JPH07212720A - Video signal transmission system, video signal recording and reproducing device, television receiver - Google Patents

Abstract

PURPOSE:To send a high definition video signal having a wide aspect ratio by a transmission system of an existing broadcast system by outputting a modulation auxiliary signal together with a luminance signal of a video signal in a composite or YC separate mode. CONSTITUTION:A helper demodulation circuit 81 of a video signal recording reproducing system 80 demodulates a modulation helper signal in a video signal of a PAL pulse system in a base band signal mode and outputs the demodulated signal to a YC separate circuit 82. The luminance signal and the helper signal in the base band signal mode from the YC separate circuit 82 are subjected to signal processing in a luminance signal system of a VTR signal processing system 83. A helper re-modulation circuit 84 applies AM modulation to a color subcarrier frequency signal based on the helper signal in the base band signal mode to generate a re-modulation helper signal. Then a video image synthesis circuit 85 applies frequency multiplexing to the reproduced luminance, the modulated helper signal and the recovered chrominance carrier signal and sends them as a decoded video signal.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a video signal transmission system,
The present invention relates to a video signal recording / reproducing device and a TV receiver.

[0002]

2. Description of the Related Art FIG. 11 is a diagram for explaining a reproduced image of PALplus, FIG. 12 is a diagram for explaining a basic algorithm for encoding PALplus, and FIG. 13 is PAL.
FIG. 14 is a diagram for explaining the basic decoding algorithm for plus, FIG. 14 is a diagram for explaining the operation of the basic decoding algorithm for PALplus, FIG. 15 is a diagram for explaining the recording system of the current VTR, and FIG. 16 is for the current VTR. FIG. 17 is a diagram for explaining a reproducing system, FIG. 17 is a frequency spectrum of an encoder video signal, FIG. 18 is a diagram for explaining a direct recording / reproducing operation of a broadcasting VTR, and FIG. 19 is a home VT.
FIG. 20 is a diagram for explaining the recording / reproducing operation of the R according to the YC separation system, and FIG. 20 is a diagram for explaining the operation of the YC separation system-compatible TV receiver connected to the home VTR.

The EDTV (Extended Defin) is compatible with the current broadcasting system and improves the shortcomings of the current system.
ition TV, high resolution TV). And as one of these technologies, PAL (Phase Alternation by Line)
Wide screen (16: 9
Image with the aspect ratio of
There is a "plus" method.

Although PALplus has introduced a wide screen display, it is the current broadcasting system of the PAL broadcasting system T.
This is made available for viewing on a V receiver (hereinafter, referred to as a current TV receiver), and for this reason, here, there are no images a2 and a3 above and below the current screen a1 obtained by reducing the widescreen original image. Is used to generate a widescreen original image a (illustrated in FIG. 11A). However, when the original image a widened by the letterbox method is received by a current TV receiver having an aspect ratio of 4: 3, the same image b (FIG. 11) is received.
(Shown in (B)), a wide-screen image c (shown in FIG. 11C) with reduced vertical resolution will be obtained when the image is received by a current TV receiver having an aspect ratio of 16: 9.

While PALplus looks similar to current TV receivers, PALplus-capable TV receivers (aspect ratio 16: 9) produce such vertical resolution when receiving images from current TV receivers with an aspect ratio of 16: 9. Based on the above-mentioned letterbox method, an auxiliary signal (hereinafter referred to as an auxiliary signal) for improving the definition of the main signal which is the widescreen image a1 is formed in the non-image parts a2 and a3 at the top and bottom of the screen. , Helper signal) is superimposed on the encoded video signal.

The PALplus encoding basic algorithm A is shown in FIG. That is, the TV camera 1 capable of picking up a widescreen image (aspect ratio 16: 9) uses the widescreen image signal (625 /
It outputs a 50/2: 1 system, that is, 625 scanning lines per frame (2 fields), 50 fields per minute, and a wide screen video signal in the interlaced scanning PAL broadcasting system. Then, this wide screen video signal of 575 effective scanning lines / frame output from the camera 1 is supplied to a vertical low-pass filter (vertical LPF) 2, where the number of scanning lines is converted (4-3 conversion). After being made into a main signal which is a wide-screen video signal of 431 effective scanning lines / frame, it is outputted to one input side of the video synthesizing circuit 3. The widescreen video signal output from the camera 1 is supplied to a vertical high-pass filter (vertical HPF) 4, where the scanning line number conversion (4
-1 conversion) to obtain a widescreen video signal with 144 effective scanning lines / frame, and then an AM modulation circuit (modulation)
5 is AM-modulated with the same frequency signal (4.43 MHz) as the color subcarrier frequency (color burst signal), and the level adjustment circuit (level adjustment) 6 has a small amplitude level (300
mVp-p), and then output to the other input side of the video synthesizing circuit 3 described above. As a result, the video synthesizing circuit 3 described above outputs the encoded video signal k obtained by synthesizing the main signal and the helper signal.

In this way, when the encoded video signal k encoded as described above is supplied to the current TV receiver (aspect ratio 4: 3), the effective scanning line is changed from 575 lines / frame to 431 lines / frame and the vertical resolution becomes The full screen d (illustrated in FIG. 11D) of the degraded main signal is seen. In the figure, d2 and d3 are parts without an image in which a helper signal is inserted. In this case, since the helper signal is AM-modulated with the same frequency signal as the color subcarrier frequency, the encoded video signal k in the current TV receiver is separated and output into the luminance signal (Y signal) and the color signal (C signal). In the Y / C separation circuit (not shown), the helper signal is almost regarded as the C signal and signal processing is performed, so that it is inconspicuous on the screen d. The color signal exists only on the main screen d1. In addition, the encoded video signal k described above is converted to PAL.
When supplied to a plus compatible TV receiver, the vertical resolution does not deteriorate due to the helper signal reinforcing its definition (that is, the widescreen video signal of 575 effective scanning lines output from the camera 1 described above). (With the same effective scanning line as the above), the full screen e (shown in FIG. 11E) of the main signal with high definition can be seen.

Now, the above-mentioned PALplus-compatible T
A video processing circuit of a well-known TV receiver (for example, a TV receiver 90 shown in FIG. 9 to be described later) by decoding the above-described encoded video signal k by a decoding basic algorithm B shown in FIG. Image receiving circuit 90d), switch SW9 (contacts s25, s26,
When receiving a screen e (shown in FIG. 11E) having an aspect ratio of 16: 9 via the movable contact s27), this algorithm B is complementary to the encoding basic algorithm A shown in FIG. It goes without saying that this is a typical configuration.

Here, the PALplus decoding basic algorithm B is shown in FIG. That is, when the above-mentioned encoded video signal k is supplied (for example, the encoded video signal k is received as a broadcast signal), this encoded video signal k is branched into a main signal system and a helper signal system. The encoded video signal k supplied to the main signal system is supplied to a vertical low-pass filter (scanning line number inverse conversion) 10 where scanning line number inverse conversion (3-4 conversion) is performed and effective from 431 effective scanning lines. A wide-screen video signal f (illustrated in FIG. 14A) of 575 scanning lines is output to one input side of the video synthesizing circuit 13. Waveforms f to h shown in FIGS. 14 (A) to 14 (C) respectively indicate a screen ka corresponding to the above-mentioned encoded video signal k (illustrated in FIG. 14 (D)).
The level changes in the vertical direction of the screen when the central portion is set to the “white” level and the upper and lower portions thereof are set to the “black” levels are shown. The encoded video signal supplied to the helper signal system is supplied to an AM demodulation circuit (demodulation) 11 where it is AM-demodulated and then supplied to a vertical high-pass filter (scan line number inverse conversion) 12 where the scan line number inverse conversion is performed. (1-4 conversion), and the wide screen video signal g from 144 effective scanning lines to 575 effective scanning lines (see FIG. 14).
(Shown in (B)) is output to the other input side of the video synthesizing circuit 13. The video synthesizing circuit 13 synthesizes a wide screen video signal f of 575 effective scanning lines of the main signal system and a wide screen video signal g of 575 effective scanning lines of the helper signal system to obtain a decoded video signal h (FIG. 14
(Illustrated in (C)) is output. As a result, the video synthesizing circuit 13 described above outputs the decoded video signal h obtained by synthesizing the main signal and the helper signal.

[0010]

Since the above-mentioned encoded video signal k which is a composite video signal is completely compatible with a broadcast signal in the past, a broadcast video tape recorder (hereinafter referred to as a broadcast VTR). Direct recording / reproduction is performed by a 1-inch format VTR, a D-2 type VTR, a D-3 type VTR, or the like. The input and output of these broadcast VTRs are compatible with composite video signals. That is, FIG.
As shown in FIG. 8, the broadcast VTR 100 includes a recording processing system 101 for the encoded composite video signal k, and a recording processing system 10 for the recording processing system 10.
1 is composed of a tape head system 102 including a video head for recording color signals output from 1 and a magnetic tape, and a reproduction processing system 103 for reproducing and outputting a reproduction signal from the tape head system 102 as an encoded video signal k. In this way, the encoded video signal k directly recorded / reproduced by the broadcasting VTR 100 is used by a PALplus-compatible TV.
By supplying to the image receiver 104, a high-definition screen e (illustrated in FIG. 11E) in which the definition of the main signal is reinforced by the encoded video signal k helper signal can be received.

On the other hand, the above-mentioned encoded video signal k is set to P
Consider a case of recording and reproducing with a home video tape recorder (hereinafter referred to as a current VTR) compatible with the AL broadcasting system.
Unlike the broadcast VTR 100 described above, the current VTR does not directly record / reproduce the encoded video signal k. That is,
As shown in FIG. 19, the current VTR 110 has a YC separation circuit 111 for separating the encoded video signal k into YCs.
A luminance signal recording system (Y recording system) 112 that outputs an FM-modulated luminance signal obtained by FM-modulating the luminance signal that is output from the C separation circuit 111, and the carrier color signal that is output from this YC separation circuit 111 is subjected to low frequency conversion. A color signal recording system (C recording system) 113 that outputs the low-pass conversion color signal obtained by the above, a frequency multiplexing circuit 114 that frequency-multiplexes the FM-modulated luminance signal and the low-pass conversion color signal, and outputs from the frequency multiplexing circuit 114. A tape head system 115 including a video head for recording frequency multiplexed signals and a magnetic tape, and the tape head system 115.
Luminance signal reproducing system (Y reproducing system) 116 for outputting a reproducing luminance signal based on a reproducing signal reproduced from the tape head system 115, and color signal reproducing for outputting a reproduction carrier color signal based on the reproducing signal reproduced from the tape head system 115. System (C reproduction system) 117,
It is composed of a synthesizing circuit 118 which reproduces and outputs an encoded video signal k as a reproduced composite video signal obtained by frequency-multiplexing these reproduction luminance signal and reproduction carrier color signal. In this way, when the encoded video signal k obtained by recording and reproducing in the current VTR 110 is supplied to the PALplus-compatible TV receiver 104 as a composite video signal, the wide screen image c is received.

Here, the frequency spectrum of the above-mentioned encoded video signal k will be described. The frequency spectrum of the encoded video signal k is, as shown in FIG. 17, a luminance signal k1, which constitutes the main signal of the encoded video signal k,
It is composed of each frequency spectrum portion of the color signal k2 and the AM-modulated helper signal k3. The lower limit frequency of the frequency spectrum of the luminance signal k1 is 0 MHz, and the upper limit frequency is about 5
It is a flat baseband characteristic having a maximum gain from 0 MHz to about 5 MHz, but the gain drops sharply before about 5 MHz. Color signal k
The frequency spectrum of 2 is centered on the color subcarrier frequency of 4.43 MHz, the lower limit frequency is about 1.3 MHz, and the upper limit frequency is about 5 MHz (4.43 MHz + 0.5 MHz).
, And the upper limit frequency is about 5 MHz, which is the same as the luminance signal k1. In the frequency spectrum of the helper signal k3, the lower limit frequency is 1.3 MHz (a value that is about 3 MHz lower than the color burst signal frequency described above), and the upper limit frequency is about 5 MHz, which is the same as the upper limit frequencies of the luminance signal k1 and the color signal k2. Frequency 4.4
3MHz VSB (Vestigal Side Band)
It is AM-modulated by the modulation.

Now, as described above, P shown in FIG.
Since the helper signal that constitutes the encoded video signal k output by the ALplus encoding basic algorithm A is AM-modulated at the color subcarrier frequency, the helper signal before modulation is originally the same as the luminance signal of the main signal and originally the luminance signal of the luminance signal. Despite its nature, the above-mentioned current VTR 110
When the encoded video signal k is recorded and reproduced by using, the helper signal is left as it is in the color signal system (color signal recording system 113
And the color signal reproduction system 117), the low-frequency conversion processing is performed here, and the signal band is narrow (± about 0.5 MHz), so that the band of the helper signal is extremely limited. In the reproduced video signal reproduced from the synthesis circuit 118 of the VTR 110, the helper signal having the property of the luminance signal does not have a sufficient frequency spectrum, whereby the fineness of the main signal in the reproduced video signal is improved. Degree cannot be augmented by this helper signal. Therefore, there is a problem that the encoded video signal k cannot be satisfactorily recorded and reproduced with good vertical resolution using the current VTR 110.

First, the structure of the recording / reproducing system of the current VTR will be described. The recording system of the current VTR is composed of a luminance signal recording system 20 and a color signal recording system 31 (the configuration shown in FIG. 14), and the reproducing system of the current VTR is composed of a luminance signal reproducing system 50 and a color signal reproducing system 62. (Fig. 16
Configuration shown in Fig.).

As shown in FIG. 15, the luminance signal recording system 20 includes a low-pass filter 21, a clamp circuit 22, a pre-emphasis circuit 23, a clipping circuit 24, an FM modulator 25,
The high-pass filter 26 (, YC mixing circuit 27, recording amplification circuit 28, rotary drum 29, video head 30) is roughly configured (here, the current VTR shown in FIG. 19 described above).
In the configuration of 110, one of the YC separation circuits 111 constitutes the low-pass filter 21, and the luminance signal recording system 112 constitutes the clamp circuit 22, the pre-emphasis circuit 23, the clipping circuit 24, and the FM modulator 25. , The high-pass filter 26, which corresponds to the frequency multiplexing circuit 114 is Y
The C mixing circuit 27, and what constitutes the tape head system 115 are a recording amplification circuit 28, a rotary drum 29, a video head 30, pre-amplification circuits 51 and 52, which will be described later, and a switch circuit 53).

As shown in FIG. 16, the color signal recording system 31 includes a bandpass filter 32, an ACC circuit 33, a burst signal amplification circuit 34, a frequency conversion circuit 35, and a low pass filter 3.
6, burst signal separation circuit 37, bandpass filter 38, oscillator 39, sub-frequency conversion circuit 40, 90 ° phase shifter 4
1, an oscillator 42, and a horizontal sync separation circuit 43 (generally, the current VTR 11 shown in FIG.
In the configuration of 0, the other one of the YC separation circuit 111 is a bandpass filter 32, and the color signal recording system 113 is an ACC circuit 33, a burst signal amplification circuit 34, a frequency conversion circuit 35, a low-pass filter. 36, burst signal separation circuit 37, bandpass filter 38, oscillator 39, sub-frequency conversion circuit 40, 90 ° phase shifter 41, oscillator 42, and horizontal synchronization separation circuit 43).

The luminance signal reproducing system 50, as shown in FIG.
4, dropout compensation circuit 55, limiter circuit 56,
FM demodulator 57, low-pass filter 58, de-emphasis circuit 59, noise canceling circuit 60 (, YC mixing circuit 61)
(Here, in the configuration of the current VTR 110 shown in FIG. 19 described above, the luminance signal reproducing system 116 constitutes the high-pass filter 54, the dropout compensation circuit 55, the limiter circuit 56, the FM demodulator. 57, low-pass filter 58, de-emphasis circuit 59, noise canceling circuit 6
0, and corresponding to the combining circuit 118 is the YC mixing circuit 61).

As shown in FIG. 16, the color signal reproduction system 62 includes a low pass filter 63, an ACC circuit 64, a frequency conversion circuit 65, a bandpass filter 66, and a burst signal attenuation circuit 6.
7, crosstalk removal circuit 68, bandpass filter 69, horizontal sync separation circuit 70, VCO 71, 90 ° phase shifter 7
2, a sub-frequency conversion circuit 73, a VXO 74, a phase comparison circuit 75, a burst signal separation circuit 76, and a crystal oscillator 77 (here, the color signal reproduction system in the configuration of the current VTR 110 shown in FIG. 19 described above. 117 corresponds to the color signal reproduction system 62).

Next, recording / reproducing of the encoded video signal k using the current VTR having the above-mentioned structure will be described. (During recording) When the encoded video signal k is supplied to the video signal input side of the current VTR, the low-pass filter 21 having a cutoff frequency of about 3 MHz provided in the input stage of the luminance signal recording system 20 causes the encoded video signal A part of the luminance signal and the helper signal of the main signal forming k is taken out and output to the clamp circuit 22. The clamp circuit 22 DC-reproduces the supplied luminance signal and helper signal, and performs signal processing so that the frequency of the leading edge of the synchronizing signal of the luminance signal becomes a predetermined frequency, and outputs the obtained signal to the pre-emphasis circuit 23. The pre-emphasis circuit 23 performs S before the FM modulation.
The luminance signal and the helper signal, which have been subjected to pre-emphasis processing for emphasizing the contour of the high frequency image in order to improve / N, are output to the clip circuit 24. The clip circuit 24 outputs the luminance signal and the helper signal obtained by performing white and dark clipping to limit the frequency range of FM modulation to prevent black and white inversion, and FM modulation is performed there.
The FM-modulated luminance signal and F output from the FM modulator 25
The M-modulation helper signal is output to the YC mixing circuit 27 after removing the sidebands of the FM-modulation luminance signal and the FM-modulation helper signal by the high-pass filter 26, which is the output stage of the color signal recording system 31 described above. The low-pass conversion color signal and the low-pass conversion helper signal output from the low-pass filter 36 are frequency-multiplexed, the signal level is amplified by the recording amplifier 28 by a predetermined amount, and then the rotary drum 29 is rotated by a predetermined angle range (180).
Recording is performed by sequentially forming signal tracks in a helical scan shape on a magnetic tape (not shown) by a set of recording / reproducing video heads 30 mounted so as to face each other at a angle of (°).

At the same time, when the encoded video signal k is supplied to the video signal input side of the current VTR, the band is centered on the color subcarrier frequency of 4.43 MHz provided at the input stage of the color signal recording system 31. The band-pass filter 32 having a width of about 0.5 MHz takes out most of the carrier color signal and the AM modulation helper signal forming the encoded video signal k,
Output to the ACC circuit 33. The ACC circuit 33 sets the levels of these signals supplied from the bandpass filter 32 to constant values and supplies them to the burst signal amplification circuit 34 and the burst signal separation circuit 37, respectively. The burst signal amplifier circuit 34 amplifies only the carrier color signal and the color burst signal of the AM modulation helper signal in order to improve the S / N at the time of reproduction, and the carrier color signal and the AM modulation helper signal obtained by the frequency conversion circuit 3
Output to 5. The frequency conversion circuit 35 uses the carrier color signal and A
The low-pass conversion color signal obtained by low-pass converting the M-modulation helper signal into a lower-pass frequency that is easier to record is output to the low-pass filter 36. The low-pass filter 36 outputs the low-pass conversion color signal and the low-pass conversion helper signal obtained by removing the unnecessary high-pass signal components to the YC mixing circuit 27. On the other hand, the burst signal separation circuit 37 separates the color burst signal separated from the carrier color signal (and the AM modulation helper signal) into the oscillator 39.
Supply to. The oscillator 39 outputs the reference oscillation signal synchronized with the color burst signal to the sub frequency conversion circuit 40. The horizontal sync separation circuit 43 outputs the horizontal sync signal obtained by separating the encoded video signal k to the oscillator 42. The oscillator 42 outputs to the 90 ° phase shifter 41 a low-pass conversion frequency signal of about 4 times based on the supplied horizontal synchronizing signal. 9
The 0 ° phase shifter 41 outputs a signal whose phase is rotated by 90 ° for each horizontal scanning period to the sub frequency conversion circuit 40 in order to prevent interference with an adjacent signal track during reproduction. The sub frequency conversion circuit 40 adds the reference burst signal supplied from the oscillator 39 and the 90 ° phase shifter 41, respectively, and the low frequency conversion frequency signal of about 4 times the phase rotated by 90 ° for each horizontal scanning period. The obtained signal is output to the bandpass filter 38. The bandpass filter 38 outputs only the low-frequency carrier signal of the required band to the frequency conversion circuit 35. Thus, the encoded video signal k can be recorded using the current VTR.

(At the time of reproducing) Now, the recording signal recorded on the magnetic tape (not shown) by the above-mentioned luminance signal recording system 20 and color signal recording system 31 of the current VTR is reproduced by the luminance signal reproducing system 5.
Reproduction by the 0 and color signal reproduction system 62 will be described below. In the luminance signal reproducing system 50, the signals reproduced from the recording signals recorded on the magnetic tape (not shown) by the pair of video heads 30 are supplied to the preamplifiers 51 and 52 through the rotary drum 29, respectively, and the predetermined amounts are supplied here. After being amplified
A continuous reproduction signal is obtained by switching in synchronization with the drum pulse by the switch circuit 53. The reproduction signal output from the switch circuit 53 is output to the high-pass filter 54 and the low-pass filter 63 of the color signal reproduction system 62, respectively. The high-pass filter 54 outputs the reproduced FM-modulated luminance signal and the reproduced FM-modulated helper signal having high frequencies from the reproduced signal to the dropout compensation circuit 55. The dropout compensation circuit 55 is set to 1 when a signal is lost due to scratches on the magnetic tape.
The reproduced FM-modulated luminance signal and the reproduced FM-modulated helper signal, which have been subjected to dropout compensation in place of the signal content of the preceding scanning line, are output to the limiter circuit 56. The limiter circuit 56 performs a limiter for removing level fluctuations of the reproduced FM-modulated luminance signal and the reproduced FM-modulated helper signal. The FM demodulator 57 low-pass filters the reproduction luminance signal and the reproduction helper signal obtained by performing FM demodulation of the reproduction FM-modulated luminance signal and the reproduction FM-modulated helper signal output from the limiter circuit 56.
Output to 8. The low-pass filter 58 outputs to the de-emphasis circuit 59 the reproduction luminance signal and the reproduction helper signal obtained by removing the high frequency carrier component contained in the reproduction luminance signal and the reproduction helper signal. The de-emphasis circuit 59 restores the high frequency component whose level has been increased during recording. The noise elimination circuit 60 outputs the reproduction luminance signal and the reproduction helper signal obtained by eliminating the noise distributed in the high frequency range of the reproduction luminance signal and the reproduction helper signal supplied from the de-emphasis circuit 59 to the YC mixing circuit 61.

At the same time, when the above-mentioned reproduction signal is supplied from the switch circuit 53 to the low-pass filter 63 of the color signal reproduction system 62, the reproduction low-pass converted color signal and the reproduction low-pass having a low frequency are reproduced from the reproduction signal. The conversion helper signal is output to the ACC circuit 64. The ACC circuit 64 outputs the reproduced low-frequency converted color signal and the reproduced low-frequency converted helper signal obtained by keeping the level constant to the frequency conversion circuit 65. Frequency conversion circuit 6
Reference numeral 5 denotes a bandpass filter 66 for the reproduced carrier color signal and the reproduced AM-modulated helper signal obtained by inversely converting the reproduced low-pass converted color signal and the reproduced low-pass converted helper signal into color subcarrier frequencies.
Output to. The bandpass filter 66 outputs the reproduction carrier color signal and the reproduction AM modulation helper signal having a required bandwidth centering on the color subcarrier frequency of the reproduction carrier color signal and the reproduction AM modulation helper signal to the burst signal attenuating circuit 67. Since the burst signal attenuating circuit 67 raised the burst signal level during recording, it returns it to the original level. Reproduction carrier color signal and reproduction A output from the burst signal attenuation circuit 67
The M modulation helper signal is supplied to the crosstalk removing circuit 68, where the reproduced carrier color signal and the reproduced AM modulation helper signal obtained by removing the crosstalk component from the adjacent signal track are the YC mixing circuit 61 and the burst signal described above. It is output to the separation circuit 76, respectively. The reproduction carrier color signal and the reproduction AM modulation helper signal output to the YC mixing circuit 61 are reproduced and output here as a composite video signal obtained by frequency multiplexing with the reproduction luminance signal and the reproduction helper signal, that is, the encoded video signal k. On the other hand, the reproduction carrier color signal supplied to the burst signal separation circuit 76 outputs the color burst signal separated from the reproduction carrier color signal to the phase comparison circuit 75. The phase comparator circuit 75 is also supplied with an oscillation signal from a crystal oscillator 77 that outputs an oscillation signal that serves as a reference signal during reproduction. The phase comparison circuit 75 detects the detection signal obtained by detecting the phase shift between the reference signal from the crystal oscillator 77 and the color burst signal from the burst signal separation circuit 76 as VXO.
Output to (variable crystal oscillator) 74.
The VXO 75 outputs an oscillation signal whose phase is controlled according to this detection signal to the sub frequency conversion circuit 73.
The horizontal sync separation circuit 70 outputs to the oscillator 71 the horizontal sync signal obtained by separating from the reproduction brightness signal output from the noise elimination circuit 60 of the brightness signal reproduction system 50 described above. The oscillator 71 outputs to the 90 ° phase shifter 72 a low-pass conversion frequency signal that is about four times higher, based on the supplied horizontal synchronizing signal. 90
The phase shifter 72 outputs a signal whose phase is rotated by 90 ° for each horizontal scanning period to the sub frequency conversion circuit 73 in order to prevent interference with an adjacent signal track during reproduction. The sub-frequency conversion circuit 73 adds the oscillation signal supplied from the oscillator 74 and the 90 ° phase shifter 72, respectively, and the low-frequency conversion frequency signal of about 4 times that is 90 ° in phase for each horizontal scanning period and includes jitter. The signal thus obtained is output to the bandpass filter 69.
The bandpass filter 69 outputs only a carrier wave of a required band having jitter to the frequency conversion circuit 65.

Thus, the encoded video signal k can be recorded and reproduced using the current VTR. As described above, the encoded video signal k output by the PALplus encoding basic algorithm A shown in FIG. 12 is used. The constituent helper signals are AM-modulated at the color subcarrier frequency, so when recording and reproducing the encoded video signal k using the current VTR, the helper signals are branched to the color signal system, and the low frequency conversion is performed here. The bandwidth of the helper signal is extremely limited because it is processed and the signal band is narrow (± 0.5 MHz).
In the encoded video signal k reproduced from R, the helper signal having the property of the luminance signal does not have a sufficient frequency spectrum, so that the definition of the main signal is sufficiently increased by this helper signal. Cannot be reinforced. On the other hand, a part of the helper signal that has passed through the luminance signal system cannot be successfully combined with the helper signal that has passed through the chrominance signal system due to signal deterioration specific to the VTR, such as gain distortion, phase distortion, and jitter. Therefore, there is a problem that the encoded video signal k cannot be recorded / reproduced with good vertical resolution using the current VTR.

As a high-quality video transmission system, a YC separation input / output system (so-called connection system using S terminal) in which a luminance signal and a carrier color signal obtained by separating a composite video signal are transmitted by a dedicated transmission system. There is. The YC separation input / output method does not require frequency separation when separating the luminance signal and the carrier color signal from the composite video signal and the processing of frequency-multiplexing the luminance signal and the carrier color signal to generate the composite video signal. Therefore, it is possible to avoid the deterioration of the signal caused by such processing, and it is possible to transmit (record / reproduce) high quality video. This YC separation input / output method is also used in the above-mentioned current VTR 110, and the current VTR 110 and the current TV receiver 104A are connected using the S terminal.

That is, as shown in FIG. 20, the current VTR1
The reproduction luminance signal output from the luminance signal reproduction system (Y system reproduction processing) 116 of 10 does not pass through the synthesizing circuit 118, but from the Y output terminal 119a, which is one of the S terminals, through the connection line, the current TV receiver 104A. Is supplied to the Y input terminal 119b which is one of the S terminals. Thus, the current VT
The reproduction luminance signal supplied from the R110 side to the current TV receiver 104A side is supplied to the signal processing circuit 122 via the movable contact s12 of the switch SW11 which is switched to the contact s11 side by the input switching signal. Similarly, the current V
The reproduction carrier color signal output from the color signal reproduction system (C system reproduction processing) 117 of the TR 110 is not passed through the synthesizing circuit 118, but is passed through the connection line from the C output terminal 120a which is the other of the S terminals to the current TV receiver. It is supplied to the C input terminal 120b which is the other S terminal of 104A. In this way, the reproduction carrier color signal supplied from the current VTR 110 side to the current TV receiver 104A side is switched to the contact s14 side by the input switching signal, and the movable contact s1 of the switch SW12.
It is supplied to the above-mentioned signal processing circuit 122 via 5.
The signal processing circuit 122 generates primary color signals (R, G, B) based on the supplied reproduction luminance signal and reproduction carrier color signal and outputs them to a CRT (not shown).

In this way, the current TV receiver 104A can receive a high quality image of the image reproduced from the current VTR 110 on a screen having an aspect ratio of 4: 3. By the way, if the composite connection method using the composite terminal is used instead of the connection method using the S terminal, the switch S
This is possible by switching W11 and SW12 to the output side of the YC separation circuit 123 described later. That is, the reproduced composite video signal output from the synthesizing circuit 118 of the current VTR 110 is supplied from the composite output terminal 121a to the composite input terminal 121b of the TV receiver 104A through the connecting line, and the YC separation circuit 123 on the TV receiver 104A side. The reproduction luminance signal and the reproduction carrier color signal obtained by frequency-separating and outputting the reproduction composite video signal with the switch SW1
By supplying the contact s13 of No. 1 and the contact s16 of SW12, respectively, the current TV receiver 104A can be connected to the current VTR.
The image reproduced from 110 can be received with a normal image quality on a screen having an aspect ratio of 4: 3. Thus, by using the above-mentioned YC separation input / output system as the interface system between the current VTR 110 and the current TV receiver 104A, the video signal of the current broadcasting system reproduced from the current VTR 110 can be displayed in high quality on the current TV receiver 104A. The image can be received.

By the way, a signal format for using the above-mentioned YC separation input / output system (so-called connection system using S terminal) is defined (standardized) as a high-quality video transmission system in the PAL broadcasting system. On the other hand, P
No definition is made as a high-quality video transmission system in the ALplus broadcasting system.

Therefore, the following problems (1) to (1) to cope with the high-quality video transmission system in the PALplus broadcasting system are to be taken.
(3) was required. (1) Transmit the video signal of the PALplus broadcasting system by using the YC separation input / output system (2) PA transmitted by the YC input separation system
VTR for recording a video signal of the Lplus broadcasting system and transmitting a video signal to be reproduced by the YC output separation system (3) PA transmitted by the YC input separation system
TV receiver for receiving Lplus broadcasting system video signals

[0029]

In order to solve the above problems, the present invention provides a video signal transmission system having the following configuration,
Provided are a video signal recording / reproducing device and a TV receiver.

(1) At least a main part that transmits a series of high-definition video signals having an aspect ratio different from the aspect ratio of the predetermined broadcasting system, is compatible with the predetermined broadcasting system, and constitutes the high-definition video signal. A video signal provided with a modulated auxiliary signal obtained by modulating the auxiliary signal in a required manner among the auxiliary signals in the baseband signal manner including the signal and the video additional information by using the signal transmission system of the predetermined broadcasting system. Video signal transmission system for transmission, which is a composite or Y
A video signal transmission system, wherein when the video signal input in the C separation mode is output in a composite or YC separation mode, the modulation auxiliary signal is output together with the luminance signal of the video signal in the YC separation mode.

(2) At least a main part that transmits a series of high-definition video signals having an aspect ratio different from the aspect ratio of the predetermined broadcasting system, is compatible with the predetermined broadcasting system, and constitutes the high-definition video signal. A video signal for recording and reproducing by a predetermined broadcasting system a video signal including a signal and video additional information and a modulated auxiliary signal obtained by modulating the auxiliary signal in a required mode among auxiliary signals in a baseband signal mode. A recording / reproducing apparatus, recording means for recording an auxiliary signal obtained by demodulating the modulated auxiliary signal in a baseband signal mode by using a brightness signal recording system for recording a brightness signal relating to the video signal; Reproduction means for re-modulating the auxiliary signal reproduced from the signal reproduction system in the required manner to output as the modulated auxiliary signal, the composite video signal or the YC component of the video signal. A video signal recording / reproducing apparatus, characterized in that, when inputting / outputting in a separation mode, the modulation auxiliary signal is input / output together with a luminance signal of the video signal in a YC separation mode.

(3) A TV receiver for receiving an image according to the video signal supplied in a composite or YC separation mode from the video signal recording / reproducing device according to (2) above.
A TV comprising demodulation means for outputting an auxiliary signal obtained by demodulating the modulated auxiliary signal supplied together with the luminance signal of the video signal supplied in the composite or YC separation form into a baseband signal form. Receiver.

[0033]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a video signal transmission system according to the present invention,
A video signal recording / reproducing apparatus and a TV receiver will be described with reference to FIGS. FIG. 1 is a block diagram of an embodiment of a video signal transmission system according to the present invention, FIG. 2 is a block diagram of an embodiment of a helper demodulation circuit which constitutes the video signal transmission system, and FIG. 3 is a helper reproduction circuit which constitutes the video signal transmission system. FIG. 4 is a diagram for explaining the block configuration of the first embodiment of the modulation circuit.
Is a diagram for explaining the operation of the helper remodulation circuit, and FIG.
6 is a waveform diagram of a demodulation helper signal, FIG. 6 is a waveform diagram of a remodulation helper signal, and FIG. 7 is a block diagram of an embodiment of a recording system of a video signal recording / reproducing apparatus according to the present invention. 8 is a block diagram of an embodiment of a reproducing system of a video signal recording / reproducing apparatus according to the present invention, FIG. 9 is a block diagram of an embodiment of a TV receiver according to the present invention, and FIG. 10 is a frequency spectrum of a demodulation helper signal. .

As shown in FIG. 1, the video signal transmission system according to the present invention has an aspect ratio (4:
3) Transmits (sends / receives, records / plays) a PALplus video signal, which is a series of high-quality video signals having an aspect ratio (16: 9) different from that of 3), and is compatible with the PAL broadcasting system. At least a main signal and video additional information (PALpl) that configures a PALplus video signal.
Specific horizontal line of the video signal of the us system (for example,
(H) A signaling bit in which various video additional information including identification information of aspect ratio is stored in the effective video area, and main signal and helper signal reference amplitude information which are video additional information different from this are provided. PALplus system video signal including a modulated helper signal obtained by AM-modulating a color subcarrier frequency (4.43 MHz) with a helper signal in a baseband signal mode (shown in FIG. 10) including video additional information). A video signal transmission system 80 for transmitting using a broadcast signal transmission system, which is a luminance signal transmission system for transmitting a PALplus system video signal (the luminance signal recording system 20 shown in FIG. 15 and the luminance signal recording system shown in FIG. 16). This is a system for transmitting a modulation helper signal using a signal reproduction system 50), and uses a composite mode (composite connection method, composite connection terminal). Or YC separation aspect upon the video signal of the PALplus system to enter (YC separation input method, the S terminal used) for outputting a composite or YC separation aspects,
Modulate helper signal to PALplus in YC separation mode
This is a system that outputs together with the luminance signal of the s system video signal.

Further, the video signal recording / reproducing apparatus 80A according to the present invention, as shown in FIGS. 7 and 8, respectively, obtains a helper signal obtained by demodulating a modulated helper signal into a baseband signal mode in a PALplus system video. The recording means (VTR recording system 86) for recording using the luminance signal recording system for recording the luminance signal relating to the signal, and the helper signal in the baseband signal form reproduced from the luminance signal reproduction system 50, the color subcarrier frequency ( Reproducing means (VTR reproducing system 8) for outputting as a helper signal obtained by re-modulating 4.43 MHz by AM.
8) and when inputting / outputting a PALplus system video signal in the above-described composite mode or YC separation mode, the modulation helper signal is used in the YC separation mode.
It is a device that inputs and outputs together with the luminance signal of the video signal of the system.

Further, the TV receiver 90 according to the present invention is
As shown in FIG. 9, the above-described video signal recording / reproducing device 80.
PALpl supplied from A in a composite or YC separation mode
A TV receiver for receiving an image corresponding to a video signal of the us broadcasting system, which is supplied in a composite or YC separation mode.
A helper demodulation circuit (demodulation means) 90b is provided which outputs a demodulation helper signal obtained by demodulating the modulation helper signal supplied together with the luminance signal of the ALplus broadcasting video signal into a baseband signal mode.

First, (1) the definition of transmitting a video signal of the PALplus broadcasting system using the YC separation input / output system will be defined. That is, the luminance signal transmission system of the video signal transmission system is used to transmit the luminance signal and the modulation helper signal forming the main signal, and the color signal transmission system is used to form the main signal of the color signal and the color burst signal. Is transmitted. Also, this transmission is mainly for VTR.
-VTR and VTR-TV receiver.

Now, the helper demodulation circuit 81, which constitutes the video signal transmission system 80, is transmitted to the transmitted PAL.
A modulation helper signal that constitutes a video signal of the plus system (that is, the encoded video signal k encoded by the PALplus encoding basic algorithm A shown in FIG. 12) and is AM-modulated at the color subcarrier frequency as described above. Is output to the YC separation circuit 82 at the next stage (the frequency spectrum is shown in FIG. 10).

The YC separation circuit 82 is a helper demodulation circuit 8
The video signal supplied from the helper demodulation circuit 81 is a low-pass filter similar to the low-pass filter 21 having the cut-off frequency of about 3 MHz shown in FIG. Only the carrier color signals that make up the signals are extracted.
The signal separation circuit is composed of a band filter similar to the band filter 32 provided at the input stage of the color signal recording system 31 having a band width of about 0.5 MHz centering on the color subcarrier frequency of 43 MHz. Then, at the time of YC separated output,
Most of the luminance signal and the helper signal in the baseband signal form which constitute the main signal relating to the video signal supplied from the helper demodulation circuit 81 are output from the above low-pass filter, and the carrier color signal which constitutes the main signal. Only output from the bandpass filter described above. Thus, the YC separation circuit 8
Since most of the helper signals in the baseband signal form are output from the low-pass filter that constitutes the baseband 2, the helper signal in the baseband signal form is VTR as described later.
Almost all of the signal processing is performed by the luminance signal system in the signal processing system 83 (the same configuration as the luminance signal recording system 20 and the luminance signal reproducing system 50 shown in FIG. 15 described above).

The VTR signal processing system 83 is shown in FIG.
5, the luminance of the same configuration as the luminance signal system (luminance signal recording system 20, luminance signal reproducing system 50) and color signal system (color signal recording system 31, color signal reproducing system 62) of the current VTR shown in FIG. The luminance signal recording system 20, which includes a luminance signal and a baseband signal type helper signal, which are composed of a color signal system and constitute a main signal relating to a video signal supplied from the YC separation circuit 82,
A carrier color signal (color signal + color burst signal) that constitutes a main signal while recording and reproducing is performed by the luminance signal reproducing system 50
Is recorded and reproduced by a color signal recording system 31 and a color signal reproducing system 62. The description of the recording / reproducing process of the video signal will be made with reference to the luminance signal system (luminance signal recording system 20, luminance signal reproducing system 50) and color signal system (color signal recording) of the current VTR shown in FIGS. 15 and 16, respectively. Since the operation is the same as that of the system 31 and the color signal reproduction system 62), description thereof will be omitted here.

The helper remodulation circuit 84 is supplied with the reproduced video signal output from the VTR signal processing system 83 (that is, the reproduced video signals separately output from the luminance signal reproduction system 50 and the chrominance signal reproduction system 62, respectively. The constituent reproduction luminance signal and reproduction carrier color signal are supplied). Then, the same method as that for generating the above-mentioned modulated helper signal is used for the helper signal of the baseband signal mode included in the reproduction luminance signal, that is, the color subcarrier frequency is AM-modulated with the helper signal of the baseband signal mode and modulated. The re-modulated helper signal obtained by the AM re-modulation is generated by the same method as that for generating the helper signal.

Thus, the video signal transmission system 80 has P
When transmitting an ALplus video signal, a reproduction luminance signal output from the helper remodulation circuit 84 (that is,
(Playback luminance signal and modulated helper signal that compose the main signal)
And the reproduction carrier color signal (that is, the color signal + color burst signal forming the main signal) output from the color signal reproduction system 62 can be independently output by the YC separation method. In this case, PAL is a composite video signal obtained by frequency-multiplexing the reproduction luminance signal and the reproduction carrier color signal in the YC mixing circuit 85 (corresponding to the YC mixing circuit 61).
It goes without saying that a plus type video signal can be output.

In the video signal transmission system 80 shown in FIG. 1 described above, it is described that only the YC separation circuit 82 and the VTR signal processing system 83 constitute a VTR compatible with the PAL broadcasting system. Transmission system 80
Helper demodulation circuit 81 and YC separation circuit 8
Of course, it is possible to configure a VTR compatible with the PAL broadcasting system, which includes all of the VTR signal processing system 83 and the helper remodulation circuit 84.

In the video signal recording / reproducing system 80 shown in FIG. 1, the helper demodulating circuit 81 and the helper remodulating circuit 84 can of course be configured as a video signal modulating / demodulating device.

Now, the circuit configuration and operation of the helper demodulation circuit 81 which constitutes the video signal transmission system 80 shown in FIG. 1 will be described with reference to FIG. The helper demodulation circuit 81 includes a helper signal extraction circuit (signal extraction) 81a, a helper signal demodulation circuit (demodulation) 81b, a reference level synthesis circuit 81c, and a burst signal extraction circuit (burst extraction) 81.
d, an APC circuit 81e, an oscillation circuit 81f, a horizontal sync separation circuit 81g, a helper signal line detection circuit (helper line detection) 81h, and a switch SW1.

Next, the operation of the helper demodulation circuit 81 will be described. First, the transmitted PALplus video signal (that is, the encoded video signal k encoded by the PALplus encoding basic algorithm A shown in FIG. 12 described above) is the helper signal extraction circuit 81.
a, burst signal sampling circuit 81d, horizontal sync separation circuit 8
1 g is supplied to each contact s1 of the switch SW1. The helper signal extracting circuit 81a extracts only the AM-modulated helper signal from the applied video signal,
This modulated helper signal is sent to the helper signal demodulation circuit 8 in the next stage.
Output to 1b. Then, the AM demodulated and gain-adjusted helper signal in the baseband signal mode is combined with a predetermined level (about 50 IRE) in the reference level combining circuit 81c, and then output to the other contact s2 of the switch SW1.

The movable contact s3 of the switch SW1 is always switched to the contact s1 side and transmitted to the PALplus.
The video signal of the s method is output as it is (through) to the YC separation circuit image 82 of the next stage via the movable contact s3. Further, while a detection signal is being output from a helper signal line detection circuit 81h described later, one contact s1 side is switched to the other contact s2, and during this period, the reference band synthesis circuit 81c supplies the baseband signal of the baseband signal mode. The helper signal passes through the other contact s2 and the movable contact s3 to the YC of the next stage.
It is output to the separation circuit image 82.

The horizontal sync separation circuit 81g outputs each horizontal sync signal separated from the video signal supplied thereto to the helper signal line detection circuit 81h. The helper signal line detection circuit 81h is a horizontal sync signal supplied from the horizontal sync separation circuit 81g, and a helper section (a part d2 without an image in which the helper signal shown in FIG. 11D is inserted).
A detection signal indicating that the period (d3 is present) is detected is output to the switch SW1.

The helper signal demodulating circuit 81b, burst signal extracting circuit 81d, APC circuit 81e, and oscillating circuit 81f are all color signal demodulating circuits (low-pass filter 63, ACC circuit 64,
Frequency conversion circuit 65, bandpass filter 66, burst signal attenuation circuit 67, crosstalk removal circuit 68),
The burst signal separation circuit 76, the APC circuit (the APC loop including the burst signal separation circuit 76, the phase comparison circuit 75, the VXO 74, and the sub frequency conversion circuit 73) and the crystal oscillator 77 have the same configuration and the same operation. The description is omitted.

As a result, the helper demodulation circuit 81 demodulates the transmitted AM-modulated modulated helper signal constituting the transmitted PALplus system video signal into a baseband signal mode and clamps it at a predetermined level as a helper signal of the next stage. It can be output to the YC separation circuit 82.

Now, the circuit configuration and operation of the helper re-modulation circuit 84 constituting the video signal transmission system 80 shown in FIG. 1 will be described with reference to FIG. The helper remodulation circuit 84 includes a helper signal modulation circuit (modulation) 84a, a low pass filter (LPF) 84b, and a reference level synthesis circuit 84.
c, a delay line (DL) 84d, a horizontal sync separation circuit (sync separation) 84e, a helper signal line detection circuit (helper line detection) 84f, and a switch SW2.

Next, the operation of the helper remodulation circuit 84 will be described. First, the reproduced luminance signal output from the luminance signal reproducing system (Y reproducing system) 83 a of the VTR signal processing system 83, that is, the luminance signal reproducing system 50 is a helper signal modulating circuit 84.
a, delay line 84d and horizontal sync separation circuit 84g
Are supplied to each. The output side of the delay line 84d is connected to one contact s4 of the switch SW2. The helper signal modulation circuit 84a outputs a color signal reproduction system (C reproduction system) 83b of the VTR signal processing system 83, that is, a color of 4.43 MHz output from an oscillator 71 which is a voltage controlled crystal oscillator constituting the color signal reproduction system 62. After the subcarrier frequency fsc is AM-remodulated with the helper signal (waveform shown in FIG. 5) in the baseband signal mode output from the luminance signal reproduction system 83a, the modulated helper signal obtained is subjected to gain adjustment, and then this is adjusted to the low frequency range. It outputs to the filter 84b. The low-pass filter 84b outputs a modulation helper signal obtained by removing unnecessary high-frequency components of the supplied modulation helper signal to the reference level synthesis circuit 84c. The reference level synthesis circuit 84c is synthesized with a predetermined level (pedestal level) and then output to the other contact s5 of the switch SW2 (waveform shown in FIG. 6). Switch S
The movable contact s6 of W2 is connected to an output terminal (not shown) at the next stage.

The movable contact s6 of the switch SW2 is always switched to the one contact s4 side, and the delay line 8
The reproduction luminance signal transmitted via 4d is output as it is (through) via the movable contact s6. Further, only when the detection signal is output from the helper signal line detection circuit 84f described later, the contact point is switched to the other contact s5 side, and at this time, the reference level synthesis circuit 84c switches to the predetermined level (0IR
The modulated helper signal combined with E) is output to the YC mixing circuit 85 via the switch SW2.

The horizontal sync separation circuit 84e outputs the horizontal sync signal separated from the reproduction luminance signal supplied thereto to the helper signal line detection circuit 84f. The helper signal line detection circuit 84f outputs to the switch SW2 a detection signal indicating that the above-mentioned helper section has been detected from the horizontal synchronization signal supplied from the horizontal synchronization separation circuit 84g. Also, a delay line 8 for delaying the reproduction luminance signal described above for a predetermined time
4d is an insertion connection to the reproduction color signal system (color signal reproduction system 83b
Output side of the YC mixing circuit 85 and one input side of the YC mixing circuit 85) and a delay line 83bb for delaying the reproduction color signal for a predetermined time, together with a reproduction luminance signal and a reproduction carrier color signal in the YC mixing circuit 85. When outputting the signal,
It is used to match the timing of the mixing.

As a result, the helper remodulation circuit 84 becomes V
The output timings of the reproduction luminance signal and the modulation helper signal forming the main signal output from the brightness signal reproducing system 83a of the TR signal processing system 83 are determined by the reproduction carrier color forming the main signal output from the color signal reproducing system 83b. The output timing of the reproduction luminance signal and the modulation helper signal can be adjusted (signal delay adjustment) so as to match the signal output timing.

Here, the YC mixing circuit 85 is connected to the next stage of the helper re-modulation circuit 84, and the reproduction luminance signal and the modulation helper signal output from the helper re-modulation circuit 84,
The reproduction carrier color signal output from the color signal reproduction system 83b is frequency-multiplexed and output as a composite video signal so that it can be directly supplied to the composite video input terminal of an external TV receiver or the like.
The reproduction luminance signal and the modulation helper signal output from the helper re-modulation circuit 84 and the reproduction carrier color signal output from the color signal reproduction system 83b do not necessarily have to be output as a composite video signal, and can be output by a so-called YC separation input / output method. Needless to say. If the external TV receiver or the like has a YC input terminal capable of inputting a video signal by the YC separation input method by outputting by the YC separation method in this way, the above-mentioned reproduction luminance signal and modulation helper signal Since the reproduced carrier color signal can be directly supplied to the Y input terminal to the C input terminal, respectively, a reproduced image having a higher image quality can be viewed on the TV receiver or the like than that supplied as the composite video signal.

By the way, the output side of the luminance signal reproducing system 83a of the VTR signal processing system 83 shown in FIG. 3 is set to point A, the output side of the helper remodulation circuit 84 is set to point B, and the output of the color signal reproducing system 83b is set. When the side A is the point and the output side of the delay line 83bb is the point B, the helper remodulation circuit 84 and the delay line 83bb described above are unnecessary when the video signal of the current broadcasting system is transmitted. Since the timing of the reproduction luminance signal output from the point A on the output side of the reproduction system 83a and the timing of the reproduction carrier color signal output from the point A on the output side of the color signal reproduction system 83b are synchronized, these two points A Signal may be directly supplied to the YC mixing circuit 85 (state of case 1 shown in FIG. 4). Similarly, when the PAL signal is supplied, the switch SW2 is set to s
The brightness signal reproduction system 83 is output to the point B via the delay line 84d and the switch SW2 by being connected to the fourth side.
Since the timing of the reproduction luminance signal output from a is synchronized with the timing of the reproduction carrier color signal output from the color signal reproduction system 83b output to the point B via the delay line 83bb, the state of Case 1 described above. Equal to this 2
A signal may be directly supplied from one point B to the YC mixing circuit 85 (state of case 4 shown in FIG. 4). Further, the reproduction luminance signal output from the point A on the output side of the luminance signal reproduction system 83a and the delay described above. When the reproduced carrier color signal output from the point B on the output side of the line 83bb is supplied to the YC mixing circuit 85 (the case 2 shown in FIG. 4),
Further, the helper remodulation circuit 84 outputs the reproduction luminance signal output from the output point B of the switch SW2 in the switching state shown in FIG. 3 and the reproduction carrier color signal output from the output point A of the color signal reproduction system 83b to YC. In the case of supplying to the mixing circuit 85 (state of case 3 shown in FIG. 4), in each of these cases, YC
The timing of the reproduction luminance signal and the reproduction carrier color signal in the mixing circuit 85 does not match well, so that the YC mixing circuit 8
5 cannot output a good composite video signal.
On the other hand, when the PALplus system video signal is transmitted (case 4 shown in FIG. 4), the reproduction luminance signal and the modulation helper signal output from the point B on the output side of the helper remodulation circuit 84. And the reproduction carrier color signal output from the point B on the output side of the delay line 83bb are supplied to the YC mixing circuit 85, the timings of both signals are synchronized, and this case is the best case. Can be said. Therefore, the YC mixing circuit 85 is supplied with the reproduction luminance signal and the modulation helper signal from the output side of the helper re-modulation circuit 84, and the reproduction carrier color signal output from the point B on the output side of the delay line 83bb. Is best.

Now, (2) a VTR 80A for recording a video signal of the PALplus broadcasting system transmitted by the YC input separation system and transmitting a video signal to be reproduced by the YC output separation system will be described with reference to FIGS. 7 and 8. explain. The same components as those described above are designated by the same reference numerals,
The description is omitted.

The recording system of the VTR 80A is, as shown in FIG. 7, a helper demodulation circuit 81, a YC separation circuit 82, delay lines (DL) 85 and 87, a VTR recording system (VTR recording system processing) 86, a switch SW3 (contact point). s7, s8 and movable contact s9), switch SW4 (contact s10,
s11 and movable contact s12), switch SW5
(It has contacts s13, s14 and movable contact s15) and switch SW6 (which has contacts s16, s17 and movable contact s18). The VTR recording system 86 is composed of the luminance signal recording system 20 and the color signal recording system 31 described above. The switches SW3, SW5 and SW6 are switched by a mode switching signal, and the switch SW4 is switched by an input switching signal. Here, the mode switching signal is P
The signal is a signal for identifying the AL broadcasting system or the PALplus broadcasting system. For example, it is an “H” level signal for the PAL broadcasting system and an “L” level signal for the PALplus broadcasting system. The input switching signal is a signal for identifying the mode of the supplied video signal (YC input / output separation system (S terminal) or composite connection system (composite terminal),
For example, it is an "H" level signal when the S terminal is input and an "L" level signal when the composite input is made.

Next, the operation of the recording system of the VTR 80A having the above structure will be described. (1) When recording a composite video signal of the PAL broadcasting system The mode switching signal is "H" level and the input switching signal is "L"
level. The movable contact s9 of the switch SW3 is on the contact s8 side,
The movable contact s12 of the switch SW4 is switched to the contact s10 side, the movable contact s15 of the switch SW5 is switched to the contact s14 side, and the movable contact s18 of the switch SW6 is switched to the contact s17 side. The composite video signal of the PAL broadcasting system to be recorded is supplied to the helper demodulation circuit 82 and the delay line 85 via the contact s8 and the movable contact s9 of the switch SW3, respectively. The composite video signal supplied to the delay line 85 is delayed for a required time here, and then the contact s of the switch SW4
10. The luminance signal and the carrier color signal, which are supplied to the YC separation circuit 82 via the movable contact s9 and obtained by YC separating the composite video signal, are output. This brightness signal is a switch SW
5 is supplied to the luminance signal recording system 20 constituting the VTR recording system 86 via the contact point s14 and the movable contact point s15, and the carrier color signal is transmitted via the contact point s17 and the movable contact point s18 of the switch SW6 to the VTR recording system. The color signal is supplied to the color signal recording system 31 constituting 86, subjected to necessary recording signal processing to be a frequency multiplexed signal, and then recorded on a magnetic tape (not shown). In this way, the VTR 80A can record the composite video signal of the PAL broadcasting system.

(2) When recording YC separated input video signal of PAL broadcasting system: Mode switching signal is "H" level, input switching signal is "H"
level. The movable contact s9 of the switch SW3 is on the contact s7 side,
The movable contact s12 of the switch SW4 is switched to the contact s10 side, the movable contact s15 of the switch SW5 is switched to the contact s13 side, and the movable contact s18 of the switch SW6 is switched to the contact s16 side. The luminance signal forming the video signal of the PAL broadcasting system to be recorded is the contact s7 and the movable contact s9 of the switch SW3.
Via the helper demodulation circuit 82 and the delay line 85
Are supplied to each. The luminance signal supplied to the delay line 85 is delayed for a required time here, and then the switch SW
4 through the contact s10, the movable contact s12, the switch SW5 contact s13, and the movable contact s15.
Is supplied to the luminance signal recording system 20 which constitutes Further, the carrier color signal forming the video signal of the PAL broadcasting system to be recorded is delayed by the delay line 87, and then the switch S
It is supplied to the color signal recording system 31 constituting the VTR recording system 86 via the contact s16 of W6 and the movable contact s18. Thus, the luminance signal and the carrier color signal supplied to the luminance signal recording system 20 and the color signal recording system 31 are frequency-multiplexed signals subjected to the required recording signal processing, and then recorded on a magnetic tape (not shown). . Thus, PAL on the VTR80A
It is possible to record a YC separated input video signal of a broadcasting system.

(3) When recording a composite video signal of PALplus system: The mode switching signal is at "L" level and the input switching signal is at "L".
level. The movable contact s9 of the switch SW3 is on the contact s8 side,
The movable contact s12 of the switch SW4 is switched to the contact s11 side, the movable contact s15 of the switch SW5 is switched to the contact s14 side, and the movable contact s18 of the switch SW6 is switched to the contact s17 side. The composite video signal of the PALplus broadcasting system to be recorded is supplied to the helper demodulation circuit 82 and the delay line 85 via the contact s8 and the movable contact s9 of the switch SW3, respectively. The composite video signal supplied to the helper demodulation circuit 82 is made into a composite video signal including a demodulation helper signal obtained by demodulating only the modulated helper signal in the signal here, and then the contact s1 of the switch SW4
1, and is supplied to the YC separation circuit 82 via the movable contact s12. The YC separation circuit 82 outputs a luminance signal and a demodulation helper signal which form the main signal obtained by YC separating the composite video signal here, and a carrier color signal which forms the main signal. Among them, the luminance signal and the demodulation helper signal are transmitted through the contact s14 and the movable contact s15 of the switch SW5 to the VTR recording system 8
6 is supplied to the luminance signal recording system 20 and the carrier color signal is supplied to the color signal recording system 31 forming the VTR recording system 86 via the contact s17 and the movable contact s18 of the switch SW6. After being subjected to the recording signal processing described above to obtain a frequency-multiplexed signal, it is recorded on a magnetic tape (not shown). In this way, it is possible to record the composite video signal of the PALplus broadcasting system on the VTR 80A.

(4) When recording a PALplus type YC separated input video signal: The mode switching signal is at the "L" level and the input switching signal is at the "H" level.
level. The movable contact s9 of the switch SW3 is on the contact s7 side,
The movable contact s12 of the switch SW4 is switched to the contact s11 side, the movable contact s15 of the switch SW5 is switched to the contact s13 side, and the movable contact s18 of the switch SW6 is switched to the contact s16 side (switching state shown in FIG. 7). PALp to record
The luminance signal of the main signal and the modulation helper signal that form the lus broadcasting system are the contact s7 and the movable contact s9 of the switch SW3.
Via the helper demodulation circuit 82 and the delay line 85
Are supplied to each. The modulated helper signal supplied to the helper signal demodulation circuit 82 is converted into a demodulation helper signal obtained by demodulating in a band mode here. Contact s13, movable contact s15
Is supplied to the luminance signal recording system 20 which constitutes the VTR recording system 86 via. Further, the carrier color signal is delayed by the delay line 87, and then the contact s1 of the switch SW6.
6, and is supplied to the color signal recording system 31 which constitutes the VTR recording system 86 via the movable contact s18. In this way, the luminance signal, the demodulation helper signal and the carrier color signal supplied to the luminance signal recording system 20 and the color signal recording system 31 are frequency-multiplexed signals subjected to the required recording signal processing, and then the magnetic tape (not shown). Recorded in. In this way, P on the VTR80A
It is possible to record a YC separated input video signal of the ALplus broadcasting system.

On the other hand, the reproducing system of the VTR 80A, as shown in FIG. 8, is a VTR reproducing system (VTR reproducing system processing) 88, a helper remodulation circuit 84, a delay line (DL) 89,
90A, YC mixing circuit 85, switch SW7 (contact s1
9, s20, and movable contact s21). This VTR reproduction system 88 is the above-mentioned luminance signal reproduction system 5
0 and color signal reproduction system 62. The switch SW7 is switched by the above-mentioned mode switching signal. As described above, the mode switching signal is, for example, “H” level in the PAL broadcasting system and “L” in the PALplus broadcasting system.
It is a level signal.

Next, the operation of the reproducing system of the VTR 80A having the above structure will be described. (1) When a video signal recorded by the PAL broadcasting system is reproduced as a composite video signal or a YC separated output video signal, the mode switching signal is at "H" level, and the movable contact s21 of the switch SW7 is switched to the contact s19 side. A reproduction signal reproduced from a magnetic tape (not shown) is a VTR reproduction system 88.
Of the reproduction luminance signal and the reproduction carrier color signal which have been subjected to the reproduction processing and have been subjected to the necessary frequency separation, the reproduction luminance signal is passed through the helper remodulation circuit 84 and the delay line 90A to the contact s19 of the switch SW7. Each is supplied. The reproduction luminance signal supplied to the contact s19 of the switch SW7 is passed through the movable contact s21 of the switch SW7,
As one of the YC separated outputs, it is reproduced and output as a YC separated output video signal in combination with the reproduction carrier color signal output from the VTR reproducing system 88 delayed by the required time through the delay line 89, and at the same time, the YC mixing circuit 85. Are frequency-multiplexed and reproduced and output as a composite video signal. In this way, the video signal recorded by the PAL broadcasting system on the VTR 80A can be reproduced as the composite video signal or the YC separated output video signal.

(2) When the video signal recorded by the PALplus broadcasting system is reproduced as the composite video signal or the YC separated output video signal, the mode switching signal is at the "L" level, and the movable contact s21 of the switch SW7 is switched to the contact s20 side. (Switching state shown in FIG. 8). A reproduction signal reproduced from a magnetic tape (not shown) is supplied to a VTR reproduction system 88, in which reproduction luminance among a reproduction luminance signal, a demodulation helper signal, and a reproduction color signal, which have been subjected to the necessary frequency separation and subjected to the reproduction signal processing, are reproduced. The signal and the demodulation helper signal are supplied to the helper remodulation circuit 84, the delay line 90A and the contact s19 of the switch SW7, respectively. The reproduction luminance signal and the demodulation helper signal supplied to the helper remodulation circuit 84 are output as a modulation helper signal obtained by remodulating only the demodulation helper signal here, and then output via the contact s20 and the movable contact s21 of the switch SW7. , YC separation output as one of the delay line 8
A composite signal obtained by forming a combination with a reproduction carrier color signal output from the VTR reproduction system 88 delayed by a required time via 9 and reproducing and outputting as a YC separated output video signal, and frequency-multiplexing in a YC mixing circuit 85. It is reproduced and output as a video signal. In this way, the video signal recorded by the PALplus broadcasting system on the VTR 80A can be reproduced as the composite video signal or the YC separated output video signal.

Now, (3) the TV receiver 90 for receiving the video signal of the PALplus broadcasting system transmitted by the YC input separation system will be described with reference to FIG. The same components as those described above are designated by the same reference numerals,
The description is omitted.

TV receiver 90 compatible with PALplus
Is a reproduction signal (Y
The video signal (encoded video signal k) of the PALplus broadcasting system as the video signal supplied by the C separation input / output system and the composite video system is shown in FIG. By decoding the video signals respectively supplied from the helper demodulation circuit 90b and the color demodulation circuit 90c in accordance with the decoding basic algorithm B, an image reception signal (decoded video signal h) is generated, which is 16: 9 of the CRT 90e. The image can be received on a screen with an aspect ratio. TV receiver 9
As shown in FIG. 9, 0 is a YC separation circuit 90a, a helper demodulation circuit 90b, and a color demodulation circuit (color decoder) 90.
c, image receiving processing circuit (signal processing) 90d, CRT 90e,
Oscillator 90f, switch SW8 (contacts s22, s23,
Movable contact s24), switch SW9 (contact s2
5, s26, and movable contact s27) (not shown here, helper demodulation circuit 90b)
There is also a delay line connected in parallel between the input and output). The YC separation circuit 90a is the YC separation circuit 82 described above.
It has the same structure as. The helper demodulation circuit 90b has the same configuration as the helper demodulation circuit 81 described above.
The color demodulation circuit 90c uses the carrier color signal supplied from the switch SW9 to output the reference subcarrier fsc from the oscillator 90f.
To output color signals U and V obtained by two-axis demodulation. The image receiving processing circuit 90d performs decoding according to the decoding basic algorithm B on the basis of the luminance signal and the demodulation helper signal output from the helper demodulation circuit 90b, and the color signals U and V output from the color demodulation circuit 90c to obtain the decoded video signal h. From the color signals U and V, the luminance signal, and the demodulation helper signal that form the decoded video signal h in a matrix circuit (not shown).
-Y) is generated, a primary color output circuit (not shown) generates primary color signals (R, G, B) based on these color difference signals (RY, GY, BY) and outputs to the CRT 90e. . CR
The T90e receives an image corresponding to the primary color signals (R, G, B) with an aspect ratio of 16: 9. Here, the input switching signal is a mode of the supplied video signal (YC separation type input (S terminal input) or composite input (composite input))
Is a signal indicating “H” level when the S terminal is input, and is an “L” level signal when the composite is input.

Next, the TV receiver 90 having the above structure
The image receiving operation will be described. (1) When receiving a composite video signal of the PAL broadcasting system The input switching signal is "L" level. The movable contact s24 of the switch SW8 is on the contact s23 side, and the movable contact s of the switch SW9 is
27 is switched to the contact s26 side, respectively. The composite video signal of the PAL broadcasting system to be received is YC separated by the YC separation circuit 90a, and the luminance signal thereof is the contact s23 of the switch SW8, its movable contact s24, the helper demodulation circuit 8
1 to the image receiving processing circuit 90d. On this occasion,
Although not shown, the luminance signal of the PAL broadcasting system is delayed for a predetermined time via the above-mentioned delay line without passing through the helper demodulation circuit 90b, and then the image receiving processing circuit 9
0d is supplied. Further, the carrier color signal is the switch S.
It is supplied to the color demodulation circuit 90c via the contact s26 of W9 and the movable contact s27. Then, based on this, the image receiving processing circuit 90d performs the above-described image receiving processing. In this way, the TV receiver 90 can receive the image of the PAL broadcasting system with the aspect ratio of 4: 3 in the screen with the aspect ratio of 16: 9.

(2) When receiving the YC separated input video signal of the PAL broadcasting system The input switching signal is at "H" level. The movable contact s24 of the switch SW8 is on the contact s22 side, and the movable contact s of the switch SW9 is
27 are switched to the contact s25 side (switching state shown in FIG. 9). One luminance signal of the YC separated input video signal of the PAL broadcasting system to be received is the contact s of the switch SW8.
It is supplied to the image receiving processing circuit 90d via the movable contact 22, the movable contact s24, and the helper demodulating circuit 81. At this time, although not shown, the luminance signal of the PAL broadcasting system is supplied to the image reception processing circuit 90d after being delayed for a predetermined time through the above-mentioned delay line without passing through the helper demodulation circuit 90b. The other carrier color signal is the switch SW9.
The color demodulation circuit 90 through the contact s25 and the movable contact s27
is supplied to c. Then, based on this, the image receiving processing circuit 9
0d performs the image receiving process described above. In this way, the TV receiver 90 can receive the image of the PAL broadcasting system with the aspect ratio of 4: 3 in the screen with the aspect ratio of 16: 9.

(3) When receiving a composite video signal of the PALplus broadcasting system The input switching signal is at "L" level. The movable contact s24 of the switch SW8 is on the contact s23 side, and the movable contact s of the switch SW9 is
27 is switched to the contact s26 side, respectively. The composite video signal of the PALplus broadcasting system to be received is YC separated by the YC separation circuit 90a, and then the luminance signal and the modulated helper signal are supplied to the helper demodulation circuit 81 via the contact s23 of the switch SW8 and its movable contact s24. Then, the demodulation helper signal obtained by demodulation here is supplied to the image receiving processing circuit 90d together with the luminance signal. Further, the carrier color signal is supplied to the color demodulation circuit 90c via the contact s26 and the movable contact s27 of the switch SW9. Then, based on this, the image receiving processing circuit 90d performs the above-described image receiving processing. In this way, the TV receiver 90 can receive the wide image of the PALplus broadcasting system having the aspect ratio of 16: 9 on the screen having the aspect ratio of 16: 9.

(2) When receiving the YC separated input video signal of the PALplus broadcasting system The input switching signal is at the "H" level. The movable contact s24 of the switch SW8 is on the contact s22 side, and the movable contact s of the switch SW9 is
27 are switched to the contact s25 side (switching state shown in FIG. 9). Y of PALplus broadcasting system to be received
The luminance signal of the C separated input video signal and the modulation helper signal are supplied to the helper demodulation circuit 81 via the contact s22 of the switch SW8 and the movable contact s24 thereof, where the modulation helper signal is the luminance as a demodulation helper signal obtained by demodulation. The signal is supplied to the image receiving processing circuit 90d. Further, the carrier color signal is the contact s26 of the switch SW9, the movable contact s.
It is supplied to the color demodulation circuit 90c via 27. Then, based on this, the image receiving processing circuit 90d performs the above-described image receiving processing. Thus, the TV receiver 90 displays the PALplus having the aspect ratio of 16: 9 on the screen having the aspect ratio of 16: 9.
It is possible to receive images of the broadcasting system.

Although the above description has explained the PALplus system, the present invention is not limited to this.
It goes without saying that the same can be done with the EDTV2.

As described above, the video signal transmission system according to the present invention transmits a series of high-definition video signals having an aspect ratio different from that of a predetermined broadcasting system and is compatible with the predetermined broadcasting system. An image having a modulated auxiliary signal obtained by modulating the auxiliary signal in a required manner among auxiliary signals in the form of baseband signals, which includes at least a main signal and video additional information constituting the high-quality video signal. A video signal transmission system for transmitting a signal using the signal transmission system of the predetermined broadcasting system, wherein the modulation auxiliary signal is provided when the video signal input in a composite or YC separation mode is output in a composite or YC separation mode. Is output together with the luminance signal of the video signal in the YC separation mode, the modulation auxiliary signal is the same as the luminance signal forming the video signal. Since it is possible to process the signal of the above, it is possible to prevent the deterioration of the modulation auxiliary signal during transmission, and thus even if the video signal is transmitted, the definition of the main signal in the reproduced video signal can be increased by the auxiliary. There is an effect that it can always be reinforced well by the signal, for example,
A video signal of the PALplus broadcasting system can be transmitted using the YC separation input / output system. Further, the video signal recording / reproducing apparatus according to the present invention transmits a series of high-definition video signals having an aspect ratio different from the aspect ratio of the predetermined broadcasting system, has compatibility with the predetermined broadcasting system, and has the high quality. Among the auxiliary signals of the baseband signal mode, which include at least the main signal and the video additional information forming the video signal, the video signal provided with the modulated auxiliary signal obtained by modulating the auxiliary signal in a required mode is used as the predetermined broadcasting system. A video signal recording / reproducing apparatus for recording / reproducing the auxiliary signal obtained by demodulating the modulated auxiliary signal into a baseband signal mode, using a luminance signal recording system for recording a luminance signal related to the video signal. The recording means for recording and the reproducing means for outputting the auxiliary signal reproduced from the luminance signal reproducing system as the modulated auxiliary signal obtained by remodulating the auxiliary signal in the required manner, When inputting / outputting a signal in a composite or YC separation mode, the modulation auxiliary signal is configured to be input / output together with the luminance signal of the video signal in the YC separation mode. Therefore, the modulation auxiliary signal is a luminance signal forming the video signal. Since it is possible to process the same signal as the above, it is possible to prevent deterioration of the modulation auxiliary signal during recording and reproduction, and even if the video signal is recorded and reproduced, the fineness of the main signal in the reproduced video signal can be reduced. Has the effect of always being able to favorably enhance the degree by the auxiliary signal. For example, the video signal of the PALplus broadcasting system transmitted by the YC input separation system is recorded, and the video signal to be reproduced is transmitted by the YC output separation system. A VTR can be provided. Further, a TV receiver according to the present invention is a TV receiver for receiving an image corresponding to the video signal supplied from the above video signal recording / reproducing device in a composite or YC separation mode.
Since the demodulation means for outputting the auxiliary signal obtained by demodulating the modulated auxiliary signal supplied together with the luminance signal of the video signal supplied in the composite or YC separation mode into the baseband signal mode, the above-mentioned video signal recording is provided. Since it is possible to receive the video signal reproduced from the reproducing device and in which the modulated auxiliary signal is not deteriorated, the definition of the main screen in the image to be received can be always satisfactorily reinforced by the auxiliary signal. Thus, it is possible to provide a TV receiver that receives a video signal of the PALplus broadcasting system transmitted by the YC input separation system, for example.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a video signal transmission system according to the present invention.

FIG. 2 is a block diagram of an embodiment of a helper demodulation circuit that constitutes a video signal transmission system.

FIG. 3 is a diagram for explaining a block configuration of a first embodiment of a helper remodulation circuit which constitutes a video signal transmission system.

FIG. 4 is a diagram for explaining the operation of the helper remodulation circuit.

FIG. 5 is a waveform diagram of a demodulation helper signal.

FIG. 6 is a waveform diagram of a remodulation helper signal.

FIG. 7 is a block diagram of an embodiment of a recording system of the video signal recording / reproducing apparatus according to the present invention.

FIG. 8 is a block diagram of an embodiment of a reproducing system of the video signal recording / reproducing apparatus according to the present invention.

FIG. 9 is a block diagram of an embodiment of a TV receiver according to the present invention.

FIG. 10 is a frequency spectrum of a demodulation helper signal.

FIG. 11 is a diagram for explaining a reproduced image of PALplus.

FIG. 12 is a diagram illustrating a PALplus encoding basic algorithm.

FIG. 13 is a diagram for explaining a PALplus decoding basic algorithm.

FIG. 14 is a diagram for explaining the operation of a PALplus decoding basic algorithm.

FIG. 15 is a diagram for explaining a recording system of a current VTR.

FIG. 16 is a diagram for explaining a reproduction system of a current VTR.

FIG. 17 is a frequency spectrum of an encoder video signal.

FIG. 18 is a diagram for explaining a direct recording / reproducing operation of a broadcast VTR.

FIG. 19 is a diagram for explaining a recording / reproducing operation by a YC separation system of a home VTR.

[Fig. 20] Fig. 20 is a diagram for explaining the operation of a YC separation system compatible TV receiver connected to a home VTR.

[Explanation of symbols]

 20 luminance signal recording system 31 color signal recording system 50 luminance signal reproducing system 62 color signal reproducing system 80 video signal recording / reproducing system 80A VTR (video signal recording / reproducing device) 81, 90b helper demodulating circuit (demodulating means) 82 luminance / color signal Separation circuit 83 VTR signal processing system 84 Helper remodulation circuit 86 VTR recording system 88 VTR reproduction system 90 TV receiver

Claims (3)

[Claims] 1. At least a main signal which transmits a series of high-definition video signals having an aspect ratio different from that of a predetermined broadcasting system and which is compatible with the predetermined broadcasting system and which constitutes the high-definition video signal. And transmitting a video signal having a modulated auxiliary signal obtained by modulating the auxiliary signal in a required manner among the auxiliary signals of the baseband signal manner including video additional information using the signal transmission system of the predetermined broadcasting system. A video signal transmission system for outputting, in outputting the video signal input in a composite or YC separation mode in a composite or YC separation mode, outputting the modulation auxiliary signal together with a luminance signal of the video signal in the YC separation mode. Video signal transmission system characterized by. 2. At least a main signal which transmits a series of high-definition video signals having an aspect ratio different from the aspect ratio of the predetermined broadcasting system, is compatible with the predetermined broadcasting system, and constitutes the high-definition video signal. And a video signal recording and reproducing, by a predetermined broadcasting system, a video signal having a modulated auxiliary signal obtained by modulating the auxiliary signal in a required manner among the auxiliary signals of the baseband signal manner including the video additional information. A reproducing device, which is a recording means for recording an auxiliary signal obtained by demodulating the modulated auxiliary signal into a baseband signal mode by using a brightness signal recording system for recording a brightness signal related to the video signal, and a brightness signal. A reproducing means for outputting the auxiliary signal reproduced from the reproducing system as the modulated auxiliary signal obtained by re-modulating the auxiliary signal in the required manner, and a composite or YC separation state of the video signal. In upon input and output, a video signal recording and reproducing apparatus, characterized in that the input and output together with the luminance signal of the video signal said modulated auxiliary signal in YC separation aspect. 3. A TV receiver for receiving an image corresponding to the video signal supplied from the video signal recording / reproducing apparatus according to claim 2 in a composite or YC separation mode, wherein the TV receiver is supplied in a composite or YC separation mode. And a demodulation means for outputting an auxiliary signal obtained by demodulating the modulated auxiliary signal supplied together with the luminance signal of the video signal into a baseband signal mode.