JPH0568267A - Transmitting and reproducing device for television signal - Google Patents

Abstract

PURPOSE:To reduce the interference of cross color and cross luminance in a side panel system by providing a frequency separating means, a time axis compressing means and a multiple means. CONSTITUTION:This device is provided with the frequency separating means 152 which reduces the luminance signal and the chrominance signal of a side image to frequency-divide into a high frequency range and the compression means 153 which time-axis-compress the low frequency range signal of the luminance signal and the chrominance signal of the side image separated by the frequency separating means 152. The device is also provided with the first multiple means which frequency-multiplies the low frequency range signal of the time-axis-compressed side image to the horizontal over scan part or the horizontal blanking part of the video signal of a center image and a second multiple means which multiplies the high frequency range signal of the luminance signal and the chrominance signal of the side image separated by the frequency separating means 152 to the three dimensional hall of the video signal of the center image. Thus, the interference of cross color and cross luminance, etc., in the case of reproduction with a conventional television receiver with an NTSC system can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television signal transmission / reproduction device, and more particularly to a second generation EDTV (Extended Def) compatible with the current television system.
The present invention relates to a side panel type television signal transmission / reproduction device in an initiation TV).

[0002]

2. Description of the Related Art As a method for transmitting a video signal having an aspect ratio larger than 4: 3 while maintaining compatibility with the NTSC method, the upper and lower sides of an NTSC image are made black, and a high frequency range is vertical and horizontal to the black area. A letter panel method that superimposes signals and transmits them, or a side panel that decomposes the signals of the center and side parts of a wide image and multiplexes the signals of both side parts into vertical and horizontal blanking periods and orthogonal components of the video carrier. There are methods, etc., and an intermediate method between these two methods has been proposed.

[0003]

As described above, NTSC
In the letter box method, in which the upper and lower parts of the image are blackened and various signals such as high frequency signals are multiplexed and transmitted in that area, the current N
When played back on a TSC receiver, black appears at the top and bottom of the screen and is unsightly.

On the other hand, the center image and the side image of the wide image are decomposed, the low range of the Y signal of the side image is multiplexed in the horizontal overscan section, and the high range of the Y signal of the side section and the IQ signal are divided. In the side panel system in which the signal is multiplexed and transmitted to the three-dimensional hole of the center panel, DC to 1.5 MHz for the I signal and Q for the three-dimensional hole of the center panel.
Since signals including DC-0.5 MHz low frequencies are multiplexed, the interference of cross color and cross luminance given to the current NTSC receiver by the low frequencies of those I and Q signals with particularly large energy is caused. There was a big problem.

[0005]

In order to solve the above problems, the present invention provides a side panel type television signal transmission device for transmitting a wide aspect television image by dividing it into a center image and side images. A frequency separation unit that frequency-separates the luminance signal (Y) and the color signal (I, Q) of the side image into a low band and a high band, and the luminance signal (Y) and the color signal (Y) of the side image that are separated by the frequency separation unit. (I, Q) low-frequency signal compression means for time-axis compression, and the time-axis-compressed side-image low-frequency signals (Y, I, Q) horizontal overscan portion or horizontal blanking portion of the center image video signal. The high-frequency signals of the side image luminance signal (Y) and chrominance signals (I, Q) separated by the first multiplexing means for frequency-multiplexing with the frequency separation means are the three-dimensional video signals of the center image. A configuration provided with a second multiplexing means for multiplexing Le.

Further, in the television signal reproducing apparatus for reproducing the television signal obtained from the above-mentioned television signal transmitting apparatus, the luminance signal of the side image (in the horizontal overscan portion or the horizontal blanking portion of the center image) Y) and first demodulation means for demodulating low-frequency signals of color signals (I, Q), and luminance signals (Y) and color signals (I, Q) of side images multiplexed in the three-dimensional hole of the center image. Second demodulating means for demodulating the high-frequency signal of the center image, and the luminance signal (Y) and the color signals (I, Q) of the side image demodulated by the first and second demodulating means to the luminance signal (Y) of the center image. ) And a color signal (I, Q) to reproduce a wide aspect video signal, and a projection means for projecting a wide aspect image from the video signal obtained from the addition means. To only configuration.

[0007]

According to the above construction, when the video signal of the center image is multiplexed in the three-dimensional hole, the side which becomes a large interference when reproduced by the current NTSC television receiver because of its large power on the frequency spectrum. The low-frequency signals of the image luminance signal (Y) and chrominance signals (I, Q) are multiplexed in the horizontal overscan section or the horizontal blanking section of the center image video signal, and the three-dimensional hole of the center image video signal is multiplexed. Is only the high frequency signals of the luminance signal (Y) and the color signals (I, Q) of the side image of which the power is small on the frequency spectrum of the video signal, the current NT
Cross-color and cross-luminance interference when reproduced on an SC television receiver is greatly improved and high quality images can be obtained, and if a dedicated wide aspect receiver is used, the aspect ratio is 16: 9 wide aspect ratio. The image of can be displayed.

[0008]

The present invention will be described in detail with reference to the embodiments shown in the drawings. First, the television signal transmission device of the present invention will be described. FIG. 1 is a block diagram showing a configuration of a main part of an embodiment of the present invention. In FIG. 1, 100 is a wide camera having 525 scanning lines, an aspect ratio of 16: 9 and an interlace ratio of 2: 1, and 150 has an aspect ratio of 16: 9.
A signal separation circuit for separating the wide aspect video signal 9 into a center image signal and a side image signal, 151 is a time axis expansion circuit for expanding the time axis of the center image signal, 15
Reference numeral 2 denotes a frequency separation circuit that separates a side image signal into a low frequency signal and a high frequency signal, and 153 is a time axis compression circuit that compresses the time axis of the side image low frequency signal.

Reference numeral 154 is a time axis expansion circuit for expanding the time axis of the high-frequency signal of the side image, and 155 is the frequency of the low-frequency signal of the side image to the horizontal overscan portion and the horizontal blanking portion of the video signal of the center image. A frequency multiplexing circuit for multiplexing, 122 is a frequency multiplexing circuit for frequency-multiplexing a high-frequency signal of a side image into a three-dimensional hole of a video signal of a center image, and 137 is an output terminal.

The configuration of the main part of the television signal transmission apparatus of the present invention is as described above, and it will be shown in more detail in FIG. 2, the same parts as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. In FIG. 2, 101 and 10
Reference numerals 2 and 103 are A / D converters that convert RGB signals from the wide camera 100 into digital signals, 104 is a matrix conversion circuit that converts RGB signals into luminance signals (Y) and color signals (I, Q), and 105 is A horizontal low-pass filter (hereinafter, referred to as “H-LPF”) of the I signal of the center image having a band of 0 (DC) to 1.5 MHz, 106 is 0 to 0.
H- of the low side I signal of the side image having a band of 3 MHz
LPF.

Reference numeral 107 is an H-LPF of the Q signal of the center image having a band of 0 to 0.6 MHz, and 108 is 0 to 0.1.
H- of low side Q signal of side image having 2 MHz band
LPF, 109 is H-LPF of Y signal of center image having band of 0 to 5.0 MHz, 110 is 0 to 0.84M
H-LP of low side Y signal of side image having band of Hz
F and 125 are horizontal bandpass filters (hereinafter,
"H-BPF"), 126 is 0.12-0.6M
H-BP of high side Q signal of side image having Hz band
F and 127 are H-BPFs of Y signals in the high frequency band of the side image having a band of 0.84 to 5.0 MHz.

Further, 111, 113 and 115 are time axis expansion circuits for expanding the I, Q and Y signals of the center image by 1.2674 times, and 112, 114 and 116 are I, Q in the low range of the side image. , 129 and 130 are time axis expansion circuits for expanding the high frequency I, Q and Y signals of the side image by 3 times.

Reference numerals 117, 118 and 119 denote splicers for joining the center image signal and the low side image signal in the I, Q and Y signals, and 131 denotes the high frequency signal of the side image I signal in the "time-vertical direction". The modulators 132 and 133 are for modulating the Q and Y signals of the side image in the first and third quadrants on the two-dimensional frequency spectrum and modulating with the carrier (so-called blow carrier) which has a conjugate relationship with the color subcarrier. It is a modulator that modulates a high frequency signal with a carrier having a phase difference of 90 degrees from that of the blown carrier.

120 is the splicers 117 and 11
A modulator that quadrature modulates the output of 8 with a 3.58 MHz color subcarrier, 121 is an adder that frequency multiplexes the Y signal from the splicer 119 with the output of the modulator 120, 1
Numeral 35 is an adder for adding the modulated signals of the Q and Y signals of the high frequency of the side image to the modulated signal of the high frequency I signal of the side image obtained through the inverse Nyquist filter 134, and 122 is the television obtained from the adder 121. 12 is an adder that multiplexes the output of the adder 135 with a John signal, 123 is an adder that adds a synchronization signal to the video signal of the adder 122, 12
Reference numeral 4 is a D / A converter for converting the television signal to which the synchronizing signal is added by the adder 123 into an analog signal.

The embodiment of the television signal transmitting apparatus of the present invention has the above-mentioned configuration, and its operation will be described below.
1 and 2, the wide camera 10 having 525 scanning lines / aspect ratio of 16: 9 / interlace ratio of 2: 1
The RGB signal output from 0 is the A / D converter 101,
After being converted into digital signals by 102 and 103, they are converted into a luminance signal Y and color signals IQ by a matrix converter 104. Of these, the center panel of the Y signal is H-
After the band is limited to DC to 5.0 MHz by the LPF 109, the original image (a) is displayed as shown in (b) and (c) of FIG.
The center image (b) is expanded by 1.2674 times by the time-axis expansion circuit 115 to obtain a signal as shown in (c) of FIG.

Further, the low range of the side image of the Y signal is HL.
After the band is limited to DC to 0.84 MHz by the PF110, the original image (a) is displayed as shown in (d) and (e) of FIG.
The side image (d) of (1) is time-axis compressed five times by the time-axis compression circuit 116, and becomes a signal as shown in (e) of FIG. This compressed signal (e) is arranged in the horizontal overscan portion of the video signal, spliced with the center image (c) of the Y signal after expansion in the splicer 119, and the signal as shown in FIG. Becomes

Next, the I and Q signals of the center image are respectively sent by the H-LPFs 105 and 107, and the I signal is DC.
.About.1.5 MHz, the Q signal is band-limited to DC to 0.6 MHz, and then, like the center image of the Y signal, as shown in FIGS. 3B and 3C, the center portion of the original image (a). (B) is 1.26 by the time axis expansion circuits 111 and 113.
The signal is expanded by 74 times and becomes a signal as shown in FIG.

Further, the low frequencies of the side images of the I and Q signals are respectively H-LPFs 106 and 108, and the I signal is DC to DC.
After the band of 0.3 MHz and the Q signal are band-limited to DC to 0.12 MHz, as in the low range of the side image of the Y signal, as shown in (d) to (e) of FIG. The side portion (d) is compressed five times by the time axis compression circuits 112 and 114, and becomes a signal as shown in (e) of FIG.

The low-frequency signal (e) of the side image of the IQ signal after compression is arranged in the horizontal overscan portion of the video signal, and is spliced by the splicers 117 and 118, respectively.
After being spliced with the center image of the expanded IQ signal as shown in FIG.
Quadrature modulation is performed on the 58 MHz color subcarrier. The IQ modulation signal from the modulator 120 is frequency-multiplexed with the Y signal from the splicer 119 in the adder 121.

Next, the high frequency signals of the IQY signal of the side image are 0.3 MHz to 1.5 MHz for the I signal, 0.12 MHz to 0.6 MHz for the Q signal, and Y for the high frequency signals of the H-BPFs 125, 126 and 127, respectively. Signal is 0.84MH
After the band is limited to z to 5.0 MHz, the time axis expansion circuits 128, 129, and 130 horizontally expand the time axis three times, and the signal (d) in FIG. 3 becomes the signal (f).

Next, in the modulators 132 and 133, "time-
A "vertical" carrier in the first and third quadrants on the two-dimensional frequency spectrum, which has a conjugate relationship with the color subcarrier, that is, a so-called blow carrier, modulates the high-frequency signals of the Q and Y signals of the side image, and further the modulator. At 131, the high-frequency signal of the I signal of the side image is modulated by a carrier whose phase is different from that of the carrier by 90 degrees.
The modulation signal of the I signal of the side image is band-limited by the inverse Nyquist filter 134, and then added by the adder 135 with the modulation signal of the side image QY signal.

The addition signal from the adder 135 is multiplexed in the adder 122 with the signal of the center image, that is, the signal obtained by multiplexing the low-frequency signal of the YIQ signal of the side image in the horizontal overscan portion, and the adder 123. A sync signal is added, converted into an analog signal by the D / A converter 124, and output from the output terminal 137.

Next, the television signal reproducing apparatus of the present invention for reproducing the television signal from the television signal transmitting apparatus will be described in detail with reference to an embodiment shown in FIGS. 4 to 5.

FIG. 4 is a block diagram showing the configuration of the essential parts of one embodiment of the present invention. In FIG. 4, 201 is an input terminal T
A horizontal band split filter for extracting a low frequency signal Y _SL of the luminance signal of the side image receiving television signals from a television signal transmission apparatus shown in FIG. 2 to be more directed (hereinafter, referred to as H-BSF), 202 Is above H
An inter-field difference circuit (hereinafter referred to as IFAD) in the frame that separates the side panel signal multiplexed in the three-dimensional hole of the center image from the output of the BSF 201.

Reference numeral 203 denotes a Y / C separation circuit for separating the luminance signal Y and chroma signal C from the video signal derived from the IFAD 202, and 204 a demodulation circuit for demodulating the color signals I and Q from the chroma signal C. 250 is the above IFAD
A side image high-frequency signal processing circuit 251 that performs processing such as demodulation and compression on the color signals and luminance signals of the side panel portion supplied from 202 to derive high-frequency signals Ish, Qsh, and Ysh of the side image, and 251 is the above The luminance signal Y from the Y / C separation circuit 203, the low-frequency signal Y _SL of the luminance signal of the side image from the H-BSF 201, and the luminance signal of the side image obtained from the high-frequency signal processing circuit 250 of the side image. The luminance signal demodulation processing circuit reproduces the luminance signal Y from the high frequency signal Ysh.

Reference numerals 215 and 216 denote the demodulation circuit 204.
Side image low-pass signals I _SL and Q of the color signal obtained from
_{In SL} , high side signals Ish and Qsh of the side image of the color signal obtained from the side image high frequency signal processing circuit 250 are provided.
Are added to obtain the color signals Is and Qs of the side image, and the adders 218 and 219 add the color signals Ic and Qc of the center image obtained from the demodulation circuit 204 to the adder 2
15 is a splicer which obtains color signals I and Q by splicing side image color signals Is and Qs obtained from 15 and 216. FIG. 5 is a block diagram showing a detailed configuration of an embodiment of the television signal reproducing apparatus of the present invention. The same parts as those in FIG. 4 are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 5, reference numeral 200 denotes an analog-digital (hereinafter referred to as A) for converting an analog television signal supplied from the input terminal T into a digital television signal.
/ D) conversion circuit, 205 and 206 are color signals I and Q from the demodulator 204, and the I signal is 0 to 2.0 MHz.
And the Q signal is a horizontal low-pass filter (hereinafter referred to as H-LPF) that limits the band to 0 to 1.0 MHz, 207,
209, 211 and 213 are 1.
Time axis compression circuit for compressing 2679 times, 208, 21
Reference numerals 0, 212, and 214 are time-axis expansion circuits that expand the color signal and the luminance signal five times.

On the other hand, 223 and 225 are demodulation circuits for high-pass color signals and luminance signals of side images, 224 are inverse Nyquist filters 226 and 227 for band limiting to predetermined characteristics.
Is an H-LPF that limits the band to a band of 0 to 2.0 MHz,
228 and 229 are time axis compression circuits for compressing the time axis three times, and 230 is a side image high-pass color signal Ish of 0.3.
A bandpass filter (hereinafter, referred to as H-BPF) that obtains a high-frequency color signal Ish of a side image by band limiting to 1.5 MHz.
231) band-limits the high-frequency color signal Qsh and the luminance signal Ysh of the side image to 0.12-0.5 MHz and 0.84-4.2 MHz, respectively. H- for obtaining the high-frequency luminance signal Ysh
It is BSF.

Reference numeral 218 denotes the color signal Ic of the center image from the time axis compression circuit 207, the addition circuit 215 provides the low-frequency color signal I _SL of the side image from the decompression circuit 208 and the side image from the H-BPF 230. Color signal I in the high range
It is a splicer that splices together the signal I _SL + Ish obtained by adding sh. 219 is the time axis compression circuit 20.
The addition circuit 216 is added to the color signal Qc of the center image from 9
Is a splicer for joining the signal Q _SL + Qsh obtained by adding the low-band color signal Q _SL of the side image from the decompression circuit 210 and the high-band color signal Q sh of the side image from the H-BSF 231.

Reference numeral 220 denotes the high frequency luminance signal Ych of the center image from the compression circuit 211 and the H-BPF.
The splicer 221 for splicing the high-frequency color signal Ish of the side image from 230, from the decompression circuits 212 and 214 added by the addition circuit 217 to the low-frequency luminance signal Y _CL of the center image obtained from the compression circuit 213. The side image of the side image of the splicer splicing the luminance signal Y _SM + Y _SL 222, 222 is the splicer 220 and 2
Adder circuits 232, 233 and 2 for adding the outputs of 21
Reference numeral 34 is a progressive scan conversion circuit for color signals I, Q and luminance signal Y, and 235, 236 and 237 are digital-analog (hereinafter referred to as D / A) conversion circuits for converting digital signals into analog signals.

An embodiment of the television signal reproducing apparatus of the present invention has the above-mentioned structure, and its operation will be described below. In FIGS. 4 and 5, the television signal supplied to the input terminal T is converted into a digital signal by the A / D conversion circuit 200, and DC to 1.6 MHz and 1. to 1.6 MHz by the H-BSF (horizontal band split filter) 201. 6
The frequency is separated into a band of MHz to 4.2 MHz. A signal of DC to 1.6 MHz in the output signal is input to the time axis compression circuit 213 and the time axis expansion circuit 214, and the time axis compression circuit 213 converts the low frequency signal of the center image to 1.2674.
The time-axis expansion circuit 214 doubles the luminance signal Y of the side image multiplexed in the horizontal overscan unit.
The low-pass signal Y _SL (DC to 1.6 MHz) of is expanded five times.

In the filter output of the H-BSF 201, the component of 1.6 MHz to 4.2 MHz is IFAD2.
02, and the IFAD 202 subtracts a signal whose horizontal scanning line is separated by 262H as shown in FIG.
(A)) and addition (Fig. 6 (b)), 3 of the center image
Signal multiplexed in the dimensional hall and other 1.6 MHz
The above high frequency signals are separated. The high frequency signal of 1.6 MHz or more separated by the IFAD 202 is a Y / C separation circuit 2
It is input to 03 and separated into a luminance signal Y and a chroma signal C.

The luminance signal Y is supplied to the time axis compression circuit 21.
1 and the time axis expansion circuit 212, and in the time axis compression circuit 211, the high frequency signal (1.
(6 MHz or more) Ych is compressed by 1.2674 times, and the time axis expansion circuit 212 outputs the brightness signal Y _SM of 1.6 to 4.2 MHz (middle range) of the brightness signal of the side image multiplexed in the horizontal overscan unit. It grows 5 times. The high frequency signal Ych of the luminance signal of the compressed center image is connected by the splicer 220 to the high frequency signal Ysh of the side screen of the luminance signal, which will be described later.

The middle band signal Y _SM of the side screen luminance signal expanded by the time axis expansion circuit 212 is added to the low band signal Y _SM of the side screen brightness signal in the adder 217.
After being added to _SL, it is spliced in the splicer 221 with the low frequency signal Y _{CL of the} compressed luminance signal of the center screen. The outputs from the splicers 220 and 221 are added in the adder 222.

Next, the chroma signal C separated by the Y / C separation circuit 203 is input to the demodulation circuit 204, which demodulates the color signals I and Q. The color signal I
And Q are DC by H-LPF 205 and 206 respectively.
After the band is limited to 2.0 MHz and DC to 1.0 MHz, the color signal I is sent to the time axis compression circuit 207 and the time axis expansion circuit 208, and the color signal Q is sent to the time axis compression circuit 209 and the time axis expansion circuit 210. Is entered. The time axis compression circuit 2
In 07 and 209, the center color signals Ic and Qc are respectively compressed by 1.2674 times, and the time axis expansion circuit 20
In 8 and 210, the low-frequency signals I _SL and Q _SL of the color signals of the side image multiplexed in the horizontal overscan unit are expanded five times.

The expanded low frequency signals I _SL and Q _SL of the side image are added to high frequency signals Ish and Qsh of the side image color signals, which will be described later, in adders 215 and 216, respectively, and splicers 218 and 218, respectively. At 219, it is spliced with the color signals Ic and Qc of the compressed center image.

Next, the signal multiplexed in the three-dimensional hole of the center image is input to the demodulation circuit 223 and the inverse Nyquist filter 224, and the demodulation circuit 223 forms the first quadrant on the "time-vertical" two-dimensional frequency spectrum. The high frequency signal of the color signal I of the side image is demodulated by the carrier orthogonal to the carrier (so-called blow-out carrier) in the third quadrant and having a conjugate relationship with the color subcarrier. In addition, the inverse Nyquist filter 22
The signal band-limited by 4 is input to the demodulation circuit 225,
The demodulation circuit 225 demodulates the high frequency signals Ysh and Qsh of the luminance signal Y and the color signal Q of the side image, which are frequency-multiplexed by the blow-out carrier.

Next, in the H-LPFs 226 and 227, the high-frequency signals Ish, Ysh and Qsh of the demodulated side image color signal I and luminance signal Y and the color signal Q are respectively DC to DC.
After band limiting to 2.0 MHz, time axis compression circuit 228
And 229 compress the time axis three times. This compressed signal is 0.3 to 1.5 MHz for the I signal and 0.12 to 0.5 MH for the Q signal by the H-BPF 230 and the H-BSF 231.
The z and Y signals are band-limited to 0.84 to 4.2 MHz. Further, the high frequency signal Ish of the color signal of the side screen,
Qsh is added to the low-frequency signals I _SL and Q _SL of the side image color signal in the adder circuits 215 and 216, and the high-frequency signal Ysh of the side image luminance signal is added to the center image luminance signal in the splicer 220. High frequency signal Y
It is spliced to ch.

Finally, the color signals I and Q and the luminance signal Y obtained by splicing the center image and the side image are subjected to scanning line conversion in the sequential scanning conversion circuits 232 to 234, and further analogized by the D / A conversion circuits 235 to 237. It is converted into a signal and output. The characteristics of the various filters and the compression / expansion coefficient of the time axis compression / expansion circuit are merely examples, and are not necessarily limited to the above numerical values. Further, depending on the compression / expansion coefficient, a part of the horizontal blanking part may be used in the multiplex region of the low-frequency signal of the side image. In the above embodiment, the case where the low-frequency signals I _SL , Q _SL , Y _SL of the side image and the mid-frequency signal Y _SM of the luminance signal are all superimposed on the overscan portion of the center image has been described. Some or all of the above signals may be superimposed on the horizontal blanking section.

[0040]

As described above, the present invention has the above-described structure. Therefore, in the three-dimensional hole of the video signal of the center image, only the high frequency signals of the side image luminance signal and the color signal of which the power is small in the frequency spectrum of the video signal. , And the low-frequency signals of the high-power side image luminance signal and chrominance signal are multiplexed in the horizontal overscan section or the horizontal blanking section, so cross-color when reproduced on the current NTSC television receiver. It is possible to greatly reduce interference such as cross luminance and cross luminance, and a wide image can be displayed by using a dedicated wide aspect receiver.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of a television signal transmission device of the present invention.

FIG. 2 is a block diagram of an embodiment of a television signal transmission device of the present invention.

FIG. 3 is an operation explanatory diagram of the present invention.

FIG. 4 is a block diagram showing an outline of a television signal reproducing device of the present invention.

FIG. 5 is a block diagram of an embodiment of a television signal reproducing device of the present invention.

FIG. 6 is an operation explanatory diagram of the present invention.

[Explanation of symbols]

105-110 H-LPF 125-127 H-BPF 111, 113, 115, 128, 129, 130, 1
51,154 Time axis expansion circuit 112,114,116,153 Time axis compression circuit 120 Modulation circuit 121,122,155 Adder circuit 201 H-BSF 202 IFAD 203 Y / C separation circuit 205,206,226,227 H-LPF 218, 219, 220, 221 Splicer 215, 216, 217, 222 Adder 250 High-side processing circuit for side image

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI Technical display location H04N 7/093 9070-5C 9/64 V 8942-5C

Claims (2)

[Claims] 1. A side panel type television signal transmission device for transmitting a wide aspect television image by dividing it into a center image and side images and transmitting the luminance signal (Y) and color signals (I, Q) of the side image. ) For frequency-separating the low frequency band and the high frequency band, and a compression means for time-axis-compressing the low-frequency signals of the side image luminance signal (Y) and color signals (I, Q) separated by the frequency separating means. A first multiplexing means for frequency-multiplexing the time-axis-compressed side image low-frequency signals (Y, I, Q) to a horizontal overscan portion or a horizontal blanking portion of the video signal of the center image; and the frequency separating means. The high-frequency signals of the side image luminance signal (Y) and chrominance signals (I, Q) separated by 1. are provided with a second multiplexing means for multiplexing the three-dimensional hole of the video signal of the center image. Television signal transmission devices. 2. A wide aspect television image is divided into a center image and a side image, and the low-frequency signals of the luminance signal (Y) and the color signals (I, Q) of the side image are time-axis compressed to obtain the center image of the center image. The frequency signals are frequency-multiplexed in the horizontal overscan portion or the horizontal blanking portion of the video signal, and the high-frequency signals of the luminance signal (Y) and the color signals (I, Q) of the side image are multiplexed in the three-dimensional hole of the center image. In a television signal reproducing apparatus for reproducing a side panel type television signal to be transmitted, a brightness signal (Y) and a color signal (I, I, I, I) of a side image multiplexed in a horizontal overscan section or a horizontal blanking section of the center image. Q) a first demodulation means for demodulating a low-frequency signal, and a side image luminance signal (Y) and color signals (I, Q) multiplexed in the three-dimensional hole of the center image. Second demodulation means for demodulating the range signal, and the side image luminance signal (Y) and color signals (I, Q) demodulated by the first and second demodulating means as the center image luminance signal (Y) and It is characterized by further comprising an adding means for reproducing a wide aspect video signal by splicing the color signals (I, Q) and a projecting means for projecting a wide aspect image from the video signal obtained by the adding means. Television signal reproducing device.