CN1043419A - Color television transmission system - Google Patents
Color television transmission system Download PDFInfo
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- CN1043419A CN1043419A CN89109077A CN89109077A CN1043419A CN 1043419 A CN1043419 A CN 1043419A CN 89109077 A CN89109077 A CN 89109077A CN 89109077 A CN89109077 A CN 89109077A CN 1043419 A CN1043419 A CN 1043419A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
- H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
- H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
- H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
- H04N11/16—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system
- H04N11/167—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system a resolution-increasing signal being multiplexed to the PAL-system signal, e.g. PAL-PLUS-system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
- H04N11/24—High-definition television systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/007—Systems with supplementary picture signal insertion during a portion of the active part of a television signal, e.g. during top and bottom lines in a HDTV letter-box system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
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- Engineering & Computer Science (AREA)
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- Signal Processing (AREA)
- Color Television Systems (AREA)
- Television Systems (AREA)
Abstract
The present invention is a television transmission system, this system is when transmitting the TV signal of 4: 3 the ratio of width to height that a suitable standard TV receiver receives or during transmission " mailbox (letter box) " signal, also sends one by a kind of additional information of special relevant 16: 9 the ratio of width to height that television set received the decode.This additional signal produces in sending part, includes the information of higher frequency spectrum part.Additional signal be modulated at by this way the PAL colour information (U, V) on, promptly (U, spectral regions V) is occupied by twice colour information.
Description
The present invention relates to color television transmission system.
For in the ratio of width to height be 4: 3 existing television standard (as, PAL, SECAMNTSC) introduce 16: 9 wide picture format in, we discuss so-called " mailbox (letter box) " method (seeing that " the improvement possibility and the development trend of Verbesserungsmoglidkei-ten und Entwicklungstendenzen bei PAL(PAL system) " that G.Holoch was done on January 17th, 1989 and F.Muller-Romer are in Fernseh-und Kinotechnik(TV and motion picture technique in the FKTG lecture) the 43rd volume earlier, " the Kunftige Fernsehsysteme(future television system) " that is delivered in June, 1989 number.In this method, the full detail that 16: 9 modes write down can be compatiblely is that the mode of black reappeared on the receiver at 4: 3 with lower limb on the image.Begun to carry out such work in the U.S., promptly 16: 9 graphic form to launch (seeing that H.Weckenbrock and W.Wedam are in Fernseh-und Kinotechnik(TV and motion picture technique) with the mode of TSC-system compatibility, the 42nd volume, deliver in July, 1988 number " ACTV-Advanced Compatible Television(advanced person's compatible tv)-Vorschlag fur eine neue, kompatible Breifbild-Fernsehnorm fur die USA ").(new suggested: the panavision standard that is applicable to the U.S.).
On principle,, appear at as condition like ACTV and so on and the information material of 16: 9 size to be modulated on the inferior subcarrier and it to be transferred out in mode with 4: 3 pictorial information compatibility for the PAL system.Yet, compared with in a NTSC system, this subcarrier must have different spectrum positions, (be accompanied by filtering and must not absent variable so-called " Fukinuki hole ") just in time be in by the colored propagation component of NTSC system (I, Q) position occupied because " free space " in the PAL frequency spectrum.
Experiment shows that additional information must hanged down 20dB to guarantee almost glitch-free compatible reception the in the receiver of a standard on the amplitude.In addition, in ACTV, the overscan regions that high-octane low frequency additional information is expert at is transmitted.This overscan regions comprises the capable marginal portion that usually is not shown on the standard receiver.The zone of this demonstration can change, and therefore, in the standard receiver, in horizontal edge extent, the additional information of being transmitted will be perceptible.
Can use owing to be used for the transmission frequency band that " mailbox " method of standard receiver and 16: 9 receivers also only has only a width to be approximately 5MHz, its result is exactly that the quantity compared with reference receiver with ratio (16: 9)/(4: 3)=1.333 of the image aspect that is equivalent to both of the horizontal apparent resolution (pulse number/at the visual angle of waiting under the sighting distance) of 16: 9 receivers descends.Yet preferably standard has equal level with 16: 9 receivers and helps resolution, and this point is that we are desirable.
Purpose of the present invention just is to propose a compatible transmission system that is used for the PAL signal, and it is 4: 3 image that this system can provide a ratio of width to height to the receiver of standard, can partly being filled in " mailbox " method of this image; Can also provide a specification to improved receiver is 16: 9 image, particularly can have the level that is equivalent to 4: 3 specifications and help resolution.
This task is finished by the feature described in the claim 1.New developments more of the present invention provide in appended claims.
At first, at the transmitter this respect, represent 16: 9 additional information of big image aspect to be modulated on the colour information U and V that in the transmission of PAL signal, occurs, and selected a kind of modulating mode, can overlap each other by means of the spectral range of this pattern color information U and V.For example the method that this can quadrature modulation realizes.In a standard receiver to colour information U and V decoding, owing to lack corresponding decoder, this additional information just has been suppressed.On the other hand, an improvement that is used for 16: 9 image aspects receiver comprised a corresponding decoder, this decoder can with the decoder that is used for standard signal together, the image of 16: 9 specification is provided.
In " mailbox " method, the expansion owing to image in the transmitter causes that the high-frequency brightness signal component of horizontal direction disappears, and this part signal can be isolated from total luminance signal, and can be modulated on colour information U and the V.
Below, with accompanying drawing this inventive embodiment is described sequentially.
Fig. 1 is a NTSC signal with vertical spatial frequency fy and temporal frequency ft(with reference to number of active lines) be the frequency spectrum of coordinate;
Fig. 2 is a PAL signal with vertical spatial frequency fy and temporal frequency ft(with reference to number of active lines) be the frequency spectrum of coordinate.
The square frame chart of Fig. 3 wide screen PAL encoder;
The image of Fig. 4 side ratio 4: 3 and 16: 9 shows;
Fig. 5, the brightness resolution of 16: 9 marginal information;
Fig. 6, first example the time cut apart multiplexing (timeplex) part;
Fig. 7. time-division multiplex transmission (timeplex) part of second example;
Fig. 8. be used for the filter 11 of second example;
Fig. 9. the block diagram of wide screen PAL decoder;
Figure 10. be used to make up the device of luminance component according to Fig. 5;
Figure 11. obtain the circuit of high-frequency luminance signal component;
Figure 12. the frequency spectrum of luminance signal;
Figure 13. the frequency spectrum of the modulation and demodulation first time of luminance signal;
Figure 14. the frequency spectrum of the modulation and demodulation second time of luminance signal;
Figure 15. the frequency spectrum of higher frequency components (additional signal in vertical spatial frequency and horizontal frequency coordinate).
In Fig. 1 and 2, shown spectrum position for the luminance and chrominance information of NTSC in the fy-ft coordinate and PAL signal.From Fig. 1 and Fig. 2 we as can be seen, NTSC and PAL have very big difference in the color transmission.Because the V signal line-by-line inversion in the PAL system, U in the PAL system and V signal do not occupy same position, the situation that I and Q signal occurred in the NTSC system in frequency spectrum.Owing to this reason, in the present invention, these spectral regions in the PAL system are occupied by secondary.Simultaneously, the additional information of 16: 9 the ratio of width to height signals in additional signal just is modulated on the color carrier wave with the quadrature modulation form.
Hereinafter be referred to as the vitascan of " wide screen PAL ", allow the compatible transmission of PAL of volume/decoding and 16: 9 picture intelligences, and have following advantage:
Have favorable compatibility for general PAL receiver,
General PAL receiver has guaranteed the inhibition to the cross interference of luminance signal by being used in the way that adopts notch filter on the brightness circuit,
With synchronous color demodulation way, the quadrature component of additional modulation on color carrier can be not decoded,
In the PAL studio, can directly write down the PAL signal of large-screen,
Guaranteed enough stability by burst gating pulse, therefore, made wide screen signaling be able to reappear very simply.
Fig. 3 has shown the encoder of a wide screen PAL, and image aspect is that 1: 9 signal can be used as signal source.These signals originate from sequential scanning and interlacing scan (for example 1250/50/1: 1,1250/50/2: 1,625/50/1: 1,625/50/2: 1,525/60/1: 1 or 525/60/2: 1).Do not satisfy the signal source of transmission standard for other, (automatically) decoding treatment process of a coupling must be set, thereby guarantee to provide the signal that satisfies transmission standard.At image aspect is that 16: 9, scan line are under 625 the situation, the R that waits to handle, and G, the B colour information at first is converted into luminance component Y and two chrominance component U and V in matrix 1.Then, these information of 16: 9 component in one-component circuit 2 just is divided into 4: 3 average information and 16: 9 marginal information signal, sees Fig. 4.Because 4: 3 middle part information are only corresponding to only 3/4 of the effective scanning line of 52 microseconds, this signal must be in time enlarges with 4/3 letter rate, produces signal with standard receiver compatibility with correct how much ratios.This is finished by an expanded circuit 3.Subsequently, the notch filter of a routine can be introduced among the luminance channel Y, with the interference of avoiding color to intersect.Carrier chrominance signal U and V in a low pass filter 5 from line frequency to 1.3MHz(-3dB) carry out pre-filtering (recommending) respectively according to CCIR.Then, carry out a low-pass filtering, the vertical resolution of carrier chrominance signal is restricted to 72C/pH(angular frequency/image height) with field frequency fy.Color-resolution just in time the same high (MAC:multiplexed analogue components) like this with the MAC signal.The theoretic necessity of this pre-filtering system can be as seen from Figure 2, even just later like this in the active images of the expansion that causes ft directional spectrum component, the field overlapping (verticalalias) of spectral regions has also been avoided.
Such carrier chrominance signal through pre-filtering just is sent on the common PAL modulator 7 then.The output signal of PAL modulator 7 is exactly carrier chrominance signal Uf and the Vf to PAL color carrier wave quadrature modulation, they form a common CSCC(composite video signal color correction with the synchronizing signal an of Y-signal of regulating with time delay line circuit 8 and (for example) standard) signal.The combination of these signals is carried out by an accelerating circuit 9.In the encoder in standard, PAL modulator 7 has adopted 0 degree phase position of color carrier wave to modulate the U parameter, (to call Fu in the following text) and modulate V quadrature component (hereinafter referred to as Fv) for+/-90 ° color carrier with phase place.Carrier wave Fu and Fv can be drawn PAL modulator 7 and can be used when handling wide screen PAL signal.
16: 9 marginal information had only occupied 1/4 of last 52 microsecond total times of delegation.Brightness signal Y at first is sent on the expanded circuit 10, and its coefficient that enlarges multiplying power is 4, and then this signal is come a filter capacitor 11, and this circuit 11 is the Y baseband signal generation Y without temporal extension
1And Y
2Component, shown in Figure 5.
In the implementation of first example, filter 11 has produced a signal Y
2, its field frequency is limited in 72c/ph, and occupied in the horizontal direction the frequency band that width is 1MHz (base band 4MHz, Fig. 5) and whole sweep time of delegation.Through after a sweep time (row postpone) adapter 12, this signal is come an adaptive multiplexer 13, here with chrominance information, has produced the composition of colourity and monochrome information in the time-division multiplex transmission.
The carrier chrominance signal of 16: 9 marginal information is expanded by 2 compression/extension device 14 by a variation coefficient, then carry out pre-filtering at a capable low pass filter 15, for example, becoming a width is 250KHz after 500KHz(is equivalent to expand) baseband signal.Carrier chrominance signal U and V be by a field filter 16 then, this filter with the field resolution limit at 72c/ph.Now, adaptive multiplexer is just selected carrier chrominance signal U and V and brightness signal Y in the mode of Fig. 6
2Carrier chrominance signal U and V occupied respectively between 50% the departure date, and brightness signal Y has occupied 10% line time.Monochrome information Y
2So just be sent on the linear modulator 17, this modulator receives a colour carrier Fu who has been rotated 90 ° of phase angles by phase shifter 18 in the mode of modulating frequency.Chrominance information U and V are admitted to another linear modulator 19, and this modulator receives a colour carrier Fv who has been rotated 90 ° of phase angles by phase shifter 20 in the mode of modulating frequency.Then, colour carrier signal frequently is sent to two decrementers 21,22, and here amplitude is lowered with a factor less than 1, so that obtain the PAL receiver of standard better compatible.After this, these signals are just delivered to add circuit 9, and combine with standard P AL output signal, and encoded back forms the CSSC wide screen PAL signal of a compatibility.
In second example, fringe region field brightness resolution has increased.Necessary parameter Y1, Y1 ', U and V mix in adaptive multiplexer 13, and merge in the mode shown in Fig. 7.Like this, luminance component Y2 has occupied the whole sweep time of delegation once more, and each chrominance component U and V need 6.5 microseconds respectively, and luminance component Y1 needs 39 microseconds.17 li of linear modulators, the luminance component Y2 in broadband is modulated on the Fu carrier wave once more.According to Fig. 5, filter 11 produces component Y1 and Y2 once more, and in Fig. 8, a field filter 11a who mends mutually provides a component Y2 and the component Y1 that field resolution is 72～144c/ph that field resolution is 0-72c/ph.In line filter 11b, it is the 1MHz of 4MHz(through temporal extension that brightness parameter Y2 is limited in a brightness) base band on.Luminance component Y1 passes through inverter 11c displacement 372c/ph in vertical direction, makes the position of present field frequency reach 0～72c/ph.Behind a line filter 11d, signal Y1 ' is the 0.75MHz of 3MHz(after temporal extension with the width) the mode of base band produce.The chrominance information U of 16: 9 margin signals and V have occupied effectively All Time 13 microseconds of row.These signals are 2 compression/extension device 14 compressions in time by coefficient, deliver to a low pass filter 15 then, and this low pass filter is constrained to base band the horizontal resolution (the compression back is 1MHz) of 500KHz.The back is connected to a filter 16.In adaptive multiplexer 13,, produce informational content (U/V, Y1 ') according to Fig. 7.In linear modulator 19, these compositions are modulated on the colour carrier Fv.Fig. 9
Fig. 9 has showed the PAL decoder of a wide screen, and wherein, the CSCC signal at first is sent on the common PAL demodulation device 23.This demodulator provides component signal Y, U and the V of the image middle part information of 4: 3 the ratio of width to height.Subsequently, carrier chrominance signal U and V pass through a field filter 34, and are low pass filtering 0-72c/ph.Delay line 24 is adjusted Y, U and V signal in time, makes it to be adapted to 16: 9 marginal information signals.The CSCC signal leads to 25 by a band again, and the logical maximum bandwidth of this band is 2MHz, and has the centre frequency that is on the color carrier frequency.A clock circuit 26 regains Fu and Fv in the burst gating pulse from be present in the CSCC signal.Fu and Fv are sent in 90 ° of phase-shift networks 27 and 28.Clock circuit also receives the CSCC signal without bandpass filtering, so that produce a capable synchronous control signal S.The colored color carrier signal of having rotated through the phase angle outputs on demodulator 29 and 30.On the other hand, these demodulators also receive the signal through the CSCC of bandpass filtering.Be directed to transmitter the decay here, the component signal that demodulation is come out obtains the amplification of factor less than 1 1/a in amplifier 31,32.The amplifier back is connected to one with the filter 33 of signal limitations at 0-72c/ph.These signals are come in the contrary-adaptive multiplexer, and are broken down into luminance and chrominance information.For example in the implementation of first example, during marginal information, a compression/extension device 36, during marginal information with the carrier chrominance signal among coefficient 2 first embodiment of compression, and with coefficient 4 compression luminance signals.In a storing apparatus 37, signal can be read out after the duration of delegation.A selector 38 is controlled by control signal S, and changes YUV signal with marginal information and middle part sequence of information, and in a contrary matrix 39, these YUV signal are converted into rgb signal.
In second embodiment, monochrome information comprises Y1 ' and two components of Y2.A device that is used for making up these two components has been shown among Figure 10.In receiver one side, contrary-adaptive multiplexer 35 provides this two Y component signals.Y1 ' component is expanded the effective line length to 52ms in expanded circuit 40, be converted to the upright position of 72-144c/ph then by transducer 41, in add circuit 42 with the addition of Y2 component.Luminance signal as shown in Figure 5 consequently.During only occupying the chromatic component U of 6.5ms and V during being expert at respectively and in compression/extension device 36, being extended to marginal information by the factor " 2 ".The processing of 37 to 39 pairs of YUV signal of circuit part is identical with the situation among first embodiment.
In the 3rd embodiment, because of the field high-frequency brightness signal that the image aspect expansion is lost is separated and is modulated on colour information U and the V from total brightness information.
Use circuit arrangement as shown in figure 11 can be isolated the high-frequency brightness information of additional transmitted from total brightness information.Brightness signal Y is sent into a low pass filter TP1, and the luminance signal after low-pass filtering is then adjusted by row delay circuit 110, and deducts from brightness signal Y.Corresponding frequency spectrum has been shown among Figure 12 to be represented.
The frequency of selecting in the example among Figure 12 has satisfied the requirement that has improved because of the cause of visual side ratio in mode cleverly.From brightness resolution (6.75MHz) and bandwidth according to the digital studio of the 601st recommendation of CCIR-is the transmission channel of 5MHz, and the bandwidth that can calculate total brightness signal waiting for transmission is 5MHz * (16: 9)/(4: 3)=6.75MHz.The edge of low pass filter TP1 (both sides) must be positioned at the OdB bandwidth of transmission channel, and is the Nyqnist(Nyquist symmetrical with 4.5MHz) edge.Though the band splitting of mending mutually according to Figure 11 comes, the path at edge (path) must resemble a Nyquist edge.
Represented with the first method to be brightness Y in the mode of frequency spectrum designation among Figure 13
*Compatibility transmission and modulation, filtering and the reproduction carried out.Signal Y shown in Figure 13 a
*By being modulated, (for example) 6.75MHz moved on to the spectrum position shown in Figure 13 b.Passing through (for example) U component to carrier wave f from spectrum position shown in Figure 13 b
* SCThe method of carrying out quadrature modulation moves to before the spectrum position shown in Figure 13 c, and the component that is positioned at the 13.5MHz place that produces previously can filter with a low pass TP2, is perhaps curbed by transmission news road.Has a stationary phase and one f in the+phase place switched between/-90 °
* SCComprise phase shifter 18 among first or second embodiment and two output signals of 19.
Shown in Figure 13 c, (Figure 13 compatibility transmission a), transmission bandwidth needs 2 * B to carry out the luminance signal that bandwidth is B.In the brightness branch road of standard P AL receiver with the outline line notch filter 130 that drawn, only demonstrate in compatibility receives near luminance signal suppress on a small quantity, therefore, the cross interference of brightness still occurs.
In 16: 9 receivers, to f
* SCCarry out primary modulation again, thereby the frequency spectrum shown in Figure 113 c is moved on the frequency spectrum shown in Figure 13 d.Promptly the frequency spectrum among Figure 13 d is moved to the frequency spectrum shown in Figure 13 e by 6.75MHz being carried out once new modulation.A low pass TP3 leaches required Y
*Component, this Y
*Component combines again with at wideband transmit (promptly being in original position) width frequency spectrum, and structure broadband total frequency spectrum Y(Figure 12 is a).Resemble Y
*The same, high frequency U, V signal component also can be after treatment as U
*And V
*Be modulated on the carrier wave of V component.
Illustrated among Figure 14 in order to carry out the compatibility transmission luminance component Y
*Modulate, second possible scheme of filtering and reproduction.At first, reuse circuit arrangement shown in Figure 11 and set up high frequency luminance component Y with method shown in Figure 12
*If Y
*Be interpreted as to being by to f
1The modulation and move to the base band luminance component shown in Figure 14 a, so, Y
*Can use f(=f
1-f
* SC) mode of carrying out single-side band modulation moves in the frequency range of desired compatible transmission.Cause is to f=f
1-f
* SCThe f=2f that modulates and occur
1-f
* SCSpectrum component (Figure 14 b) can with a low pass TP4 leach or be transmitted news the road suppress.Shown in Figure 14 c, to the Y at the center of the notch filter 140 that is positioned at standard P AL receiver
*Compatibility transmission only need a dedicated bandwidth B.Therefore, the brightness cross interference in the compatible receiver has been curbed with a kind of form easily.
In 16: 9 receiver, by to f=f
1-f
* SCCarry out a demodulation again, make Y
*Component is got back on the home position shown in Figure 14 d.Appear at f=f after the modulation
1-f
* SCSpectrum component filter by means of a high pass HP.
If f
1Represent colored carrier frequency f
SCThe multiple of (corresponding to the input signal of phase shifter 18 and 19) so, can be f just easily
1Determine its value.Because this moment can realize by burst gating pulse synchronously in the receiving system.Give an example f
1Can equal (5/4) * f
SCIf band splitting is as shown in figure 14 carried out by this way, promptly low pass TP1 has one and colour carrier f
SCThe edge (sideband) of symmetry, colour carrier f
SCCan carry out in the receiver at 16: 9 can being used as phase reference easily when spectrum component merges (combination).From P3414271.1, can find the method for setting up phase reference like this.
Because as mentioned above, for fear of obscuring mutually with active images, have only those additional frequency spectrum components just to be modulated on the chrominance component U and V that its vertical resolution is no more than 72c/ph, therefore, the vertical resolution expansion that preferably makes 16: 9 high-frequency brightness signals in the receiver to 72c/ph, thereby make reference receiver and 16: 9 receivers on vertical resolution, reach harmonious.The vertical frequency band limits that has illustrated among Figure 15 correspondingly improving of high frequency luminance component shown in Figure 2.Vertical resolution is limited in the 144c/ph that 625 Systems Theorys (scanning is theoretical) of going the interpolation scanning systems are allowed.Total frequency spectrum shown in Figure 15 can be divided into a Y
1 *The Y of a component and a complementary vertical filtering of process
2 *Y
1 *Because extending range is between 0 to 72c/ph, therefore directly U and the V of quadrature modulation in Phase Alternation Line system splits; And Y
2 *(72c/ph to 144c/ph) must drop between 0 to 72c/ph this component at the upright position superior displacement earlier, just can be modulated on V or the U then.Its corresponding method in second embodiment in conjunction with Fig. 3,5,7,8 and 9 describe Y
2And Y
1Done introduction during ' signal.
In the 4th embodiment, the additional information performance of quadrature modulation on U or V component is the auxiliary signal of a demonstration of having supported to improve in receiving system.As everyone knows, avoided scintillation effect (25H very naturally in the top the sort of demonstration that has improved
2Flicker) and row interpolation " row moves " that form, thus can improve the vision vertical resolution.H.Weckenbrok and W Wedam are the 42nd of " TV and motion picture technique " magazine, deliver in July, 1988 number " ACTV:Adranced Compatible Telvsion(advanced compatible TV)-Vorschlag fur eine neue, Kompatible Breitband-Fernse hnorm fur die USA(new idea: the wide screen compatible tv that is applicable to the U.S.) " be described in detail in this notion of auxiliary signal in the literary composition.Under the help of the auxiliary signal that is modulated on the colour carrier (as other several embodiment), can on the receiver of following kind, realize advanced the demonstration:
4: 3 reference receivers,
16: 9 receivers,
16: 9 receivers with enhanced brightness resolution,
The receiver or the color television transmission system that postpone to transmit in the row (vertical line delay line) additional signal according to P3912470.3 row on the scene.
Claims (14)
1, is used to send and the color television transmission system of the TV signal of acceptance criteriaization, had first image aspect 4: 3, the additional signal that is wherein comprising 16: 9 information of relevant second image aspect is added in the standard television signal, this additional signal can be able to be made a receiver of its decoding receive, it is characterized in that: standard television signal in the PAL signal and above-mentioned additional signal are modulated at colour information (U in the PAL signal with such method, V) on, (U, spectral regions V) is occupied by dual to make colour information exactly.
2,, it is characterized in that including in the above-mentioned additional information TV signal of second pixel format that expression exceeds the edge image bar of first pixel format according to the color television transmission system of claim 1.
3, according to the color television transmission system of claim 1 or 2, it is characterized in that: the bandwidth that produces a bandwidth ratio standard television signal at transmitter one end is also wanted wide TV signal, and the standard television signal component of the upper frequency of the TV signal that is above standard is used as additional information.
4, according to claim 1,2 and/or 3 color television transmission system, it is characterized in that: above-mentioned additional information in baseband frequency range with time-multiplexed mode be modulated at existing colour information (U, V) on.
5, according to the color television transmission system of one or more claims of power face, it is characterized in that: colored letter look (U, V) thereby dual holding of spectral regions is to make the phase position of carrier wave of additional information by quadrature modulation under any circumstance all (U, the phase position of carrier wave V) differ 90 ° with colour information.
6, according to the color television transmission system of one or more claims of front, it is characterized in that: above-mentioned additional information is divided into bigger component of bandwidth and the less component of bandwidth, after corresponding quadrature is adjusted, component that bandwidth is bigger such as important place are in occupation of the spectral regions of U component, and the less dual spectral regions in occupation of the V component of component of bandwidth.
7, according to the color television transmission system of one or more claims of front, it is characterized in that the amplitude of additional information is lowered at transmitter one end; And at receiver one end, the corresponding lifting of getting back.
8,, it is characterized in that additional information entering before the transmitter earlier through vertical pre-filtering, also carries out corresponding post-filtering in receiver according to the color television transmission system of one or more claims of front.
9, according to the color television transmission system of one or more claims of front, it is characterized in that: in transmitter one side above-mentioned additional signal is compressed in time or expands, and in receiver, carry out corresponding temporal extension and compression for second kind of form.
10, according to the color television transmission system of one or more claims of front, it is characterized in that: before transmission, earlier the brightness and/or the carrier chrominance signal of standard television signal are carried out vertical pre-filtering (see figure 2).
11, color television transmission system according to Claim 8, it is characterized in that: before transmission, the frequency location of the component of vertical frequency higher (72 among Fig. 5 and Figure 15 is to 144c/ph) is converted to a different lower frequency range (0-72c/ph among Fig. 5 and Figure 15) by modulation in the additional information (Y2 among the Y1 among Fig. 5 and Figure 15), reorientates according to its original signal spectrum position (72-144c/ph among Fig. 5 and Figure 15) in receiver again.
12, according to the color television transmission system of one or more claims of front, it is characterized in that: before transmission, additional information is carried out horizontal pre-filtering, in touching the receipts machine, carry out corresponding post-filtering again.
13, according to the color television transmission system of claim 12, it is characterized in that: before transmission in the additional information (Y among Figure 13 a) spectrum position of the higher component of horizontal frequency by modulation conversion to different, lower frequency range (Figure 13 c) usually, reorientate the original signal spectrum position (Figure 13 c) according to it again in receiver.
14, according to the color television transmission system of claim 5-13, it is characterized in that: the conversion of the component that the horizontal frequency in the additional information (Y among Figure 14 a) is higher be by to a frequency producing in the mode of phase place-accurately in the receiver particularly to one with colour information (U, carrier frequency V) multiply by behind the factor frequency that the difference with the carrier frequency of additional information draws modulates and realizes; Above-mentioned factor is made up of the ratio of two integers, disperse frequency spectrum particularly to remove by transmission news road with low pass, be to be positioned the home position (Figure 14 a) in the receiver by the frequency identical with the frequency used before the transmission being modulated the high fdrequency component that makes in the additional information (Figure 14 c), like this, carry out once resecting again with a high pass (Figure 14 b) and just can obtain the additional information (Y among Figure 14 d
*) in high-frequency information.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3841073A DE3841073A1 (en) | 1988-12-07 | 1988-12-07 | Colour television transmission system |
| DEP3841073.7 | 1988-12-07 | ||
| DE3926388A DE3926388A1 (en) | 1989-08-10 | 1989-08-10 | Colour television transmission system |
| DEP3926388.6 | 1989-08-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1043419A true CN1043419A (en) | 1990-06-27 |
| CN1015858B CN1015858B (en) | 1992-03-11 |
Family
ID=25874867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89109077A Expired CN1015858B (en) | 1988-12-07 | 1989-12-05 | Color television transmission system |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0447473A1 (en) |
| JP (1) | JPH04502243A (en) |
| KR (1) | KR910700592A (en) |
| CN (1) | CN1015858B (en) |
| AU (1) | AU4820890A (en) |
| HU (1) | HUT60082A (en) |
| MY (1) | MY104281A (en) |
| PT (1) | PT92500A (en) |
| WO (1) | WO1990006658A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9123004D0 (en) * | 1991-10-30 | 1991-12-18 | British Broadcasting Corp | Improvements in television systems |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59171387A (en) * | 1983-03-18 | 1984-09-27 | Hitachi Ltd | Method for constituting television signal |
| DE3414452C1 (en) * | 1984-04-17 | 1985-10-10 | Robert Bosch Gmbh, 7000 Stuttgart | Method for compatibly transmitting a colour television signal containing additional information |
-
1989
- 1989-12-01 MY MYPI89001677A patent/MY104281A/en unknown
- 1989-12-02 EP EP90900842A patent/EP0447473A1/en not_active Ceased
- 1989-12-02 WO PCT/EP1989/001459 patent/WO1990006658A1/en not_active Application Discontinuation
- 1989-12-02 AU AU48208/90A patent/AU4820890A/en not_active Abandoned
- 1989-12-02 KR KR1019900701716A patent/KR910700592A/en not_active Application Discontinuation
- 1989-12-02 HU HU90923A patent/HUT60082A/en unknown
- 1989-12-02 JP JP2501452A patent/JPH04502243A/en active Pending
- 1989-12-05 CN CN89109077A patent/CN1015858B/en not_active Expired
- 1989-12-06 PT PT92500A patent/PT92500A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AU4820890A (en) | 1990-06-26 |
| WO1990006658A1 (en) | 1990-06-14 |
| PT92500A (en) | 1990-06-29 |
| CN1015858B (en) | 1992-03-11 |
| KR910700592A (en) | 1991-03-15 |
| HU900923D0 (en) | 1991-07-29 |
| JPH04502243A (en) | 1992-04-16 |
| EP0447473A1 (en) | 1991-09-25 |
| HUT60082A (en) | 1992-07-28 |
| MY104281A (en) | 1994-02-28 |
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Legal Events
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |