KR910007204B1 - Television signal processing apparatus - Google Patents

Abstract

No content.

Description

TV signal processor

1 is a block diagram of a television signal processing apparatus in a transmission shaft of an embodiment of the present invention.

2 and 3 are block diagrams showing one embodiment of an internal configuration of the signal generator of FIG.

4 is a block diagram of a television signal processing apparatus at a receiving side of an embodiment of the present invention.

5, 6, 7, 8, 9, 10, and 11 are block diagrams showing the internal structure of the signal processing circuit 111 of FIG.

Figure 12 (a) shows the spectrum of the residual sideband amplitude modulated television signal in the current television system.

FIG. 12B is a spectrum of a band limited signal modulated by a signal other than the signal shown in FIG. 12A as an example of the prior art.

FIG. 12 (c) is a spectrum showing the multiplication generated between the signal of FIG. 12 (b) and the signal of FIG. 12 (a).

13 is a signal waveform diagram showing a process of signal processing in the form of time-base compression and time-base extension.

FIG. 14 is a diagram showing the signal waveform of FIG. 13 as a spectrum. FIG.

* Explanation of symbols for main parts of the drawings

(1): Signal generator (3): Amplitude modulator

(4): first filter (5): adder

(6): oscillator (7): ideal phase

(9) Modulator 10: Second filter

12.transmitter

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television signal processing apparatus which is compatible with the current television system and transmits a video signal having an aspect ratio different from that of the current television system.

Color television stations under the current NTSC (National Television System Committe) system in Japan have been around for 20 years since their launch in 1960. Meanwhile, various new TV systems have been proposed in response to the demand for high-definition picture and improved performance of television receivers. It became. In addition, the contents of the broadcast TV program has been changed from a simple studio program or a relay program to a program that provides a high-quality image that makes a real sense of reality, such as a cinema-size broadcast of a theater.

The contents of the current television broadcasting are as follows. Number of scanning lines: 525, interlaced scanning, luminance signal horizontal bandwidth: 4.2 MHz, aspect ratio: 4: 3 (Note: Broadcasting Technology Publications, "KTV", published by the Japan Broadcasting Association (NHK) 1961.) The size of the movie screen is cut to both sizes of the screen so as to match the 4: 3 aspect ratio of the current television set, or an invalid screen is provided on the upper and lower regions of the water surface to match the aspect ratio of the effective screen area to the movie value.

As described above, under the current broadcasting method, when broadcasting a screen giving a sense of reality, a part of the screen must be cut off or the screen area must be reduced, thus failing to convey the full intention of the producer, and simply output a signal having an aspect ratio greater than 4: 3. Transmission does not receive the signal in the usual way with a conventional TV set. In order to obtain the same horizontal resolution at the same number of scan lines and frame frequency as the current broadcasting method, an image bandwidth of m / 4 times larger than the current aspect ratio is required for an aspect ratio of m: 3 (m is a real number of 4 or more). Given the efficient use of resources, it is impossible to expand the transmission band in a disordered way.

There are a number of ways in which aspect ratios can be extended while maintaining compatibility with current television systems. For example, in the case of sending an original image at an aspect ratio of m: 3 having a larger frame size than conventionally, m / 1 corresponding to a portion occurring on the face of a current television receiver having an aspect ratio of 4: 3 is preferred. The video signal is stretched by 4 times in time and the low frequency component by time axis multiple and the high frequency component by frequency multiple are transmitted to obtain information of the screen area having an aspect ratio of m: 3 among the rest of the video signal. 07084, July 7, 1987, and U.S. Patent Application No. A spectrum showing a frequency multiplexing method of an example is shown. FIG. 12 (a) is a spectrum of an amplitude modulated television signal for residual sidebands, and FIG. 12 (b) is a signal other than the television signal shown in FIG. 12 (a). multiple By showing a multi-call signal is modulated conversion of the residual sideband of the carrier (P ₁₎ and the phase is different in the same carrier frequency (P _2). Fig. 12 (c) shows the multiple of the signal of Fig. 12 (b) and the signal of Fig. 12 (a), and the bandwidth of the multiple signal is not limited to this.

As a method for frequency multiplexing, there is a method of multiplexing first and third upper bounds of a color subcarrier on a time-vertical two-dimensional frequency. (Japanese Patent 59-171387).

However, the luminance of the video signal processed in this way and the time axis of the color signal are not clear and clean, and thus a way to achieve these methods must be found.

SUMMARY OF THE INVENTION An object of the present invention is to provide a television signal processing apparatus which generates a television signal having a large aspect ratio while being compatible with the current television system.

In order to achieve the above-described object, the present invention provides a signal generation block for performing color signal processing of an electrical signal having an aspect ratio larger than a standard obtained from time-base compression, time-base extension, and the transmitted original image to generate a main signal and a multiple signal; Provided is a television signal processing apparatus at a transmission side including a frequency axis multiple block for multiplexing a main signal and a multiple signal on a frequency axis.

Also, a frequency-axis multi-signal separation block for separating signals multiplexed on the frequency axis of the present invention, a block for separating luminance signals and color signals, a block for demodulating color signals, a block for performing time-base compression, a signal multiplexed on the time axis It provides a television signal processing apparatus at the receiving side comprising a block extending on the time axis and a block compressing a signal multiplexed on the time axis on the time axis.

While the above-described structure is compatible with the current television system, it generates a television signal that transmits screen information having an aspect ratio larger than the standard by multiple methods. The TV receiver is configured to receive images of conventional TV broadcasting without difficulty by time-base compression and to obtain a screen having a larger aspect ratio than conventional ones by using synchronous detection, time-base compression, and time-base extension. The above-described apparatus is installed to receive a screen of a conventional television broadcast without difficulty.

1 is a block diagram of a television signal processing apparatus at the transmission side according to an embodiment of the present invention. In this figure, (1) is a signal generator, (2) is a main signal input terminal, (3) is an amplitude modulator, (4) is a first filter, (5) is an adder, (6) is an oscillator, and (7) is (8) is a multiple signal input terminal, (9) is a modulator, (10) is a second filter, (11) is a composite signal output terminal, (12) is a transmitter, (13) is an antenna, and (14) is Displays a multiple signal overlapping circuit.

The signal generator 1 generates a main signal and a multiple signal, and the main signal is input to the multiple signal overlapping circuit 14 at the main signal input terminal 2, and the multiple signal is multiple signals at the multiple signal input terminal 8. It is input to the overlapping circuit 14. The main signal input to the multiple signal overlapping circuit 14 is used by the amplitude modulator 3 to amplitude modulate the carrier wave P ₁ obtained from the oscillator 6. The amplitude modulated wave obtained is band-limited by the first filter 4 to enter the residual side band before being added to the adder 5. The carrier P ₁ obtained in the oscillator 6 is transformed into the "carrier P ₂ " to which the phase is shifted by the phase shifter 7. By the adder 5, when the outputs of the first, second filters 4, 10 are added together, the phases of the carriers are shifted so that they cross at right angles to each other. In order to suppress the carrier at least during the retrace period, the carrier P ₂ is amplitude modulated by the modulator 9 in the double side band using the multiple signal input to the multiple signal overlapping circuit 14. After band limiting by the second filter 10, the output of the modulator 9 is applied to the adder 5, and the output of the adder 5 becomes a synthesized signal. The synthesized signal is transmitted to the transmitter 12 through the antenna 13. The frequency characteristic of the second filter 10 has the characteristic as shown in FIG. 12 (b).

2 is a block diagram showing an embodiment of the internal configuration of the signal generator 1 of FIG. 21 denotes, for example, an input terminal for luminance signal Y obtained from a screen signal captured by a camera having an aspect ratio larger than the current one, 30 denotes an input terminal for color signal I obtained from the screen signal, ( 38 is an input terminal for the color signal Q ₂ obtained from the screen signal, 24, 26, 33, 35, 41 and 43 are time-base extension circuits, 25, and ( 34, 42 are time-compression circuits 27, 36, 44, switchers, 22, 31, 39, LPF (low pass filter), 23, 32 ), (40) HPF (high pass filter), (28), (46) adder, (37), (45) balance modulator, (29) main signal output terminal, (47) multiple signal output It is a terminal.

A signal corresponding to a portion formed on the screen of the television receiver is called a first signal, and another signal, for example, corresponding on both sides or one side is called a second signal. For example, the luminance signal Y obtained through a known matrix circuit in a signal whose image is switched by a camera having a larger aspect ratio of the reference is transmitted to the time-base extension circuit 24, the LPF 22, and the HPF 23. Is entered.

When the original image is captured at a large aspect ratio of m: 3, the first signal corresponding to the portion formed on the screen of the existing TV set is divided into m / m using time-scale extension circuits 24, 33, and 41. 4 times the time axis is extended. With a CCD camera requiring a shorter horizontal retrace period than the camera tube, it is not necessary to always time-extend the signal corresponding to the portion formed on the screen of the existing television set.

As an example, as shown in FIG. 13 (a), the luminance signal has a waveform on the time axis and has a low spectrum distribution due to energy of high frequency components due to the general characteristics of the frequency or image signal (figure 14 (a)). It is expressed as The luminance signal of the second signal corresponding to the portion of the opposite side or side of the screen is generated by the LPF 22 and the HPF 23 by the high energy frequency components (waveforms in FIG. 13 (b) and frequencies in FIG. 14 (b). Relatively low energy high frequency components (waveform of thirteenth (d) and frequency spectrum of fourteenth (d)) and supplied to the time-base compression circuit 25 and the time-axis extension circuit 26, respectively. In the time compression circuit 25, as described in FIG. 13 (c), the low frequency components shown in FIG. 13 (b) are time-compressed so as to enter the frequency spectrum below the band transmittable by the NTSC method. The low frequency component of is supplied to the switch 27, where the electrons and the output of the time-base extension circuit 24 are time-multiplexed together. In the time-base compression circuit 25, time adjustment is performed so that the time-base compression signal is time-multiplexed during the portion of the electron beam overscan period or the portion of the propoch in the horizontal retrace period.

Typical receivers usually overscan the electron beam by 8% of the image area. Thus, for example, the time-compressed signal is time-multiplexed so that the time-compressed signal is time-multiplexed during a period corresponding to 2% of the percentage and 2% of the normal image area of the front porch. Does not disturb the video. The time base adjustment is performed by delaying the signal, for example by the use of memory. Time-base extension and time-base compression are achieved, for example, by varying the write and read clocks of the memory.

In the time axis extension circuit 26, the high frequency components shown in FIG. 13 (d) are time-scaled as shown in FIG. 13 (e) to the extent that the band is located below the band where the frequency axis can be multiplexed. The signal compressed by the time axis extension circuit 26 is input to the adder 46.

Color signals I and Q are similarly processed. For example, the color signals (I) and (Q) obtained from a signal in which a visual image is converted by a camera having a larger aspect ratio than the conventional ones are used for the time-base extension circuits (33), (41), LPF (31), and (39). (32) and (40), respectively. When the original image is transmitted with an aspect ratio of m: 3 (longer than the conventional screen width), the first signal corresponding to the visible point appearing on the screen of the matrix TV set is subjected to the time-base extension circuit (as in the case of the luminance signal Y). 33), (41) is time-base extended by m / 4 times. The color signals (I) and (Q) of the second signal corresponding to the regions of both sides or one side of the water pipe are high-energy low-frequency components by LPF 31, 39, HPF 32, and 40, respectively. And high frequency components of relatively low energy, and both components are supplied to the time-compression circuits 34 and 42 and the new-axis expansion circuits 35 and 43. The time base compression ratio, time base equipment and time base adjustment are the same as for the luminance signal.

The time-compressed signals are supplied to the switchers 36 and 44, respectively, and the signals are time-multiplexed to the outputs of the time-scale extension circuits 33 and 41, respectively. The outputs of the switchers 36 and 44 are orthogonally modulated by the balance modulator circuit 37 and added to the output of the switcher 27 by the adder 28, and the output of the adder 28 becomes the main signal.

The outputs of the time-scale extension circuits 35 and 43 are orthogonally modulated by the balanced parallel circuit 45, added to the output of the time-axis extension circuit 26 by the adder 46, and the output of the adder 46. Becomes a multiple signal.

When the HPFs 32 and 40 are replaced with LPFs, the LPFs 31 and 39, the time compression circuits 34 and 42 and the switchers 36 and 44 can be removed. 3 is a block diagram showing an embodiment of the internal configuration of the signal generator 1 of FIG. 1, and 51 is a luminance signal obtained from a signal whose image is switched by a camera having a larger aspect ratio than, for example. Input terminal for (Y), (56) is the input terminal for the color signal (I) obtained from the image signal, (61) is the input terminal for the color signal (Q) obtained from the signal, (67), (71) Circuit, 68 is a time compression circuit, 54, 59, 64, 69 is a changer, 53, 58, 63 is LPF, 52, 57 (62) are HPF, (55) and (66) are adders, (60) and (65) are balanced modulation circuits, (70) are main signal output terminals, and (72) are output signals for multiple signals.

For example, the luminance signal Y obtained from a signal obtained by converting an image transmitted by a camera having a larger aspect ratio than a conventional matrix through a known matrix circuit is converted into a switch 54, an LPF 53 and an HPF 53, respectively. Is history on. When the original image is transmitted at a conventional aspect ratio of m: 3 having a long frame width, the first signal corresponding to the visible point appearing on the screen of the conventional television set is added through the switcher 54. Is moved to. The luminance signal of the second signal corresponding to the point on the opposite side or one side of the screen is separated into the low frequency component and the high frequency component by the LPF 53 and the HPF 52, respectively, so that both components are the adder 66 and the switch ( 54). During the periods corresponding to the points on either side or one side of the screen, the HPF 52 and the output flow through the switch 54 to the adder 55.

That is, the color signal I (Q) is similarly processed. For example, the color signals (I) and (Q) obtained through the known matrix circuits in the signal converted from the visual image by the camera having a larger aspect ratio than the conventional ones are 59, 64, and LPF 58, respectively. ), 63, and HPF 57, 62. The color signals I and Q of the first signal are advanced to the balance modulator 60 through the switch 59 and 64, respectively. The color signals I and Q of the second signal are separated into low frequency components and high frequency components by the LPFs 58, 63, and HPFs 57, 62. The outputs of the HPFs 57 and 62 are supplied to the balance modulator 60 through the switch 59 and 64, respectively, for a period corresponding to the points on either side or one side of the screen. After orthogonal modulation, a signal is input to the adders 55 and 66.

The signal corresponding to the point appearing on the screen of the existing television receiver among the outputs of the adder 55 is time-scaled by the time-base extension circuit 67 and input to the switch 69. The time base extension of m / 4 times occurs in the time base extension circuit 67, and signals other than the above signals are time-base extended in the time base extension circuit 71. In the time extension circuit 71, since the structural wave component shown in Fig. 13 (d) is time-base extended, the band is located below the band where frequency-axis multiplexing occurs as shown in Fig. 13 (e). The output of the interpolator 66 is time-compressed by the time-base compression circuit 68 and input to the switch 69. In the time compression circuit 68, since the low frequency component shown in FIG. 13 (b) is time-compressed, the low frequency component is located below the band transmittable by the NTSC method as shown in FIG. 13 (c). The output of the switch 69 becomes a main signal, and the output of the time scale extension circuit 71 becomes a multiple signal. In the time compression circuit 68, the time-compressed signal is time-multiplexed because the time adjustment is maintained at least during some period during which the overscan of the electron beam in the receiver is executed or between some front porch of the horizontal retrace.

When the HPFs 57 and 62 are replaced with LPFs, the LPFs 58 and 63, the balance modulator 65 and the adder 66 can be removed.

Even if the return period signal such as the synchronization signal or the burst signal is omitted, the reference signal or the identification signal is multiplexed during the return period. The reference signal is configured as a standard reference signal capable of correcting the white signal level, the black signal level, the linear width of the color signal, the phase, or the like, or a control signal for controlling the reproduction carrier. The identification signal is a signal for distinguishing the synthesized signal from, for example, a television signal used for existing broadcasting.

Since the time-extended signal is expanded in time by the time-base compression on the receiving axis, the large aspect ratio does not reduce the resolution. The signal multiplexed in the second signal corresponding to the information on both sides or one side of the external screen having an aspect ratio of 4: 3 is supported by the image carrier in the conventional reception method even when the TV and the spectrum intersect. Almost eliminated by synchronous detection, so that little interference caused by the frequency multiplexing signal is generated. In a receiver that demodulates multiple signals, by performing synchronous detection with a phase-controlled video carrier and using a filter, the main signal is obtained without orthogonal distortion as in a conventional receiver, and without a quadrature transformation. Therefore, frequency multiplexed signals corresponding to information on both sides or one side of the external screen surface can be transmitted. In addition, a signal subjected to time base multiplexing is also reproduced by a process such as time base extension. That is, in the reproduction, the original image having an aspect ratio larger than 4: 3 is sent out on the transmission side.

Next, signal processing at the receiving side will be described according to an embodiment of the present invention. For reference, for example, the reception of a TV signal is combined together in the signal processing. 4 is a block diagram of a television signal processing apparatus at a receiving side according to an embodiment of the present invention. In the drawing, reference numeral 101 denotes an antenna, 102 denotes a tuner, 103 denotes a first filter, 104 denotes a first detector, 105 denotes a carrier reproduction circuit, 106 denotes a second filter, and 107 denotes a The phase shifter 108 is a second detector, 109 is a main signal output terminal, 110 is a multiple signal output terminal, 111 is a signal processing circuit, and 112 is a demodulation circuit.

The signal generated at the transmitting side is received by the antenna 101 and frequency-converted on the intermediate frequency band by the tuner 102 and band-limited by the first filter 103. Although the antenna is specifically illustrated, the transmission is not dependent only on the wireless method, and a cable method is also possible. The band-limited signal is supplied to the first detector 104 and the carrier regeneration circuit 105 to generate the synchronous detection half-wave I ₁ . Synchronous detection of the band-limited signal is performed by the carrier I ₁ in the first detector 104, and the output of the first detector 104 becomes the main signal.

The output of the tuner 102 is band-limited by the second filter 106, and the band-limited signal is shifted by the broadcast wave I ₂ shifted to the phase of the carrier wave I ₁ obtained from the carrier reproduction circuit 105. 2 detectors 108 detect synchronously. It should be noted that the amount of phase shift of the carrier I ₂ should coincide with the transmitting side.

The detection output is a multiple signal. The main signal and the multiple signal are input to the signal processing circuit 111, and the signals are multiplexed within the first and third upper bounds located in the color-carrier in the time-vertical frequency plane for frequency-axis multiplexing of the multiple signals. This is considered. The separation of the main signal from the multiple signal by the signal demodulated in the base band at the receiving side takes the signal difference between the color carriers at least equal in phase to the color carriers or the sum of the color carriers in opposite phases. Depends on whether

FIG. 5 is a block diagram showing an embodiment of the internal structure of the signal processing circuit 111 of FIG. 4, where 121 is a main signal input terminal, 139 is a multi-signal input terminal, 122, 141 ) Is the Yc separation circuit, (123), (142) is the color demodulation circuit, (124), (126), (128), (140) is the time compression circuit, (125), (127), (129) is Time-base extension circuit (130), (132), (134) is a switch, (131), (133), (135) is an interceptor, (136) is an output terminal for the luminance signal (Y), (137) is An output terminal for color signal I, 138, is an output terminal for color filter Q. As shown in FIG.

The main signal input from the main signal input terminal 121 is separated into the luminance signal Yc and the color signal Cc by the Yc separation circuit 122, and among the Yc signals output from the Yc separation circuit 122, the transmission side The signal corresponding to the screen surface of an existing television having a time-base extension at 4 and an aspect ratio of 4: 3 is time-compressed by the time-base compression circuit 124, while the other time-time-compressed signal at the transmission side is the time-base extension circuit 125. The time is extended by. In the time base compression circuit 124 and the time base extension circuit 125, reverse time base processing and time base adjustment are performed for the time base extension and the time base compression on the transmission side, respectively, so that transmission and reception are combined together to maintain a normal time relationship. Hereinafter, the time axis expansion circuit and the time axis compression circuit are similarly executed.

The color signal Cc in the Yc separation circuit 122 is demodulated by the color demodulation circuit 123 into an Ic signal and a Qc signal. As in the case of the Yc signal, among the Ic and Qc signals, signals that are time-base extended on the transmission side and correspond to an aspect ratio region of 4: 3 are time-base compressed by the time-base compression circuits 126 and 128, while the time-base is transmitted on the transmission side. The other compressed signal is time-scaled by the time-base extension circuits 127 and 129.

On the other hand, the multiple signals generated by the multiple signal input terminal 139 are time-compressed by the time-base compression circuit 140 and separated into the luminance signal Ys and the color signal Cs by the Yc separation circuit 141. The color signal Cs is demodulated into Is and Qs signals by the color demodulation circuit 142, and the luminance signal Ys is added to the output of the time-base extension circuit 125 by using the adder 131 to the switch 130. Is entered. In the switcher 130, the output of the time base compression circuit 124 is generated for a period corresponding to an aspect ratio area of 4: 3, and the output of the adder 131 is generated for another period.

Similarly, the Is signal is added to the output of the time base extension circuit 127 by the adder 133 and input to the switch 132. In the switcher 132, as each color signal I, the output of the time base compression circuit 126 is generated for a period corresponding to an aspect ratio area of 4: 3, and the output of the adder 133 is generated for another period. Similarly, the Qs signal is added to the output of the time base extension circuit 129 by the adder 135 and input to the switch 134, and the output of the time base compression circuit 128 as the respective color signals at the switch 134. Is generated for a period corresponding to an aspect ratio of 4: 3, and the output of the adder 135 is generated for another period. The luminance signal Y, the color signal I, and the color signal Q are displayed after being converted into R, G, and B signals by the matrix circuit.

When the color signal is not superimposed on the time-multiplexed signal, the time-base extension circuits 127, 129, adders 133, and 135 are unnecessary, so that the output Is and Qs of the color demodulation channel 142 are respectively switched ( 132, 134.

In order to receive the current television broadcast without difficulty, the time-base compression circuits 124, 126, and 128 compress the time-base extended portion of the TV signal having an aspect ratio of a long frame width to restore the TV signal. In other words, the TV image is restored by compressing the conventional aspect ratio portion of the visual image. That is, in order to receive the visual image in accordance with the conventional aspect ratio, it is necessary to time-base compress the string television signal, and the compression ratio thereof depends on the aspect ratio used. However, when the display means is of the liquid crystal type requiring a shorter retrace period than the CRT, time-base compression is not always necessary. In reception of a string television signal, a process of placing a 4: 3 aspect ratio image near the center portion of the TV water pipe while darkening the rest of the water tube having a large frame width aspect ratio by retracement is preferable. 6 is a block diagram of an embodiment of the internal structure of the signal processing circuit 111. As shown in FIG. Reference numeral 151 denotes a main signal input terminal, 152 denotes a multiple signal input terminal, 153, 159, 166, and 172, a switcher, 155, a Yc separation circuit, and 162, a color scheme. By reference, (154), (156), (163), (169) are time-base compression circuits, (157), (164), (170) are time-base extension circuits, (160), (167), (173) Is an adder, 158 and 165 are time-axis adjustment circuits, 161 are luminance signal Y output terminals, 168 are color signal I output terminals, and 174 are color signal Q output terminals. The main signal at the main signal input terminal 151 is input to the Yc separation circuit in the period of the video signal through the switch 153.

In the multiple signal input terminal 152, the multiple signals are time-compressed in the time-base compression circuit 154 against the time-base extension on the transmission side, and are input to the Yc separation circuit 155 in the return period through the switch 153, and Yc The luminance signal Y ₁ and the color signal C ₁ are separated by the separation circuit 155. Of the Y ₁ signals generated by the Yc separation circuit 155, on the water surface of the existing television receiver having an aspect ratio of 4: 3. Corresponding and time-time-extended signals at the transmission side are time-time-compressed by the time-base compression circuit 156, and other signals time-time-compressed at the transmission-side are time-time-extended by the time-base extension circuit 157.

Subsequently, the luminance signal obtained by separating the time-compressed multiple signals in the retrace period from the Yc separation circuit is adjusted in the time-axis adjustment circuit 158 to form a normal time relationship, and the time-base extension circuit ( 157) is added to the output. The color signal C ₁ generated by the Yc separation circuit 155 is demodulated into the L ₁ and Q ₁ signals by the color demodulation circuit 162. As Y ₁ signal from the I ₁ and Q ₁ signal, 4: corresponding to the aspect ratio portion of 3, and time-base decompression at the sending signal is compressed time base by the respective time-base compression circuits 163 and 169, the time axis on the transmission side The other compressed signal is time-scaled by the time-base extension circuits 164 and 170.

On the other hand, the color signal obtained by separating the multi-time signal compressed by the Yc separation circuit in the retrace period is demodulated into I ₁ and Q ₁ signals by the color demodulation circuit 162 and by the time axis adjustment circuits 165 and 171. And are added to the outputs of the time base extension circuits 164 and 170 by the adders 167 and 173 to form a normal time relationship. In the switches 159, 166, and 172, the output of the time compression circuits 156, 163, and 169 as the luminance signal Y, the color signal I, and the color signal Q is 4: 3. And the outputs of adders 160, 167, and 173 are generated in other periods.

If the color signal is not superimposed on the time base multiplexed signal, the time base extension circuits 164, 170 and adders 167, 173 are no longer needed, and the outputs of the time base adjustment circuits 165, 171 are each Guided to switchers 166 and 172.

As described above, according to the circuit structure of the present invention, the main signal and the multiple signal are processed in the Yc separation circuit and the color demodulation circuit to provide a circuit structure of high efficiency.

7 is a block diagram of an embodiment of the internal structure of the signal processing circuit 111. As shown in FIG. Reference numeral 181 denotes a main signal input terminal 199, a multiple signal input terminal 182, 200 denotes a Yc separation circuit, 183, 202 a color demodulation circuit, and 184, 186, ( 188), 201, and 203 are time-base compression circuits, 185, 187, and 189 are time-base extension circuits, and 190, 192, and 194 are switchers 191 and 193 and 195 are adders, 196 is a luminance signal (Y) output terminal, 197 is a color signal (I) output terminal, and 198 is a color signal (Q) output terminal.

In the main signal input terminal 181, the main signal is separated into the luminance signal Yc and the color signal Cc by the Yc separation circuit 182. Of the Yc signals output by the Yc separation circuit 182, a time-base extension is performed on the transmission side, and a signal corresponding to the water surface of an existing television set with a 4: 3 aspect ratio is time-compressed by the new-axis compression circuit 184. The other signal, which is time-compressed on the transmission side, is time-scaled by the time-base extension circuit 185. The color signal Cc generated by the Yc separation circuit 182 is demodulated into the respective Ic and Qc signals by the color demodulation circuit 183. As with the Yc signal, among the Ic and Qc signals, the signal is time-extended on the transmission side and corresponding to the 4: 3 aspect ratio portion is time-compressed by the respective time-base compression circuits 186 and 188, and the time-base compression on the transmission side. The other signal is time-scaled by the time-base extension circuits 187 and 189.

On the other hand, the multiple signals inputted from the output signal input terminal 199 by the (Yc) separation circuit 200 are separated into the luminance signal Ys and the color signal Cs, and then are separated by the time compression circuits 201 and 203. Each time axis is compressed. The output of the time base compression circuit 203 is demodulated by the color demodulation circuit 202 into the (Is) and (Qs) signals. The output from the time base compression circuit 201 is added to the output of the time base extension circuit 185 by the adder 191 and is input to the switch 190. The switch 190 outputs the output of the time compression circuit 184 during the period in which the aspect ratio corresponds to 4 to 3, and the output of the adder 191 as the luminance signal Y during the rest of the period. .

Similarly, the (Is) signal is added to the time axis extension circuit 187 by the adder 193 and input to the switch 192. The switch 192 outputs the output of the time-base compression circuit 186 during the period when the aspect ratio corresponds to 4 to 3, and the output of the adder 193 as the color signal I during the other periods.

Similarly, the adder 195 adds the (Qs) signal to the output of the time base extension circuit 189 and inputs it to the switch 194. In the switch 194, the output of the time-base compression circuit 188 is stored as the color signal Q during the period in which the aspect ratio is four or three, and the output of the adder 195 during the other periods. The color signal Cs as an output signal of the Yc separation circuit 200 is subjected to time-base compression after demodulation and input to the adders 193 and 195.

If the color signal does not overlap the time axis multiplexing signal, the time axis extension circuits 187 and 189 and the adders 193 and 195 become unnecessary so that the output Is of the color demodulation circuit 202 Qs is switched. You may input in (192) (193). When the time signal is compressed after the color signal Cs as the output signal of the Yc separation circuit 200 is demodulated, the compressed time axis signal may be supplied to the switchers 192 and 194.

FIG. 8 is a block diagram showing an example of the signal processing circuit 111 of FIG. Reference numeral 221 denotes a main signal input terminal, 225 denotes a multiple signal input signal terminal, 227 and 229 denote Yc separation circuits, 228 and 230 color demodulation circuits, and 222 and 226. Is a time compression circuit, 223 is a time extension circuit, 224 is a switch, 231, 232 and 233 are adders, 234 is a luminance signal (Y) output terminal, and 235 is a color signal ( I) The output terminal 236 is a color signal Q output terminal.

Among the main signals of the main signal input terminal 221, the time axis signal corresponding to the picture tube screen of the conventional television receiver having a time axis extension on the transmission axis and having an aspect ratio of 4 to 3 is time-compressed by the time axis compression circuit 222, The other signal, which is time-compressed on the transmission axis, is time-scaled by the time-axis extension circuit 223.

The multiple signals of the multiple signal input terminals are time compressed by the time compression circuit 226.

In the time base compression circuits 222 and 226 and the time base extension circuit 223, the time base processing and the time base variation rate are reversed with respect to the time base extension and the time base compression on each transmission side, and transmission and reception are performed in order to maintain a normal time relationship. Combined together. In the switch 224, the output of the time compression circuit 222 is separated during the period corresponding to the water and the screen of the existing television receiver having an aspect ratio of 4 to 3, and the output of the time compression circuit 226 is separated Yc during the other periods. It is input to the circuit 227, respectively. In the Yc separation circuit 227, separation of the luminance signal Yc and the color signal Cc occurs. The color signal Cc output from the Yc separation circuit 227 is demodulated by the color demodulation circuit 228 into the (Ic) and (Qc) signals.

On the other hand, the output of the time axis extension circuit 223 is input to the Yc separation circuit and separated into the luminance signal Ys and the color signal Cs. The color signal Cs is demodulated into the (Is) and (Qs) signals by the color demodulation signal 230, and the luminance signal Yc is added with the luminance signal Ys by the adder 331 to thereby output the luminance signal Y. Is converted to. Similarly, the color signal Ic is added to the color signal Is by the adder 232 and converted into the Yc separation circuit I. Similarly, it is converted to the color signal Qc.

Yc separation circuit 229, color demodulation circuit 230, and adders 232 and 233 are unnecessary unless the color signal is superimposed on the time base multiplex signal, and the output of the time base extension circuit 223 is input to the adder 231. Be harmed. Therefore, the output of the color demodulation circuit 228 changes to the color signal I (Q).

The circuit of such a TV receiver may consist only of a single system of a multi-signal time-base compression circuit, a time-base extension circuit, and a main signal time-base compression circuit, which is the minimum configuration required for the time-base processing circuit.

19 is a block diagram showing an example of the internal structure of the signal processing circuit 111 of FIG. 4, where 251 is a main signal input terminal, 225 is a multiple signal input terminal, 257 is a Yc separation circuit, Reference numeral 261 denotes a color demodulation circuit, 252, 253, and 256 are time-base compression circuits, and 258, 262, and 265 are time-base extension circuits, and 254, a switcher, and 259 and 263. 266 is an adder, 260 is a luminance signal (Y) output terminal, 264 is a color signal (I) output terminal, and 267 is a color signal (Q) output terminal.

Of the main signals of the main signal input terminal, the time axis signal corresponding to the portion of the picture tube screen of the existing television receiver which is extended on the transmission axis and has an aspect ratio of 4: 3 is time-compressed by the time-base compression circuit 252, and the transmission side Since the other time-compressed signal in time is compressed by the time-compression circuit 253, the time-base composition is performed so that the signal appears within the retrace period.

The multiple signals of the multiple signal input terminals are time-time compressed by the time-base compression circuit 256, and the switch 254 is time-time-compressed for a period corresponding to the image tube (water tube) screen of the conventional television receiver having an aspect ratio of 4: 3. The output of the circuit 252 is input to the Ys separation circuit 257 for inputting the output of the time base compression circuit 256 during the other video signal period and the output of the time base compression circuit 253 during the retrace period. These input signals are separated into a luminance signal Y1 and a color signal C1 by the Ys separation circuit 257. The color signal C1, which is an output signal of the Ys separation circuit 257, is demodulated into an I ₁ signal and a Q ₁ signal by the color demodulation signal 261. Among the luminance signals Y ₁ , which are output signals of the Ys separation circuit 257, signals corresponding to signals that are time-compressed by the time-base compression circuit 253 are time-scaled by the time-axis extension circuit 258, whereby the time axis is extended. By adjusting, a normal time relationship is realized. The other luminance signal and the output of the time axis extension circuit 258 are added to each other by the adder 259 and converted into the luminance signal Y.

Similarly, among the color signals I ₁ outputted as the color demodulation signal 261, the color signal I corresponding to the signal time-compressed by the time-base compression circuit 253 is time-scaled by the time-base extension circuit 262, and thus is normally The time base is adjusted so that the time relationship is realized. The other color signal I is added to the output of the time base extension circuit 262 by the adder 263 to form the color signal I.

Similarly, among the color signals Q ₁ , which are outputs of the color demodulation signal 261, the signals corresponding to the signals time-compressed by the time-base compression circuit 253 are time-extended by the time-base extension circuit 265, and thus the normal time relationship is obtained. Adjust the time base to achieve The other color signal Q ₁ is added to the output of the time axis extension circuit 265 by the adder 266 to form the color signal Q.

If the color signal is not superimposed on the time-base multiplexing signal, the time-base extension circuits 262, 265 and adders 263, 266 are unnecessary, and the outputs I ₁ and Q ₁ of the color demodulation circuit 261 are respectively. It becomes the color signal I (Q).

As is apparent from the above description, since the main signal and the multiple signal are not processed separately by the Yc separation circuit and the color demodulation circuit, the signal processing circuit of this embodiment can be effectively constituted by the same single circuit.

10 is a block diagram showing an example of the signal processing circuit of FIG. 4, where 281 is a main signal input terminal, 282 is a multiple signal input terminal, 286 is a Yc separation circuit, and 292 is a color demodulation circuit. (283) (284) is a time base compression circuit, (287) 293 (298) is a time base extension circuit, (288) 294 (299) is a time base adjustment circuit, and (285) (289) (295) ( 300 is a changer, 290 (296), 301 is an adder, 291 is a luminance signal (Y) output terminal, 297 is a color signal (I) output terminal, and 302 is a color signal (Q) output It is a terminal. The main signal of the main signal input terminal 281 is time-compressed by the time-base compression circuit 283, and the multiple signals of the multi-signal input terminal are time-base compressed by the time-base compression circuit 284, and the time-base compression circuit is based on time. Time axis adjustment is performed to prevent the multiple signals from overlapping the output signal at 283. In the time-base compression circuits 283 and 284, the time-base processing is performed on the transmission side opposite to the time-base extension, respectively, and time-base compression is applied to the time-base multiple signals. The switching unit 285 outputs the output of the time-base compression circuit 283 not only during the period corresponding to the picture tube screen of the conventional television receiver having an aspect ratio of 4: 3, but also during the time-base multiple-signal period in which time-base compression is performed. An operation of inputting the output of the compression circuit 284 to the Yc customer circuit 286 is performed.

The Yc separation circuit 286 serves to separate these signals into the luminance signal Y ₁ and the color signal C ₁ . The color signal C ₁ , which is the output of the Yc separation circuit 286, is demodulated into (I ₁ ) and (Q ₁ ) signals by the color demodulation circuit 292.

In the luminance signal Y ₁ of the Yc separation circuit 286, the luminance signal corresponding to the time-base multiplexing signal is time-scaled by the time-axis extension circuit 287, and time-axis adjustment is performed to achieve a normal time relationship. The time base adjustment is performed by the time base adjustment circuit 288 to achieve a normal time relationship. The output of the time base extension circuit 287 and the output of the time base adjustment circuit 288 are added in the adder 290. The switcher 289 serves to select the output of the Yc separation circuit 286 during the period corresponding to the screen of the water pipe having an aspect ratio of 4: 3, and the output of the adder 290 during the other period. The output of the switcher 289 becomes the luminance signal Y. Similarly, among the color signals I ₁ , which are outputs of the color demodulation circuit 292, the color signals I corresponding to the time-base multiplexing signals are time-scaled by the time-base extension circuit 293, and then to achieve a normal time relationship. The time base is adjusted. Further, the color signal I corresponding to the multiple signal is time-axis adjusted by the time axis adjustment circuit 294, so that a normal time relationship is achieved. The output of the time axis extension circuit 293 and the output of the time axis adjustment circuit 294 are added by the adder 296, and the switcher 295 corresponds to the image tube screen of the conventional television receiver having an aspect ratio of 4: 3. While the output of the color demodulation circuit 292 is selected, and during another period, the output of the adder 296 is selected. The output of the switcher 295 becomes the color signal (I).

Similarly, among the color signals Q _{1 that} are outputs of the color demodulation signal 292, the signal Q corresponding to the time-base multiplexing signal is time-scaled by the time-base extension circuit 298, and then in order to achieve a normal time relationship. The time base is adjusted. In addition, the signal Q corresponding to the multiple signal is time-scaled by the time base adjustment circuit 299 so that a normal time relationship is achieved. The outputs of the time axis extension circuit 298 and the time axis adjustment circuit 299 are added by the adder 301, and the switcher 300 performs color demodulation during a period corresponding to the image tube screen of an existing television receiver having an aspect ratio of 4: 3. The output of the furnace 292 serves to select the output of the adder 301 for another period. The output of the switch 300 becomes a color signal Q.

If the color signal is not superimposed on the time base multiple signals, the time base extension circuits 293 and 298 and the adder 296 are not necessary, and the outputs of the time base adjustment circuits 294 and 299 are the switchers 295 and 300. You may input in each.

As described above, since the main signal and the multiple signal are not processed separately by the Yc separation circuit and the color demodulation circuit, the signal processing circuit can be configured with the same single circuit.

11 is a block diagram showing an example of the signal processing circuit 111 of FIG. 4, where 321 is a main signal input terminal, 334 is a multiple signal terminal, and 323 and 335 are Yc separation circuits. 324, 337 are color demodulation circuits, 322, 336, 338, and 339 are time compression circuits, and 325, 326 and 327 are time axis extension circuits, 328, 330 and 332. (329) are the adder, (340) is the luminance signal (Y) output terminal, (341) is the color signal (I) output terminal, and (342) is the color signal (Q) output terminal. .

After the main signal of the main signal input terminal is time-compressed by the time-compression circuit 322, the main signal input terminal is separated into the luminance signal Yc and the color signal Cc by the Yc separation circuit 323. A part of the (Yc) signal, which is the output of the Yc separation circuit 323, is time-compressed on the transmitting side, then is extended by the time-axis extension circuit 325 and input to the adder 329. The color signal Cc, which is the force of the Yc separation circuit 323, is demodulated by the color demodulation circuit 324 into the (Ic) and (Qc) signals. Like the (YC) signal, the (Ic) and (Qc) signals are time-compressed by the time-base compression circuit 322 on the transmitting side, and then these signals are added by the time-base extension circuits 326 and 327 to the adder 331. It is time-extended until inputted to 333, respectively.

On the other hand, the multiple signals of the multiple signal input terminal 334 are separated into the luminance signal Ys and the color signal Cs by the Yc separation circuit 335. The color signal Cs is demodulated into (Is) and (Qs) signals by the color demodulation circuit 337, and the luminance signal Ys is time-compressed by the time-base compression circuit 336, and then by the adder 329. It is added to the output of the time axis expansion circuit 325 and finally input to the switch 328. The switch 328 outputs the output Yc of the Yc separation circuit 323 during the period corresponding to the portion having an aspect ratio of 4: 3, and the output of the adder 329 as the luminance signal Y during the other period. Do it.

Similarly, the (Is) signal is time-compressed by the time-base compression circuit 338, added by the adder 331 to the output of the time-base extension circuit 326, and input to the switch 330. In the switcher 330, the output signal Ic of the color demodulation circuit 324 is output during the period corresponding to the portion having an aspect ratio of 4: 3, and the output of the adder 331 is output as the color signal during another period.

Similarly, the (Qs) signal is time-compressed by the time-base compression circuit 339 and added to the output of the time-base extension circuit 327 by the adder 333 and input to the switch 332. The switch 332 outputs the output signal Qc during the period corresponding to the portion having an aspect ratio of 4: 3, and the output of the adder 333 as the color signal Q during the other period.

When the color signals do not overlap with the multiple signals, the time-base extension circuits 326, 327 and the adders 331, 333 are not necessary, so that the output of the time-base compression circuits 338, 339 is switched to the switch 330. You may input to 332, respectively.

Claims (15)

Means for time-base extension and color signal processing of a first portion corresponding to a standard aspect ratio of an electrical signal obtained by capturing an original image having an aspect ratio having a large standard aspect ratio, and a second portion corresponding to the remainder of the electrical signal. Means for separating components and low frequency components, means for time-base compression and color signal processing of the low frequency signal components, means for time-base extension and color signal processing for the high frequency signal components, signals corresponding to the first portion and the low frequency signals And a signal generating means for generating a main signal and a multiple signal by a time axis multiplexing to a signal corresponding to the component, and a frequency axis multiplexing means for frequency-axis multiplexing the main signal and the multiple signal. 2. The apparatus of claim 1, wherein the frequency-axis multiplexing means comprises: carrier generation means for generating a carrier, first amplitude modulation means for modulating the carrier with the main signal to obtain a residual sideband amplitude modulation signal, Phase shifting means for shifting the phase, second amplitude modulating means for modulating the output carrier of the phase shifting means by the multiplex signal to obtain a carrier suppression both side band amplitude modulating signal, and the second amplitude modulating means And a filter means for band limiting the output, said filter means having a symmetric Nyquist characteristic by said video synchronization detection number for said carrier. The signal generating means according to claim 1, wherein the signal generating means comprises: time-base extension means for time-base-extending the first portion, means for separating the second portion into high-frequency components and low-frequency components, and time-base-extension for obtaining multiple signals. And a means for time-base-compressing the low frequency component, and a time-base multiplexing of the time-base extension means and color signal processing of multiple outputs to obtain a main signal. 2. The signal generating apparatus according to claim 1, wherein the signal generating means comprises: means for time-base extension of the first portion after color signal processing, means for separating the second portion into high frequency components and low frequency components, and the first portion on the time axis. Means for switching high frequency components, means for time-base compression of the high-frequency components after color signal processing, means for switching the output of the time-base extension means and the output of the time-base compression means to obtain a main signal, and obtaining the multiple signals. And a means for temporally stretching the signal corresponding to the high frequency component. Among electrical signals obtained by capturing an original image having an aspect ratio larger than the standard aspect ratio, a first portion corresponding to a standard aspect ratio, a second portion corresponding to the remainder of the electrical signal, and a second portion and a first portion A frequency axis multiple signal separating means for receiving a main signal composed of a low frequency component and a multiple signal composed of the high frequency component components of the second portion, and separating the frequency axis multiple signal into a main signal and a multiple signal, and a first portion of the main signal And a signal processing circuit for temporally compressing a signal corresponding to the signal and processing a color signal, for temporally stretching the signal corresponding to the low frequency component of the second portion of the main signal, and for temporally compressing and processing the multiple signal. Signal processing device. 6. The signal processing apparatus according to claim 5, wherein the signal processing means performs time-base compression on a color signal processing means for separating the luminance signal from the color signal in the main signal and demodulating the color signal, and a signal corresponding to the first portion of the output signal of the color signal processing means. Means for temporally stretching the signal corresponding to the low frequency component of the second portion of the output signal of the color signal processing means, and means for separating the luminance signal from the color signal after temporally compressing the multiple signals. Signal processing device. 6. The apparatus of claim 5, wherein the signal processing means comprises: color signal processing means for separating the main signal into a luminance signal and a color signal and demodulating the color signal, and means for time-compressing a signal corresponding to a first portion of an output signal of the color signal processing means; And means for time-base extension of a signal corresponding to the low frequency component of the second portion of the output signal of the color signal processing means, and means for separating the multiple signal into a luminance signal and a color signal and time-compressing the color signal. Television signal processing device. 6. The signal processing apparatus according to claim 5, wherein the signal processing means performs time-base compression on the main signal, separates the color signal from the luminance signal, demodulates the color signal, and outputs a signal corresponding to the low frequency component of the second portion of the output signal of the color signal processing means. And means for time-base extension, and means for separating the multiple signals into luminance signals and color signals, and means for time-base compression of the separated signals. Among electrical signals obtained by capturing an original image having an aspect ratio larger than the quasi aspect ratio, a first portion corresponding to a standard aspect ratio, a second portion corresponding to the rest of the electrical signal, and a second portion and a first portion A frequency axis multiple signal separating means for receiving a main signal composed of a low frequency component and a multiple signal composed of the high frequency component of the second portion at a receiving side, and separating the frequency multiplex signal into a main signal and a multiple signal; A signal for time-base compression and color signal processing of a signal corresponding to one portion, and a time-base extension of a signal corresponding to the low frequency component of the second portion of the main signal, and switching the multiple signal on the time axis with respect to the time-base compression and the main signal. A television signal processing apparatus comprising a processing means. 10. The apparatus of claim 9, wherein the signal processing means divides the main signal into a luminance signal and a color signal, and decodes the color signal and demodulates a signal corresponding to a first portion of an output signal of the color signal processing means. Means, time-base-expanding the signal corresponding to the low frequency component of the second portion of the output signal of the color signal processing means, and time-decompressing the multiple signal and switching it on the time-axis with respect to the main signal. Signal processing device. 10. The apparatus of claim 9, wherein the signal processing means comprises: first time compression means for time-compressing the main signal, second time compression means for time-compression of the multiple signal, and the first and second time-compression compression. A time axis switching means for time-switching the output of the means, a color signal processing means for separating the output of the time-axis switching means into a luminance signal and a color signal, and demodulating the color signal and a low frequency component of a second portion of the output signal of the color signal processing means. And a means for time-base-extending the signal, and means for temporally-adjusting a signal corresponding to multiple signals among the output signals of said color signal processing means. Among electrical signals obtained by capturing an original image having an aspect ratio larger than the standard aspect ratio, a first portion corresponding to a standard aspect ratio, a second portion corresponding to the remainder of the electrical signal, and a second portion and a first portion A frequency axis multi-signal separating means for receiving a main signal composed of a low frequency component and a high frequency component of the second portion, and separating a main signal and a multiple signal from the frequency axis multiple signal, and a first portion of the main signal A first time-compression means for time-base-compressing a signal corresponding to the signal; a time-base extension means for time-base-extending the signal corresponding to the low frequency component of the second portion of the main signal; and a second time-base for time-base compression of the multiple sound signal. A compression means, time axis switching means for switching the output of the first time axis compression means and the output of the second time axis compression means with respect to the time axis, and the time axis First color signal processing means for separating the luminance signal and the color signal from the output of the ring means and demodulating the color signal, and second color signal processing means for separating the luminance signal and the color signal and demodulating the color signal at the output of the time axis extension means. TV signal processing apparatus, characterized in that consisting of. A first portion corresponding to a standard aspect ratio, a second portion corresponding to the remainder of the electrical signal, and a low frequency of the second portion and the first portion of an electrical signal obtained by capturing an original image having an aspect ratio larger than the standard aspect ratio A frequency axis multi-signal separating means for receiving a main signal composed of a component and a multi-signal composed of a high frequency component of the second part, and separating the main signal and a multiple signal from a frequency axis multiple signal, and corresponding to the first portion of the main signal; First time-compression means for time-compressing a signal, second time-compression means for time-compressing a signal corresponding to the low frequency component of the second portion of the main signal, and a third time-base for time-compression of the multiple signal. A compression means, time axis switching means for switching with respect to time axis outputs of the first, second and third time axis compression means, and an output of the time axis switching means. A television signal processing apparatus comprising: a color signal processing means for separating a luminance signal and a color signal, demodulating the color signal, and means for time-base-extending a signal corresponding to a low frequency component of a second portion of the output of the color signal processing means; . 14. The apparatus according to claim 5, 9, 12, or 13, wherein the frequency-axis multiplex signal separating means is synchronized using a filter means for removing orthogonal distortion, and a broadcast wave having the same frequency and different phase difference of the video carrier wave. A television signal processing apparatus, comprising means for detecting. The method of claim 5, 9, 12, or 13, wherein the frequency-axis multiplex signal separating means uses a color subcarrier that is out of phase with each other or a difference between signals having color subcarriers in phase with each other. And a means for obtaining the sum of the excitation signals.

Images