantage will rarely be eliminated by traditional techniques unless the cost of launching a be reduced In system a common communications satellite provides a low power supply as 20W and a transmission satellite of a For transmission of such a PSK signal in the modali symmetric state of 16 states as the figure illustrates the minimum distance of points of Necessary signal is the amplitude of 16 QAM expressed by the energy required for this purpose is nine times greater than necessary for the transmission of a common signal of 4 PSK to enable satellite Page 34 34 can provide the power to pemutlr that small antenna the receiver of 4 PSK intercept a signal transmitted from on the existing system are needed for proper transmission of signal and unrealistic with respect to its It should be understood that the symmetric state of QAM is the most effective when receivers equipped with antennas of the size They use the corresponding energy of another technique without it would be preferred to be used with receivers equipped with different antennas. While the 4 PSK signal can be intercepted by a low cost common receiver system having an antenna the QAM signal has to be received by a high-cost multi-modulator receiver system with an antenna or large designed to provide services extremely by shows of a certain person who invests more allows the signals of 4 PSK and 16 if so with a DMA of are simultaneously with the help of small increase in energy By the transmitting energy can be kept low when the points of the signal are placed in as shown in The amplitude for the transmission of data of 4 PSK is expressed by an equivalent vector the square ratz of By the signal of 16 QAM can be transmitted to an amplitude twice greater and a transmission energy four times greater than that required for 4 A modified 16 QAM according to the present invention will not be demodulated by a common receiver designed for a symmetric QAM signal point and Sin can be demodulated with the second symmetric receiver 33 and Sin can be demodulated with the second receiver 33 with two thresholds and are predetermined to the values figure the minimum distance between two signal points in the first segment of The group of signal points 91 is and is set in comparison with that of 4 as the distance becomes that the receiving sensitivity of the has to be two times greater than the same error rate and ces greater than the level of the having a value four times greater than the radius of the antenna 32 of the second receiver 33 has to be twice the radius r of the antenna 22 of the first receiver thus satisfying the antenna 32 of the second receiver 33 has a diameter of 60 when the antenna 22 first receiver 23 is 30 this second data representing the high component of an HDTV will be transported a signal channel and demodulated with As the second receiver 33 intercepts the second data stream a data signal plus its owner can enjoy a high return of the For the second receiver of a high price can be As previously determined the minimum energy for the transmission of data of 4 ta ratio n16 of energy transmission Now it was 16 APSK to transmitting energy of 4 PSK will be calculated to the antenna radius of the second receiver using a relationship between and shown in the figure in which is the minimum energy for data transmission As distance from the point of suitable serial for modified intercept of 16 QAM the distance to the signal point for interception of 4 PSK is and ta between the distance of the signal point is the radius of the antenna is determined as shown in the figure in which the curve represents the transmitting and radio power ratio of the antenna 22 of the second receiver Fagina 36 point 102 indicates that common QAM transmission to the state of the equidistant signal state where transmitting energy nine times greater and therefore would not be As apparent by the graph in In FIG. 1, the antenna radius of the second receiver 23 can not be further reduced by increasing the number of more than five. The satellite energy is limited to low and preferably Retention remains of no more than the times as shown by the figures. Within dashed zone 103 indicates why the antenna of a value twice is equivalent to a value of four times the energy. In addition to the point that the transmission energy must be doubled when the approximately one-half times these values are all within range of n 6 that is not greater than five times the value is expressed with and of the following If the distance between two segments of groups of signal points shown in the figure are and the maximum amplitude y are proportional to y by that of a modified transmission of 64 ASPK will be described since the third receiver 43 can perform 64 QAM Figure 12 is a vector diagram in which each of the group of signal points compared to the four signal points of the figure The first segment of the group of Signal points in Figure 12 have a 4x4 matrix of the signal points placed at intervals including the point To provide compatibility with 4 PS the ra The receiver of the third receiver 43 is and the transmitter energy can be expressed by signal 64 is also shown in which the allocation of signal points in figure second receiver 33 only demodulates the bit configurations Per it is desired for there to be compatibility between the second receiver 33 is capable of a modulated form of d between the three discrete receivers can be by a levels of the points as illustrated in the figure The description to the first quadrant in which the first group of points configuration of two first streams gives its segment 181 in segment 91 of the group of configuration points 11 of two faphii of the second stream of Equally a third and fourth 184 are assigned and 10 of the same assignment is identical to that shown in figure points of the third data signal will now explain by making vector grass of figure 15 that shows the first How are signal points and represent the configuration two points of Signal 210 and 214 represent signal points and Signal Points 2 and 216 represent By configurations of two of the third data stream can be transmitted first and second streams In other two bit data s different be transmitted the present invention allows no only the data transmission of 6 data two four bits and six of different Page 38 with their respective receivers while the compatibility of the signals between the res remains will describe the placement of the signals to provide compatibility between three As shown in the figure to allow the first receiver 23 to receive the first It is necessary to place two separate signal points at such a distance that the signal ones of the per and second data stream shown in Figure 15 can be distinguished 91 from the signal shown in FIG. 15 shows that they are a distance from the distance between the two signal points 201 and 202 in the first subsegment is the energy The transmitter is needed to intercept the signal with the third receiver 43 is calculated Yes the radio of the antenna 32 is and the necessary transmitter energy is times the transmitting energy of 4 the expression This relationship is also denoted in the curve of the figure. transmitter is 6 or nine times greater than that needed for the 4 PSK at point 223 the antenna 32 with a radius of 8 or 6 times it can intercept the first of the second and third to demodulate As the distance of the signal point of the The second flow of data is close to the relationship between and is expressed by the antenna 32 of the second receiver has to be increased a little in radius as indicated by the curve Page 39 As long as the and the data flow is transmitted by means of a traditional satellite provides a small transmit power of the third data stream can also be transmitted via future satellite that provides a higher signal transmission power to interrupt the The first and second receiver or no need to be guaranteed The signal receiving action of the second receiver 33 will be described In comparison with the first receiver 23 arranged for interception with a small radio antenna and that of the modulated signal of 4 PSK of the digital transmitter 51 or the first data of the signal of the transmitter the second receiver is adopted to perfectly demodulate those of two state of 16 signals shown figure the second data flow of the 16 QAM of the transmitter In the data of 4 including also data flow can be ta relationship between and without is different in two The two different data sets load in a demodulation controller 231 second receiver 33 shown in the figure which in turn supplies threshold values is respective to the demodulator circuit for block diagram of the recaptor 33 in the 21 is similar in the basic construction to that of the first receiver 23 shown in the figure The difference lies in that the radio the antenna is greater than the antenna radius It allows the receiver 33 to identify a component of the signal comprising a smaller distance from the point of the demodulator 35 of the second receiver 33 also contains a reproducing unit 233 of the data stream and from the demodulation controller in addition. For the AM demodulation of the modified 16 signals, as each charger is a four bipios signal with two positive and around values As it is apparent from the vector diagram the figure threshold values vary depending on the energy or the transmitter since the transmit signal the embodiment is a signal 16 the reference threshold is determined by the following as shown in figure various data for including and Ag and the value for modulation of multiple items are also transmitted from the transmitter 1 is transported in the first flow of D can be available to recover this data demodulation through the statistical process of rese a of the serial A way of determining the displacement factor will describe with reference the figure A change of the displacement factor causes a change in the threshold value the increase of a difference in the value of fixed on the receiving side of a value of fixed in the transmitting side will increase the proportion of Referring to the figure the demodulated signal of the reproducing unit of the second data stream can be to the demodulation controller 231 to change displacement factor in the sense that it increases the proportion of For this the third receiver 43 can demodulate the displacement factor so that circuit can the transmitter may not transmit the displacement factor that can increase the capacity of this technique can also be applied to the second receiver Figures 25a and 2b are views that illustrate the distributions of the points of the the signal points where the points are when moving them in the direction of the polar coordinate described above is characterized in which points of the signal move in the direction of the coordinate is in one direction is called rectangular coordinates by ot to the one characterized by the displacement of signal points in Page the direction of the coordinate is in one sense it is called the coordinate system The figure shows distribution of signals where the four points of se when moving each of the four signals QPSK in the direction of the r of the coordinate system of this polar coordinate system that has 8 points of The signal is obtained from the QPSK as shown in the figure. As it moves in the polar coordinate system add signal points in this is called the pole APSK is in shape In this ef value of fas coordinates of the four signals QPSK Newly added 85 is specified using the displacement factor as shown in the figure, the signal points include the ordinary d signal points of QPSK and a signal point obtained by moving point of. the signal 83 in the direction of the radius r an amount of one of a fai is obtained in addition to the sub-channel 1 of two bits identical with the one as shown in the constellation of Ea figure eight new points represented by the S coordinates can be added to the move the eight signal points and the direction of this allows two of you get a subchannel of a channel and calls the subchannel provides 1 of 2 subchannel 2 of 1 an As you place points of the signal in the lines allows the receiver ordinary QPSK explained with reference to the figure reproduces the carrier wave demodulate the first sub-channel of 2 although the second sub-channel can be As described the method of moving the points of the signal in the sense of polar coordinate is useful in the capacity of transmitting data while ensuring compatibility with the PS especially receiver or receiver for current broadcast service by accordingly without losing the first generation of of the satellite service based on the broadcast service will advance a second generation atapa in which APSK will be used to increase the amount of transmissible information by using multiple level modulation while maintaining the figure signal points are distributed with these points of the signal 16 PSK are reduced and limited to 12 points is three points in each With this limitation these signal points in each quadrant consider a signal point for signals of 4 this allows the The GPSK receiver reproduces the first one in the same way in the most points of the signal are placed in the lines of y 6 In others the added signals move a number plus T in the angular direction of the polar coordinates from the GPSK signals placed in the lines of d all the signals are in range of 4 can be considered of the signal points GPSK of the line of Although the proportion of errors low a little in this the receiver shown in figure can discriminate these as four placed signal points can reproduce data of two In the case of angular displacement the signal points are placed in lines of the carrier circuit of the carrier wave can reproduce the carrier wave by use of a multiplier circuit n in the same way as other If the points of the signal are not placed on the lines of the carrier wave, it can be reproduced by transmitting various data of the carrier within a period the same as was done in the other Asuminedo an angle between two signal points of or is in the polar coordinate system and a first angular displacement is two points Page 43 of signal and are obtained by moving the point of the QPSK angular sense 6 a number of times the number is multiplied by two As the 3 of 1 bit can be added and denominated from If you add another eight signal points when moving the signals in the direction of of the radius r a possible quantity as shown by the figure The tino and two can be reproduced by two having the same phase between Returning to the figure as the one based on the polar coordinate system can be applied to PS as shown in figure this It will be adopted for the first satellite service. Even if it is adopted for the second generation satellite diffusion based on A this polar coordinate system is lower in that those in the same group can not be placed in uniform spaces as in This figure is similar to that shown in Figure 25b with the systems of co-ordinated rectanguiars and, as the signal points are placed in the angular lines of the can be demodulated by the to 2a are divided into the receiver QPSK can be used for Even as points are distributed the signal piara adapt to the coordinate system the s e carried out by the Como the compatibility between the coordinates rectanguiars and the polar system can be guaranteed in any of 16 PSK and the demodulation 231 has a memory to store in it the different threshold values the factors of the number of points of the rules correspond to the different transmission channels per page 44 If the data is lost, the demodulation of the second data flow will be difficult. This will be explained in reference to the flow chart shown in the figure. Even if demodulation data are not demodulation of 4 PSK in the step and of the first data in the step can be In the step the recovered demodulation data the reproducing unit 232 of the first data is transferred to the controller 231 of If faith 4 or 2 in step eJ 231 of triggers the 4 PSK or 2 PSK in step If the procedure follows step A two threshold TQ and a value for demodulation are calculated in the step n step 306 is supplied for the controller of the first circuit 13S and second discrimination circuit 137 and by the demodulation the modified signal of and the reproduction of the second data stream can be effected in the 307 and In the step the error ratio is examine and if the procedure returns to step to repeat the demodulation of 4 As shown in the figure the signal points 85 and are aligned on a line at an angle while 84 and 86 are off the line. Carrier wave data that transmits the second data from the reproducing unit of the second data stream to a reproducing unit of the carrier is performed so that carrier has to be extracted from signal points and transmitter 1 is arranged for the timing signals of the carrier at intervals of given the data primar with that of compensating for the lack of demodulation of the second flow The signal of the carrier allows the to 45 identification of the signal points 83 and the first flow of no matter the demodulation flow so the reproduction of the carrier wave can be triggered by the data transmission of the reproductive circuit carrier. is 16 or not according to such modified reception of QAM as shown in the figure In the also it examines to see if m is more than 64 or If it is determined in the step that received signal does not have one of signal points the procedure follows aso The distance of signal points THs4 from that of 64 QAM is This calculation is equivalent to that of, but the resulting distance between points of the signal is If the distance of the points of the signal in the first sub segment 1 is the distance between the first sub segment 181 and the second segment is expressed by average distance is I se When it is less than representing the discriminating capacity of signal points of the second receiver will be distinguish any If this is outside the scope, the procedure returns to step 313 for the demodulation of the 4 PS. If it is within the procedure, it proceeds to step 305 to allow the demodulation of QAM. step 308 is determined what proportion of errors too much the procedure returns step 313 for the demodulation of mode 4 when transmitter 1 supplies a modified S QAM signal as shown in the figure in which all the points of the signal are at angles of n the carrier waves of the signal are lengthened to the same phase and thus with A two-bit data from the first data stream the 4 PSK receiver is demodulated while the second data stream data demodulate second 33 and the total of three bits may be third receiver 43 will be described in more Figure 26 shows a block diagram of third receiver 43 similar to that of the second receiver 33 in the figure difference is that a breeding unit 234 of the third data stream is added and the discrimination and reproduction circuit has the ability to identify the data of the receiving antenna 42 has a greater radius than that of allowing minor state signals for QAM signals of 32 or that the demodulation of a serial 64 of the first circuit 136 It has to identify eight digital levels of the detected signal in which seven threshold levels participate. As one of the threshold values is the first quadrant contains Figure 27 shows a space diagram of the signal in which the first quadrant contains threshold values As shown in the figure the three normalized threshold values are expressed and By means of the phase signal detected using three values the third data can be reproduced the first and second flow of data explained with figure 2 third flow of data by four signal points Page 47 203 and 204 the first in figure 23 which represents values of the configuration of two Por b se The numbers or modified QAM signals may be the value of the values in the first data stream demodulated in the reproducing unit 232 of the first data stream and the three threshold values are calculated and then fed to the first circuit 136 and the second circuit 137 of and playback of the handle that the signal of 64 QAM is demodulated with the data having the modified signal of QAM can be demodulated only by a specific receiver or The 28 is one that shows the action of demodulation for modified signals of difference between the fiujgram for the 16 QAM shown in Fig. 24 will be the continuation from step 304 to step 320 where m the demodulation of the 32 QAM signals is executed in the step if the step 321 where it is examined if 64 Silo A3 If step A3 is less than a value, the procedure follows 305 and the same sequence as in the figure was implemented. If step 323 is jumped, A3 is not the value that the procedure follows step 324 where the values are calculated In the step the calculated threshold vafars are fed to the first and second discrimination and reproduction circuits and in the step the modified signal of 64 second and third data flows is performed in the step In the step is examined if the proportion of errors is the procedure follows step 305 where the demodulation of 16 QAM is repeated and if it is low the demodulation is continued 64 The action of carrier wave reproduction necessary to execute a demodulation procedure will be described The scope of the present invention includes the data reproduction page, a modified serial of 16 or 64 QA with the use of a 4 receiver receiver with a frequency of 4 PSK rarely reconstructs the waves so that it can not execute. e the transmitting side and Two techniques for compensation provides according to the present The technique to the transmission of the points of the signal to A second technique offers transfusion of the points of the signal arranged at intervals of an angle of eight. According to the first cough eight points of signals including 83 and align angles of 4 and is shown in figure In by one of the eight signal points are during periods of synchronization the time segments 454 and 4S5 arranged equal intervals a space 451 of the time segment shown in the figure of the figure All the desired points are transmitted during the other segments of the transmitter one it is also arranged so as to allocate data for a range of time slots to the data region of a data block as shown in the figure. The contents of one of will be explained in reference to the figure. time that the synchronized 4S4 and 465 represents a unit of data flow block 491 transporting data of The segments synchronized in the signal are arranged at interval s equal of a given time per interval time segment or synchronization When the arrangement of synchronized segments in the reproduction of the carrier waves will be executed segment by segment by means of the extraction of the synchronized data from their time segments Page 49 The synchronized data S contained in a synchronized block accompanied in the front of a dizziness of data which consists of a number of synchronized segments indicated by the stripes in the figure. By increasing the data to be extracted for the reproduction of the wave allowing the 4 PSK receiver to reproduce the desired carrier waves with accuracy and block. synchronized comprises the synchronized data regions containing synchronized data and S3 including singular words and region data synchronized signal allocation is accompanied at the end of the synchronized block and which data including information on the disposition of and allocation of the segments The data of the signal point in synchronized phase has a particular phase and can be reproduced by the receiver of 4 By the region of synchronized phase signal assignment can be recovered without ensuring thus reproduction of the carrier waves in As shown in the figure the synchronized 493 is followed by a block data 501 of data that contains the data on the threshold scores necessary for the demodulation of the signal These data are for a given signal of multiple objects and may be contained in the region that is part of the tuned block 493 for further recovery Figure 42 assignment of the signal data for synchronization tees transmission through the method The assignment is distinguished from that shown in Figure 41 by the fact that a guard period 521 is placed between any of the adjacent blocks 491 of data being Page 60 491 for faith interruption of the transmission the each data block accompanied on the front side of a region s In this way, the data block is synchronized. During the synchronization phase signal points are only By reproduction of the carrier wave the 4 PS receiver will be feasible More the synchronized signal and the carrier waves can be reproduced by the method The reproduction of the carrier of the first receiver 23 shown in Figure 1S will be explained in more detail with reference to Figures 43 and As shown in the figure a signal is fed through the unit 24 to a synchronization detector circuit where it detects a demodulated serial. of the synchronization detector 541 is transferred to an output circuit 542 for reproduction of the first data stream of the data region 499 of synchronized phase signal assignment in the figure is retrieved with an extractor controller circuit so that that of Jas synchronized data signals can be recognized and transferred as a phase control pulse 561 synchronized In FIG. 44, a reproduction circuit 544 of the de-modulated signal of the synchronization detector circuit is fed to a frequency multiplying circuit where it is multiplied 4 before being transmitted to the controller 544 of the reproduction of the signal. 562 in figure 44 contains true phase data and others 564 of the figure 452 synchronized phase time segments which convey the data of also contain at intervals are illustrated. In circuit 544 the reproduction controller of signal 562 is shown by the control pulse 561 of the phase synchronization to produce a phase sample signal 555 which is then converted through the action of retaining the sample to a phase signal The phase signal of the carrier reproduction controller circuit 544 it feeds through the S46 filter of the loop to a page its wave is reproduced The reproduced carrier then sends to circuit 541 d etector of this dalos of the point of the signal of the phase indicated das dashed the figure 39 and are used so that a correct carrier wave can be reproduced by a frequency multiplication by 4 or Although a plurality of phases are reproduced to the absolute carrier phases success can be identified with that of a singular word assigned to region 496 of shown in For the transmission of a modified signal as shown in the figure, the signal points on the 471 and phase signals indicated by the dashes are assigned to the synchronized segments. Its carrier can be hardly reproduced with a common receiver of 4 PSK. but successfully with the first receiver of the mode 4 PSK provided with the carrier circuit of the carrier The previous carrier circuit of the carrier is of the type A carrier reproducer circuit of the reverse modulation type will be explained according to the figure 45 a carrier-reproducing circuit of the inverse modulation type according to present in which received signal is fed nta of the unit 24 input to a synchronization detector circuit 541 to produce a signal the input signal is delayed by a first delay circuit to a signal of the delay signal then a phase modulation quadrature circuit 592 is transferred where it is demodulated conversely, the demodulated signal of the detector circuit 641 of a carrier signal is fed through a carrier reproducing controller circuit to a comparator A carrier wave produced by VCO 547 is delayed by a second delay circuit 594 to a delay signal which is also fed to the phase comparator In the phase comparator, the reverse signal 52 demodulated carrier is compared in the case of thereby producing one of the signals sent through the loop filter 546 to 547 to its carrier wave output arranged in phase with the carrier wave In the same way as the carrier circuit of the carrier COSTS shown in figure 43 a circuit 543 extract The sampling of the serial numbers contained in the striped areas of the figure can be reproduced by the carrier of a 16 or 64 QAM signal with the 4 PS demodulator of the receiver. The one of a carrier by frequency multiplication The transmitter 1 shown in FIG. 1 is arranged so that it modulates and transmits a modified 16 QAM signal with assignment of its signal points in the phase as shown in the figure. In the first receiver 23 shown in the figure, the carrier wave can reproduce with its carrier reproduction circuit COSTS containing a 661 multiplier circuit by 16 shown in the figure The signal points each phase shown in figure 46 are processed in the first quadrant of the multiplier 661 circuit by in which the carrier is reproduced by combination of a nitro da and a VCO the absolute phase can be determined from 16 phases by assigning special word to the region of the multiplier arrangement by 1 6 will be explained in reference to the figure signal and a difference signal produced from the demodulated signal an adder circuit and a suastrator circuit and then multiplied together by a multiplier 664 to an absolute signal can also be determined from the 16 phases assigning a word to the region of The arrangement of the circuit by 16 will be explained in relation figure A summing signal and difference signal are produced from the demodulated signal by means of an adder circuit and a circuit and then multiply between Page 53 yes by one to one of a 665 multiplier produces a signal of The two signals then multiply by a 666 to signal without In the form of one of the two produces without the 2B and the combination of a summer circuit a subtractor circuit and one multiplier To hear it is produced a signal of without by means of combination an adder circuit a 672 and one completes the multiplication by During previous multipl for the carrier wave of all points of the modified signal of 16 QAM shown in Figure 46 will be reproduced successfully without extracting the signal without the carrier wave reproduction of the 64 QAM signal shown in figure 47 can include an increase in error ratio due to dislocation of some signal points of The synchronization zones are two techniques for the consists of inhibiting transmission of signals from the This reduces the total amount of data transmitted but facilitates the The consists of providing the synchronized segments are described the figure points the signal in zones of phases synchronized by 471 and during the period of the group segments of the time segment This triggers an exact synchronization action during thus minimizing errors of se now the 16 allows a simple receiver of 4 to reproduce the carrier wave of a signal modified from 16 c 64 the insertion of 54 synchronized segments makes the phasic accuracy during the reproduction of the carriers of a modified 64 said the transmission system of the present invention can transmit plurality of data a single carrier wave simultaneously arranging multiple levels of the plus three different receivers that have discrete characteristics of signal interception sensitivity and capacity is provided in relation to one of which depending on the size of the data that wants to be demodulated which is proportional to the When the first quality receiver is of low resolution and low price and is acquired together with a small the owner can intercept and the first data item gives one of When the second receiver of medium resolution quality and average price is acquired Along with an antenna its owner can intercept and reproduce the first and third data receiver When the third receiver of high resolution high quality price is acquired with an antenna its owner can intercept and reproduce all coughs If the first receiver a digital satellite receiver for home use price will be greatly welcomed by a majority of The second receiver accompanied with a medium costs more and will be accepted not by ordinary viewers but private people who want the Third receiver services accompanied by an antenna for less before the output is increased is not suitable for home use and will probably be used in industries By the third data stream that transmits the HDTV signals is transmitted via satellite to subscribers cinemas They can present tapes instead of traditional films and manage the cinema under the circumstances. When the present invention applies to a signal transmission service, images of different quality transmitted in a signal wave will be transmitted and they will be compatible. Although the first embodiment of invention reiterate to one of 4 a modified of 8 a signal of 16 and a signal mo Other signals with equal being including from one of 256 an 8 PS one of 16 PSK and one of 32 It is understood that the present invention is not to be transmitted by satellite and will be employed in a terrestrial communication system or in A transmission system of the invention can also be employed in a four-eight ASK signal as shown in Figures 58 and 68a and Second Embodiment 2 of the present invention is shown in which the multi-level arrangement of the first divided into small levels by means of the in the correction capacity thus forming a logical construction d levels the first each channel of multiple levels has different levels in amplitude of the electric signal demodulator capacity second embodiment provides different levels in the realization capacity such correction of the data in a multi-level channel are divided into two and and has more capacity e correction of errors that for As the ability to detect and correct errors It differs between and can be reproduced successfully within a certain proportion of errors when the C level of an original transmission signal so that it disables the reproduction of This will be implemented using the logical arrangement of multiple More logical arrangement of multiple levels It consists of dividing data of a modulated channel of multiple levels and of discriminatory distances between the codes of 56 correction by mixing said codes with the product codes for variable capacity correction can be a signal of more levels channel is divided into two and and channel is divided These will be explained in more detail by referring to Ja 87 in the reproduced of the signal of more If the proportion of G is as it can not reproduce the three components and is being reproduced If it is less it can also be reproduced when playing and when it is reproduced, the proportion of the reproduced signals increases to The lower the reproducible signal levels, this will be explained in the form of the relationship between the transmission distance and the value of in relation to the figure the value of a received signal is reduced in proportion to the distance expressed by the line in The figure is currently assumed that the distance between the transmitting antenna and the receiving antenna is when when when when and when the transmitting antenna is larger can be reproduced as shown where the receiver is denoted with others it can be reproduced between an area can reproduce in a zone 863 when the distance is no more than In this zone that contains the area there is doubt that can In a small area can be reproduced and in faith smaller area can be reproduced if different data in a channel can be reproduced correspondingly The degrees of decline in the proportion of the logical arrangement of multiple levels of the signal transmission system in pre This invention can provide the same effect that a traditional analog transition system produces in which Page 57 the amount of which can be received gradually as the proportion of the levels will decrease. levels Figure 87 is an en bloc of a 1 that is essentially identical in construction to that shown in 2 and previously described in the first one and will not be explained in more The only difference is that the coders of the error correction code are added as abbreviated to the encoders The divider circuit 3 has four to which the four signals are distributed and a signal divided by the two signals and fed to two encoders of one 872a and one of a first ECC encoder to convert them to the forms of the correction code The main encoder ECC has a higher capacity of errors than the ECC subcoder By can be reproduced at a lower ratio than is apparent by level diagram in Figure plus the logical level of is affected less by the declination than that of the Di After coding the corrections codes of and they are summed by the adder 874a to a signal which is then transferred to the modulator The other two signals and divider circuit 3 are for error correction by two coders of a master 872b and a subcoder of a second coder of 871b and then are summed by the adder 874b to a signal that is transmitted to the main ECC modulator 872b has higher error correction capability than the ECC subcoder The modulator to its produces of the two signals and a multi-level signal that is transmitted from the transmitting unit As the output signal transmitter 1 has two and also four levels Page 58 and based on the two physical levels to provide different correction capabilities of The reception of such levels will be The is a block diagram of a second receiver 33 which is almost in its construction to that shown in Figure 21 and which is described in the first second receiver 33 arranged to intercept signals from multiple levels of the transmitter 1 shown in the figure comprising the first encoder of 876a and one second the which is the one of or of any of PSK and thus the figure was shown a receiver is demodulated by the demodulator 35 at two and that is to the two dividers 3a and where they are divided into four levels and the four signals are then transferred to the first of ECC 876a and the second 876b in which it is corrected by a main ECC decoder OR ECC sub-decoder by a main ECC decoder by an ECC sub-decoder to be sent to the adder In the adder the four signals are added to and added to a signal that is then delivered from the output unit and have a higher error correction capability than and the error ratio remains less than a value or even though it is quite low as shown in the figure by the original signal will be reproduced with the action of discriminating the error correction capability between the main ECC decoders 877a and 877b of high code gain and ECC sub-decoders 878a and 878b of low code gain are now described in more It is for there to be a difference in the correction capability of the gain of using in the ECC sub-decoder a coding technique per page or method as shown in figure 165b for the which has standard code distance and that of ECC other coding technique in which the distance between the correction codes is increased with the codes of their codes of other codes in 7 shown in the figures A variety of known techniques to increase distance error correction code have been introduced and will no longer be the present invention can be associated with any technical ica known to have the logical arrangement of is shown in the block diagram of figures and the transmitter has ainterreater avernas and the receiver has 759k and interleaving process is done half of the interleaving box shown in figure 936x deinterleaver RAM in the de-interleaver is used to decode. By this one can obtain a data transmission with high reliability with respect to the error which results in transmitted images. The logical disposition of multiples will explain in relation to the diagram in the figure that relation between and errors. after the straight line 881 represents in the relation between C and the proportion of errors and the line represents in the same to which decreases proportion of a signal of increase error rate after is that a determined the proportion of errors exceeds a reference Sh determined by the design standards of the system and no data will be educe unless the signal can not be reproduced as expressed by line of in figure When the signal exhibits a higher error rate than Et and will not be 60 When it is on point with a greater error capacity it does not have a higher error ratio high that Eth and can be A the proportion of errors of more afta that after the correction gives errors and will not be When the c in the point is increased a proportion of errors not so as and can be A ta and remain in a state After that the proportion of more is increased until the signal 02 is to be When it is increased to b at the point of the signal D2 it is no longer in the proportion of errors that Eth and can be to the ratio of errors of remains higher than and will not be When it is increased up to a higher than Eth and can be the four different signal levels divided by two levels D1 and by means of the discrimination of the corrective capacity of between them can be transmitted U using the multi-level logical arrangement of the present in company with a construction multilevel in which at least part of the signal reproduces even when the data one level more than that of the digital one will be executed successfully losing the advantageous effect of a similar signal transmission in which data transmission is gradually reduced to as the proportion of C is taken Thanks to advanced data compression techniques the compressed image data can be transmitted in a multi-level logical arrangement to allow a receiving station to reproduce an image of higher quality than can be with an analogous system and and the signal does not suddenly decline but in page 61 signal interception a zone The present invention can provide an additional effect of the multilayer arrangement that is hardly executed by a known system of digital transmission of signals without deteriorating the high quality data of the data direction of the segment data The basic data for compressing the cough data data cancellation coding in the data and afta is data the synchronization signal and the tables that are more essential expansion of the signal as by the encoder and ECO 743a gain high and and is received by the receiver high gain ECC 7SS This high priority data is protected because the error rate of the priority data does not increase The fatal deterioration of the characteristic quality of the image in the digital video transmissions is avoided from this form and an effect is obtained from where the quality of the image deteriorates The modulator 749 and the demodulator of the figures 133 and can achieve this effect of elegant degradation with the GASA of 16 levels and of 32 levels described fa VSB 4 levels and the VSB described below in the fourth and PS 8 is shown in block diagrams of the figures and a large difference in the error ratio of the data can be created. of high priority and low priority data during signal reception if a high priority data gain coding error is applied by means of the ECC encoder 744a and the grid encoder 744b at input 744 of the second stream while When the low-priority data is encoded, the low-gain correction is coded by the ECC 743a encoder. Page 62 As when the transmission system ratio deteriorates, the after-treatment data can be radiated while the quality of the data deteriorates with deterioration of low data. Those of can also be reproduced in applications subject to a serious deterioration of the proportion of C is found in the receiving conditions that occur with mobile receivers and the position information block can be they can receive and watch the programming transmitted reception conditions extremely Realization 3 A third embodiment of the present invention described with reference to the drawings Figure 29 is a schematic total view illustrates the third embodiment in the form of a digital transmission 402 of video input in a super high resolution television image is fed to 403 input unit of the first video signal encoder is divided by the divider circuit 404 into 3 and a compressor circuit 405 is transmitted to compress the data before followed by three other video input signals 07 and 403 are fed to a second video encoder by a third and a fourth all of which are arranged in a construction identical to the first video encoder 401 for compression of the four of their respective encoders 410 and the first four data streams are transferred to a first 413 of the 412 where it makes the successive transmission. from signals by a TOM process to a signal from the first data stream that feeds the All four is All data streams are transferred from their 410 encoders and to a second 414 muliiptexor where the successive transmission of signals is made to a signal of the second data stream then the transmitter a part or all four third data streams are transferred to a third muitiplexer 415 where the successive transmission of signals is made to a third signal f luxury data that is then fed to the transmitter S transmitter 1 executes the modulation of the three signals of the data streams with its modulator 4 in the same way as described in the first Modulated signals are sent from the transmitter unit by means of the antenna 6 and an uplink to a transponder 12 of the satellite 10 to its transmitting to three different including the first receiver The modulated signal transmitted by means of a link 21 is intercepted by small antenna 22 having a radius and fed to a reproducing unit 232 of the first data source in the first receiver where only the first data stream is the first data stream demodulated f It then converts a low-resolution video or low-resolution video signal 426 of the signal via the video deodorizer. In addition, the modulated signal transmitted by the downlink 31 is intercepted by the medium antenna that has a radio and feeds the playback unit. 232 of the first data stream and the second data unit of a second receiver 33 where the first and second data are first and second data streams are converted by a video second 422 to an HDTV or video signal 427 resolution of the Image to the output signals of 425 and 64. In addition, the modulated signal transmitted by downlink 41 is intercepted by a large antenna 42 which has a feed to a reproductive unit of the first stream a second reproductive unit of and 234 reproductive unit of the data stream of a third receiver 43 where its second and third streams are the second data streams and then summed and converted by a third of video 423 to a signal of super output or superfast resolution to be used in video theater or video output signals and 427 reproduced if so A common digital television signal is transmitted from a conventional S1 transmitter and when intercepted by the first receiver 23 is converted into a video output signal such as low television signal first video encoder 4Q1 will now be explained in more detail in relation to the block diagram of the figure A super high resolution video input signal it is fed through the input unit 403 divider circuit 404 where it is divided into four components per encoding process of the input video In its pass it is separated by a filter against low pass horizontal filter against low pass and a filter horizontal high pass 452 by ta modality two components of horizontal and high frequency that then half of its quantities by two its 453 and 454 component horiz The low-level filter is filtered by a 4S5 vertical vertical and a vertical high-pass filter 4S6 to a vertical component and low or signal and a horizontal and vertical low-thrust horizontal or vertical component. The two and two subsamplers 457 are transferred to the circuit. 65 T horizontal component is by a vertical filter of step bap 459 and a vertical of step 460 to horizontal high low vertical or a signal and a vertical horizontal component high or a signal HH The two and then subsample in half by yy they transfer to the compressor circuit. The signal is preferably compressed by DCT by a first compressor 471 of the compressor circuit 405 and is fed to a first outlet 472 as the first flow of the second compressor 473 and fed to a second outlet. third compressor 463 and is fed to the second output The signal is divided by a splitter 465 into two resolution and resolution video signals that are transferred to the second output 464 tert The first output video decoder 421 will now be explained detail in relation to the first data figure or the signal of the first receiver 23 is fed through an input unit 501 to a video decoder 502 first 421 where the decoded signal is expanded by a 503 to then a circuit of change of the dimensional proportion can be delivered through a 505 output unit a standard format wide letterbox format or a side format format scanning signal can be interlaced or interlaced type its mode lines can be or can doubling to 1050 by double tracking of When digital signal receiving signal 51 is a digital television of mode 4 PS mode can also be converted by the first receiver 2S and the first video decoder 421 to an image of The second video decoder 422 will be explained in more detail in relation to the block diagram of Ja The signal of one of the second receiver 33 is fed through the first input 521 to first for the data expansion and it is transferred to an envelope sampler 523 where it is a signal on by a vertical filter 524 low pass to also the receiver signal 33 through an input 530 to a divider where it is divided three components that then a third and a fourth 534 expansion of the three expanded components are transferred to a second expander in 2x by 3 over and y are filtered by a vertical filter of high pass vertical filter of low pass and a vertical filter of high pass are added the 525 adder of the vertical filter 524 low pass and VH vertical pass filter are displayed by a sampler envelope and filtered by a low pass horizontal filter 542 to low horizontal video signal VL of the vertical pass filter and filter 1 vertical step 540 are added by the adder are sampled by envelope 544 and are filtered by a horizontal filter 545 high pass to a horizontal signal The two video signals the afta and low then it s they add up by the adder 543 to a high-resolution video signal that is still transmitted through an output unit 546 as the video output 547 of by a format Yes a traditional TSC video output can be reconstructed with equal The figure 33 is a block diagram of the third video decoder 423 in which the signals are fed through a first input 521 and a second input to a high-band video decode circuit 527 where they are converted to the HD signal of the same way as described The signal is fed through a taillerator 551 to a video decoder circuit 552 a super frequency band where it is decoded and composed to VH signal HD signal of the video decoder circuit 527 with high frequency band and The video decoder circuit signal with a high-frequency band is added to a high-resolution television signal or television page that is then delivered by the output unit 554 as the super action video output of successive signal transmission in the 12 shown in Figure 29 will be explained in more detail Figure 34 illustrates data assignment in which three data luxes et second and contain a period of T six data of channel L5 and six data of channel HD V and and six data of channel H H5 and H6 In the data of ia NTSC or of L1 a are transmitted successively by process of during the Mas assign to a domain 801 for et first Then it takes data of difference 1 between HDTV and NTSC or a sum of and assign to a domain 602 for the data of difference between HDTV and super HDTV or to the figure are assigned to the domain for first The selection of the television of the first The channel described will be intercepted by the first receiver 23 with a small antenna coupled to the first video decoder of the first channel converted to a standard or wide-screen signal as shown in the figure. When intercepted for a second ptor 33 medium antenna coupled to the second video decoder the signal is converted by adding L1 from the first data stream assigned to the domain and from the second data stream assigned to domain 602 to an HDTV signal first channel equivalent in program to the signal When intercepted by a third receiver 43 with an antenna large coupled to the third video decoder the signal is to add L assigned to the assigned to the domain and D3 assigned to the domain 603 to a Super HDTV first channel equivalent in program to the signal The signals of the other channel can be reproduced from the same Page 68 Figure 35 shows another L1 data assignment of an NTSC channel to a first domain domain 601 that placed in the front first data stream also contains in front S that include the demodulation data and the described demodulation data. in the first One HDTV signal of the first channel as and that is the difference data between NTSC and HDTV are assigned the two domains 602 and Si is a component of NTSC comp The rimido of six is twice as high as 12 and the total of can be demodulated in S Mbps with the second receiver 33 and the second of video According to the current compression techniques of compressed HDTV signals can be reproduced at approximately 15 This allows the The data assignment shown in Figure 35 allows simultaneous playback of HDTV and HDTV signal in the first. Without this assignment it allows an HDTV signal to be transported in the second S21 constituting the data of the second in signal of a Super HDTV serial component in the first channel it comprises 1 and H The difference data H1 is assigned to three domains and 513 If the NTSC signal is 6 the super HDTV signal is transported to a height of When the compressed proportion is the video data of Super HDTV of sweep lines for reproduction of a size image for commercial use can be transmitted in the same way Figure 36 shows an H data assignment of a signal Super HDTV is assigned to the six domains If a compressed NTSC signal is 6 asta allocation can carry up to nine times more 54 Mbps of data From the super HDTV data of a higher image quality can be a previous assignment It uses one of two planes of the horizontal and one wave of When using planes of the horizontal and the utilization This is explained to figure 49 an assignment of data in which and one of vertical and horizontal first flow gives signal of vertical polarization and of the second group of data and and one of vertical and the third vertical polarization signal flow of the first data stream carries low or NTSC television data and the horizontal polarization signal carries high frequency band data When the first receiver 23 is equipped with a polarization antenna can reproduce only the signal of When the first receiver 23 is equipped with one for polarized horizontal waves and pu The HDTV signal can be reproduced through the sum of L1 and the first receiver 23 can be compatible between NTSC and HDTV with a particular type of Figure SO illustrates a TAKE method in which each data burst 721 is accompanied in the front synchronization data and a 731 data card and data frame synchronization data card 720 are provided in the front of the The similar channels are assigned to segments of For a first time segment 750 transports HDTV data and super HDTV In the channel The six time sections 750d and are arranged the one of each station can offer HDTV and super HOTV of the other stations by means of the selection of a particular channel of segments of the first receiver 23 can reproduce a signal of NTSC when equipped with a horizontal antenna and both the NTSC and when equipped with a Page 70 antenna On the 33 receiver can play a super HD TV in a lower resolution while the third receiver 43 can reproduce super signal According to the third has to be built a signal transmission system understands that the data allocation is not ai TVMA burst mode shown in figure 50 and another method such as successive transmission continuous signals by division of as in Figure 49 they will be used with the same. Also the data mapping shown in Figure 51 will allow an HDTV signal to be reproduced a resolution. As indicated, the compatible digital television signal transmission system expressed in the third embodiment can offer HDTV television transmission and the convenctonai a signal of intercepted by a commercial station or can be modified The QAM of the embodiments is now called SRQAM and its proportion will be calculated the proportion of errors in 16 Figure 99 shows vectorial diagram of cough points of signal 16 As it is apparent from the first the 16 points of i a of QAM including are distributed in equal intervals of The point of the serial 83a is a distance of y from the Now it is assumed that n is a displacement value of 16 In 16 the point of the 83a of the QAM moves to a point of signal 83 where the one of each axis is The value of displacement n is expressed as follows The other points of signal 84a and 86a are also shifted to two points 84 and Page 71 If the ratio of errors of the first data is obtained is obtained from The error rate is obtained from error data of 36 or 32 SRQAM. The figure is a vector diagram of a signal of 36 SRQAM at which distance two points of the signal 36 OAM is signal point 83a of a distance of Each axis of the Now assumes that n is the value of the signal point 83a is shifted to a signal point 83 where the distance of each axis is in the form of the nine points of the signal 36 in the first quadrant to the points and If a group of signal points 90 that the nine points of the is considered as a single point of the proportion of errors Pe1 in the reproduction of only the data stream modified receiver of 4 PSK the proportion of errors Pe2 in the reproduction second flow ds data after discriminating the nine points of the group signal the one from the obtain respectively Page 72 The figure shows the relationship between the error ratio Pe and the proportion in which the curve 900 represents a conventional or unmodified 32 QAM The line 905 represents a signal with error rate The curve 901a represents a level of the SRQAM signal of the present invention in the ND1 shift proportion of As the ratio of the 32 SRQAM is 5 dB lower in error ratio than that of the conventional signal of means the present invention allows a signal to be reproduced at a given error ratio when its proportion of relatively curved SG2a represents If a signal of SRQAM is reproduced at which it can be reproduced at the error rate of only when its ratio of dB is more than the faith of 32 conventional QAM of curve, curves 90 and 902b represent the signals of SRQAM and Curves 902c represent a signal of SRQAM in which it is apparent that the proportion of signal of SRQAM error ratio is S 8 dB and dB higher in y in the level and dB in the level than common signal of page 73 in figure 103 is shown proportion of first and second flows and a 32 SROA that needs for constant error rate one of displacement Coma when the displacement n is more than a difference develops between the two proportions of their respective and so that the signal of multiple or first coughs and second transmission can be executed with En is essential for data multiple signal levels of 32 SRQAM of the present Figure shows the relationship between proportion of and the proportion of errands p for the signals of 16 The curve 900 represents a signal of the curves and the level or first data flow of the signals of 16 SRQAM in y The curves are of level or signals of 16 second data flow in The proportion of the first and second data flows of a signal of 16 SRQAM is shown in figure f which is necessary to maintain a proportion of constant against a variation of the displacement is when displacement n more than the data transmission of multiple of the SRQAM will be an example of the propagation the signals of SRQAM of the present one will be deservirá now to be employed with a digital service of transmission of television the figure the relationship between the level of the signal and the distance between the transmitter antenna and a receiving antenna in the transmission service. Curve 1 represents a transmitted signal from the transmitting antenna of 1260 ft. It is assumed that the error ratio essential for the reproduction of an applicable digital television signal is from The striped section represents the interruption of point 910 represents the limit of Page 74 reception of a QAM in the distance L is 60 miles and a digital HDTV signal can be intercepted The proportion of varies in S under the worst condition such the mole If a in the condition attenuates the interception rate of An HDTV signal can hardly be the geographical conditions affecting the propagation of TES signals and one of approximately IO by 10 will be by the interception of signal successfully within TNITtas will never be guaranteed and on a digital signal will be propagated with greater than one signal It will be understood that a digital television transmission service is less than service. In the case of the SRQAM signal of the present invention or of the shown figure, a signal transmission system of three is constituted as shown in figures 133 and This allows that a low resolution NTSC signal at the MPEG level is transported in medium data television data eg from a system of The data flow service area 1 of the SRQAM signal increases to a point 70 miles while the second data stream remains within the data stream and a high frequency data component is transported in a second flow. a point of 55 miles is shown in the figure Figure 106 illustrates a computer simulation result of the service area of the signal 32 of the present which is similar to figure 53 but explains in more how the lines 703b and represent a conventional receiving area 32 a data level receiving area a data level receiving area data level receiving area and a service area of a similar television station The 32 QAM conventional ones used in this drawing are based on one revealed Page 75 For a common signal of 32 the service area with a radius of miles can be set T level of the without attenuated by geographical or climatological conditions greatly e declined in near point limit of the area of the frequency band television component of the MPEG1 degree is transported in the data of the and the medium frequency band television component of the NTSC grade in level data and the preputting of band television high-frequency HDTV in the second data the service area of the present 32-ta signal increases by miles in reception radius of an EDTV signal of a medium resolution grade and miles for the reception of a one-degree signal The figure shows a service area in the case of a displacement factor s Figure 135 shows the service area of the figure in terms of more average resolution component of a digital television transmission in the of the present invention can be successfully intercepted in an unfavorable service region it or a shadow zone where a conventional medium frequency band signal is propagated and attenuated due to Inside of at least the service area the NTSC television signal of modality can be intercepted by any television receiver As shadow zone or of attenuation of created by structures and other obstacles by a neighboring analogue or produced in a low ground is decreased to the viewers or subscribers will increase in HDTV service can be appreciated by a few viewers who can afford the high cost of a receiver and screen according to system The system of the present invention allows a traditional receiver of Page 76 PAL or intercept a medium-resolution digital HDTV with the use of a tuner Most Sos can enjoy the service a lower cost and their numbers can This will stimulate TV broadcast business and will create a social benefit other than the receiving area. signal and the average resolution or NTSC service according to the present invention is increased by a As the number of viewers in the television business is enjoying an increase in this, it reduces the risk of developing a new digital television business that will be stimulated to be placed in Figure 107 shows the area of service of a signal of 32 of the present invention which effect will be assured to Two service areas 703b signals of and can be determined in extension by the optimal propagation of varying the displacement n in consideration of a profile of the distribution of the HDTV and NTSC receivers or features By viewers can satisfy the service and a supplier station will enjoy a maximum amount This is obtained n In case the 32 SRQAM signal is the n displacement is determined if signal 16 is used is determined n 1 n 3 Page In transmission to terrestrial signal the modality in which the first and data levels are created by means of the displacement of i The serial points as indicated in the figures and the windows of the invention will be given when offset n in a signal of or 64 is more than In the high frequency and low frequency band embodiments of a video signal are transmitted as the signal. First and second flow of No signal transmitted can be a signal In this the low frequency or low resolution components of a sound signal can be transmitted the first flow of and frequency or high resolution components of the sound signal can be transmitted as the second flow of Por it is possible to receive a portion of C in sound quality and a low portion of in low quality of This can be used in a PCM transmission of portable telephone and things In this the transmission area of the distance of communication can be extended in comparison with the systems. On the other hand the third embodiment can incorporate the time division system shown in the figure. The increase in the number of A ECC 743a encoder and an ECC encoder provided in the two subscales differentiates the gains of the ECC code so that they differ between the thresholds of these two. Multilevel signal transmission can In such it is also possible to provide the ECC encoder such as the ones in and 743b for signals of 4 8 VSB and 16 as shown in the figure and to differentiate the gains of the explanation of this block diagram is essentially identical to that described later for the diagram in figure 131 showing the sixth embodiment of the present invention so it will not be described 78 Figure 131 a block diagram of the magnetic recording apparatus and and the figure a diagram of the apparatus of the converter Upstream of the transmitter and the downstream converter of the transmission apparatus can be replaced by the circuit of the registration signal of the magnetic head and the signal amplifier circuit of the head of the register magnetic apparatus and and these respective components by So of La and operation of the modulator and demodulator of the magnetic recording and reproduction apparatus are also identical to those of the apparatus so the system shown in Figure 84 is identical in construction to the transmission system shown in the figure To further simplify the configuration shown in the block diagram in figure 157 it can be or for even more simplification the block diagram of the figure can be used In simulation of the figure a difference of 5 of a code between the i and the SRQA is the system applies a division by code of the present invention to a rectangle that is a method independent of TDM or can obtain subchannel is by means of the division of the constellation code corresponding to an increase in the number of codes will cause an expansion of capacity that can not be reached by TDM or FDM while maintaining a Almost perfect compatibility with communication devices can bring excellent Although the above embodiment combines the and the also is to combine the CD and also combine the with the splitting FDM to obtain a similar modulation effect of values Such a system can be used for transmission of television and the figure shows a frequency distribution of 79 that of a 725 frequency spectrum of an analog broadcast signal per larger signal carrier of color carrier 723 and a 724 sound carrier are not so. to divide a digital broadcast two In this carrier is divided into a first carrier 726 and second carrier 727 transmit a first 720 and a second 721 can reduce the interference if they are placed first carrier 726 and the second 727 is far enough from the video carrier first signal 720 serves to transmit a television signal of low output resolution while at second signal 721 serves to transmit a high-resolution television signal at an output As the multi-level signal transmission using an FDM can be carried out without being affected by Figure 134 shows an example of a system using a of 32 As the sub-channel A has an output greater than the sub-channel a threshold value for the one threshold may be a threshold value for the or a threshold of a two-level diffusion having a threshold difference of This without a reduction of the charity of received signals occurred if the signal receiving level falls below the threshold of As the second signal having amount of is shown by the section sighted in a can not be received in such case and only faith first signal that has small amount of se By the quality of the image brought by the second level quite Without present invention solves this According to the present signal 720 is given by mode 3 2 that is obtained through the modulation so that the sub-channel A is drivided into two 1's of A and 2 of the newly added sub-channel 1's that has the threshold value plus carries a low component P Page SO The second is also given per mode of 32 and a threshold for the sub-channel is with this region in which no signal is transmitted when the signal falls below threshold 2 is reduced to a second signal part 721 a in figure As the sub-channel and the sub-channel A can the amount of transmission is not reduced so much in by playing an image of better quality even the level in the level of the threshold transmitting a normal component in a it is possible to increase the number of levels and expand faith low service area This low threshold subchannel is used to transmit important data header information information because this information carried in this low threshold subchannel can be received with so that the reception is If a subchannel is added recently in the second 721 of the same ef number The level of the transmission of the multiple levels can be increased in the case where HDTV signal has lines of a new service area equivalent to 775 lines can be provided in addition to the 525 lines and makes an increase in the area of the above embodiment divides one into more is also preferred to divide it three or explain a method of avoiding obstructions by combining As shown in the figure an analog television signal includes a portion of the horizontal return and a portion 731 of This method has a low level of the horizontal portion 732 of the line of and excites obstruction in the plane of the image during this. To the digital signal television an analog signal of the horizontal synchronized segments 733a Page 81 of the line return in horizontal 732 of the return line can be used transmitting a signal by or numerous data to an output level by possible increase the c data or the output level increase The similar effect can be expected even if the vertical synchronized segments 737 and 737a of the return line are provided in synchronization with the vertical portions 735 and 735a of the figure line shows a beginning of The sample shows a code assignment of the equivalent to a QAM 16 The figure shows a code assignment The figure shows an assignment of codes equivalent to a QAM As shown in the QAM signal and is divided into four 740c and have segments 64 and A word code of the signal of 256 QAM in the fourth level 740d is eight is divided four code words and 741d of two It is then distributed in regions of the signal point and 742d of the third and 740c levels and The sub-stations 3 and 4 of two bits are called division by code. Figure 111 shows a detailed assignment of codes of the equivalent of a QAM and Figure 1 2 shows A detailed assignment of codes of the equivalent to a 32 QAM is a method can be combined with the division or division FD to further increase the number of This method performs an innovative system Although it is explained by means of the rectangle Another system of points with and even FS if the frequency regions are considered as can be used for this action of the same 82 By the error ratio subchannel 1 of in the 1 with reference to the figure will be expressed as follows 1 d 1 erfc 1 4 V 4 The subchannel error ratio 2 is expressed in the following. For the error ratio 1 of 16 explained with reference to the figure will be expressed as follows: The error ratio of J 2 is expressed as follows: errors of the subchannel 3 is expressed as follows A Embodiment 4 fourth embodiment of the present invention will be described with reference to the drawings Figure 37 all arrangement of a system of signal transmission of the fourth ta that is arranged for terrestrial service and is similar in construction to that of the third one shown in the figure. The difference is that antenna 6 of the transmitter is by a terrestrial antenna 6a and receivers 23 and 24 are with three Page 83 terrestrial antennas and the Action system is identical to that of the third embodiment and uncle B will be explained terrestrial broadcasting service as opposed to satellite depend a lot on distance of transmitting antenna 6a and receiving antennas 32a and Yes the receiver is distant at the level of The received signal is a multi-level signal that can hardly be demodulated by it so that it does not reproduce any of the signal transmission system of the present invention allowing the first receiver 23 equipped with the antenna to be located quite a distance as it is. figure can intercept a modified signal of or 64 and the 4 PSK mode the first data stream or the component of the received signal to an NTSC video signal that the television program image resolution medium may be shown even when the level of the received signal is relatively second receiver with antenna 32a is located at an average distance from the antenna so it can intercept and demodulate the first and second data streams or the components and the modified signal of or 64 QA to a video signal from its produces program image The third receiver 43 with the antenna is located at a close distance and can intercept and the first flow from the second and third or the components and from the modified signal from or 64 QAM a super HDTV video signal to your produces a super HDTV image that has a movie quality The frequency assignment is determined in the same way as the time division multiplexer shown in the 35 and as the figure when the frequencies are first to the six component channels transports NTSC data in the first component transports HDTV data from the first and from the component transports difference data e Super HDTV of the first By the data of HDTV and Super HDTV all can be transported Page same Yes and the other channels are used as in figures 35 and 36 plus HDTV data and can be transmitted for a presentation of a Like the system allows three digital but compatible television signals that are transported in soto channel or tees and D3 of other data of medium resolution television in each channel can be intercepted in a wider service area according to the present A variety of terrestrial digital broadcasting systems that employ an HDTV signal of a bandwidth of Without those are not compatible with the existing system of have to be associated with a simultaneous broadcast technique to transmit the NTSC signals of the same program in another a common signal of 1S QAM limits the area of terrestrial service system of the present invention allows a receiver located relatively distant ede successfully intercepting the resolution medium television signal without having to use an additional device or an additional channel Figure 52 shows an interference region of the area 702 of an HDTV digital broadcast station 701 How is the service area 702 of the HDTV station 701 intersects with the service area of a neighboring analog television station In the crossover region an HDTV signal is attenuated by the interference of the signal from the analogous station and will be intercepted with less Figure 33 shows an interference region associated with multi-level signal transmission system of the present The system is of low energy utilization compared to the conventional system and its service area 703 for an HDTV propagation is smaller than the zone 702 of the system By serving area 704 for NTS or the propagation of the medium resolution television signal is greater than the convention zone. Onal The level of interference Page 85 of a digital television station signal 701 system a neighboring station 7 1 of television equivalent to ta of a conventional digital station like the one shown in the figure In the service areas of the digital station of television 70 interference regions created by ta interference from the analog station signal Both the NTSC and y signals can hardly be intercepted by the first region Even though an NTSC signal is intercepted at an equal level in the second region 708 represented by the streaks Left The NTSC signal is transported in the first data stream that can be reproduced at a relatively low proportion of and will be minimally affected when the ratio of the signal from station 71 declines. In the third region 707 indicated by the stripes descending towards the an HDTV signal can also be intercepted when the int is absent erference d ta signal while the NTSC signal can be constantly intercepted at a level The total area where the signal can be received from the system can be increased even though the service of the HDTV signals is a little smaller than that of the system in the regions of attenuation of signals produced by the interference of a neighboring television station. NTSC level signals of an HDTV program can be successfully intercepted compared to the conventional system where no HDTV program looks the same system of the present invention reduces the size of signal attenuation and when the transmission energy of the signal is increased. signal in a transmitter station or can be extended the service of the HDTV signal an equal conventional system tes signals level of NTSC of a television program can be intercepted or less to a zone of enough distance where there is no service provided by the conventional Page system or a signal interference zone caused by an adjacent television station Although the A signaling method of two will use a three-level method such as that shown in Figure 78 with Yes the HDTV signal divided into three levels of NTC and NTSC low-service area in Figure 53 increased by two at three levels where the propagation of signal faith extends radially and towards the low resolution signals of NTSC can be received at an acceptable level in the first region of interference from where NTSC signals are difficultly intercepted in two-way system. Signal interference also affects a television station to a The description continues ahota as long as there is no digital television station that causes a signal interference to any neighboring television station Therefore an innovative system under study in the unused states The existing service channels are used for HDTV because the digital signals do not interfere with the signals. For this the level of trans If a digital signal is of the conventional QA or 4 PS, its HDTV serving area 708 decreases as the 713 interfering region of the signal indicated by the signals. Stripes is quite as shown in figure This results in less viewers and making this digital system have a lot of difficulty operating a service The figure shows a similar result according to the present system How is the HDTV signal that can be received is a bit small that you equal zone of a lower resolution system or you zone 704 that can of the television signal will be increased in comparison with the system The striped represents region where the one of level NTSC of a program can be received while the one of HDTV The first region of both the HDTV signals and the NTSC signals can not be intercepted due to the interference of the station signal. The level of signals is the multi-level transmission system of the invention provides a further area of HDTV service and a higher service area of the interception of an HDTV program at a signal level of the service area of each station It is increased and more viewers can enjoy their broadcasting service. On the other hand, the television business with HDTV and NTSC compatible can operate with economic advantages. It is also intended that the transmitted signal be increased when control over the deviation of the interference of the signal to neighboring television stations which corresponds to a marked increase in the number of digital receivers of use. For the service area of the HDTV signals will be increased and in this the two regions for interception of the levels of HDTV7NTSC digital television signal and shown in figure 55 can be adjusted proportionally by varying the distance d the point of the signal in first second flow of As the first data flow carries information The distance point of the one multi-level signal can be received with the 56 illustrates the interference of the signal between two digital television stations in which neighboring station 701a provides a broadcast service compared to the station of the figure as the level of the signal is the HDTV service or the high-resolution signal in the area 703 where it can be received is increased to an area equal to the service area 702 of a television system 88 In the region crossing 714 between the two zones of service your stations the received signal can be reproduced not an HDTV level image with the use of a common antenna to signal interference but to an NTSC level image with a specific directional arbor towards the station If a signal antenna received from the target station is used can be reproduced to an image of zone 704 that can receive signals of low resolution is increased more in the service area 702 with the TV analog signal and a pair of crossover regions 715 and 716 created by the two zones 704 and 704a that can receive the low resolution signal from their respective digital stations 701 and allowing the signal received from the antenna pointed to one of two can be The HDTV service area of the multi-level signal transmission system of the present invention will be enhanced when the signal restriction is when the digital transmission service which is in the current invention also provides a The large area that can receive the HDTV signal from the conventional system allows it to transmit the signal to be reproduced at an NTSC level at a greater distance or in crossing areas where the television signals of the conventional system are difficult. signal or the shadow regions in the service area will be reduced at Embodiment 5 A fifth embodiment of the present inv is the amplitude modulation or the procedure Figure 57 illustrates the assignment of the points of the serial of an AS signal of 4 as the signal of the fifth in the four points of the signal are denoted as 723 and the Figure shows The constellation of the VSB signal of S The four-level transmission allows the transmission of data of 2 bftios each cyclic period. The four points of the 723 and 724 in 4 VSB represent configurations of 2 10 and In the Figure constellation of ASK of 4 as the VSB of 4 as Pata facilitate transmission of signals of 4 levels the two points of serial 721 and 722 are designated as a primar group 725 of signal points and cough other two 723 and 724 are designated a second group 726 points The distance between the two groups signal points 725 and 726 is determined from that between two signal points plus the distance between the two signals 722 and 723 be arranged wider than the distance L between the two adjacent points 721 and 722 or 723 are the L L the multi-level transmission of the is based on Without the realization is not limited to and L LQ will be provisionally or permanently depending on the condition requirements and In the case of have been taken constellations shown in the Figures and A two groups of signal points are assigned configurations of one of the first data stream as shown in Figure plus one bit 0 of the binary system is assigned to the first group 725 of signal and another 1 to second group of points of one of a bit of the second data stream to each of By the two signal points 721 and 723 are assigned to the two signal points 722 and 724 a Asi these are expressed by two bits by the signal transmission of The level of the present invention can be executed in an ASK with the use of the previous allocation of system points of Page 90. This invention operates in the same way as conventional points of contact. at equidistant when the noise ratio or proportion as the 3rd low proportion and not reproduce the data by the technique the system presante the reproduction of the first data flow but not the second data flow but a low state is shown in the Figure illustrating the constellation of AS of 4 The transmitted signal moves by a distribution to the reaches in the receiver due to noise and distortion of the distinction between the two sera 721 and in the case of the level switch or between and the case of the disconnector hardly In other proportion of errors in second flow data As is apparent from the Figure two signal points 721 and 722 are easily distinguished from the other two signal points 723 and the distinction between the groups of points of 726 and can be made with the first data stream will be reproduced at a ratio of errors. different and can be transmitted More so much the first the second data stream and signal transmitted by means of the multi-level transmission system can repro The figure is a block of the transmitter 741 in which an input unit 742 comprises an input 743 of the first stream of data. data and an input 744 of the second flow A carrier wave 64 of the carrier 64 has modulated by a multiplier using an input signal fed through a processor 745 of an input unit to provide an ASK signal of 4 or 8 As shown in Figure La or the ASK signal of 4 or 8 is limited by band by a bandpass 747 to the residual sideband Sida as shown in the Figure or to an ASK signal by the VSB mode that then distributes from unit The ASK signal will now be examined by the waveform. The figure shows a frequency spectrum of the ASK signal modulated in which two sidebands are provided in frequency band afforests. One of the side bands eliminates with the 74 to produce a signal as a sample in the signal. The signal is one of VSB and if the band of the frequency is to be transmitted in a frequency band of about what frequency utilization is using the transmistión of modality ta signal ASK two by symbol shown in Figure 60 can transport in same frequency band a quantity of data equal to the QAM modality of four per symbol for 4 VSB and the modality of 32 QA to five per symbol for 8 The Figure is a block diagram of a receiver 751 in which an input intercepted by terrestrial antenna 32a is transferred from an input unit 752 to a mixer 753 where it mixes with a variable oscillator signal 754 controlled by the selection to a further signal low frequency The signal of the mixer 753 then detects by detector 756 and filters by LPF 756 to a baseband signal that transfers a circuit of and that has a 4-level operator in the case of 4 and an 8-level disconnector in the case of a circuit 757 discrimination and reproduction reproduces the two flows of the first and second of the band of da and transmits more through an output The data first 758 and the second data stream will be explained. The transmission of a television signal will be explained by a transmitter and a signal from the transmitter 774 of the video signal in which a television signal by one of It is fed through an input unit 403 splitter unit 404 a first video encoder 401 where it is in four of the high and low television signal per L and This action is identical to that of the third embodiment described above in ia Figure 30 and will be more The four television signals respectively code for a technical compressor use long codes the movement compensation of the signal is made in the input unit signals are added by the 771 to two flows of and the and the component of the low frequency video signal or the signal is contained in the first data stream The two signal flows and then transfer to an input 743 of the data stream and a 744 of the second stream of a transmitter unit 741 where its amplitude is modulated and an ASK signal is added by the VSB mode propagating from a terrestrial antenna service Figure 65 is a block diagram a television receiver for such a broadcast system A digital television signal of 4 VSB or 8 VSB intercepted by a terrestrial antenna 32a a receiver is fed to an input 752 The signal is then transferred to the VSB detection and demodulation circuit 760 where a signal of a desired channel and two first and second streams are selected which are then fed an output 753 of the first data and a 759 of the second flow of the action in receiving unit 751 as similar to the one described above and it will no longer be the uncles and luxuries of and sent to the drier unit 776 in the which is divided by a splitter 777 into two one or the tablet is transferred a first input a second decoder of 422 and the other is fed to an adder 778 where it is added with before transferring it to a second input of the second video decoder The tablet then it is sent from the first 521 and a primar 523 where it expands to the original length which is then transferred to a video mixer and a 779 circuit to change the 93 dimensional proportion When the input teixiston signal represents one of NTSC's When the signal is a video signal with a resolution by which the signal level of the input television signal is an HDTV signal and an NTSC signal is converted from the screen If the proportion of an available presentation is da is distributed directly through an output unit as an output 426 of Si representation has a dimensional proportion of it traveling through the circuit 7 79 of rate change distributed by the output unit 730 a video output 425 format T second data stream fed from the second data stream to the adder summation of the splitter 777 is added to a sum signal which is then fed to the second input 531 of the second video is added to the sum is further transferred to a divider circuit 531 while it is divided into three compressed forms three compressed signals then fed to a second expander a third and a quarter to convert by expansion to and long original The signals are added with HLVL and the video mixer to a composite of HDTV that feeds through the output of the second video output unit. By HDTV signal delivery from 780 output unit as an HDTV video signal The unit of the output 780 is arranged so that it can detect a proportion of errors in the second data stream the output 759 of the second data stream by means of the proportion detector. n errors and yes a condition in which errare rate is high continues for a time of low resolution data are systematically produced for a time Page 94 Per transmission of multi-level signals for the transmission and reception of digital television signals The television signal station is both the first data and the second one of a received signal can reproduce success for a quality image. If the transmitting station is very much the first data stream can be reproduced to which it converts to a television image. low For any television program will be intercepted in a more extended and displayed area an image quality comprised from the level of a Figure 66 is a bopped diagram showing another receiver arrangement of As the receiving unit 751 contains only one output 768 first data stream the second data stream processing of HDTV data is not necessary for way that can be reduced fa construction It is advisable to have the first 421 shown in the figure as a video of the level of T receiver will be manufactured at much less cost without it having the ability to receive any signal from the HDTV level and will be greatly accepted in the receiver can be used as a tuner adapter for the interception of a digital television signal without any television system including its When a 4-level or 8-level encoded VSS is received as shown in the figure signal of canceling coding transmitted with VSB signal by the comparator decoder of numbers with the number stored in the number register in the decoder Only when the numbers transmitted and stored are equal is it specifically allowed? The television receiver 781 may have another arrangement shown in the figure which serves as a satellite broadcast receiver for the desudation of the PSK signals and a terrestrial broadcast receiver page for the signals of a PSK signal received by a satellite antenna. satellite 786 is mixed by a signal from the oscillator 787 to a low frequency signal which is then fed through the input unit 34 to a similar mixer 753 which shows a low frequency figure of the PSK mode a die The satellite is transferred to a modulator 35 by two data streams and is reproduced from it and sent through the splitter to a second video d 422 where a video signal is then delivered from an output unit to a digital terrestrial or digital television signal. Analogously intercepted by a terrestrial antenna 32a is fed through input unit 752 to mixer 753 where a desired channel selects in the same manner as described in the figure and a low baseband signal is detected The signal is sent directly to the digital form signal then feeds the 7S7 circuit from where two data streams are reproduced and converted by the video 422 a video signal that is then distributed A satellite analog TV signal is transferred to a video 788 where it is modulated to an analog video signal which is then distributed to the output unit Like the 753 mixer of the television receiver 781 shown in Figure 67 is placed in a compatible manner between the two satellite services and a receiver circuit including a detect 755 and an LPF 756 for modulation of a analog signal can be used compatible with an ASK digital signal from the server television The main part of the arrangement shown in figure 67 is the use of reducing the construction of According to ta a 4-level ASK signal is divided into two Speakers of and for the execution of multi-level signal transmission in the modality of a 3-level ASK serial is shown in figure 68 illustrating that of or the VSB signal of 8 can in a three-level arrangement and mode of a and thus giving in total three bits per in figure 68 the first coding is made of the one assigned to the points of y 722a and 723a and and 724a and each or small group represents one of two levels using a second coding of The next bit is assigned to two groups of signal points and 723 and two half groups representing one of two levels using third bit coding is made of the next one assigns two large groups of signal points 725 than a two-tier configuration using a plus this is the equivalent form in which each of the four points of se at 72 23 and 724 shown in figure 57 are divided into two as data of three different as it is understood of each of the The 8 signal points are assigned with data of three if the left side and the right side define logic 0 and logic the bit data for the signal point 722 will be This can be explained from the following As the signal point is on the left side of the two large groups 725 and the logic ú is also given to the point 722a is on the right side of two middle groups 721 and that the 1 da point of the signal 722a is on the left of the two small groups 722a and d so logic 0 is given a In the form of three bits for signal 723, the signal of three such as that of is identical to that described in the third and fourth embodiments and will not be explained further. The effects of television broadcasting using the VSB shown in the figure and are described to 97 While transmitting quantity is aphtha with the VSB of 8 it also has a higher error rate than the VSB of 4 levels and the ds value Without the high quality HDTV transmissions gives the available transmission capacity allows the application more For correction of this way reducing the proportion of This band capacity allows television broadcasts levels and other new features ei The relative effects of the VSB of 8 and 16 levels are On the station The terrestrial frequency used by the MTSC frequency band or transmission rate effectively limits to approximately S MHz by the 6 MHz frequency limit of the format per shown in the figure. With the VSB of 4 the effective amount of data transmission is 5. MHz x 4 20 Mbps because the efficiency of frequency utilization of 4 bits A minimum of 15 Mbps is required without a digital one no additional capacity with VSB of 4 Ja redundancy used for error correction is only at 20 Effective transmission amount as shown in the comparison chart of the figure With VSS of 8t effective amount of data transmission is 5MHz x 6Mbps S-bit frequency utilization efficiency While 15Mbps to 18Mbps are required for the transmission of the HDTV digital signal as described when using the VSB modulation of 8 current ia the transmission can be used for error correction coding as shown In the figure it is shown by the ratio curves gives errors of error 805 and in the figure the proportion of errors relative to the same value of in the transmission is less with the VSB of 8 levels of TCM than with the VSB of levels even though Error correction medium code gain is greater with 8-level VSB than with 4 because much more coding can be added for error correction with the 8-level VSB during the transmission of the terrestrial 98 ht speed digital signals using the band 6 As the VSB ds levels with gain aita code for the error correction coding it also has the purpose of allowing a larger service area for terrestrial HDTV transmissions than the VSB of 4 allows although the correction circuits of necessary errors with an 8-level VSB does increase the complexity of the circuits, the scale of the circuit in the receiver is much more than that of the receivers employing a modula ion that contains a component because VSB and AS are modulation methods. As a level VSB circuit board containing the error correction circuit is smaller than a QAM equivalent board with 32 levels and the same capacity of a digital receiver. HDTV with a suitable scale of the circuit and a broadcast service area with large ground station can with a VSB of 6 Note that 744a and the grid coder 744b in the block diagram of the transmitter and receiver of Figure 84 for present the figures and 157 for embodiment and figure 144 for exemplifying the specific correction method of and the VSB modulator 749 of and levels described in relation to figure 61 is used for the VSB 760 described in relation to figure 63. used in the receiver to produce the digital reception data by means of the S 757 disconnector and 16 signal levels of y 16 After error correction by middle of the grid and the decoder described below with reference to figure 84 for the present and figures 13 and for the embodiment a digital HDTV signal is generated by the image decoder of the image decoder 402, the digital HDT signal is produced Page 99 As shown in the figure and described below in the sixth encoder ECC 744a uses a Solamon 744j and a 744 encoder and uses a Reed 753j decoder for the ECC decoder. Applying the interleaving as described in the previous embodiment improves the noise resistance in the system as the code gain can be increased. further and reducing the error ratio if used in grid as shown in The figure and grid encoder 744b with a ratio of and a decoder 759b as shown in figure 172 are the appropriate ones with an 8 level VSB due to the coding of tritiums and the amount of data compressed in this The embodiments have been described using mainly the digital television signal of Although an ideal broadcast format can be achieved with a multiple image compression circuit, the circuits become more complex because they are not preferable due to the cost involved in starting new services. with a television circuit can be achieved with a serial signal interval of L or a range in the signals of 4 and 8 levels and a television transmission that is not multiple and by simplifying the circuit shown in the figure is shown in When the format is in use it will be possible to change the VSB hierarchical format of 8 The VSB of 4 and 3 have been described above and the 16 and 32 levels are described below in relation to the figure to the figure shows the constellation of VSB of 16 is shown in the figure the signal between the two points of faith signal is grouped eight groups that are treated as eight signal points and can be treated as signals of VSB of 8 levels to allow a transmission of multiple levels in 100 two e In this transmission multiple levels can be achieved with multtpiexton by division time even when transmitting a VSB signal of levels in shape The maximum proportion of data with this method is In the figure the data is still grouped into four groups 723a which can be treated as signals VSB 4 adding one more level to a While the data relays with transmission of times division of signals of 4 the transmission of multiple levels is possible with multi-level VSB transmission in Con can achieve a multi-level transmission in which VSB data or 4 levels are played back when the VSB data rate is given by doubling signal points of the VSB format of Levels as in the figure enable VSB transmission of 32 When the VSB capacity of 16 is increased this method will maintain its compatibility with the it allows obtaining a data capacity of 6 In summarizing what could be achieved the VSB receiver shown in the block diagram in figure 161 and transmitter shown in the block diagram of the figure While VSB of 4 and 8 levels is used in the form of the VSB of 16 levels as shown in the figure can also be used to With VSB of 16 can be used for the Con Sv of 16 can use a transmission capacity 40 with a band of 6 in the broadcast From the station As the serial data rate for V is 15 to 18 using the Standard there is an excess of reservation in the capacity of As shown redundancy or redundancy by too much digital pair HOTV of one and the circuits simply more complexes are made with little additional advantage over the VSB of 8 the VSB 16 redundancy levels is only the same as the VSB redundancy of 4 a day by HDTV from the two VSB 16 ground station stations. service is reduced because sufficient correction coding can not be applied of errors with two and 16 As described you can not apply enough error correction VSB of 4 levels redundancy 10 and the service area As you can see from the figure can be achieved coding for the correction of errors with a VSB of levels because the Rg redundancy A large area of service can also be obtained without In the arrangement of the video encoder 41 of the third embodiment shown in the figure is substituted with one of which the block diagram is the figure The operation of the modified arrangement is similar and will not be explained in Two signal dividers of 404 are provided and can be filters of the form a divider unit The divider unit can also be placed more simply as shown in the block diagram of the figure in which signal passes twice through of a signal splitter circuit in split mode More than one HDTV or Super video signal from the 403 input unit is compressed in base time by a compressor of 795 and is fed to the divider circuit 404 where it is divided into four components H and and a first that four switches 7 765c remain in position 1 and are transmitted to a compressor circuit while being through from 1 of switch 765c to the time compressor of A four switches and 765c are moved to position 2 and all four components of divider circuit 404 are simultaneously transferred to the compressor circuit by divider unit 736 of figure 70 arranged for the page processing of an input signal can be constructed in a simpler circuit. On the side such video described in the third embodiment shown in the figure is needed for the transmission of three levels of a signal of provides a third video 423 containing two S56 and 556a different processing capacity as shown in the block diagram of the figure on the third of v ideo 423 can be modified so that the same action is executed with a single mixer 556 shown in the figure In the first five switches and in the position So? and feed from a first one second a third 522b and a quarter by means of their switches to mixer 556 where they are mixed with a single signal of The video signal representing a video signal of resolution input returns through terminal 1 from the 765d switch to the switch terminal At the second time the four switches and 765o are in the position The video signal that they represent and they are transferred to the mixer 556 where they are mixed with a single video signal that is then sent through the terminal 2 of the switch and then the output unit for more In this mode of processing the time division of one of two are replaced with Four more components and fed to produce in the first and fed to the second delayed time of the first time mixed with It is therefore essential that they carry out the two actions in a range of four components superimposed or supplied in sequence. It must be set in base time to a sequence using the memories that accompany the respective switches. 765b In the manner a signal is transmitted from the transmitter for two periods of time as shown in FIG. be arranged in the same way as in the first data stream of a transmitter and in a channel in period of the first in the second period are transmitted in the channel the signal is transmitted in a division sequence of the encoder of the receiver can be arranged more The technique of reducing the number of the will be explained Figure 74 shows a base time allocation of four data components 810b and one When the other four data components 81 and 811c are inserted between the four data components 811b and the latter can be transmitted In the second decoder of 422 shown in the figure, it receives the four components of the first data stream r in the first input 521 and transfers them through a switch 812 to a one after the first fed component 8 expands during feeding the component and after completing the component processing the next component is fed to the expander 503 can process a row of components at time intervals by the same division as the substituting the simultaneous actions of a group of FIG. a base time allocation of the data components of a signal in which a component of the signal of the first channel for a program of a television program is allocated to a data domain of the signal and loading components Additional HDTV of the first channel signal allotted to the three signal 821 821c Other 822b data components are provided and input the data of the signal of the first channel that can be expanded with a circuit during the transmission others For all the signals of a channel processed by a single expander capable of operating at a speed Similar effects guaranteed for the assignment of components of data to other 821b and 821c as shown in the figure This is most effective in transmitting and receiving a common 4 PS or AS signal that has no digital levels Figure 77 shows database allocation of data components during the physical of two by HDTV and super HDTV or NTSG of low resolution standard of and By to transmit three NTSC data of NTSC standard and NTSC of low resolution or it is adjudicated to the 821 data domain of signal and of the standard of NTSC are awarded to three 821 and the HDTV component are allocated to the domains 823a and shown by the block diagram of figures 156 and a logical arrangement of levels based on layer discrimination Correction as described in the second to 4 VSB or is transported in the serial channel The channel is higher than the correction capability of errors that the channel as described in the second channel is higher in redundancy but more in error proportion than data channel 821 can be reconstructed at a lower ratio than that of the other data 82 821b and a low resolution component will be reproduced at a location distant from the transmitting antenna or at signal attenuation or pqr zone. Inside a view of the proportion of the S21 data of the channel are less affected by the interference of the signal than the data 921 821 b and of the channel that are discriminated and remain at a logic level as described in the second one and divide two physically levels toe levels determined by the discrimination of the distance between the error correction codes are placed differently at the level of the data demodulation A higher proportion than for the data In or the low resolution can at least be reproduced in distant service area or with a proportion of and be reproduced in a day N in an area of the components of and can also be reproduced To create one of the three signals diffusion of different levels can be reproduced This method allows the area that can receive shown in the figure of a double region to one as shown in the figure thus ensuring a greater opportunity to distract from the The figure 78 is a block diagram of the third video decodifier arranged for the data allocation at the time shown in the figure which is similar to that shown in the figure except that the third input for signal D3 is deleted and adds disposition shown in the figure in the signals and is fed through two input units 521 and a switch in the first As their including HLVL is d They are transferred in a sequence pair to a switch sequence will now be explained in relation to base allocation the figure shape of the first canat is first fed to the expander 603 where it is and all the four expanded components are sent through a switch to a mixer 556 where they are mixed to produce terminal realimema 1 of the switch 765a through the input 2 of the switch 765 to the mixer input In the second and of the signal D shown in figure 77 are fed to the expander 503 where they expand before being transferred through switch 321a to the mixer Se by the mixer 556 to an HDTV signal is fed by the 2 of the switch 765a to the output unit 521 for more The base time allocation of the data components for the one in figure 77 contributes to the simplest arrangement of the expander and the Figure 77 shows two levels of transmission and four levels of television signal will be using the sum of signal and one of HDTV of Figure 79 illustrates a time allocation of the data components of a signal three levels and in the data components of the same channel are arranged so that they are not superimposed with the figure 80 is block diagram of a modified video similar to figure in eJ which adds a third entry The base time allocation of the data components shown in the figure also contributes to the simple construction of the action of the modified 423 almost identical to the one shown in Figure 7β and is related to the assignment of base time shown in figure 77 and it will no longer be possible Multiplexing of data components is also shown Figure 821 and 822 data are increased in error correction capacity compared to the other data components and remaining so to a signal plus More 107 the data allocation for transmission is done at a physical level but in a two-level relationship also every component The data of the second channel is inserted between adjacent data components of the first channel so that serial processing can be executed on the receiving side and the same effects can be obtained as the base time allocation shown in the figure. The basis of the data shown is based on the modality of the logic level when the transmission speed of the two data components 821 and 8EE is decreased to or reducing the proportion of the physical level arrangement consists of three levels. Figure 82 is a block diagram of another video decoder decoder 423 for decoding signal arranged in base time as shown in figure that is of a simpler construction than the one shown. Its action is identical to Ja of the descodiñcador shown in the figure and will not be explained if the base time allocation of the data components shown in the figure also contributes to the similar arrangement of and the four data components of the signal are fed in respective time sections to a mixer. Thus the layout of the mixer circuits 556 or a plurality of circuit blocks as provided with the video mixer 548 of the figure can be arranged to change the connection that corresponds to each data component so that they are compatible in the action of time division to minimize construction of By the receiver can be minimized in general IOS construction It is understood that fifth reaitzacion the ASK modulation and the others including the FSK modulation and described in the second and third will be used with the same modulation FSK can be selected in any of the For the signal points of a multi-level FSK consisting of four components of f f3 and are divided into groups as shown in figure S8 when the distance between any pair of groups is increased to facilitate the multi-level FSK signal can be set as illustrated in the figure it is assumed that frequency group 841 of f and fZ is assigned 0 and group 842 of f3 and f4 is assigned f and f3 represent ú in and f2 and f4 represent 1 in the data transmission of two a in or it will be possible is shown in figure When the proportion of is reconstructed from y in t t3 and a combination of y 0 in t When the proportion of 0 is only reproduced in T t3 and t In this ta signal FSK can transmitted the arrangement of multiple This transmission of the multi-level FSK signal is applicable to the fifth and fifth The fifth embodiment can be implemented in the form of a magnetic recording and reproducing apparatus shown in the block diagram of the figure 84 because its ASK mode action is suitable for the magnetic recording operation and the figure is n diagram block and reader page 109 In the block diagram in figure modulation system of embodiment 5 comprising the transmitter and it becomes identical in constitution when the transmitting transmitting circuit 5a is replaced with a recording amplifier of ia and the receiving circuit 24a of the receiver 43 with a magnetic amplifier 857b signal reproducer To describe the HOTV signal it divides two sets of data to being compressed by the video encoder a first data stream is subjected to error coding in the ECC encoder and a second data is submitted to error coding in the ECC and then subjected to further encoding in grid encoder in grid 744b for enter modulator 749 of the transmitter case a compensating DC voltage is superimposed on the signal by a 856 voltage generator the data is recorded on a magnetic tape by means of a circuit On the transmitter a counterbalanced voltage is superimposed in the signal by a counterbalanced voltage generator and the signal is transmitted by the converter it is easy to reproduce the signal synchronous The signals of and 16VSS are received by the 32b and fed into a demodulator 852a by means of a down-converter. On the other hand the signal recorded by the recorder is reproduced by a reproduction head and sent to a demodulator by means of a reproducing circuit The input signal is demodulated by a demodulator such through the demodulator filter and the split data is subjected to error correction by the decoder and the second row of data is subjected to error correction by the decoder in 759b and ECC signal to expanded signal to the signal of Page 1 SDTV is distributed by the video decoder by means of ia in reduces the proportion of the transmission distance is extended and the image quality of the recorder and recorder is improved. in such the filter 858a of the receiver by using a comb filter that has such filtering feature can eliminate the signal as it moves In the figure, you can eliminate the interference of the signal and the error ratio can be set if the signal is always set. To avoid, as shown in the figure, the analog filter 760a is activated only when serial deteriorates due to the interference of the signal. analog television by the error ratio detector and deactivates when there is no interference so that the deterioration of the signal by ei can be avoided. In the case shown in the figure of the first data flow and the second flow of the proportion of errors is lower in the second flow of the high priority information such as information and information for the image data in the second stream can be stabilized the decoded image reproduction or each block of the embodiment 6 sixth embodiment of The present invention is a magnetic recording and reproduction apparatus which uses the above method of transmission, although in the fifth embodiment ion a multiple ASK data transmission is also described as feasible of the form adapting this invention to a recording and reproducing apparatus of a multiple ASK recorder system as shown in the block diagram of the figure. A multi-level or multi-manifold magnetic record can be made by applying the method of the present invention. ay QA as well as from Page 1 First that the method for performing multi-level recording a magnetic recording and reproducing apparatus of QAM or 32 QAM will explain according to CD method of the present Figure 84 is a diagram of a circuit block that a system of 32 4 8 ASK and 8 incorporating the modulator here, when the method is used for the system, these are shown in figures 137 and 154 in block diagrams in which SRQAM is applied to the tai system as shown in One or more of an HDTV signal input a magnetic apparatus 851 is divided and compressed by a video encoder 401 DS so that a low band signal remains through encoder and a frequency band signal through a second encoder of a low band component by video signal is fed to the first stream of an input unit 742 and a high band component including power to the input 744 of the second data stream of the two components is transferred to a modulator 749 of a 852 unit 743 of the first data stream adds an error corrector code to the low band signal in one ECC for the other second data fed to input 744 of the second data is of bits in the case of i 6 bits in case of 35 and 4 bits in case of 64 After which correction code is encoded the ECC signal till the encoder in grid such as the which is shown in the figures and in which a coded signal with a ratio of in the case of the case of 32 and in case of occurrence A signal of 64 has a first data stream of 2 bits and a second flow of 4 A cod 744b grid gauge gives the figure allows this 64 SRQAM signal to make a ratio coding in the data of Page 1 12 converted into data of 4 In the case of 4 8 En coding gn in the proportion of and can be done with that increases the redttndancia and decreases proportion of data while increasing the ability to correct fisto results in the reduction of the proportion of errors in the proportion ios Por io will greatly increase amount of information that can be transmitted by system reproduction or system As the system of transmission of 8 described above in connection with 3rd embodiment requires 3 bits per encoder ef grid and the grid with the proportion shown in figures 128 can be used and the entire block diagram will be as shown in the figure It is not possible to form the input 743 of the first data flow that is not encoded in grid as in figure 84 of this sixth embodiment. n because the first data flow an intrinsically error ratio This will be advantageous view of the simplification of the second flow without having narrow between compared to the first flow data for a worse proportion of The grid coding of the second data stream improves This is the worst ratio. There is no doubt that the configuration of the circuit is simplified, the grid coding of the first flow is eliminated. An operation for modulation is identical to that of the transmitter 3a fifth embodiment shown in figure 64 and will not be a modulated signal of the modulator. it feeds the reproduction circuit which is polarized alternating current by means of a polarization generator 856 and amplifier by an amplifier. Signal is fed to the magnetic head 654 to be recorded in a magnetic tape format of the recorded signal shown in the assignment of frequency to the record signal ta figure A main signal by one of which a carrier frequency records the information and also a pilot serial fp 859a with A page records The distortion in the recording operation is reduced since a polarization signal with an alternating current bias frequency for recording two of the three level signals shown in the US figure is recorded in a to reproduce these signals are given two thresholds and One signal will play the two levels while one of 859c will only reproduce the data depending on the of the Main one of 16 will have a point assignment of the signal shown in the figure a main signal of 36 SRQAM will have a point assignment of signal as shown in the figure When 4 A and AS are used the constellation will be as shown in the figures and In the reproduction of this both the main signal 859 and the pyl signal 859a are reproduced through the magnetic head 854 and amplified by the amplifier An output signal of the amplifier 357b is fed to a carrier 858 circuit sn which a filter 85 8a separates the frequency of the pilot signal fp with a frequency of 2f0 and a frequency divider 858b of reproduces a carrier frequency fú for transferred to a demodulator This reproduced carrier is used to demodulate the main signal in ei Assuming that the magnetic record by tape of a high proportion of 16 signal points can be so that and can be demodulated in the demodulator a vidGo decoder reproduces all the HDTV can reproduce a television signal of a high proportion of as the HDTV signal The lower is the proportion of cheap it will be. Up to one video tape in the market is lower than 10 dB in proportion to a quality tape. If a video tape is given a low proportion of it will not be able to discriminate all 16 or 32 valuable points of the For the first data stream can be reproduced while a flow of 2 3 bits or 4 bits of the second data stream can not be Sola Page A 2-bit stream of data from the stream of No HDV video signal of two is recorded and a low band that has insufficient capacity to reproduce a frequency band video signal can emit only one signal from the first stream. of low proportion and specifically low signal of a width of 7 As shown in the block diagram of the figure is to suppress output 759 of one of the input 744 of the second stream of and the second video to give the customers an aspect of the products of lower such a dedicated device low ratio of would include a demodulator the modulating QPS only modulate the primar of this apparatus only allows to record and reproduce the first stream of a wide-range NTSC video signal can be recorded and the video tape with a very small proportion of it is able to reduce the signal of high proportion of by a signal that can be used in said magnetic recording device and with a proportion of bits b but it will only reproduce the data stream. It is that the wide signal of NTSC is but the second flow is not reproduced in other an apparatus that has complicated configuration can reproduce an HDTV signal and the other device that has a simple configuration can reproduce a wide NTSC signal if the video tape includes the same multiple HDTV signal. In the case of a multiple state of two, four combinations will be made with perfect compatibility between the two tapes having proportions of and two playing recorders that have Different proportions for the recording and reproduction of this will have an effect on this a dedicated NTSC device will be of simple construction compared to an HDTV device In more than one circuit scale of an EDTV page will be that of the one of Per can be realized device low cost at a relatively cost The realization of the two HDTV and equipment gives and reproduction with n ability to record and reproduce image quality will provide various types The users can select a tape from a plurality of expensive tape from a cheap tape ratio to a low proportion according to the occasion so that the quality of the tape can be satisfied. that a capacity will be possible and could guarantee greater compatibility with a system As long as it will be possible to establish long-lasting standards for recording devices and other reproduction methods will be used for it. A multi-level record will be made by using phase modulation in the first and third A record made with AS explained in the fifth will be a state of two or three levels ai convert the current records of two levels to ASK records four levels or ASK of eight the two groups as shown in the figures and or The figures and A block diagram of the circuit for ASK will be as shown in Fig. 173 which is similar to the one that shows In the figure, the combination of the grid will reduce the proportion of In addition to the embodiments of the invention, a multi-level recording will also be carried out. The use of multiple tracks on a tape, a theoretical record of multiple levels will be feasible for The differentiation of ability to correct errors to discriminate data compatibility with future standards will be described at the establishment standards for recording and reproduction apparatus as is normally done taking into account the tape with the highest proportion available in the characteristics of record of a tape progresses Per ta ratio of Page 116 Per proportion of dB has improved with the tape used If the new standards will be established in 10 to ZO years due to an advance in the properties of a conventional method will have difficulty for maintain compatibility with standards It is new and old standards were previously compatible in one direction or not compatible between the present and the first standards are established for the first data record the second data stream in today's tapes if the CN ratio improves superbly in a data stream of level by a third stream will be added without difficulty that the invention is incorporated into the HDTV VCR capable of recording or reproducing a signal of 64 or AS will be made while maintaining perfect compatibility with the standards A tape records from first to third data flow according to the new ones may be supposed to be used in the recording capable apparatus only to reproduce the first and second of such in the first and second data stream can be reproduced perfectly even if the third data stream is left by the HDTV signal can by These are expected to have the merit of expanding the amount of data while maintaining compatibility between the new norms and the return to the explanation of the A reproduction of the magnetic head figure 664 and magnetic reproduction circuit 353 reproduces a reproducing signal of the magnetic tape and feeds it into the circuit of the operation. The operation is almost identical to the third and fourth embodiments and will not be reproduced in the first and second frames. flow of second flow of errors with a high code gain in a grid such as decoder so that it has a proportion of video 402 desmoduia and to produce a signal of Figure 131 is a block diagram showing an apparatus of three according to the present invention which includes a theoretical level in addition gives the two levels is essentially equal to the figure The difference lies in that first data flow divided into two by TD for a constitution of shown in the figure an HDTV signal is it firstly separates everything into two low and low band video signals and by means of a 401c video encoder and a video encoder it is fed n an input 743 first data flow of an input section The flow of data with MPEG grade image quality is coded to correct errors with code sop in an ECC encoder while the data stream is for correcting errors with a normal code gain in an ECC encoder and in a TDM 743c to be a data stream and in two-level signals a 7 and then recorded on magnetic tape 855 by means of magnetic In the operation of a recorded signal reproduced through the magnetic head SS4 is demodulated in and by demodulator 760 in which the explanation of the first data stream figure is demodulated into two and a half D's of the TDM 758c provided at the output 758 of the first stream of the data are encoded to correct the errors in an ECC 758a with a gain of the data may be at a lower rate compared to the data A video decoder 402a ios data and produces a signal On the other data are encoded to correct errors in an ECC decoder 758b with a page 18 code gain So the data have a threshold value gives a rate with data for will be when the signal level is not demodulated in a video decoder 402d and so add data to producing a signal width of the second data stream D2 is a demodulated in a decoder in grid 759b with errors corrected in an ECG Henceforth the data D2 is converted into a video afta f equency by a second video decoder 402b sum with the data and to produce a tai signal a higher threshold value is established for the data of 02 than the one of the CN ratio for data the data or signal of LDT a tape with a smaller proportion of data will be reproduced and an EQ signal will be reproduced from a tape with a normal ratio of V will be reproduced and a signal from a tape 655 having a high proportion of the magnetic apparatus of three levels can be made the following describes in the description the tape 855 has a reciprocal relationship between the proportion of da and the present invention allows users to select a degree of tape according to the content of the television program they want to record video signals that have image qualities in three degrees record record according to the cost of the one effect of the multi-level record will be described with respect to the reproduction da shown in the diagram of the record track igura tina record track with an azimuth angle A and a record track with an opposite azimuthal angle are alternately placed on the magnetic tape. The registration track 855 has a registration region in its central portion and the remainder are regions for recording is indicated in the special recording configuration is provided in at least one of several tracks of the record region registers the signal box of a signal of atta band is recorded in a re Register to record a whole record track register region This record format does not cause any new effect against a record operation A fast forward playback with reverse direction does not have a trace of the magnetic head with an azimuth angle A match magnetic track as shown in the present invention provides registration region 855c in narrow central region of the magnetic tape as shown this region only ss reproduces safely although it reaches a probability the reproduced signal can demodulate all of a image at the same time although the quality of LDTV level is varied to several tens of LDTV signals per second, perfect images can be reproduced during the advance playback operation allowing users to confirm images safely during advance operation. of the head corresponds to a stroke of the head the operation of reproduction of which it is understood that only a part of the magnetic track the reproducing recording format shown in the figure is shown in the reproduction operation, it allows even such reproduction operation to reproduce the recording region so an LDTV degree animation is produced in a way by the invention allows registration of a degree image LOTV within a narrow region which results in an intermittent reproduction of almost perfect with the quality of the image being of degree during operation and gives reverse reproduction of advance So that users can easily confirm the images even when they are looking for high Page 120 A method to respond to the operation of fast forward reproduction to a region 855c register is provided will be shown in the lower right pariah of the figure so that one box of the LDTV signal is recorded in another one register region of D2 is provided part of the recording region of Un subcanai this region records a part of the info Information related to a signal box The remaining LDTV information is recorded in The register region of 02 of the D2 register region as subcanai 02 has a data capacity of 3 to 5 times more than the subcanai. By the and D2 they can recording information gives a picture of LDTV in one more of the tape As the stroke of the head can be recorded in narrower regions and both the time and the surface are reduced to compared to the stroke of the even when the head is further tilts increasing amount of forward speed increases the probability of tracing completely to intermittent LDTV images will be reproduced even when the fast forward speed is increased from 3 to S as it only occurs in subcanai ef case of two this method is useless for the reproduction of the recording region by this region will not be reproduced in a fast forward playback operation of By another one year of three that the users Confirm the image even when the advance playback operation is executed at a speed of 3 6 times the speed of one of two. In others not only an excellent quality of the image is obtained in its cost but fast speed of producing images can Increase according to the page Although this embodiment uses a modulation of multiple more than modulation or can also be adapted to perform the fast forward playback operation as always present and the coding of the images is of a type A method of registering a VCR not in which the images compress scattered the video data in way it is possible in reproduction operation fast forward to reproduce all images in the image reproduced was one that consisted in the plurality of the blocks of the image that did not coincide in its times is provided by a multi-level VCR that can play the blocks the image with time If a plane coincides during the fast forward reproduction operation even if the image quality is of three register degree according to the present invention, it will be able to reproduce a high television signal such as a signal of when the system has a high proportion of While a degree signal by a signal or a degree signal by a low NTSC signal will be produced when the system has a low or poor ratio described in the description, the magnetic apparatus of the present invention can reproduce video as set out. of the same content even though the proportion of N is low or the error ratio is even though the resolution or quality of the image is relatively A seventh embodiment of the present invention will be described for the execution of the video signal transmission of four A combination of the transmission of Page 122 veles and construction of video data four levels will create an area of four is shown in the figure the service area from the first zone of signals to a third zone 890c and a fourth zone B method of creating such four levels will explain four levels can be implemented using four e determined by means of modulation or four levels of logic data discrimination in correction capacity of the previous difference in the proportion of CN between two levels and ia has to be increased to discriminate all four levels between this t the action and the difference in the proportion of CN between two s must by the arrangement of four levels build combination of two physical levels and two levels The division of Four of the signal will be a block diagram of a divider circuit 3 comprising a video divider 405c and the video divider contains three 34b and 404c that are positioned identically to the video divider circuit 404 shown in Figure 30 and will not be explained. Signal divides by ciphers into four data of low data and high data for median data is half that of the data. The video input signal is first divided by a 404a splitter into two components of and each component divided into two by an electronic signal. The intermediate between the high and low frequencies is a dividing point. Therefore, the video input signal is a signal of of a 123 lines has a vertical resolution of 500 lines and a value of y of the low frequency component is further divided by segments of a vertical segment output and original horizontal resolution that calls a signal after the compressor Higher frequency mixer mixer 772c is compressed by compressor 405b to one of compressor Ei by three compressors provided between divider 404c and divider 404a mixed by a mixer 772a to a signal is high lines in horizontal resolution and lines of a resolution and power divider again in four of the divisor 404b has 750 lines of one resolution and as a signal to the compressor The other three of 404b have 750 to horizontal resolution lines and by a 772b mixer a signal that fire is compressed by the distributed as a signal after signal as a LL signal or line data up to 500 HL or carries data of a frequency of and HH or frequency data of more than 750 lines the divider circuit 3 can provide four signal when the divider circuit of the transmitter 1 shown in figure sa replaces with the divider circuit the one of four will be the combination of multi-level data and transmission multilevel allows a video signal to decline in steps with respect to the quality of the in relation to the proportion of the expansion of the broadcast service area on the side of the action of and reconstruction is identical to that of the second receiver of the second embodiment shown in ia T8 and will not be explained In particular the mixer 37 is modified for the transmission of the video signal instead of communications d data and will not be explained further described in the second a signal received after demodulated and corrected is fed to a set four and 37 of the second receiver 33 of the 94 is a block diagram of a modified mixer 33 in the which i explain by their and 523d to one of HL and that they are equivalent to those described with figure If the bandwidth of the input signal is LL has a bandwidth of has a wide band of has a bandwidth of and has a The wide band of the signal LH is then divided by a splitter 531a and a video mixer 548a is input with the signal. An output of the video mixer 548a is transferred to the terminal of a video mixer. The video mixer 531a is identical to that of the video mixer 531a. second decoder 527 of the figure and not explained the signal HH is divided by a divider 531 b and is fed to a video mixer In the signal mixer HH mixes with the signal HL a signal which is then divided by a divider 531 c and send to the video calculator the video mixer combines the sum signal of LH and LL to a output of the video output of mixer 33 is transferred to the output unit of the second receiver shown in figure 125 88 where it is converted to television for If original signal has vertical lines or if it is a signal of a resolution of approximately its four components with different levels of the signal can be intercepted in their respective zones of the signal shown in the figure. The one of the four different components will be described in more detail the illustration of the figure represents a combination of figures 86 and as It is apparent with increases in the ratio of the general level of the signal to the amount of data increases from to by the steps of the four levels of the signal. Also as indicated in the figure the four components of different level and HH are accumulated in to the proportion of More the quality of a reproduced image will be increased as the antenna distance is reduced when L is When the signal is when the ñal is the signal LL LH HL se As if the bandwidth of the original signal is the quality of the image is enhanced increases in bandwidth of a depending on the area if the original is an HDTV of a line resolution the reproduced television is of and lines in the resolution in its receiving areas The quality of the image will be varied according to the level of the figure 96 shows the propagation of the signal of a conventional digital signaling system in which it is possible the reproduction of signals the proportion of is less than the interception of the signal can hardly be guaranteed in regions of interference of the regions shadows and other regions gives attenuation of the indicated by the symbol x of the area of figure 97 shows the propagation of a system of HDTV signal transmission of the present As shown quality of the image will be a full degree of lines on Page 126 where a degree 0 lines in the unfavorable distance bles where the quality can be intercepted and zules levels of the present 750 lines in the in F in an area where zone with transmission system interference is successfully received thereby increasing the simultaneous four and A are transmitted identical to the one while the other three n transmission service in relation to signal level of a telephone 762 is compressed and data Page and divided into a division circuit for predetermined time segments modulate in a modulator 4 and become the In the antenna sharing unit and an antenna 22 transmit a carrier wave carrying a will be intercepted by the base station described below and to return to other base stations to a switch of the exchange so as to communicate with others the receive a transmission of radio waves from other stations in the form of communication signals from others A received signal is in a modulator 45 of multiple levels of tip or and they are converted into data and a synchronizer 767 detects the time signals on the basis of the signals. These time signals are fed to the time divider circuit. The and are fed by a 503 and expanded to a signal that is transmitted to a speaker. figure shown in exemplary form shows arrangement of stations from which the three base stations 77 772 and 773 are located in the center of their respective receptacles and 770 hexagon or These base stations 772 and have a plurality of units of each similar to Figure 5 so that they have communication channels equivalent to the number of these transmitting units. A 774 base station is connected to all base stations and always the amount of communications traffic in each station is based on the result of the controller. the station 774 a general control of including the frequencies of channels to respective base stations controlling the reception of cells and Base Stations Page 128 The figure a view showing the distribution of quantity communications traffic in a system by one A diagram d A data 774a and 774 that have an efficiency of utilization frequency of 2 and a diagram that shows the data 774c with a de of 2 A sum of this data 774b and sa converts into fas data which represents one of which consists of 768 receptor cells and the efficiency of the frequency of use of 2 distributed without the population density a real urban area ss elevated in overpopulated areas 775b and which includes the concentration of the data that represents a quantity of communications traffic that shows several peak hours the Jugoes that correspond to those overpopulated areas 775b and in contracted with the other zone that has little amount of the capacity of a cellular cot enctonaf was established uniformly in a frequency efficiency for region of as shows data no matter what the amount of TF traffic shown by the data is not effective it is the same efficiency of no matter what the In order to compensate for this lack of systems, conventions have allocated many frequencies to regions that have a large number of increased or reduced number of receiving cells. Without an increase in the number of channels the spectrum is restricted. Multiple transmission conventions by 16 QA or 64 QAM mode increase the power of reduction of the receiving cell will induce an increase in the number of stations increasing the costs of It is ideal for improving the efficiency of a system that will increase frequency efficiency of the region that has the most amount of traffic and reduces the frequency efficiency of the region that has less A multi-level signal transmission system in accordance with the present invention makes this This will be the figure that shows the amount of communication and distribution The present figure shows the amount of communication in the cells 77 0 7 taken along the 768 and 770 of a group of channels while the and 770 use frequencies of a group of channels that is not controlling ds the base station 774 shown in figure 116 the one of these according to the amount of traffic the cells In the figure a diagram d represents A distribution of a channel A diagram s represents a distribution of the channel diagram d represents a distribution of communications of all A diagram TF represents amount diagram P shows that of buildings and and 770 a system of For example, it is possible to obtain efficiency of three times that of the base areas as indicated by data 776b and While the sequence of use decreases in steps of 6 to 4 and as it goes out to the areas of ios If the power of the 2-zone areas narrows more than the cells by the 777c dotted lines of Without an equivalent, you can easily obtain with a little increase in power. ions of a station capable of responding to the modified use of 3PA that it obtains by placing from S to a place distant from the station of 130 by means of the 16 SRQAM instead of so shingles from and the place the maximum power of no increase in comparison By another type whose circuit configuration has been amplified a block is shown in this figure you will be able to communicate with the other phones it keeps This will be same of type SRQAM showing block diagram of the figure as they will provide three different types of telephone with different systems of small and light size is important in telephones In this the system of 4 SRQAM with a configuration of soto circuit will be suitable for users who want a small and light telephone although the efficiency gives the frequency of use is low can raise the cost the system of the present invention can be adapted to a wide variety of how a transmission system with a distribution is achieved n of d as the one in the figure for a ta frequency of use will be effectively improved if the placement of the base stations is determined to suit the amount of traffic indicated by the effect of the present invention will be a large system whose receiving cells are smaller because numerous stations are needed. subbase can be easily installed in the places where the largest amount of data allocation each time segment explained in reference to the figure where the figure shows a conventional time segment and the figure shows a time segment conventions according to the octave The system It executes a transmission or from the base station to a figure where the S signal transmits a Page 131 of time and C segments time on the other transmission or the mobile station to the SQ station executes in such a way signal synchronization S and transmission signals of the channels b and c are transmitted by time segments 718c and frequency invention qu and characterized by a system of transmission of multiple by 64 allows to have data of three levels consisting of 2 as shown in the figure as data and transmitted by their time segments have double data rate by cough 782c and It means that the same sound quality can be transmitted in the middle of the time span of the respective segments and it becomes a double transmission capacity can be acquired in the region of two levels shown in the figure or in the surroundings From the same station the time segments run data through the use of a signal of 64 the transmission capacity is the one segment of can be used for three channels of This would be used for closer to the De station than can be obtained a triple communication capacity in the same of the efficiency of the reai transmission would be reduced to advisable to enhance the effect of the present invention to be matched as perfectly as possible is the amount of transmission of this invention with the regional distribution of the actual amount of an urban area consists of a fairly populated district of buildings and a wild fence that surrounds this even a suburb reai consists of a residential district and fields or a forest around a district urban and suburban areas Page resemble the diagram so that the application of the present invention will be Figure one showing the time segments by method where figure shows a conventional method and the Figure shows you conventional method the time segments for transmitting portable telephones of channels A and on same frequency and time segments 787a 7787b for transmission from the as shown in the figure By the embodiment of the present invention uses a segment of 788a time the reception of a channel and a 788c time segment for transmission to a channel co mo is shown in the figure The width of the time segment is approximately case of the 64 mode a time segment is for channel reception and a time segment is used for transmission to a channel The width of the time slot of approximately To save energy, a transmission of the channel is executed by using a normal time segment of 4 while the reception is executed using a 7S8p segment of time which is a segment of the transmission force. communications may increase due to a prolonged time of This will be effective for a small portable telephone equipped with a small battery when the battery is almost described in the description the present invention allows the distribution of the transmission capacity to be determined in such a way that coincides with the distribution of the increased thus the effective capacity of the present invention allows stations of or is Select freely between two or three capacities to reduce efficiency The frequency of the use of the frequency is selected. The consumption of the energy is reduced. If the efficiency of the frequency of utilization is selected, it will save costs. By adopting a lower capacity, it will simplify the circuits and reduce the cost. As explained in the embodiments, one of the characteristics The present invention is the compatibility that is maintained between all the stations. The present invention not only increases the transmission capacity but also allows to offer a variety of clients from a telephone to telephone. The ninth embodiment of the invention in relation to the ninth embodiment uses invention in transmission system The figure is a block diagram of and the figure a diagram showing the beginning of an OFDM OFD is of cough FD and has better efficiency frequency of use compared to an FDM because OFDM is adjacent to two carriers to square between Is the OFDM can tolerate the obstruction of tray ectoria such as a phantom by can be applied in the future to the digital transmission of music or the digital transmission of Corno is shown the principle diagram of the figure OFDM converts one by means of a converter 791 of series a into data arranged on an axis frequency 793 at intervals so that the sub-kannels This signal is inversely converted by a modulator 4 having an inverse FFT in a signal at a time axis 799 to produce an inverse FFT signal serial is transmitted during an effective symbol period of the period of time An interval gives 797 saved with a quantity tg provided between action periods of HDTV according to this ninth embodiment explained in reference to the block diagram of the figure showing a hybrid system of an HDTV input signal is separated from the HDTV encoder. 401 video in three video signals one band low frequency band one of medium to frequency band and one band and one are fed ection a 743 first encodes ECC with a high gain and one encodes ECC with a code gain A 743 executes the division of time by multiptexor the signals produce a signal that is then fed to a serial converter a in a modulator 01 consists of n pieces of data that are input to the first n-piece inputs of a modulator 41 and another high-band signal to an input 744 of a second of data of the input section the signal is encoded by the Correction of an ECC 744a and then in a grid encoder is supplied to a serial to parallel converter of the 852a and converted into n pieces of data that are input into the second inputs of the n pieces of the modulator 4a and modulators of 4b and 4 produce the signal of based on data from the input of the first data stream and input data of the second stream of these pieces of modulator have a different carrier between As shown in the figure the p 794b and are placed around the frequency axis so that two adjacent carriers are at phase between the pieces n modulated by the modulated are fed into the inverse FFT circuit 40 and from the dimension of the frequency axis 793 they place the dimension 790 of the axis of the time signals 796a are produced and with an effective symbol length of provides a guard zone 797a of Tg seconds between the time zones effective symbol 796a and to reduce multiple is graphical showing if and from ds guaros the interval takes into account the use and fix the ds iarg that time by per ghost ds ía js signals 40 FTT inverse ss convert converter 4e of a dst transmitter circuit as the receiver action ds of ss input section 24 ds received a signal 852b and by signal signal 7S9 axis of 793a is in the figure that ds base time is suitable for carriers 734a frequency and these quadrature carriers enter L a figure shows Ss sañas 16 that feeds respective of 4Sa and 45b a ds which signal 16 from yy ss by a converter to parallel series-parallel converter in original signals and system is of levels of shown D and will be under reception conditions but will be under worse conditions of by low proportion of the signal desmoduiada se in output section tub gain code higher an error signal of the signal is played even under worse conditions The signal converted by a video 402c to a low frequency band signal and one of the signal is converted by itself 1 of video in a frequency band and the One 75SB and one second of video 402b to an afta afta signal and it emits as a signal of one of emitted in the case of the signal of low frequency band The signal of A wide-grade NTSC EDTV is broadcast from the medium frequency to the low band signal and an HDTV signal is produced by adding medium frequency band signals. As in the previous one, one can receive a levisión with a rate of dependence on the proportion of the ninth embodiment performs a transmission of multiple signals through the combination of OFDM and that was not obtained by OFDM A is certainly strong against such as the ghost of the guardian because Tg absorb a multiple interference signal By the OFDM is applicable to digital television broadcasting for television receivers in While no OFDM signal is received when proportion of is less than a predetermined value because that of the signal transmission is of a type of multiples Without present invention can solve this by combining OFDM with the thus performing a degradation according to the proportion of in video signal reception without being disturbed by the trajectories When television signal is received in the behavior of a not only disturbs the reception by the multiple trajectories but it deteriorates proportion of By area of service a television transmission station will not be as if it is for the trajectories On the other hand a reception of the vision of at least LDTV degree will be assured by the combination with the transmission of multiple levels of even when the TV picture a car is less than 10 the television signal of a low degree LDTV will provide an image quality service area LDTV grade of a television in a car will be greatly If used in all frequency band of the current semiconductor technology can not prevent the OFDM circuit scale from transmitting only a frequency band television signal to be treated as shown in the block diagram of the medium frequency band component figure and a high frequency band DZ component of an HDTV signal it is transmitted by a muitiplexing modulator and then transmitted to a frequency band A by FDM by a signal received by recept or 43 first that separated by frequency by a FDM 40e demodulated by demodulator 4b of the present the signal thus demodulated is reproduced HDFE components of medium and high frequency the form that the figure The video fte 402 is identical to the embodiments and 3 and will not be explained. While signaling a low frequency band signal of degree 1 converts from serial 791 to parallel one and is fed to the OFDM modulator which executes QPSK modulation of 16th signal it is converted by a FTT 40 inverse in a base time signal and one frequency band through FDM Page another a signal received by ei 43 separated by 1 converts into several frequency signals case in a 40a se a of FDM of base frequency in respective 4a and y are powered by a parallel converter to where the signal clamp of LDTV degree is broadcast receiver an LDTV signal is modulated by OFDM faith transmission of multiple figure method allows it to provide a complicated OFDM circuit only for a signal proportion of the LDTV signal is The performance of the ISF is reduced to what results in an outstanding reduction in the performance of the system. An OFDM signal transmission system is strong against multiple trajectories and employing tai as a car television set or a music receiver that it is exposed under strong obstruction of trajectories For such an image of small size of less than 4 to 8 is the From this it can be deduced that the OFDM modulation of a television signal of high tai like HDTV or EDTV will have less In others the reception of an LDTV-grade signal would be sufficient for a television of the multiple paths are constant in a fixed station as a television By the countermeasures against multiple paths relatively less effect will have the station unless it is the area Using the OFDM for the HDTV components of medium and frequency band is not in view of the current scale of circuits that are still By the The present method in which soyamenie is used for the frequency band television signaling as shown in ia can greatly reduce the scale of the OFDM circuits less than without losing the intrinsic effect of OFDM capable of greatly reducing the multipath obstructions of LDTV when a mobile station is received such as in a Although the OFDM modulation Figure 138 is executed only by the it is also possible to modulate by means of En tai one by one fingers the transmission of and a multiple transmission to Even in the gradient graduation, it will be possible for ugly LDTV and SDTV signals to be received with image quality that depends on the receiving serial or the sensitivity of the multi-level signal transmission according to the invention. it is feasible in this way and produces the various effects described. It is whether the transmission of multiple levels of the signal of the pre This invention is incorporated with a possible to provide a system resistant against multiple trajectories and alter the degree of data transmission according to the change in level of the signal that can The figure shows another method of the transmission system of multiple where the subchannels OFDM are assigned to a first layer and the subchannels are assigned to a second layer providing a guard 802a of between these two the first and the figure shows a difference in electrical power that is provided to differentiate the transmission power of the first and second layers and The use of differentiation allows the increase of the electric power of the first layer 801a in the without obstructing the television transmission service as shown previously In this a threshold value of the proportion of C capable of receiving The first layer 801 to lower than for the second layer 801 as shown in the figure. For the layer a can be received. going even in a zone of low signal or in a zone with enough a transmission of 140 gives two as it is a figure This is called a System of OFDM by Power in this 3t this system is combined with system previously three layers will be in Figure 4 shows the circuit through which the data of the first layer passes circuit 791a of the data flow and modulates the carriers of f by the modulators with a large signal in inverse FTT. layer passing through the circuit second data stream modulates the carriers by modulators with an ordinary amplitude are modulated by in reverse FTT these modulated by OFDM are transmitted by the circuit A signal by the receiver 43 is separated into several signals with carriers by medium The carriers were demodulated by the first data stream D by the first layer by another carrier f demodulated by demodulators to reproduce second data or the second at 801a it has such a large electrical energy that it can be received even in an area In this way, the system carries out the transmission of two-layered signals and, if it is possible, it will be possible to provide 3 a Because the circuit 144 is identical to the circuit of figure 23 in relation to the remaining operations, it will not be perform a signal transmission of levels with time-weighted OFDM according to the present Although the system is accompanied by a zone of was described to be the adverse of the phantom if the signal delay time 141 or trajectories satisfies the requirement time delay will be Relatively for example of several in a fixed station the television receiver uses its value is the cancellation of the phantom is relatively by the reflected wave will increase in the event of a delay in varis in the movement of the vehicle in So cancel the phantom To be So the transmission gives the serial of multiple levels for that receiver gives mobile television so that it can eliminate the adverse effect the tr Ayectories The multi-level transmission according to the present invention is explained to contained symbol that layer A can be intensified against the phantom if ae sets a guard time of layer A that is longer than guard time tgb the layer shown in figure From this multi-level signal transmission multiple trajectories can be performed by means of the weighting of system time called Weighted by Guardian Time If the number of time symbol Ts not from layer A and in layer time symbol tsa of A is set to be greater than the symbol time of the layer With this one width of the carrier A is larger than the width of the carrier Because the proportion of errors is lower than the demodulation of the layer A symbol compared to that of the symbol of the layer So that differentiation layers A and in the time weighting symbol Ts can transmit signals of two layers against the trajectories The system is called an OFDM by spacing of the carrier Ai performing the transmission of two-layer signals based on where a low-resolution television signal is transmitted by layer A and a component of f is transmitted by the television receiving layer. vehicle can receive in stable form the television signal of no matter how persistent the transmission of multi-level signals with respect to the proportion of can be realized by the time symbol in the between layers A and if this is with the reception of signal in Vehicle receiver can be stabilized High resolution is normally required on the vehicle TV or on a portable TV As a proportion of time of the symbol time a signal of low resolution is the overall efficiency of the transmission will not decrease much even if the time of the one of the present invention is used to suppress trajectories with an emphasis on low resolution faith. In this service, the mobile station such as a portable television receiver or vehicle may be compatible with a station such as the television without reducing the transmission efficiency if it is combined with that described above. Also the reception of the signal in the mobile station will be stabilized. The effect of the trajectories Sn will be explained in more detail in the case of the multiple paths 81 and 81 with shorter delay times as shown in the figure. of the first and second layers can be received by the signal of Can be in case of multiple paths 81 c and 81 with a longer delay time as in the figure the signal B of the second layer can not be received anymore that the guard time tgb enough signal A of the first layer can be received without being affected by the multiple paths since the time of g uarda is enough As described the signal includes the frequency component of the signal The signal A Low-frequency component of By the television in the vehicle can reproduce the signal It is like the time symbol Tea is longer than the time symbol the first layer is resistant against deterioration of the proportion of Such discrimination of the guard time and the time symbol Effective to perform the transmission multi-layer three-dimensional signals in a form If time discrimination keeps combined with in the circuit in the figure it will perform the transmission of signals in multiple layers that is effective against multiple paths and the deterioration of the proportion given the following is an example The less the proportion of the signal, the greater the delay of the trajectories. This is because the reflected ta increases in comparison with the wave Per is shown in the figure if DU proportion is less than 30 the delay time the 30 s by the increase in the wave As it can be understood by figure it will be possito receive the signal even in the worst conditions if the Tg higher than Por is set as shown in detail in figures and three groups are assigned from the first the second and the third to a period of 2 ms from a television signal of 1 The times of guard or of these three groups have been weighted so that by 50 5 and shown in the figure the signal transmission of layers that is effective against multiple trajectories is made in the figure where the three layers are SQ1 by 801 Yes to all the quality It will undoubtedly decrease the efficiency of Sin if it only applies to the signal of Page 144 including information for the purpose of suppressing trajectories if a general efficiency does not get worse as the first layer 801a has a long guard time Tg long that 30 will be received even by the television receiver in the circuit shown in the figure the TV quality requirement is grade. By its capacity it will be approximately 1 Mbps of Ja ciase Si ei t time or set to 200 with respect to the period of 2 as shown in the figure the transmission capacity becomes 2 Although the symbol ratio is reduced less gives a capacity of approximately 1 Mbps it can be guaranteed the grade image Although the efficiency of the transmission is reduced the error ratio can effectively be reduced by the CS according to the present invention. If the one of the present invention is combined with the efficiency deterioration of the symbol times 796b and of the same symbol number can be avoided. it differs as 150 and 100 By the proportion of errors it becomes in the order of the second and third layers to realize the signal in multiple A to be realized the effective transmission of the signal in multiple layers with respect to the proportion of When combining ei and It re-creates a transmission with multiple layers with respect to the trajectories and the proportion of how the figure is. In the case of the layers y and 8S the degree can be received stably as the receiver of the vehicle subjected to multiple trajectory and the low ratio of In the second and layers 801 by standard resolution SDTV grade signal can be received per fixed station per page 145 within the limits of the service area which is generally subject to a low proportion of the HDI already in third layer 801 c occupies more than half of the HDTV signal can be received already aita and is less due to the direct wave In this a two-dimensional service of transmission by layers is effective for the proportion of and for the multiple trajectories can be realized by combination of and the or the combination of and according to the present the present invention makes an effective layer type signal transmission system for the proportion of GN and the multiple path has been performed before Artologies A time taof a signal three levels in a two-dimensional transmission multilevel with three levels of and three of multiple trajectories the figure is shown As shown by the LDTV is placed in the segment 796a1 of the first level the level with the highest resistance to the interference of the signal synchronization of address signal and Other important signals of aita priority are placed on the segment that has the highest resistance to the interference path and to the segment that has a high resistance to deterioration. The common signal of either low signals and high priority HDTV signals are placed on the levels 2 and 3 of the level The signals of and other signals of high-frequency components are placed in the levels and 3 of the level As the deterioration of and the interference to trajectories increases, the speed of which causes the resolution of the signal to fall the elegant three-dimensional degradation shown in te 153 and can not be obtained with methods As shown in the figure ia Page 146 The transmission and three is obtained with three time delay ratio and the speed of the present embodiment has been described using the example of a multiple transmission structure obtained by combining the invention with faith has described or combining CD but can be obtained others of multi-level transmission are combined and weighted or with other transmission methods of multiple C-ratio. The figure is obtained by transmitting the energy of the 794c carriers and with less weighting with the carriers and achieving a power-weighted of two they obtain two levels when weighted with power the carriers 795a and perpendicular to the carrier to carriers and although we obtain a four realization only two levels are in the figure As it is shown in ia as the carrier frequencies are the interference with other analog in the frequency are dispersed and there is an adverse effect using a time position and varying the width of guard times 797b and for each symbol 796b and 796c as shown in the figure you can achieve transmission of three levels and trajectories and levels Using displayed time positioning 3a figure data level and C are distributed on the axis of As even if burst noise times the destruction of data can be avoided and the television can be stable by means of the interleaving of different data in the intercalation with the data of the level A the noise burst produced by the ignition of other vehicles can be significantly reduced in television receivers 147 The block diagrams of a specific ECC encoder 74 j and a specific decoder gives 749j show in the figures and the figure is a block diagram of T processor box in the RAM 936a 936b is shown in figure and the distance L1 shows in the figure The interference of the raid can be reduced to intercalate the data of this Using a VSB of 4 of VSB of 8 or of VSB of 16 and shown block diagram of receiver VSB and ai block diagram of transmitter VSB or using a transmission apparatus QAM or PS as described in embodiments and burst noise can be reduced and can be achieved Television reception with very low noise levels in ta per station Utilizing the transmission of by method in stabilizing the reception of LDTV grade television by receivers including television receivers vehicles and televisions because level A has the effect of reducing the interference of the burst noise in addition to multiple path interference and the deterioration of the ratio of The multi-level signal transmission method of the present invention is intended to increase the frequency utilization but all transmission systems may be suitable because it can cause types of receivers decline in the use of advisable for use with a community system satellite communications for subscribers selected to use the transmitters and advanced receivers designed for the best use of frequencies and energy Tai system transmission signals with specific purpose or subject to ta present The present invention would be advantageous to be used with a satellite or terrestrial transmission service is essential so that in the same standards by at least for 50 Page 14S During the period the transmission standards should not be altered but improvements will be provided in that they will correspond to advanced energy achievements for the transmission of signals that will surely be increased at any television station. guarantee the reception of the signal from television programs to any type of from the common or the advanced ones in the signal transmission system of the present invention can provide a compatible transmission service for existing NTSC and HDTV systems and also for an extended n future for data transmission The present invention is more about the frequency than the use of the signal reception sensitivity of each is available depending on the level of state of the signal to be given that the power of the Transmitter does not need to be upgraded So existing satellites that offer little power for receiving and transmitting a signal can be better used with the present system's system also available to execute the same standards that correspond to an increase in transmit power in the future and providing the compatibility between type and type receivers the present invention will be more advantageous to be used with transmission standards by the multi-level method for transmission of the signal of the present invention is most favorably employed for the television transmission service in which the use of energy is not sum compared to the Transmission service by The results are talas that the regions of attenuation of signals in an area that are attributed to a conventional digital HDTV transmission system are greatly reduced in extension also obtains the compatibility of an HDTV receiver or screen with the system service area is increased from Although the embodiments of the present invention will roll to those of 16 and 32 including and 256 QAM techniques will be employed with equal multiples techniques of ASK and FSK will be applicable to the combination of the TD with the present invention lian described Without the presented invention can be combined with any ios and 15Q dispersion insufficientOCRQuality

Claims

Claims 1. A signal transmission apparatus for transmitting a first data stream and a second data stream, comprising: an operable modulator for assigning each of said first data stream and second data stream to a respective constellation in a vector spatial diagram for producing modulated signals, wherein the number of signal points of the constellation of the first data stream is different from the number of signal points of the constellation for the second data stream; a Fast Fourier Transformer (IFFT) which operates to convert the modulated signals into a converted IFFT signal, having an effective symbol part and a guard interval, according to the Orthogonal Frequency Division Multiplexing; and an operable transmitter for transmitting the converted IFFT signal; where the first data stream has an interval data to represent the guard interval. 2. A signal receiving apparatus, comprising: a Fast Fourier Transformer (FFT) operable to convert a received signal, having a symbol part effective and a guard interval, within a converted signal of the FFT according to the Orthogonal Frequency Division Multiplexing; the received signal has information of a first data stream and a second data stream, wherein the first data stream and the second data stream are each assigned to a respective constellation in a vector spatial diagram, the number of points signal of the constellation for the first data stream is different from the number of signal points of the constellation for the second data stream; the first data stream that has an interval data to represent the guard interval; and an operable demodulator for demodulating the converted signal of the FFT to produce the first data stream and the second data stream, wherein the second data stream is produced according to the interval data. 3. A signal transmission system for transmitting and receiving a first data stream and a second data stream, said signal transmission system comprising a signal transmitting apparatus and a signal receiving apparatus, said signal transmitting apparatus comprising: an operable modulator for assigning each of said first data stream and second data stream to a respective constellation in a vector spatial diagram to produce modulated signals, wherein the number of signal points of the constellation of the first data stream is different from the number of signal points of the constellation for the second data stream, and the first data stream has an interval data to represent a guard interval; a Fast Fourier Transformer (IFFT) which operates to convert the modulated signals into a converted IFFT signal, having an effective symbol part and a guard interval, according to the Orthogonal Frequency Division Multiplexing; and an operable transmitter for transmitting the converted IFFT signal; said signal receiving apparatus comprises: a Fast Fourier Transformer (FFT) operable to convert a received signal, having an effective symbol part and a guard interval, into a converted signal of the FFT according to the Orthogonal Frequency Division Multiplexing; an operable demodulator for demodulating the converted signal of the FFT to produce the first data stream and the second data stream, wherein the second data stream is produced according to the interval data. 4. A signal transmitting method for transmitting a first data stream and a second data stream, comprising: assigning each of said first data stream and second data stream to a respective constellation in a vector spatial diagram to produce modulated signals, where the number of signal points of the constellation for the first data stream is different from the number of signal points of the constellation for the second data stream; converting the modulated signals into a converted IFFT signal having an effective symbol part and a guard interval, in accordance with the Orthogonal Frequency Division Multiplexing; and transmitting the converted IFFT signal; where the first data stream has an interval data to represent the guard interval. 5. A signal receiving method, comprising: converting a received signal, having an effective symbol part and a guard interval, into the signal converted from FFT according to the Orthogonal Frequency Division Multiplexing, the received signal having information from a first data stream and a second data stream, wherein each of said first data stream and second data stream is assigned to a respective constellation in a vector spatial diagram, and the number of signal points of the constellation for the first data stream is different from the number of signal points of the constellation for the second data stream; the first data stream has an interval data to represent the guard interval; and demodulating the converted FFT signal to produce the first data stream and the second data stream, wherein the second data stream occurs according to the interval data. 6. A method of transmitting and receiving signals for transmitting and receiving a first data stream and a second data stream, said signal transmitting and receiving method comprising a signal transmitting method and a signal receiving method, said signal transmitting method comprises: assigning each of said first data stream and second data stream to a respective constellation in a vector spatial diagram for producing modulated signals, wherein the number of signal points of the constellation for the first data stream is different from the number of signal points of the constellation for the second data stream; converting the modulated signals into a converted IFFT signal having an effective symbol part and a guard interval, in accordance with the Orthogonal Frequency Division Multiplexing; and transmitting the converted IFFT signal; said signal receiving method comprises: converting a received signal, having an effective symbol part and a guard interval, into the converted FFT signal according to the Orthogonal Frequency Division Multiplexing; demodulating the converted FFT signal to produce the first data stream and the second data stream, wherein the second data stream is produced according to the interval data. 7. A signal transmitting and receiving apparatus for transmitting and receiving a modulated signal VSB having information of a first data stream and a second data stream, the apparatus comprises a transmitting apparatus and a receiving apparatus, said transmitting apparatus comprises: a frame encoder operable to frame code to the second data stream to produce a frame-encoded data stream; an operable modulator for modulating the first data stream, without being coded in framing, for a modulated signal VSB of level m and modulating the data stream encoded in framing to a modulated signal VSB of level n, n being an integer greater than m, wherein the first data stream has a synchronization data represented for at least one unique word; and an operable transmitter for transmitting the modulated signal VSB of level m and the modulated signal VSB of level n; said receiver apparatus comprises: an operable demodulator for demodulating the modulated signal VSB of level m for the first data stream, and demodulating the modulated signal VSB of level n for a demodulated data stream, wherein the demodulated data stream is reproduced from according to the synchronization data represented by at least one unique word; Y an operable framework decoder for decoding the demodulated data stream for the second data stream in lattice. 8. A signal transmitting apparatus for transmitting a modulated signal VSB having information of a first data stream and a second data stream, the apparatus comprises an operable frame encoder for encoding the second data stream in a frame to produce a stream of data encoded in framework; - an operable modulator for modulating the first data stream, without being coded in framing, for a modulated signal VSB of level m and modulating the data stream encoded in framing to a modulated signal VSB of level n, n being an integer greater than m , wherein the first data stream has a synchronization data represented for at least one unique word; and an operable transmitter for transmitting the modulated signal VSB of level m and the modulated signal VSB of level n. 9. A signal receiving apparatus comprising: an operable receiver receiving a transmitted modulated signal VSB having information of a first stream of data, which has not been encoded in framework, and a second data stream that has been encoded in fabric, where the transmitted modulated signal VSB includes a modulated signal VSB of level m and a modulated signal VSB of level n, n being an integer greater than m, and the first data stream has synchronization data represented by at least one unique word; the demodulator operable to demodulate the modulated signal VSB of level m for the first data stream, and demodulate the modulated signal VSB of level n for a demodulated data stream, wherein the demodulated data stream is reproduced in accordance with the data of synchronization represented by at least one unique word; and an operable framing decoder for decoding the demodulated data stream for the second data stream in framing. 10. A method of transmitting and receiving signals for transmitting and receiving a VSB modulated signal having information from a first data stream and a second data stream, the method comprising a transmission method and a reception method, said method of Transmission includes: encoding the second data stream in lattice to produce a data stream encoded in lattice; modulating the first data stream, without being coded in framework, for a m-level VSB modulated signal, and modulating the coded data stream for a n-level VSB modulated signal, n being an integer greater than m, where the first data stream has synchronization data represented by at least one unique word; Y - transmit the modulated signal VSB of level m and the modulated signal VSB of level n; said receiving method comprises: demodulating the modulated signal VSB of level m for the first data stream, and demodulating the modulated signal VSB of level n for a demodulated data stream; wherein the demodulated data stream is reproduced according to the synchronization data represented by the at least one unique word; and decoding the demodulated data stream for the second data stream in lattice. 11. A method of transmitting signals to transmit a VSB modulated signal having information of a first data stream and a second data stream, said method comprises: frame coding the second data stream to produce a frame-encoded data stream; modulating the first data stream, without being coded in framework, for a m-level VSB modulated signal, and modulating the coded data stream for a n-level VSB modulated signal, n being an integer greater than m, where the first data stream has synchronization data represented by at least one unique word; And transmit the modulated signal VSB of level m and the modulated signal VSB of level n. 12. A method of receiving signals comprising: receiving a transmitted modulated signal VSB having information from a first data stream, which has not been encoded in a frame, and a second data stream that has been encoded in a frame, wherein the transmitted modulated signal VSB includes a modulated signal VSB of level m and a modulated signal VSB of level n, n being an integer greater than m, and the first data stream has synchronization data represented by at least one unique word; demodulating the modulated signal VSB of level m for the first data stream having synchronization data and has not been encoded in framework, and demodulating the modulated signal VSB of level n for a demodulated data stream; wherein the demodulated data stream is reproduced according to the synchronization data represented by the at least one unique word; and decoding the demodulated data stream for the second data flow in lattice. 13. A signal transmitting apparatus for transmitting a first data stream and a second data stream, comprising: an operable modulator for assigning each of said first and second data streams to a respective constellation in a vector spatial diagram for produce modulated signals, wherein the number of signal points of the constellation for the first data stream is different from the number of signal points of the constellation for the second data stream, and an operable transmitter for transmitting the modulated signals, wherein the first data stream has a data and synchronization data to demodulate the modulated signals corresponding to the second data stream, and where the Synchronization data is located at the beginning of the first data stream, and the demodulation data follows the synchronization data. 14. A signal receiving apparatus, comprising: a receiver operable to receive a transmitted signal to produce a received signal, the received signal has information of a first data stream and a second data stream, wherein each data stream is assigned to a respective constellation in a vector spatial diagram, the number of signal points of the constellation for the first data stream is different from the number of signal points of the constellation for the second data stream, and where the first data stream has a data and synchronization data to demodulate the received signal corresponding to the second data stream, the synchronization data is located at the beginning of the first data stream, and the data to demodulate follows the synchronization data; and an operable demodulator for demodulating the received signal to produce the first data stream and the second data stream, wherein said demodulator produces the second data stream according to the data for the demodulation. 15. A signal transmission system comprising a signal transmitting apparatus and a signal receiving apparatus, said signal transmitting apparatus transmits a first data stream and a second data stream, comprising: an operable modulator for assigning each of said first and second data streams to a respective constellation in a vector spatial diagram to produce modulated signals, wherein the number of signal points of the constellation for the first data stream is different from the number of signal points of the constellation for the second data stream, and an operable transmitter for transmitting the modulated signals, wherein the first data stream has a data and synchronization data to demodulate the modulated signals corresponding to the second data stream, and wherein the synchronization data it is located at the beginning of the first data stream, and the demodulation data follows the synchronization data; said signal receiving apparatus comprises: a receiver operable to receive a transmitted signal to produce a received signal; Y an operable demodulator for demodulating the received signal to produce the first data stream and the second data stream, wherein said demodulator produces the second data stream according to the data for the demodulation. 16. A method of transmitting signals for transmitting a first data stream and a second data stream, comprising: assigning each of said first and second data streams to a respective constellation in a vector spatial diagram to produce modulated signals , wherein the number of signal points of the constellation for the first data stream is different from the number of signal points of the constellation for the second data stream, and transmit the modulated signals, where the first data stream has a data and synchronization data to demodulate the modulated signals corresponding to the second data stream, and wherein the synchronization data is located at the beginning of the first data stream, and the demodulation data follows the synchronization data. 17. A method of receiving signals comprising: receiving a transmitted signal to produce a received signal, the received signal having information of a first data flow and a second data stream, where each data stream is assigned to a respective constellation in a vector spatial diagram, the number of signal points of the constellation for the first data stream is different from the number of points signal of the constellation for the second data stream, and where the first data stream has a data and synchronization data to demodulate the received signal corresponding to the second data stream, the synchronization data is located at the beginning of the first data flow, and the data to be demodulated follows the synchronization data; and demodulating the received signal to produce the first data stream and the second data stream, wherein said demodulator produces the second data stream according to the data for the demodulation. 18. A signal transmission and reception method comprising a method of signal transmission and a method of receiving signals, said method of transmitting signals that transmits a first data stream and a second data stream, comprises: assigning each one of said first and second data streams to a respective constellation in a vector spatial diagram to produce modulated signals, wherein the number of signal points of the constellation for the first data stream is different from the number of signal points of the constellation for the second data stream, and to transmit the modulated signals, wherein the first data stream has a synchronization data and data for demodulating the modulated signals corresponding to the second data stream, and wherein the synchronization data is located at the beginning of the first data stream, and the demodulation data follows the synchronization data; said method of receiving signals comprises: receiving a transmitted signal to produce a received signal, demodulating the received signal to produce the first data stream and the second data stream, wherein said demodulator produces the second data stream according to the data for demodulation. 19. A signal transmission system comprising a transmitting apparatus and a receiving apparatus, said transmitting apparatus comprising: an operable modulator for modulating a data stream to produce a digital modulated signal, wherein the data stream has a plurality of frames with a frame synchronization data located at the beginning of each frame, and each frame has a plurality of data blocks that follow the frame synchronization data, and each data block has a block synchronism data located at the beginning of each block; and an operable transmitter for transmitting the digital modulated signal; said receiver apparatus comprises: a receiver operable to receive the digital modulated signal; and an operable demodulator for demodulating the received digital modulated signal to produce a demodulated signal according to the frame synchronization data and the block synchronism data. 20. A signal transmitting apparatus comprising: an operable modulator for modulating a data stream to produce a digital modulated signal, wherein the data stream has a plurality of frames with a frame synchronization data located at the beginning of each frame , and each frame has a plurality of data blocks that follow the frame synchronization data, and each data block has a block synchronism data located at the beginning of each block; Y an operable transmitter to transmit the digital modulated signal. 21. A signal receiving apparatus comprising: a receiver operable to receive the digital modulated signal, wherein the transmitted digital modulated signal includes a data stream, and wherein the data stream has a plurality of frames with a synchronization data of frame located at the beginning of each frame, and each frame has a plurality of data blocks that follow the frame synchronization data, and each block of data has a block synchronism data located at the beginning of each block; and an operable demodulator for demodulating the received digital modulated signal to produce a demodulated signal according to the frame synchronization data and the block synchronism data. 22. A signal receiving apparatus according to claim 21, further comprising: a decoder operable to decode the demodulated signal in a video signal. 23. A signal receiving apparatus according to claim 22, further comprising: an operable output terminal to take out the video signal. 2 . A signal receiving apparatus according to claim 22, further comprising: an operable deployment device for displaying the video signal. 25. A method of transmitting and receiving signals, comprising a transmission method and a reception method, said transmission method comprising: modulating a data stream to produce a digital modulated signal, wherein the data stream has a plurality of frames with a frame synchronization data located at the beginning of each frame, and each frame has a plurality of data blocks that follow the frame synchronization data, and each block of data has a block synchronism data located at the beginning of each block; and transmitting the digital modulated signal; said receiving method comprises: receiving the digital modulated signal; and demodulating the received digital modulated signal to produce a demodulated signal according to the frame synchronization data and the block synchronism data. 26. A signal transmission method comprising: modulating a data stream to produce a digital modulated signal, wherein the data stream has a plurality of frames with a frame synchronization data located at the beginning of each frame, and each frame has a plurality of data blocks that follow the frame synchronization data, and each data block has a block synchronism data located at the beginning of each block; and transmit the digital modulated signal. 27. A signal reception method comprising: receiving the digital modulated signal, wherein said digitally transmitted modulated signal includes a data stream, wherein the data stream has a plurality of frames with a frame synchronization data located at the beginning of each frame, and each frame has a plurality of data blocks that follow the frame synchronization data, and each data block has a block synchronism data located at the beginning of each block; and demodulating the received digital modulated signal to produce a demodulated signal according to the frame synchronization data and the block synchronism data. 28. A signal receiving apparatus capable of receiving a modulated signal VSB processed by digital modulation and a modulated signal QAM processed by digital modulation, which are a terrestrial transmission signal and a cable television signal, respectively, said signal receiving apparatus comprises: an operable mixer for converting the modulated signal VSB into a low frequency signal of the modulated signal VSB, and operable to convert the modulated signal QAM into a low frequency signal of the modulated signal QAM; an operable QAM demodulator for demodulating the low frequency signal of the QAM modulated signal in a demodulated QAM signal; and a VSB demodulator operable to demodulate the low frequency signal of the modulated signal VSB in a demodulated signal VSB. 29. A method of receiving signals, comprising: receiving a signal with a receiver capable of receiving a modulated VSB signal processed by digital modulation and a modulated QAM signal processed by digital modulation, which are a terrestrial transmission signal and a signal cable television, respectively; converting the modulated signal VSB into a low frequency signal of the modulated signal VSB with a mixer if the received signal is the modulated signal VSB, and demodulating the low frequency signal of the modulated signal VSB in a demodulated signal VSB; and converting the QAM modulated signal into a low frequency signal of the QAM modulated signal with the mixer if the received signal is the QAM modulated signal, and demodulating the low frequency signal of the QAM modulated signal into a demodulated QAM signal, wherein the mixer is capable of converting the modulated signal VSB into the low frequency signal of the modulated signal VSB, and converting the modulated signal PSK into the low frequency signal of the modulated signal PSK. 30. A signal receiving apparatus capable of receiving a modulated signal VSB processed by digital modulation and a modulated signal PSK processed by digital modulation, which are a terrestrial transmission signal and a cable television signal, respectively, said signal receiving apparatus comprising: an operable mixer for converting the modulated signal VSB into a low frequency signal of the modulated signal VSB, and operable to convert the PSK modulated signal into a low frequency signal of the PSK modulated signal; a PKS demodulator operable to demodulate the low frequency signal of the PSK modulated signal in a PKS demodulated signal; and a VSB demodulator operable to demodulate the low frequency signal of the modulated signal VSB in a demodulated signal VSB. 29. A signal reception method, comprising: receiving a signal with a receiver capable of receiving a modulated VSB signal processed by digital modulation and a PSK modulated signal processed by digital modulation, which are a terrestrial transmission signal and a signal cable television, respectively; converting the modulated signal VSB into a low frequency signal of the modulated signal VSB with a mixer if the received signal is the modulated signal VSB, and demodulating the low frequency signal of the modulated signal VSB in a demodulated signal VSB; and converting the PSK modulated signal into a low frequency signal of the PSK modulated signal with the mixer if the received signal is the PSK modulated signal, and demodulating the low frequency signal of the PSK modulated signal in a demodulated signal PSK, wherein the mixer is capable of converting the modulated signal VSB into the low frequency signal of the modulated signal VSB, and converting the modulated signal PSK into the low signal frequency of the PSK modulated signal. 32. A signal receiving apparatus capable of receiving a modulated PSK signal processed by digital modulation and a modulated QAM signal processed by digital modulation, which are a terrestrial transmission signal and a cable television signal, respectively, said signal receiving apparatus comprises: an operable mixer to convert the modulated signal PSK in a low frequency signal of the PSK modulated signal, and operable to convert the QAM modulated signal into a low frequency signal of the QAM modulated signal; an operable QAM demodulator for demodulating the low frequency signal of the QAM modulated signal in a demodulated QAM signal; and a PSK demodulator operable to demodulate the low frequency signal of the PSK modulated signal in a demodulated PSK signal. 33. A signal reception method, comprising: receiving a signal with a receiver capable of receiving a modulated PSK signal processed by digital modulation and a modulated QAM signal processed by digital modulation, which are a terrestrial transmission signal and a cable television signal, respectively; converting the PSK modulated signal into a low frequency signal of the PSK modulated signal with a mixer if the received signal is the PSK modulated signal, and demodulating the low frequency signal of the PSK modulated signal into a demodulated PSK signal; and converting the QAM modulated signal into a low frequency signal of the QAM modulated signal with the mixer if the received signal is the QAM modulated signal, and demodulating the low frequency signal of the QAM modulated signal into a demodulated PSK signal, wherein the mixer is capable of converting the PSK modulated signal into the low frequency signal of the PSK modulated signal, and converting the QAM modulated signal into the low frequency signal of the QAM modulated signal. 34. A signal transmitting and receiving apparatus for transmitting and receiving a modulated signal VSB having information of a first data stream and a second stream of data. data, the apparatus comprises a transmitting apparatus and a receiving apparatus, said transmitting apparatus comprising - a frame encoder operable to encode in frame to the second data stream to produce a data stream encoded in lattice; an operable modulator for modulating the first data stream, without being coded in framing, for a modulated signal VSB of level m and modulating the data stream encoded in framing to a modulated signal VSB of level n, n being an integer greater than m, wherein the first data stream has a synchronization data represented for at least one unique word; and an operable transmitter for transmitting the modulated signal VSB of level m and the modulated signal VSB of level n; said receiver apparatus comprises: a demodulator operable to demodulate the modulated signal VSB of level m for the first data stream, and demodulate the modulated signal VSB of level n for a demodulated data stream, wherein the demodulated data stream is reproduced in accordance with the synchronization data represented by at least one unique word; and an operable framing decoder for decoding the demodulated data stream for the second data stream in framing. 35. A signal transmitting apparatus for transmitting a modulated signal VSB having information of a first data stream and a second data stream, the apparatus comprises - an operable frame encoder for encoding the second data stream in a frame to produce a data flow encoded in framework; an operable modulator for modulating the first data stream, without being coded in framing, for a modulated signal VSB of level m and modulating the data stream encoded in framing to a modulated signal VSB of level n, n being an integer greater than m, wherein the first data stream has a synchronization data represented for at least one unique word; and an operable transmitter for transmitting the modulated signal VSB of level m and the modulated signal VSB of level n. 36. A signal receiving apparatus comprising: an operable receiver receiving a transmitted modulated signal VSB having information from a first data stream, which has not been encoded in framing, and a second data stream that has been encoded in framing, wherein the modulated signal VSB transmitted includes a signal modulated VSB of level m and a modulated signal VSB of level n, n being an integer greater than m, and the first data stream has synchronization data represented by at least one unique word; the demodulator operable to demodulate the modulated signal VSB of level m for the first data stream, and demodulate the modulated signal VSB of level n for a demodulated data stream, wherein the demodulated data stream is reproduced in accordance with the data of synchronization represented by at least one unique word; and an operable framing decoder for decoding the demodulated data stream for the second data stream in framing. 37. A method of transmitting and receiving signals for transmitting and receiving a modulated signal VSB having information of a first data stream and a second stream of data. data, the method comprises a transmission method and a reception method, said transmission method comprising: encoding the second data stream in a frame to produce a data stream encoded in a frame; modulating the first data stream, without being coded in framework, for a m-level VSB modulated signal, and modulating the coded data stream for a n-level VSB modulated signal, n being an integer greater than m, where the first data stream has synchronization data represented by at least one unique word; And transmit the modulated signal VSB of level m and the modulated signal VSB of level n; said receiving method comprises: demodulating the modulated signal VSB of level m for the first data stream, and demodulating the modulated signal VSB of level n for a demodulated data stream; wherein the demodulated data stream is reproduced according to the synchronization data represented by the at least one unique word; and decoding the demodulated data stream for the second data stream in lattice. 38. A method of transmitting signals to transmit a modulated signal VSB having information of a first data stream and a second data stream, said method comprises: - encoding the second data stream in a frame to produce a data stream encoded in a lattice; modulate the first data stream, without being coded in framework, for a modulated signal VSB of level m, and modulate the data stream coded in framework for a modulated signal VSB of level, n being an integer greater than m, wherein the first data stream has synchronization data represented by at least one unique word; and transmitting the modulated signal VSB of level m and the modulated signal VSB of level n. 39. A signal reception method comprising: receiving a transmitted modulated signal VSB having information from a first data stream, which has not been encoded in a frame, and a second data stream that has been encoded in a frame, where the transmitted modulated signal VSB includes a modulated signal VSB of level m and a modulated signal VSB of level n, n being an integer greater than m, and the first data stream has synchronization data represented by at least one unique word; demodulating the modulated signal VSB of level m for the first data stream having synchronization data and has not been encoded in framework, and demodulating the modulated signal VSB of level n for a demodulated data stream; wherein the demodulated data stream is reproduced according to the synchronization data represented by the at least one unique word; and decoding the demodulated data stream for the second data flow in lattice. 40. A signal receiving apparatus capable of receiving a modulated signal VSB and a modulated signal QAM, said signal receiving apparatus comprising: a QAM demodulator operable to demodulate the modulated signal QAM in a demodulated signal QAM; a VSB demodulator operable to demodulate the modulated signal VSB in a demodulated signal VSB; and an operable clock player for synchronizing in phase complete symbols of the QAM modulated signal when the received signal is the QAM modulated signal, and synchronizing in phase complete symbols of the modulated signal VSB when the received signal is the modulated signal VSB. 41. A method of receiving signals capable of receiving a modulated signal VSB and a modulated signal QAM, said method of receiving signals comprising: demodulating the modulated signal QAM in a demodulated signal QAM; demodulating the modulated signal VSB in a demodulated signal VSB; and synchronizing in phase complete symbols of the QAM modulated signal when the received signal is the modulated signal QAM, and synchronizing in phase complete symbols of the modulated signal VSB when the received signal is the modulated signal VSB. 42. A signal receiving apparatus capable of receiving a modulated signal VSB processed by a digital modulation and a modulated signal QAM processed by digital modulation, same as a terrestrial transmission signal and a cable television signal, respectively, said receiver apparatus signal comprises: a QAM demodulator operable to demodulate the QAM modulated signal in a demodulated QAM signal; a VSB demodulator operable to demodulate the modulated signal VSB in a demodulated VSB signal; and a video decoder operable to decode the demodulated signal QAM, and operable to decode the demodulated signal VSB. 43. The signal receiving apparatus according to claim 42, wherein the video decoder is an MPEG decoder. 44. A signal receiving method, comprising: receiving a signal with a receiver capable of receiving a modulated signal VSB processed by digital modulation and a modulated signal QAM processed by digital modulation, which are a terrestrial transmission signal and a signal of cable television, respectively; demodulating the QAM modulated signal in a demodulated QAM signal if the received signal is the modulated QAM signal, and decoding the demodulated QAM signal with a video decoder; and demodulating the modulated signal VSB in a demodulated signal VSB if the received signal is the modulated signal VSB, and decoding the demodulated signal VSB with the video decoder, wherein the video decoder is capable of decoding the demodulated signal VSB and the demodulated signal QAM. 45. The signal reception method according to claim 44, wherein the decoding is MPEG decoding. 46. A call receiving apparatus capable of receiving a modulated signal VSB processed by digital modulation and a modulated signal PSK processed by digital modulation, which are a terrestrial transmission signal and a cable television signal, respectively, said receiver apparatus of signals comprises: a PSK demodulator operable to demodulate the PSK modulated signal in a demodulated PSK signal; a VSB demodulator operable to demodulate the modulated signal VSB in a demodulated signal VSB; a video decoder operable to decode the demodulated signal PSK, and operable to decode the demodulated signal VSB. 47. The signal receiving apparatus according to claim 46, wherein the video decoder is an MPEG decoder. 48. A signal reception method, comprising: receiving a signal with a receiver capable of receiving a modulated signal VSB processed by digital modulation and a modulated signal PSK processed by digital modulation, which are a terrestrial transmission signal and a cable television signal, respectively; demodulating the PSK modulated signal in a demodulated signal PSK if the received signal is the PSK modulated signal, and decoding the demodulated signal PSK with a video decoder capable of decoding demodulated signals VSB and demodulated PSK signals; and demodulating the modulated signal VSB in a demodulated signal VSB if the received signal is the modulated signal VSB, and decoding the demodulated signal VSB with the decoder capable of decoding the demodulated signals VSB and the demodulated signals PSK. 49. The method of receiving signals according to claim 48, wherein the decoding is MPEG decoding. 50. A call receiving apparatus capable of receiving a modulated PSK signal processed by digital modulation and a modulated QAM signal processed by digital modulation, which are a terrestrial transmission signal and a signal of cable television, respectively, said signal receiving apparatus comprises: a QAM demodulator operable to demodulate the QAM modulated signal in a demodulated QAM signal; A PSK demodulator operable to demodulate the PSK modulated signal in a demodulated PSK signal; an operable video decoder for decoding the demodulated signal QAM, and operable to decode the demodulated signal PSK. 51. The signal receiving apparatus according to claim 50, wherein the video decoder is an MPEG decoder. 52. A signal reception method, comprising: receiving a signal with a receiver capable of receiving a modulated PSK signal processed by digital modulation and a modulated QAM signal processed by digital modulation, which are a terrestrial transmission signal and a signal cable television, respectively; demodulating the modulated QAM signal in a demodulated signal QAM if the received signal is the modulated signal QAM, and decoding the demodulated signal QAM with a video decoder capable of decoding demodulated PSK signals and demodulated QAM signals; Y demodulating the PSK modulated signal into a demodulated PSK signal if the received signal is the PSK modulated signal, and decoding the demodulated PSK signal with the decoder capable of decoding the demodulated PSK signals and the demodulated QAM signals. 53. The signal reception method according to claim 52, wherein the decoding is MPEG decoding. 54. A signal transmitting apparatus for transmitting a first data stream and a second data stream, said signal transmitting apparatus comprising: a first error correction code (ECC) encoder operable to encode by BCH the first stream of data data, to produce a first data stream encoded by ECC; a second error correction code (ECC) encoder operable to encode by Reed-Solomon the second data stream, to produce a second data stream encoded by ECC; an operable modulator for modulating the first data stream encoded by ECC according to a m-level PSK, and for modulating the second data stream encoded by ECC of according to a n-level PSK to produce modulated signals; an inverse Fast Fourier transformer (IFFT) operable to convert the modulated signals into signals converted by the IFFT; and an operable transmitter for transmitting the signals converted by the IFFT. 55. A signal transmitting apparatus according to claim 54, wherein m is less than or equal to 4. 56. A signal transmitting apparatus according to claim 54, wherein n is greater than or equal to 4. 57. A signal transmitting apparatus according to claim 54, wherein m is less than or equal to 4 and n is greater than or equal to 4. 58. A signal transmitting apparatus for transmitting a first data stream and a second data stream, said signal transmission apparatus comprises: a first error correction code (ECC) encoder operable to encode by BCH the first data stream, to produce a first data stream encoded by ECC; a second error correction code (ECC) encoder operable to encode by Reed-Solomon the second data stream, to produce a second data stream encoded by ECC; an operable modulator for modulating the first ECC-encoded data stream in accordance with a m-level QAM, and for modulating the second ECC-encoded data stream in accordance with a n-level QAM to produce modulated signals; an inverse Fast Fourier transformer (IFFT) operable to convert the modulated signals into signals converted by the IFFT; and an operable transmitter for transmitting the signals converted by the IFFT. 59. A signal transmitting apparatus according to claim 58, wherein m is less than or equal to 4. 60. A signal transmitting apparatus according to claim 58, wherein n is greater than or equal to 4. 61. A signal transmitting apparatus according to claim 58, wherein m is less than or equal to 4 and n is greater than or equal to 4. 62. A signal receiving apparatus comprising: a Fast Fourier Transformer (FFT) operable to convert a input signal in a signal converted by FFT; wherein the input signal has information of a first data stream and a second data stream, both encoded by ECC, said first data stream encoded by ECC is modulated according to a m-level PSK, said second data stream encoded by ECC is modulated according to a PSK of level n; an operable demodulator for demodulating the converted FFT signal to produce a first demodulated data stream and a second demodulated data stream; a first error correction code decoder (ECC) operable to decode by BCH the first demodulated data stream, to produce a first data stream; a second error correction code decoder (ECC) operable to decode by Reed-Solomon the second demodulated data stream, to produce the second data stream. 63. A signal transmitting apparatus according to claim 62, wherein m is less than or equal to 4. 64. A signal transmitting apparatus according to claim 62, wherein n is greater than or equal to. 65. A signal transmitting apparatus according to claim 62, wherein m is less than or equal to 4 and n is greater than or equal to 4. 66. A signal receiving apparatus comprising: a Fast Fourier Transformer (FFT) operable to convert a input signal in a signal converted by FFT; wherein the input signal has information of a first-data stream and a second data stream, both encoded by ECC, said first data stream encoded by ECC is modulated according to a QAM of level m, said second stream of Data encoded by ECC is modulated according to a QAM of level n; an operable demodulator for demodulating the converted FFT signal to produce a first demodulated data stream and a second demodulated data stream; a first error correction code decoder (ECC) operable to decode by BCH the first demodulated data stream, to produce a first data stream; a second error correction code decoder (ECC) operable to decode by Reed-Solomon the second demodulated data stream, to produce the second data stream. 67. A signal transmitting apparatus according to claim 66, wherein m is less than or equal to 4. 68. A signal transmitting apparatus according to claim 66, wherein n is greater than or equal to 4. 69. A signal transmitting apparatus according to claim 66, wherein m is less than or equal to 4 and n is greater than or equal to 4. 70. A signal transmission system comprising a signal transmitting apparatus and a signal receiving apparatus. said signal transmitting apparatus comprises: a first error correction code (ECC) encoder operable to encode by BCH the first data stream, to produce a first data stream encoded by ECC; a second error correction code (ECC) encoder operable to encode by Reed-Solomon the second data stream, to produce a second data stream encoded by ECC; an operable modulator for modulating the first data stream encoded by ECC according to a PSK of level m, and for modulating the second data stream encoded by ECC according to a PS of level n to produce modulated signals; an inverse Fast Fourier transformer (IFFT) operable to convert the modulated signals into signals converted by the IFFT; and an operable transmitter for transmitting the signals converted by the IFFT; the signal receiving apparatus comprises: a Fast Fourier Transformer (FFT) operable to convert the converted IFFT signals transmitted into a signal converted by FFT; an operable demodulator for demodulating the converted FFT signal to produce a first demodulated data stream and a second demodulated data stream; a first error correction code decoder (ECC) operable to decode by BCH the first demodulated data stream, to produce a first data stream, - a second error correction code decoder (ECC) operable to decode by Reed -Solomon the second demodulated data stream, to produce the second data stream. 71. A signal transmitting system according to claim 70, wherein m is less than or equal to 4. 72. A signal transmitting system according to claim 70, wherein n is greater than or equal to 4. 73. A system signal transmitter according to claim 70, wherein m is less than or equal to 4 and n is greater than or equal to 4. 74. A signal transmission system comprising a signal transmitting apparatus and a signal receiving apparatus, said signal transmitting apparatus comprises: a first error correction code (ECC) encoder operable to encode by BCH the first data stream, to produce a first data stream encoded by ECC; a second error correction code (ECC) encoder operable to encode by Reed-Solomon the second data stream, to produce a second data stream encoded by ECC; an operable modulator for modulating the first data stream encoded by ECC according to a QAM of level m, and for modulating the second data stream encoded by ECC of according to a n-level QAM to produce modulated signals; an inverse Fast Fourier transformer (IFFT) operable to convert the modulated signals into signals converted by the IFFT; and an operable transmitter for transmitting the signals converted by the IFFT; said signal receiving apparatus comprises: a Fast Fourier Transformer (FFT) operable to convert the signals converted by IFFT transmitted into a signal converted by FFT; an operable demodulator for demodulating the converted FFT signal to produce a first demodulated data stream and a second demodulated data stream; a first error correction code decoder (ECC) operable to decode by BCH the first demodulated data stream, to produce a first data stream; a second error correction code decoder (ECC) operable to decode by Reed-Solomon the second demodulated data stream, to produce the second data stream. 75. A signal transmitting system according to claim 74, wherein m is less than or equal to 4. 76. A signal transmitting system according to claim 74, wherein n is greater than or equal to 4. 77. A system signal transmitter according to claim 74, wherein m is less than or equal to 4 and n is greater than or equal to 4. 78. A method of transmitting signals for transmitting a first data stream and a second data stream, said method comprises: coding by code (ECC) of error correction BCH the first data stream to produce a first data stream encoded by ECC; code by code (ECC) Reed-Solomon error correction the second data stream to produce a second data stream encoded by ECC; modulating the first ECC-encoded data stream in accordance with a m-level PSK and modulating the second ECC-encoded data stream according to a n-level PSK to produce modulated signals; convert the modulated signals into a signal converted by IFFT; and transmit the signal converted by IFFT. 79. A method of transmitting signals according to claim 78, wherein m is less than or equal to 4. 80. A signal transmission method according to claim 78, wherein n is greater than or equal to 4. 81. A method of transmitting signals according to claim 78, wherein m is less than or equal to 4 and n is greater than or equal to 4. 82. A signal transmission method for transmitting a first data stream and a second stream of data. data, said method comprises: coding by code (ECC) of error correction BCH the first data stream to produce a first data stream encoded by ECC; code by code (ECC) Reed-Solomon error correction the second data stream to produce a second data stream encoded by ECC; modulating the first ECC-encoded data stream in accordance with a m-level QAM and modulating the second ECC-encoded data stream according to a n-level QAM to produce modulated signals; convert the modulated signals into a signal converted by IFFT; and transmit the signal converted by IFFT. 83. A signal transmission method according to claim 82, wherein m is less than or equal to 4. 84. A signal transmission method according to claim 82, wherein n is greater than or equal to 4. 85. A method of transmitting signals according to claim 82, wherein m is less than or equal to 4 and n is greater than or equal to 4. 86. A signal reception method comprising: converting an input signal into a converted signal by FFT; wherein the input signal has information of a first data stream and a second data stream, both being encoded by ECC, the first data stream encoded by ECC is modulated according to a PSK of level m, the second stream of data Data encoded by ECC is modulated according to a PSK of level n; demodulating the signal converted by FFT to produce a first demodulated data stream and a second demodulated data stream; decode by error correction code (ECC) BCH the first data stream demodulated to produce the first data stream; Y decoding by code (ECC) Reed-Solomon error correction the second data stream demodulated to produce the second data stream. 87. A method of receiving signals according to claim 86, wherein m is less than or equal to 4. 88. A method of receiving signals according to claim 86, wherein n is greater than or equal to 4 » 89. A method of receiving signals according to claim 86, wherein m is less than or equal to 4 and n is greater than or equal to 4. 90. A signal reception method comprising: converting an input signal into a signal converted by FFT; wherein the input signal has information of a first data stream and a second data stream, both being encoded by ECC, the first data stream encoded by ECC is modulated according to a QAM of level m, the second stream of Data encoded by ECC is modulated according to a QAM of level n; demodulating the signal converted by FFT to produce a first demodulated data stream and a second demodulated data stream; decoding by BCH error correction code (ECC) the first demodulated data stream to produce the first data stream; and decoding by Reed-Solomon error correction code (ECC) the second data stream demodulated to produce the second data stream. 91. A method of receiving signals according to claim 90, wherein m is less than or equal to 4.) 92. A method of receiving signals according to claim 90, wherein n is greater than or equal to 4 93. A signal reception method according to claim 90, wherein m is less than or equal to 4 and n is greater than or equal to 4. 94. A signal transmission and reception method comprising a method of transmitting signals. signals and a method of receiving signals, said signal transmission method comprising: coding by code (ECC) of error correction BCH the first data stream to produce a first data stream encoded by ECC; code by code (ECC) error correction Reed-Solomon the second data stream to produce a second data stream encoded by ECC; modulating the first ECC-encoded data stream in accordance with a m-level PSK and modulating the second ECC-encoded data stream according to a n-level PSK to produce modulated signals; convert the modulated signals into a signal converted by IFFT; and transmitting the signal converted by IFFT said method of receiving signals comprises: converting the converted signal by IFFT transmitted into a signal converted by FFT; demodulating the signal converted by FFT to produce a first demodulated data stream and a second demodulated data stream; decoding by BCH error correction code (ECC) the first demodulated data stream to produce the first data stream; and decoding by Reed-Solomon error correction code (ECC) the second data stream demodulated to produce the second data stream. 95. A signal transmission and reception method according to claim 94, wherein m is less than or equal to 96. A method of transmitting and receiving signals according to claim 94, wherein n is greater than or equal to 4. 97. A method of transmitting and receiving signals according to claim 94, wherein m is less than or equal to 4 and n is greater than or equal to 4. 98. A signal transmission and reception method comprising a method of signal transmission and a method of receiving signals, said signal transmission method comprising: coding by code (ECC) of BCH error correction the first data stream to produce a first data stream encoded by ECC; code by code (ECC) Reed-Solomon error correction the second data stream to produce a second data stream encoded by ECC; modulating the first ECC-encoded data stream in accordance with a m-level QAM and modulating the second ECC-encoded data stream according to a n-level QAM to produce modulated signals; convert the modulated signals into a signal converted by IFFT; and transmit the signal converted by IFFT; said method of receiving signals comprises: converting the converted signal by IFFT transmitted into a signal converted by FFT; demodulating the signal converted by FFT to produce a first demodulated data stream and a second demodulated data stream; decoding by BCH error correction code (ECC) the first demodulated data stream to produce the first data stream; and decoding by error correction code (ECC) Reed-Solomon the second data stream demodulated to produce the second data stream. 99. A method of transmitting and receiving signals according to claim 98, wherein m is less than or equal to 4. 100. A method of transmitting and receiving signals according to claim 98, wherein n is greater or equal to 4. 101. A signal transmission and reception method according to claim 98, wherein m is less than or equal to 4 and n is greater than or equal to 4. 102. A signal transmitting apparatus for transmitting a plurality of signals. data flows, which includes at least one first data stream and a second data stream, said signal transmitting apparatus comprising - a modulator VSB operable to modulate the first data stream in a modulated signal VSB of level n and the second data stream in a modulated signal VSB of level 8, where en is an integer and n is less than 8, and an operable transmitter for transmitting the modulated signal VSB of level n and the modulated signal VSB of level 8 under a condition where the transmission power of the modulated signal VSB of level n is greater than the transmission power of the level 8 VSB modulated signal. 103. A signal receiving apparatus for reconstructing a plurality of data streams, including at least a first data stream and a second data stream, said apparatus signal receiver comprises: a receiving unit operable to receive a modulated signal VSB of level n and a modulated signal VSB of level 8 under a condition where the transmission power of the signal modulated VSB d level n is greater than the transmission power of the level 8 VSB modulated signal, and a VSB demodulator operable to demodulate the VSB modulated signal of level n in the first data stream and demodulating the level 8 modulated signal VSB in the second data stream, where n is an integer and n is less than 8. 104. A signal transmission and reception system comprising: a signal transmission apparatus operable to transmit a signal plurality of data streams, including at least a first data stream and a second data stream, said signal transmitting apparatus comprises: a VSB modulator operable to modulate the first data stream in a n-level VSB modulated signal and the second data stream in a VSB modulated signal of level 8, where en is an integer and n is less than 8, and an operable transmitter to transmit the modulated signal VSB of level n and the modulated signal VSB of level 8 under a condition where the power Transmission of the VSB modulated signal of level n is greater than the transmit power of the level 8 VSB modulated signal; and a signal receiving apparatus for reconstructing the plurality of data streams, including at least a first data stream and a second data stream, said signal receiving apparatus comprises: a receiving unit operable to receive the modulated signal VSB of level n and the modulated signal VSB of level 8 under a condition where the transmission power of the modulated signal VSB of level n is greater than the transmission power of the modulated signal VSB of level 8, and a VSB demodulator operable to demodulate the modulated signal VSB of level n in the first data stream and demodulate the modulated signal VSB of level 8 in the second data stream, where n is an integer and n is less than 8 105. A signal transmission method for transmitting a plurality of data streams, including at least a first data stream and a second data stream, said signal transmission method comprises: modulating the first stream of data in one modulated signal VSB of level n and the second data stream in a modulated signal VSB of level 8, where n is an integer and n is less than 8, and transmit the modulated signal VSB of level n and the modulated signal VSB of level 8 under a condition where the transmit power of the VSB modulated signal of level n is greater than the transmit power of the level 8 VSB modulated signal. 106. A signal receiving method for reconstructing a plurality of data streams, including at least a first data stream and a second data stream, said method of receiving signals comprises: receiving a modulated signal VSB of level n and a modulated signal Level 8 VSB under a condition where the transmit power of the modulated signal VSB of level n is greater than the transmit power of the modulated signal VSB of level 8, and demodulate the modulated signal VSB of level n in the first stream of data and demodulating the level 8 VSB modulated signal in the second data stream, where n is an integer and n is less than 8. 107. A signal transmission and reception method comprising: a method of transmitting signals to transmit a plurality of data streams, including at least a first data stream and a second data stream, said method of transmitting signals comprises: modulating the first data stream in a forward signal; d) VSB of level n and the second data stream in a level 8 VSB modulated signal, where n is an integer and n is less than 8, and transmitting the modulated signal VSB of level n and the modulated signal VSB of level 8 under a condition where the transmission power of the modulated signal VSB of level n is greater than the transmission power of the modulated signal VSB of level 8, and a method of receiving signals for reconstructing a plurality of data streams, including at least a first data stream and a second data stream, said method of receiving signals comprises: receiving a modulated signal VSB of level n and a modulated signal VSB of level 8 under a condition where the transmit power of the modulated signal VSB of level n is greater than the transmission power of the modulated signal VSB of level 8, and demodulate the modulated signal VSB of level n in the first data stream and demodulating the level 8 VSB modulated signal in the second data stream, where n is an integer and n is less than 8. 108. A signal transmitting apparatus for transmitting a plurality of data streams, which includes at least a first data stream and a second data stream, said signal transmitting apparatus comprising: an operable ASK modulator for modulating the first data stream in a n-level ASK modulated signal and the second data stream in a level 8 ASK modulated signal, where n is an integer and n is less than 8, an operable filter for filtering the n-level ASK modulated signal and the level 8 ASK modulated signal to produce a n-level VSB modulated signal and a level 8 VSB modulated signal; and an operable transmitter for transmitting the modulated signal VSB of level n and the modulated signal VSB of level 8 under a condition where the transmission power of the modulated signal VSB of level n is greater than the transmission power of the modulated signal VSB of level 8. 109. A signal receiving apparatus for reconstructing a plurality of data streams, which includes at least a first data stream and a second data stream, said signal receiving apparatus comprises: a receiving unit operable to receive a modulated signal VSB of level n and a modulated signal VSB of level 8 under a condition where the power of transmission of the modulated signal VSB of level n is greater than the power of transmission of the modulated signal VSB of level 8, an operable filter for filtering the modulated signal VSB of level n and the modulated signal VSB of level 8, and a demodulator VSB operable to demodulate the modulated signal VSB of level n filtered in the first data stream and demodulate the modulated signal VSB of level 8 filtered in the second data stream, where n is an integer and n is less than 8. 110. A signal transmission and reception system comprising: a signal transmitting apparatus operable to transmit a plurality of data streams, including at least a first data stream and a second data stream, said signal transmitting apparatus comprises: an ASK modulator operable to modulate the first data stream in a n-level ASK modulated signal and the second data stream in an ASK modulated signal of level 8, where n is an integer and n is less than 8, an operable filter to filter the n-level ASK modulated signal and the 8-level ASK modulated signal to produce a VSB modulated signal e level n and a level 8 VSB modulated signal; and an operable transmitter for transmitting the modulated signal VSB of level n and the modulated signal VSB of level 8 under a condition where the transmit power of the modulated signal VSB of level n is greater than the transmission power of the modulated signal VSB of level 8; and a signal receiving apparatus operable to reconstruct a plurality of data streams, including at least a first data stream and a second data stream, said signal receiving apparatus comprising: a receiving unit operable to receive a VSB modulated signal level n and a level 8 VSB modulated signal under a condition where the transmission power of the level-modulated signal VSB is greater than the transmission power of the level-8 VSB modulated signal, an operable filter for filtering the modulated signal Level n VSB and the level 8 VSB modulated signal, and a VSB demodulator operable to demodulate the modulated signal level VSB filtered in the first data stream and demodulate the level 8 modulated VSB signal filtered in the second data stream, wherein n is an integer and n is less than 8. 111. A method of transmitting signals to transmit a plurality of data streams, including at least one first data stream and n second data flow, said signal transmission method comprises: modulate the first data stream in a n-level ASK modulated signal and the second data stream in a level 8 ASK modulated signal, where n is an integer and n is less than 8, filter the n-level ASK modulated signal and the signal modulated ASK of level 8 to produce a modulated signal VSB of level n and a modulated signal VSB of level 8; and transmitting the modulated signal VSB of level n and the modulated signal VSB of level 8 under a condition where the transmission power of the modulated signal VSB of level n is greater than the transmission power of the modulated signal VSB of level 8. 112. A signal receiving method for reconstructing a plurality of data streams, including at least a first data stream and a second data stream, said method of receiving signals comprises: receiving a modulated signal VSB of level n and a modulated signal VSB of level 8 under a condition where the transmit power of the modulated signal VSB of level n is greater than the transmit power of the modulated signal VSB of level 8, filter the modulated signal VSB of level n and the modulated signal VSB of level 8, and demodulating the modulated signal VSB of level n filtered in the first data stream and demodulating the modulated signal VSB level 8 filtered in the second data stream, where n is an integer and n is less than 8. 113. A signal transmission and reception method comprising: a method of transmitting signals to transmit a plurality of data streams , which includes at least a first data stream and a second data stream, said signal transmission method comprises: assigning the first data stream to a n-level ASK modulated signal and the second data stream to an ASK modulated signal of level 8, where n is an integer and n is less than 8, filter the n-level ASK modulated signal and the 8-level ASK modulated signal to produce a n-level VSB modulated signal and an 8-level VSB modulated signal; and transmitting the modulated signal VSB of level n and the modulated signal VSB of level 8 under a condition where the transmission power of the modulated signal VSB of level n is greater than the transmission power of the modulated signal VSB of level 8; and a signal receiving method for reconstructing a plurality of data streams, including at least one first data stream and a second data stream, said method of receiving signals comprises: receiving the modulated signal VSB of level n and the modulated signal VSB of level 8 under a condition where the transmission power of the modulated signal VSB of level n is greater than the transmit power of the level 8 VSB modulated signal, filtering the received level-modulated VSB signal n and the received level 8 modulated signal VSB, and demodulating the filtered n-level VSB signal filtered in the first data stream and demodulating the level 8 modulated signal VSB filtered in the second data stream, where n is an integer and n is less than 8. 114. A signal transmission apparatus comprising: an operable modulator for assigning a first data stream to a respective constellation in a vector spatial diagram to produce a modulated signal, an operable converter for converting the modulated signal into a converted signal, having an effective symbol part and an i guard interval, according to the Orthogonal Frequency Division Multiplexing, - and an operable transmitter to transmit the converted signal; wherein the effective symbol part is selected to have a predetermined period of time. 115. A signal receiving apparatus, comprising: an operable converter for converting a received signal, having an effective symbol part and a guard interval, into a signal converted in accordance with the Orthogonal Frequency Division Multiplexing, the symbol part effective being selected to have a predetermined period of time; the received signal has information from a data stream, wherein the data stream is assigned to a respective constellation in a vector spatial diagram, and an operable demodulator to demodulate the converted signal to produce the data stream. 116. A signal transmission system comprising: a signal transmitting apparatus comprising: - an operable modulator for assigning a data stream to a respective constellation in a vector spatial diagram to produce a modulated signal, - a frequency converter -optional time to convert the modulated signal into a frequency-time converted signal into a frequency-time, which has a symbol part effective and a guard interval, according to the Orthogonal Frequency Division Multiplexing, and - an operable transmitter for transmitting the converted frequency-time signal; and a signal receiving apparatus comprising: - an operable frequency-time converter for converting the converted frequency-time signal into a time-frequency converted signal in frequency-time, according to the Orthogonal Frequency Division Multiplexing, and an operable demodulator for demodulating the converted time-frequency signal to produce a data stream, wherein the effective symbol part is selected to have a predetermined time period. 117.A method of transmitting signals comprising: assigning a data stream to a respective constellation in a vector spatial diagram to produce a modulated signal, converting the modulated signal into a converted signal having an effective symbol part and a guard interval, according to Orthogonal Frequency Division Multiplexing, and - transmit the converted signal, wherein the effective symbol part is selected to have a predetermined period of time. 118.A method of receiving signals comprising: converting a received signal, having an effective symbol part and a time slot, into a signal converted in accordance with the Orthogonal Frequency Division Multiplexing, the effective symbol part being selected to have a predetermined period of time, the received signal has information from a data stream, where the data stream is assigned to a respective constellation in a vector spatial diagram, and -demodulate the converted signal to produce a data stream . 119.A method of signal transmission and reception comprising: assigning a data stream to a respective constellation in a vector spatial diagram to produce a modulated signal, -converting in frequency-time the modulated signal in a converted frequency-time signal having an effective symbol part and a guard interval, according to the Orthogonal Frequency Division Multiplexing, -transmitting the converted frequency-time signal, -converting in time-frequency the signal converted into frequency-time into a signal converted into time-frequency according to the Orthogonal Frequency Division Multiplexing, and -desmodulating the converted time-frequency signal to produce the data flow, - wherein the effective symbol part is selected to have a predetermined period of time. 120. A signal transmission apparatus according to claim 114, wherein the converter is a Fast Fourier Transformer. 121. A signal transmission apparatus according to claim 115, wherein the converter is a Fast Fourier Transformer. 122. A signal transmission system according to claim 116, wherein the frequency-time converter is a Fast Fourier Transformer, and the time-frequency converter is a Fast Fourier Transformer. 123. A signal transmission apparatus comprising: an operable modulator for assigning a first data stream to a respective constellation in a vector spatial diagram to produce a modulated signal, an operable converter for converting the modulated signal into a converted signal, having an effective symbol part and a guard interval, according to the Orthogonal Frequency Division Multiplexing; and an operable transmitter for transmitting the converted signal; wherein the guard interval is selected to have a predetermined time period. 124. A signal receiving apparatus, comprising: an operable converter for converting a received signal, having an effective symbol part and a guard interval, into a signal converted in accordance with the Orthogonal Frequency Division Multiplexing, the guard interval being selected to have a predetermined period of time; the received signal has information from a data stream, wherein the data stream is assigned to a respective constellation in a vector spatial diagram, and an operable demodulator to demodulate the converted signal to produce the data stream. 125. A signal transmission system comprising: a signal transmitting apparatus comprising: an operable modulator for assigning a data stream to a respective constellation in a vector spatial diagram to produce a modulated signal, an operable frequency-time converter for converting the modulated signal into a frequency-time converted signal in frequency-time, having an effective symbol part and a guard interval, according to the Orthogonal Frequency Division Multiplexing, and an operable transmitter for transmitting the converted frequency-time signal; and a signal receiving apparatus comprising: an operable frequency-time converter for converting the converted frequency-time signal into a time-frequency converted signal in frequency-time, in accordance with Orthogonal Frequency Division Multiplexing, and an operable demodulator for demodulating the converted time-frequency signal to produce a data stream, wherein the guard interval is selected to have a predetermined time period. 126. A signal transmission method comprising: allocating a data stream to a respective constellation in a vector spatial diagram to produce a modulated signal, converting the modulated signal into a converted signal having an effective symbol part and a guard interval, according to the Orthogonal Frequency Division Multiplexing , and transmit the converted signal, wherein the guard interval is selected to have a predetermined time period. 127. A signal reception method comprising: converting a received signal, having an effective symbol part and a time slot, into a signal converted in accordance with Orthogonal Frequency Division Multiplexing, the guard interval being selected to have a predetermined period of time, the received signal has information from a data stream, wherein the data stream is assigned to a respective constellation in a vector spatial diagram, and demodulate the converted signal to produce a data stream. 128. A signal transmission and reception method comprising: allocating a data stream to a respective constellation in a vector spatial diagram to produce a modulated signal, converting in frequency-time the modulated signal into a converted frequency-time signal having an effective symbol part and a guard interval, in accordance with Orthogonal Frequency Division Multiplexing, transmitting the converted frequency-time signal, converting in time-frequency the signal converted into frequency-time into a signal converted into time-frequency according to the Orthogonal Frequency Division Multiplexing, and demodulating the converted time-frequency signal to produce the data stream, wherein the guard interval is selected to have a predetermined time period. 129. A signal transmission apparatus according to claim 123, wherein the converter is a Fast Fourier Transformer. 130. A signal transmission apparatus according to claim 124, wherein the converter is a Fast Fourier Transformer. 131. A signal transmission system according to claim 125, wherein the frequency-time converter is a Fast Fourier Transformer, and the time-frequency converter is a Fast Fourier Transformer. 132. A signal transmitting and receiving apparatus for transmitting and receiving a modulated signal VSB having information of a first data stream and a second data stream, the apparatus comprises a transmitting apparatus and a receiving apparatus, said transmitting apparatus comprising: operable interleaver to interleave the second data stream to produce an interleaved data stream; an operable modulator for modulating the first data stream, without being interleaved, into a modulated signal VSB of level m and modulating the data stream interleaved into a modulated signal VSB of level n, n being an integer greater than m, wherein the first data flow has a synchronization data; and an operable transmitter for transmitting the modulated signal VSB of level m and the modulated signal VSB of level n; said receiver apparatus comprises: an operable demodulator for demodulating the modulated signal VSB of level m to the first data stream and demodulating the modulated signal VSB of level n to a demodulated data stream, wherein the demodulated data stream is reproduced according to the synchronization data; and - an operable deinterleaver for deinterleaving the demodulated data stream to the second data stream. 133. A signal transmitting apparatus for transmitting a modulated signal VSB having information of a first data stream and a second data stream, the apparatus comprises: an operable interleaver for interleaving the second data stream to produce an interleaved data stream; an operable modulator for modulating the first data stream, without being interleaved, into a modulated signal VSB of level m and modulating the data stream interleaved into a modulated signal VSB of level n, n being an integer greater than m, wherein the first data flow has a synchronization data; and an operable transmitter for transmitting the modulated signal VSB of level m and the modulated signal VSB of level n. 134. A signal receiving apparatus comprising: a receiver operable to receive a transmitted VSB modulated signal, wherein said transmitted modulated signal VSB includes a modulated signal VSB of level m and a modulated signal VSB of level n, n being an integer greater than m; an operable demodulator for demodulating the modulated signal VSB of level ma a first data stream having a synchronization data, and demodulating the modulated signal VSB of level n a demodulated data stream, the first data stream without being interleaved and the flow demodulated data being interleaved, wherein the demodulated data stream is reproduced according to the synchronization data; and an operable deinterleaver for deinterleaving the demodulated data stream in a second data stream. 135. A method of transmitting and receiving signals for transmitting and receiving a VSB modulated signal having information of a first data stream and a second data stream, the method comprising a transmission method and a reception method, said method of transmission comprises: interleaving the second data stream to produce an interleaved data stream; modulate the first data flow, without being interleaved, into a m-level VSB modulated signal and modulate the flow of data interleaved in a modulated signal VSB of level n, n being an integer greater than m, wherein the first data stream has a synchronization data; and - transmitting the modulated signal VSB of level m and the modulated signal VSB of level n; said receiving method comprises: demodulating the modulated signal VSB of level m to the first data stream and demodulating the modulated signal VSB of level n a demodulated data stream, wherein the data stream demodulated is reproduced according to the synchronization data; and deinterleaving the data stream demodulated to the second data stream. 136. A method of transmitting signals to transmit a VSB modulated signal having information of a first data stream and a second data stream, the method comprising: interleaving the second data stream to produce an interleaved data stream; modulate the first data flow, without being interleaved, into a m-level VSB modulated signal and modulate the flow of data interleaved in a modulated signal VSB of level n, n being an integer greater than m, wherein the first data stream has a synchronization data; and transmitting the modulated signal VSB of level m and the modulated signal VSB of level n. 137. A method of receiving signals comprising: receiving a transmitted modulated signal VSB, wherein said transmitted modulated signal VSB includes a modulated signal VSB of level m and a modulated signal VSB of level n, n being an integer greater than m; demodulating the modulated signal VSB of level ma a first data stream having a synchronization data, and demodulating the modulated signal VSB of level n a demodulated data stream, the first data stream without being interleaved and the data stream demodulated being interleaved, wherein the demodulated data stream is reproduced according to the synchronization data; and deinterleaving the data stream demodulated in a second data stream. 138. A signal transmitting and receiving apparatus for transmitting and receiving a VSB modulated signal having information of a first data stream and a second data stream, the apparatus comprises a transmitter apparatus and a receiver apparatus, said transmitter apparatus comprising: an operable interleaver for interleaving the second data stream to produce an interleaved data stream, - a operable modulator for modulating the first data stream, without being interleaved, into a modulated signal VSB of level m and modulating the data stream interleaved into a modulated signal VSB of level n, n being an integer greater than m, wherein the first flow of data has information that represents the value of n; and an operable transmitter for transmitting the modulated signal VSB of level m and the modulated signal VSB of level n; said receiver apparatus comprises: a demodulator operable to demodulate the modulated signal VSB of level m to the first data stream and demodulate the modulated signal VSB of level n a demodulated data stream, wherein the demodulated data stream is reproduced in accordance with the information that represents the value of n; and an operable deinterleaver for deinterleaving the data stream demodulated to the second data stream. 139. A signal transmitting apparatus for transmitting a modulated signal VSB having information of a first data stream and a second data stream, the apparatus comprises: an operable interleaver for interleaving the second data stream to produce an interleaved data stream; an operable modulator for modulating the first data stream, without being interleaved, into a modulated signal VSB of level m and modulating the data stream interleaved into a modulated signal VSB of level n, n being an integer greater than m, wherein the first data flow has information that represents the value of n; and an operable transmitter for transmitting the modulated signal VSB of level m and the modulated signal VSB of level n. 140. A signal receiving apparatus comprising: a receiver operable to receive a transmitted modulated signal VSB, wherein said transmitted modulated signal VSB includes a modulated signal VSB of level m and a modulated signal VSB of level n, n being a whole greater than m; an operable demodulator for demodulating the modulated signal VSB of level m to a first data stream having the information representing the value of n, and demodulating the modulated signal VSB of level n to a demodulated data stream, the first data stream without being interleaved and the demodulated data stream being interleaved, wherein the demodulated data stream is reproduced according to the information representing the value of n; and an operable deinterleaver for deinterleaving the demodulated data stream in a second data stream. 141. A method of transmitting and receiving signals for transmitting and receiving a VSB modulated signal having information of a first data stream and a second data stream, the method comprising a transmission method and a reception method, said method of transmission comprises: interleaving the second data stream to produce an interleaved data stream; modulating the first data stream, without being interleaved, into a m-level VSB modulated signal modulating the data stream interleaved into a modulated signal VSB of level n, n being an integer greater than m, where the first data stream has information that represents the value of n; and transmitting the modulated signal VSB of level m and the modulated signal VSB of level n; said receiving method comprises: demodulating the modulated signal VSB of level m to the first data stream and demodulating the modulated signal VSB of level n a demodulated data stream, wherein the demodulated data stream is reproduced in accordance with the information it represents the value of n; and deinterleaving the data stream demodulated to the second data stream. 142. A method of transmitting signals for transmitting a modulated signal VSB having information of a first data stream and a second data stream, the method comprising: interleaving the second data stream to produce an interleaved data stream; modulating the first data stream, without being interleaved, into a m-level VSB modulated signal modulating the data stream interleaved into a modulated signal VSB of level n, n being an integer greater than m, where the first data stream has information that represents the value of n; and transmitting the modulated signal VSB of level m and the modulated signal VSB of level n. 143. A signal reception method comprising: receiving a transmitted modulated signal VSB, wherein said transmitted modulated signal VSB includes a modulated signal VSB of level m and a modulated signal VSB of level n, n being an integer greater than m; - demodulating the modulated signal VSB of level ma a first data stream having information representing the value of n, and demodulating the modulated signal VSB of level n a demodulated data stream, the first data stream without being interleaved and the flow demodulated data being interleaved, wherein the demodulated data stream is reproduced according to the information representing the value of n; and deinterleaving the data stream demodulated in a second data stream.