JPH01168182A - Pattern magnification television signal processor - Google Patents

Abstract

PURPOSE:To obtain a video image with a wide aspect ratio by an exclusive receiver and to receive the picture by the existing television receiver by producing a television signal sending multiplexedly other information in a band of the specification of the existing television broadcast. CONSTITUTION:A luminance signal Y obtained via a matrix circuit from a signal picked up by a camera larger than the existing aspect ratio enters a signal distributer 2 and is distributed into a time axis expansion circuit 3 and an adder 13. Similarly, a broad band color difference signal I and a narrow band color difference signal Q enter respectively signal distributers 5, 8 and are distributed to time axis expansion circuits 6, 9 and a balanced modulation circuit 12. Then a signal different from a television signal is superimposed in a residual side band of the television signal subject to residual side band amplitude modulation, or in a band symmetrical to the residual side band with respect to the carrier frequency of the residual side band amplitude modulation or in both the bands. Thus, the signal is received by the existing television receiver and the picture with wide aspect ratio is obtained by the exclusive receiver.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a television signal processing device for enlarging the picture frame by multiplexing and transmitting another signal on top of the current television broadcast signal to obtain wide aspect ratio video.

Conventional technology Japan's current NTSC (National Television Network)
System Komisote 4 (National Te1
e-vislon 5ysten+Coa+mltt
More than 25 years have passed since color television broadcasting using the ee)) system began in 1960. In the meantime, various new television systems have been proposed in response to demands for high-definition screens and improvements in the performance of television receivers. Furthermore, the content of the programs provided is changing from simple studio programs and relay programs to programs with higher quality and more realistic images, such as cinema-sized movie broadcasts.

Against this background, the Japan Broadcasting Corporation (NHK) proposed a high-definition television system. (For example, Literature Special Feature on High Definition Television (Television Society Journal Vol. 36,
No. 10, 1982)) The contents are: Number of scanning lines 1) 25, 2: Interlaced scanning, luminance signal horizontal bandwidth 20
MHz, and high definition, and from the viewpoint of visual engineering such as immersion, the aspect ratio (ratio of horizontal to vertical screen) was set to 5 =
3.

This system has already been almost completed in the closed system, and with the start of satellite broadcasting, the MUSE system (References, Tasuku Ninomiya et al.,
High-definition TV satellite 1-channel transmission system (MUSE)
(IEICE Technical Research Report It!84-72, 1
984)) and are currently conducting experiments.

On the other hand, current broadcasting uses 525 scanning lines, 2:1 interlaced scanning,
Luminance signal horizontal bandwidth 4.2MHz, aspect ratio 4:3
It has various specifications. (For example, refer to Literature and Broadcasting Technology Bibook, Color Television, edited by Japan Broadcasting Corporation, Japan Broadcasting Publishing Association, 1961.) When a movie is provided as the program, the screen size is adjusted to the aspect ratio of the current television receiver. Either the ends are cut off to make it 4:3, or invalid screens are placed at the top and bottom of the screen, and the aspect ratio of the valid screen is sent out to match the movie value.

Problems to be Solved by the Invention As mentioned above, when transmitting and servicing movie programs and immersive screens in current broadcasting, some parts of the screen are cut off or the screen area becomes smaller, so producers have to There was a problem in that the intention was not fully conveyed. Furthermore, if a signal with an aspect ratio larger than 4:3 is simply transmitted, it will not be able to be received by a normal receiver. When the number of scanning lines and frame frequency are the same as those of current broadcasting, in order to obtain the same horizontal resolution, an aspect ratio of m:3 (m is a real number of 4 or more) requires a video bandwidth m/4 times that of the current broadcasting.

However, from the point of view of effective use of radio wave resources, there is no point in expanding the transmission band unnecessarily. Furthermore, it goes without saying that current television receivers must be able to receive images with an aspect ratio of 4:3 without interference, as in the past.

The present invention has been made in view of the above, and includes a picture frame enlargement television signal synthesis device and a television signal synthesis device for generating a television signal that is compatible with current television systems and has a more horizontally elongated aspect ratio. The purpose of this invention is to provide a picture frame enlargement television signal processing device for reproducing images, and is characterized in that it causes little interference with current television receivers.

Means for Solving the Problems In order to solve the above problems, the television signal synthesis device of the present invention converts a part of the electrical signal obtained by capturing an original image having an aspect ratio larger than 4:3 into means for performing vestigial sideband amplitude modulation as a composite television signal after time axis expansion, and a frequency of a carrier wave within the vestigial sideband of the vestigial sideband amplitude modulated television signal or of the vestigial sideband amplitude modulation; A carrier wave having the same frequency as the carrier wave and having a phase difference of 90° is placed in a band symmetrical to the vestigial sideband or in both bands, and a composite television signal obtained from the remaining part of the electric signal is placed on the time axis. Double-sided band amplitude modulation is performed using an expanded and band-inverted multiplexed signal, and the vestigial sideband is multiplexed using an inverse Nyquist filter that has frequency characteristics opposite to those of the video intermediate frequency amplification stage of the receiver. It is also characterized by a means for compressing the time axis of the luminance signal, ① signal, and Q signal obtained by separating YC and color demodulating the television signal synchronously detected by the video carrier wave, and having the same frequency as the video carrier wave and a phase of 90°.
``It is characterized by comprising means for compressing the time axis of signals synchronously detected using different carrier waves and a filter for removing orthogonal distortion, and reproducing a video signal corresponding to an original image having the aspect ratio.

Effect of the Invention The present invention uses the above-described device to generate a television signal that enables multiplex transmission of different information within the band of the current television broadcasting standard, so that a dedicated receiver can transmit images of conventional television broadcasting. Not only that, but also multiplexed information can be obtained, that is, images with a wide aspect ratio can be obtained, and furthermore, even with current television receivers, it can be received as conventional television broadcast images with almost no problems. can.

EXAMPLE An example of the present invention will be described below with reference to the drawings. FIG. 2 (al indicates an example of a display screen of a current television; the second opening) shows a composite video signal for one scanning line period near the center of the screen. Since the aspect ratio is 4:3, part of the left and right circles among the three circles may be missing, as shown in the display example of FIG. 2(a).

Figure 3(a) shows an example of a display screen with a larger aspect ratio than the current one, for example 5:3.
FIG. 3(b) shows the video signal for one scanning line period near the center of the screen, and FIG. 3(C) shows the time axis scale as shown in FIG. 2(b).
), the video signal in FIG. 3(b) is rewritten and a synchronization signal and a color burst signal are added to show a composite video signal. Note that the aspect ratio is not limited to 5:3. If the aspect ratio is increased as shown in FIG. 3(a), more video information can be obtained than on the screen shown in FIG. 2(a). Here, even when the current television receiver receives a video signal with an aspect ratio of 5:3, it is possible to receive the image without any problems compared to conventional television receivers.In other words, in order to maintain compatibility, the current television receiver As can be seen by comparing Figure 2 (bl) and Figure 3 (C), this applies time-axis expansion to the television signal for the period displayed on the screen of ) is received by a current television receiver, it becomes a vertically elongated ellipse even though the original image is a circle, so it is necessary to extend the time axis of the signal in Figure 3 (C). .

In other words, when an original image is conventionally captured with a horizontal aspect ratio of m:3 (m is a real number of 4 or more), the image signal corresponding to the part displayed on the screen of a current television receiver is
/4 times the time axis should be expanded.

Furthermore, in order to obtain screen information with an aspect ratio of m:3, the remaining signal portion will be transmitted by frequency multiplexing.

FIG. 4 is a spectrum diagram showing a processing method of a television signal synthesis device according to an embodiment of the present invention. Figure 4 (
a) is a spectral diagram of a television signal subjected to residual sideband amplitude modulation in the current television system; Here, a case is shown in which the lower sideband of the video carrier wave P is a residual sideband. FIG. 4(b) is a multiplexed signal different from the television signal shown in FIG. 4(a), in which a carrier wave P2 having the same frequency as the video carrier wave P and a phase difference of 90'' is removed from the carrier wave Pg. The residual sideband amplitude is modulated as follows.If the carrier wave P2 is removed only during the retrace period and not during the video signal period, the DC component can also be multiplexed. Possible. Figure 4 (
In C), the double sideband amplitude modulation described above is changed to single sideband amplitude modulation. FIG. 4 fd) shows the double sideband amplitude modulation described above as vestigial sideband amplitude modulation.

FIG. 4(e) shows the signal in FIG. 4 (dl) multiplexed with the television signal in FIG. 4 (Ta), which is the television signal synthesized according to the present invention. In FIG. 4(e), the signal to be multiplexed is the signal in FIG. 4(d), but it may be the signal in FIG. 4(b) or FIG. 4(C).

In FIG. 1 (al is a block diagram of a television signal synthesis device according to an embodiment of the present invention. FIG. 1 Ta), 1 is the luminance obtained from a signal captured by a camera with a larger aspect ratio than the current one. 2.5 is an input terminal for the signal Y; 4 is an input terminal for the wideband color difference signal (2) obtained from the signal; 7 is an input terminal for the narrowband color difference signal Q obtained from the signal;
．． 8 is a signal splitter, 3.6.9.14 is a time axis expansion circuit, 1). 13.22 is an adder, 10.12 is a balanced modulation circuit, 5 is a signal generation circuit, 16 is an amplitude modulator, 17 is a first filter, 18 is an oscillator, 19 is a phase shifter, 20 is a modulator, 21 is a second filter, and 23 is a composite television signal output terminal. A luminance signal Y obtained from a signal captured by a camera with a larger aspect ratio than the current one through a matrix circuit or the like enters a signal distributor 2 and is distributed to a time axis expansion circuit 3 and an adder 13. Similarly, wideband color difference signal I
, and the narrowband color difference signal Q are sent to the signal splitter 5.8, respectively.
The signal is then distributed to the time base expansion circuit 6.9 and the balance modulation circuit 12. Time axis expansion can be performed, for example, by changing the write and read clocks to the memory. When an original image is conventionally captured with a horizontally elongated aspect ratio of m:3 (m is a real number of 4 or more), the image signal corresponding to the part displayed on the screen of a current television receiver is transferred to the time axis expansion circuit 3. .6.9 expands the time axis by m/4 times. Next, among the color difference signals distributed by the signal distributor 5.8, the remaining color difference signal components other than the color difference signal expanded by the time axis expansion circuit 6.9 are modulated by the balanced modulation circuit 12 and added to the adder 13.
Then, it is added to the remaining luminance components of the luminance signal other than the luminance signal expanded by the time axis expansion circuit 3. The output of the adder 13 is subjected to band compression by the time axis expansion circuit 14. The signal is further input to a modulator 25 and modulated by the output of an oscillator 26.

The band of the signal input to the modulator 25 is approximately IMHz, resulting in a spectrum as shown in FIG.
When the output of the modulator 25 is selected to be 1.2 MHz, the output of the modulator 25 changes from 0.2 MHz to 2.2 MHz centered on 1.2 MHz.
becomes. This is shown in FIG. 7(b). This output is input to the third filter 24. The third filter is a low-pass filter that provides -6 dB at 1.2 MHz. The signal that has passed through this third filter has a spectrum as shown in FIG. 7(C) and is input to the modulator 20.

Thus, for example, as shown here, 1 , 2 M
By performing band inversion processing on the Hz subcarrier in advance, it is possible to bring relatively high-energy low-frequency components to high frequencies, which not only reduces interference to conventional receivers, but also reduces the amount of energy contained in the original signal. It also has the advantage of being able to remove the direct current component and making carrier suppression modulation possible. The output signal of the time axis expansion circuit 6.9 is modulated by the balanced modulation circuit 10, and its output is combined with the output signal of the time axis expansion circuit 3, the synchronization signal from the signal generation circuit 15, the burst signal, and the composite television signal. An adder 1) adds an identification signal for identifying the currently broadcast television signal. For example, the identification signal can be superimposed on the vertical retrace period. The output of the adder 1) is used as a video baseband signal, and the output of the third filter 24 is used as a multiplexed signal. The carrier wave PI obtained from the oscillator 18 is amplitude-modulated by the amplitude modulator 16 using the video baseband signal output from the adder 1). The obtained amplitude modulated wave is band-limited by the first filter 17 to form a residual sideband, and then added to the adder 22 . A carrier wave P2 obtained by shifting the phase of the carrier wave P obtained from the oscillator 18 by 90 degrees by the phase shifter 19 is defined as a carrier wave P2. The multiplexed signal output from the third filter 24 is used to amplitude modulate the carrier wave Pt in both sidebands. During the retrace period, carrier wave P2 is removed. Although the phase shift direction of the phase shifter 19 may be fixed, for example, if the phase shift direction is changed every horizontal scanning period, every field, or every frame, it is possible to change the phase shift direction of the current television receiver. There will be even less interference. The output of the modulator 20 is band-limited by a second filter 21 and then applied to an adder 22 . The output of adder 22 becomes a composite television signal. That is, the multiplexed signal is superimposed on the video baseband signal to form a composite television signal. Furthermore, the second
Due to the frequency characteristics of the filter 21, the multiplexed signal becomes a signal having a band as shown in FIG. 4 (bl), FIG. 4 (C1), and FIG. 4 (dl).

Next, a television signal processing method on the receiving side will be explained. In the following, we will take the case of terrestrial broadcasting as an example. Figure 5 (a
1 is a block diagram of a current television receiver that performs video synchronous detection. 41 is an antenna, 42 is a tuner, 43 is a video intermediate frequency filter, 44 is a video detector, 45 is a carrier regeneration circuit, and 46 is a video baseband signal output terminal. A signal sent from the transmitting side is received by an antenna 41, frequency-converted to an intermediate frequency band by a tuner 42, and band-limited by a video intermediate frequency filter 43. The band-limited signal is supplied to a video detector 44 and a carrier recovery circuit 45. In the carrier wave regeneration circuit 45, carrier waves 1. Play. The band-limited signal is a carrier wave 1. The signal is detected by a video detector 44 and becomes a video baseband signal. Here, the frequency characteristics of the video intermediate frequency filter 43 will be described.

FIG. 5(b) shows the frequency characteristics.

That is, the amplitude is attenuated by 6 dB at video carrier wave 1), and video carrier wave 1. The Nyquist filter characteristic has an amplitude characteristic that is almost oddly symmetrical with respect to . On the other hand, as shown in Figure 4+d), if the multiplexed signal is band-limited by a filter with a frequency characteristic opposite to that of the video intermediate frequency filter of the receiver, then The signal component is almost double sideband.If this is expressed as a vector, it will be as shown in Figure 5 (C).Here, ■1 is the video carrier wave of the video baseband signal, and ■2 is the carrier wave of the multiplexed signal.1) These carrier waves have the same frequency but a phase difference of 90°. Since the video baseband signal has residual sidebands when considering the carrier wave I as the center, the upper and lower sidebands become vector a0 and vector aL, and when decomposed into orthogonal vectors, they become vector aI and vector a2. Also, since the multiplexed signal has almost both sidebands, the upper and lower sidebands are vector b
u, vector bL, their composite vector is b2
Therefore, only the components orthogonal to vector 1 are present. That is, when synchronous detection is performed using the carrier wave 1, no orthogonal distortion due to the vector aN and vector b2 components occurs, and in principle no interference by multiplexed signals occurs in current television receivers that perform video synchronous detection. If the signal to be multiplexed is a signal as shown in FIG. 4(b), it will not have double sidebands when band limited by the video intermediate frequency filter 43, so orthogonal distortion may occur. However, since the band of the multiplexed signal is inverted, the area near the carrier wave with a lot of orthogonal distortion becomes a signal with relatively low power wide-area components, so it is expected that there will be little noticeable interference. Multiplexing at a lower level would cause even less interference to current television receivers. Also, the signal to be multiplexed is the fourth one.
The same is true for the signal shown in Figure (C), but the degree of interference is even smaller due to the spectrum.

Next, a processing method of a television signal decoding apparatus according to an embodiment of the present invention will be described. The video intermediate frequency band signal output from the tuner is band-limited by a filter that removes orthogonal distortion, as shown in FIG. 6(a). When this is expressed as a vector, it becomes as shown in FIG. 6(b). The video baseband signal becomes substantially double-sideband due to the filter, so if the upper and lower sidebands are vector aU and vector at, their composite vector will be a, and only the component orthogonal to vector 2 will be present. Furthermore, since the multiplexed signal has residual sidebands when considering the carrier wave 2 as the center, the upper and lower sidebands become vector bL+ and vector bL, and when decomposed into orthogonal vectors, they become vector bl and vector bt. That is, when synchronous detection is performed using the carrier wave (2), no orthogonal distortion due to vector aI, vector b, and components occurs, and only the multiplexed signal components can be demodulated.

FIG. 1 is a block diagram of a television signal decoding device according to an embodiment of the present invention. FIG. 1 (in BL, 61 is an antenna, 62 is a tuner, 63 is a video intermediate frequency filter, 64 is a video detector, 65 is a carrier regeneration circuit, 66 is a filter, 67 is a phase shifter, and 68 is a multiple signal detector) , YC.77 is YC separation circuit, 72.73.74.7
6 is a time axis compression circuit that supports time axis expansion on the sending side;
71.78 is ■, Q demodulation circuit, 75 is signal switching circuit, 6
9 is a signal separation circuit, 81 is a subcarrier regeneration circuit, 82 is a detector, 79 is a matrix circuit, and 80 is an RlG, B signal output terminal. The signal sent from the transmitting side is sent to the antenna 6.
1, frequency-converted to an intermediate frequency band by a tuner 62, and band-limited by a video intermediate frequency filter 63.

The band-limited signal is supplied to a video detector 64 and a carrier recovery circuit 65.

The carrier wave regeneration circuit 65 regenerates the carrier wave 1 for synchronous detection. A band-limited signal is a carrier wave■.

The signal is synchronously detected by the video detector 64. The output of the video detector 64 is used as a video baseband signal. The output of the tuner 62 is band-limited by a filter 66 as shown in FIG.
Carrier wave whose phase is shifted by 90° from 1 by phase shifter 67■
2, the band-limited signal is synchronously detected in a multiple signal detector 68. Note that the phase shift direction of the carrier wave I8 is made to match that of the sending side. The detection output becomes a multiplexed signal. Note that even if the multiplexed signal is a signal like that shown in Figure 4 (bl) or Figure 4 (C), it can be demodulated in the same way.The video baseband signal is separated into a Y signal and a C signal by a YC separation circuit YC. separated into

The Y signal is time-axis compressed by the time-axis compression circuit 72 and becomes Y
1 signal. Further, the C signal is separated into an I signal and a C signal by an I and Q demodulation circuit 71. ■The signal is time-axis compressed by the time-axis compression circuit 73.■.

It becomes a signal. The C signal is time-base compressed by the time-base compression circuit 74 to become a QI times signal. The multiplexed signal is input to both a detector 82 and a subcarrier regeneration circuit 81 , and the subcarrier regeneration circuit 81 regenerates, for example, a 1.2 MHz subcarrier multiplexed on the transmission side and supplies it to the detector 82 . The detector 82 detects the multiplexed signal using a subcarrier, inverts the band, and reproduces the original signal. The output of the detector 82 is input to the time axis compression circuit 76. The time axis is compressed by the time axis compression circuit 76, and the output thereof is converted into the Y2 signal, 12 signal, and Q2 signal by the YC separation circuit 77 and I, Q demodulation circuit 78. Said YI, 1)
, Q3, Y2, It, Qz multiplied signals are input to the signal switching circuit 75, and here, for the part corresponding to the screen of a current television receiver with an aspect ratio of 4:3, Y, , I,
, Ql signals are selected, and since these are compressed on the time axis, for the remaining period of one horizontal scanning period, for the current broadcasting, blanking signals etc. are selected according to the contents of the signal switching circuit 75. When receiving the wide television signal, Y,,I! ,
Q. Let me select the signal. The output of the signal switching circuit 75 is converted into R, G, B signals by the matrix circuit 79. The time axis compression circuits 72, 73, 74, and 76 compress the time axis expanded part of the television signal that has a horizontally long aspect ratio so that the current television broadcasting can be received. This is for restoring the television signal.In other words, as can be seen by comparing Figure 2 (1)) and Figure 3 (C), the reception is performed so that the aspect ratio of the current broadcast image remains unchanged. In order to do this, it is necessary to compress the time axis of the current television signal. The compression ratio is determined by the aspect ratio. The signal separation circuit 69 separates a synchronization signal, a color burst signal, and an identification signal (these are not shown) for identifying the wide television signal and the current broadcast television signal from the video baseband signal, The signal switching circuit 75 is controlled using the identification signal. Please note that when receiving current television signals, the aspect ratio is 4:3.
It is sufficient to display the screen near the center, and to darken the screen by blanking or the like for the remaining area of the receiver screen having a horizontally long aspect ratio. Note that the identification signal is assumed to be superimposed on, for example, the vertical retrace period.

Note that the band of the time-axis expanded signal is expanded by time-axis compression on the receiving side, so the resolution does not decrease even if the aspect ratio increases.

Multiplexed signals corresponding to information on both sides that do not fit on a screen with an aspect ratio of 4:3 are almost canceled out by synchronous detection using a video carrier wave in current receivers, so there is almost no interference caused by multiplexed signals. Similarly to current receivers, receivers for multiplexed signal demodulation perform synchronous detection of the video baseband signal using filtered and phase-controlled video carrier waves, thereby eliminating the need for video signals that do not fit into the screen with an aspect ratio of 4:3. Multiplexed signals corresponding to side information can also be extracted without orthogonal distortion, and the 4
: Original images with an aspect ratio of 3 or more can be reproduced.

Effects of the Invention As is clear from the above description, within the vestigial sideband of the vestigial sideband amplitude modulated television signal or symmetrical to the vestigial sideband with respect to the frequency of the carrier wave of the vestigial sideband amplitude modulation. By superimposing a signal different from the television signal within the band or both bands, it is possible to multiplex another signal within the band of the current television system, and from the perspective of effective use of radio wave resources. However, it is very effective. It is also compatible with current television receivers, with almost no interference.

Furthermore, by extracting multiplexed signals without orthogonal distortion using a dedicated receiver, wide aspect ratio video can be obtained, and current television broadcasting can also be received without any problems.

[Brief explanation of the drawing]

FIG. 1(a) is a block diagram of a picture frame enlarged television signal synthesis device in an embodiment of the present invention, FIG. 1(b) is a block diagram of a picture frame enlarged television signal decoding device in an embodiment of the present invention, FIG. 2(a) is a front view showing an example of a display screen of a current television, FIG. 2(b) is a waveform diagram showing a composite video signal during one scanning line period near the center of the screen, and FIG. (
3(a) is a front view of an example of a display screen when the aspect ratio is set to, for example, 5:3; FIG. 3(b) is a waveform diagram showing a video signal during one scanning line period near the center of the screen; Figure (e
) is a waveform diagram showing a composite video signal in which the video signal shown in FIG. 3(b) is rewritten so that the time axis scale is equal to that in FIG. 2(b), and a synchronization signal and a color burst signal are added. Figure 4(a) is a spectrum diagram of a television signal subjected to vestigial sideband amplitude modulation in the current television system, Figure 4('b), Figure 4(e), Figure 4(dl is the original). FIG. 4(e) is a spectrum diagram in which the signal shown in FIG. 4(d) is modulated and band-limited by a signal different from the signal shown in FIG. 4(a) in one embodiment of the invention. Figure 5(a) is a block diagram of a current television receiver that performs video synchronous detection; Figures 5(b) and 5(C) are spectrum diagrams multiplexed with the signal in Figure (a). Spectrum diagram and vector diagram during synchronous detection of current television receivers, Fig. 6 (a), Fig. 6 (bl is the spectral diagram and vector diagram during multiplexed signal demodulation, Fig. 7 (a) is 1 Figure (a
7 (bl is FIG. 1 + a) is a spectrum diagram of the output signal of the modulator 25, and FIG. 7 (C) is a spectrum diagram of the output signal of the time axis expansion circuit 14 in FIG. 3 is a spectrum diagram of the output signal of the third filter 24. FIG. 3.6, 9.14... Time axis expansion circuit, 10.
12: Balanced modulation circuit, 19: Phase shifter, 25: Modulator, 17: First filter, 21: Old: Second Filter, 24...
Third filter, 67... Phase shifter, 63...
...Video intermediate frequency filter, 66...Filter, 72.73.74.76...Time axis compression circuit, 75...Signal switching circuit, 81... ...Subcarrier regeneration circuit, 82...Detector. Name of agent: Patent attorney Toshio Nakao 1 person Figure 2 Figure 3 □S53μδ□ Figure 4 Pl - Toru Fukikata Juntomo C - Color 1) 1 Transport 2 Pl - Aji-kari Transport (b) Pl (C) Pl (da) Pl (e) P, c3 α ward 9 U) Castle No. 5 ■1- Image Baribu c
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Claims (1)

[Claims] (1) A part of the electrical signal obtained by capturing an original image with an aspect ratio larger than 4:3 is subjected to time axis expansion and then converted into a composite television signal and modulated with residual sideband amplitude. means and within a vestigial sideband of said vestigial sideband amplitude modulated television signal or within or in a band symmetrical to said vestigial sideband with respect to the frequency of said vestigial sideband amplitude modulated carrier wave. , the composite television signal obtained from the remaining part of the electrical signal is expanded on the time axis using a carrier wave having the same frequency as the carrier wave and a phase difference of 90°, and the original high frequency component is converted to the low frequency band and the original low frequency component is A television signal synthesis device comprising means for superimposing signals modulated with band-inverted multiplex signals so that frequency components are in high frequencies, and generating a video signal corresponding to an original image having the aspect ratio. and a luminance signal obtained by separating YC and color demodulation from a television signal synchronously detected with a video carrier wave,
A means for time-base compressing the I signal and the Q signal, a means for time-base compressing a signal synchronously detected with a carrier wave having the same frequency as the video carrier wave and having a phase different by 90 degrees, and a filter for removing orthogonal distortion, A picture frame enlargement television signal processing device comprising a television signal decoding device which reproduces a video signal corresponding to an original image having the above aspect ratio. (2) The image frame enlargement television signal processing apparatus according to claim 1, wherein the signal modulated by the multiplexed signal is a signal subjected to carrier removal double-sided band amplitude modulation using the multiplexed signal. (3) The picture frame expanding television signal processing device according to claim 1, wherein the signal modulated by the multiplexed signal is a signal subjected to carrier removal single sideband amplitude modulation using the multiplexed signal. . (4) The picture frame expanding television signal processing device according to claim (1), wherein the signal modulated by the multiplexed signal is a signal subjected to carrier removal residual sideband amplitude modulation using the multiplexed signal. . (5) The signal modulated by the multiplexed signal is carrier-removed double-sideband amplitude modulated by the multiplexed signal, attenuated by half at the carrier frequency, and then passed through a Nyquist filter having amplitude characteristics oddly symmetrical with respect to the carrier frequency to generate a residual sideband. The image frame enlargement television signal processing apparatus according to claim (1), wherein the signal is a signal obtained by increasing the image frame. (6) The signal modulated by the multiplexed signal is amplitude-modulated in both sidebands by the multiplexed signal, attenuated by half at the carrier frequency, and made into vestigial sidebands by a Nyquist filter having amplitude characteristics that are oddly symmetrical with respect to the carrier frequency; The picture frame enlargement television signal processing device according to claim 1, wherein the signal is a signal with carrier wave removed during the retrace period.