JPS6276986A - Wide aspect television reproducing device - Google Patents

Abstract

PURPOSE:To attain the reproduction of an image having a longer aspect ratio in a lateral direction than a conventional television receiver by time-base compressing a picture signal including picture information, the aspect ratio of which is larger than the ratio of 4 to 3, separating it to a main picture signal and a sub picture signal and synthesizing the sub picture signal with the main picture signal after the time shifting of the sub picture signal. CONSTITUTION:At a picture signal separation circuit 19, a signal is separated to a main picture area A and a sub picture area B that is a picture part other than a main picture part, a sub picture signal being supplied to a time shift circuit 20. At the time shift circuit 20, the sub picture area B is moved to an area B within a vertical retrace period VBL, being supplied to a picture synthesizing circuit 21. At the picture synthesizing part 21, a main picture signal and the sub picture signal moved in the vertical retrace period VBL are synthesized, being supplied to a time extending circuit 22. Thereby, the synthesis and the transmission of the picture signal having the longer aspect ratio in the lateral direction than a television of existing NTSC system can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to television broadcasting that is compatible with current television receivers and that includes image information with an aspect ratio greater than 4:3 of current television signals. This invention relates to wide aspect television playback 7 that enables reception and display of images.

Conventional TechnologyCurrent NTSC (National Teledevice)
Approximately 25 years have passed since color television broadcasting began in 1961 using the color television system.

Meanwhile, with the demand for high-definition screens and improvements in the performance of television receivers, various new television systems have been proposed. Furthermore, the content of the programs being serviced is changing from simple studio programs and medium-sized programs to programs with higher image quality and more realistic images, such as the broadcast of cinema-sized movies.

Against this background, the Japan Broadcasting Corporation (Nl(K)) proposed a high-definition television system.
No. 0, 1982) The content is 112 scanning lines.
In addition to achieving high definition with 5 lines, interlaced scanning, and a brightness horizontal bandwidth of 20M11z, the screen aspect ratio was set to 3:5 from the viewpoint of visual engineering such as a sense of realism. This method has almost been completed in closed systems, and with the start of satellite broadcasting, the MUSE method (Reference, Tasuku Ninomiya et al., Satellite 1-channel transmission method for high-definition television) transmits high-definition television in the band of 1 satellite channel. (MUSE) (IEICE technical research report IE84-72.1984)),
Experiments are underway.

On the other hand, the current NTSC system has 525 scanning lines, interlaced scanning, horizontal brightness bandwidth of 4.2 MIIz, and aspect ratio of 4:3.
It has various specifications. FIG. 8 shows the signal structure of the current NTSC system. Image signal has an aspect ratio of 4:3
image part, horizontal retrace period HEL, vertical retrace period VEL
It becomes more. Horizontal scanning frequency fv is approximately 15,734 kll
z (horizontal scanning period TH is approximately 63.5 μs), vertical scanning frequency fv is approximately 6011z (vertical scanning synchronization Tv is approximately 1
/60S), and in the receiver, the vertical scanning sawtooth wave has a slope determined by the RC time constant and oscillates at the vertical synchronization frequency of the input image signal. Therefore, in the receiver, when the vertical synchronization frequency is 6011z, the vertical scanning is set to be deflected to the position of point P1. (For example, see the literature Broadcasting Technology Bibook, Color Television, edited by Japan Broadcasting Corporation, Japan Broadcasting Publishing Association, 1961) Current television receivers have various improvements, but cross-color (brightness signals are demodulated as color signals) , color interference), cross luminance (a phenomenon in which a color signal is reproduced as a luminance signal and causes a dot-shaped interference on the reproduced luminance screen), and interlace interference. In addition, when providing a movie as the program, it is effective to cut the screen size to the current TV receiver aspect ratio of 4:3, or compress it in the vertical (vertical) direction. The aspect ratio of the angle of view is transmitted to match the movie value.

Problems to be Solved by the Invention As mentioned above, when transmitting and servicing movie programs and immersive screens in current broadcasting, there are cases where the intention of the producer is not met, such as when the screen is partially canted or the screen area is small. There were problems such as not being able to convey the message sufficiently and the sense of presence being lost.

The present invention has been made in view of this point, and an object of the present invention is to provide a wide aspect television playback device having an aspect ratio that is even longer than the current television playback device.

Means for Solving the Problems In order to solve the above problems, the wide aspect television playback device of the present invention includes means for time-base compressing an image signal containing image information with an aspect ratio larger than 4:3;
means for separating the time-axis compressed image signal into a main image signal and a sub-image signal; means for time-shifting the sub-image signal; and combining the main image signal and the time-shifted sub-image signal. The present invention is provided with a configuration including a means for doing so.

Effect: The present invention receives an image signal containing image information with an aspect ratio larger than 4:3 using the above-mentioned configuration, and makes it possible to reproduce an image having an aspect ratio that is more horizontally elongated than that of a conventional television receiver. .

Embodiment Below, before explaining a wide aspect television playback device according to an embodiment of the present invention, a method for synthesizing a wide aspect television signal containing image information with an aspect ratio larger than 4=3 will be explained with reference to the drawings. .

FIG. 5 shows a block diagram of a first example of a wide aspect television signal combining apparatus. In Figure 5,
18 is an input terminal for a horizontally elongated image signal with an aspect ratio of 4:3, 19 is an input terminal for a horizontally elongated image signal with an aspect ratio of 4:3,
An image separation circuit that separates a main image signal consisting of an image portion with an aspect ratio of 4:3 and a sub-image signal consisting of an image portion other than the main image signal; 20 is a time shift circuit that shifts the temporal position of the sub-image signal; , 21 is an image synthesis circuit that synthesizes the main image signal and the temporally shifted sub-image signal to obtain a synthesized image signal, and 22 temporally expands the synthesized image signal in the horizontal direction to obtain a wide aspect television signal. A time expansion circuit, 23 an output terminal for a wide aspect television signal having a main image signal and a sub image signal, and 24 a wide aspect television signal synthesis circuit.

The operation of the wide aspect television signal synthesis apparatus configured as described above will be described below with reference to FIGS. 5 and 6.

First, FIG. 6 shows the process of synthesizing image signals by the wide aspect television signal synthesizing device of FIG.
In this example, the horizontal scanning frequency fH is set to 15, which is the same as the NTSC system of current televisions.
734kllz (horizontal scanning period Tel = 1 /
f o #63.5μ5ec), and the width of the horizontal retrace period HBL is also the same. The vertical scanning frequency fv is a lower frequency than the current NTSC system (vertical scanning period T'v
> Tv = 1/60sec). The wide-aspect image is shown in Figure 6 (area of A1 and Bl), and the number of horizontal scanning lines in (B) is about 490, which is the same as the current NTSC system (in the case of interlaced scanning, Therefore, as mentioned above, since the vertical scanning frequency fv is set lower than that of the current NTSC system, the number of horizontal scanning lines increases, and the vertical blanking period VBLO width is wider than that of the current NTSC system.

In the image separation circuit 19 of FIG. 5, the main image area diagram which is the image part with the aspect ratio of 4:3 of the wide aspect image of FIG. 6(a) and the sub-image area @( The separated main image signals are supplied to an image synthesis circuit 21, and the separated sub-image signals are supplied to a time shift circuit 20.In the time shift circuit 20, the sub-image signals of FIG. Area (B) is transferred to area (8) within the vertical blanking period VBL in FIG. The sub-image signals transferred to the sub-image signals are synthesized to obtain the synthesized image signal shown in FIG. 6(b), which is supplied to the time expansion circuit 22.

In the time expansion circuit 22, the area (5) of the synthesized image signal in FIG. 6(b) and the image portion in (B) are time expanded in the horizontal direction and outputted as a wide aspect television signal fc) in the same figure. Output to terminal 23.

As described above, according to this embodiment, the aspect ratio is 4:3.
From a larger image signal, images on both sides of an image with an aspect ratio of 4:3 are temporally moved onto the horizontal scanning line during the vertical retrace period, which is increased by setting the vertical scanning frequency to a lower frequency than the current NTSC system. Placed and aspect ratio 4
:3 image and then time expansion, it is possible to synthesize and transmit an image signal with an even wider aspect ratio than the current NTSC television.

FIG. 7 is a block diagram of a wide aspect color television signal synthesis apparatus using the first example wide aspect television signal synthesis apparatus, showing a second example. In the same figure, 25 is a wide aspect color camera that captures color images with an aspect ratio larger than 4:3, and 26 is a wide aspect color camera that captures image signals of the three primary colors R, G, and B, as well as a luminance signal Y and a wideband color signal I. , a matrix conversion circuit for converting into narrowband color signal Q, 27 is a delay circuit for luminance signal Y,
28 is a low-pass filter for the color signal I, 29 is a low-pass filter for the color signal Q, 30.31.32 is the wide aspect television signal synthesis circuit shown in FIG. 124 of the first example, 33 is a balanced modulator that performs color modulation; 34 is an addition circuit for a color signal that is balanced modulated with a luminance signal; and 35 is an output terminal for a wide aspect color television signal.

The operation of the wide aspect color television signal synthesis apparatus configured as described above will be described below.

The wide aspect color image captured by the wide aspect color camera 25 is supplied to the matrix conversion circuit 26 in the form of three primary color signals R, G, and B. In the matrix conversion circuit 26, the wide aspect color image of the three primary color signals R, G, and B is converted into a luminance signal Y, a wideband color signal I, and a narrowband color signal Q by matrix conversion of the NTSC system, and a delay circuit 27, Low pass filter 28
．． 29. In the delay circuit 27, the luminance signal Y
is delayed by the amount that the color signals I and Q are delayed by the low-pass filters 28 and 29, and the wide aspect television signal synthesis circuit 3
0. In the low-pass filters 28 and 29, the wide-band chrominance signal I and the narrow-band chrominance signal Q are low-pass filtered, and are passed through wide aspect television signal synthesis circuits 31 and 32, respectively.
supplied to In the wide aspect television signal synthesis circuits 30, 31, and 32, the luminance signal Y
, wideband chrominance signal I, and narrowband chrominance signal Q are combined into a wide aspect television signal using the method described in the first example, and the combined luminance signal Y is sent to the adder 34 as the combined wideband chrominance signal. I and the narrowband color signal Q are supplied to a balanced modulation circuit 33. In the balanced modulation circuit 33,
The broadband color signal I and the narrowband color signal Q each have a frequency of 3.
58Ml1z, the signal is balancedly modulated using color subcarriers having a phase difference of 90 degrees, and is supplied to the adder 34. The adder 34 adds the luminance signal Y and the balanced modulated color signal, and outputs a wide aspect color television signal from the output terminal 35.

As described above, by using the wide aspect television synthesis circuit for each of the luminance signal Y, wideband chrominance signal ■, and narrowband chrominance signal Q, it is possible to synthesize and transmit a wide aspect television image of a color image. .

An embodiment of the present invention that receives the wide aspect television signal synthesized as described above and projects it on a picture tube.
The wide aspect television playback device of Example E will be described with reference to the drawings.

FIG. 1 shows the configuration of a wide aspect television playback apparatus according to a first embodiment of the present invention. 1st
In the figure, 1 is an input terminal for the wide aspect television signal, 2 is a time axis compression circuit, 3 is an image separation circuit that separates the wide aspect television signal into a main image signal and a sub image signal, and 4 is an input terminal for the sub image signal. 5 is a time shift circuit for shifting the temporal position; 5 is an image synthesis circuit for synthesizing the main image signal and the sub-image signal whose temporal position has been shifted to obtain a wide aspect image signal; 6 is an output terminal for the wide aspect image signal; 7 shows a wide aspect television playback circuit.

The operation of the wide aspect television playback apparatus configured as described above will be described below with reference to FIGS. 1 and 2.

First, FIG. 2 shows the process of reproducing an image signal by the wide aspect television reproducing apparatus shown in FIG. FIG. 2 (+1 is the wide aspect television signal synthesized by the wide aspect television signal synthesizer of the first example described above, which is input to input terminal 1 in FIG. 1; in this example, the horizontal scanning frequency fH The current television's NTSC system is 15,734 kllz (
Horizontal scanning period T.

= 1/fH#63.5 μsec, and the width of the horizontal retrace period (I+3L) is also the same. The vertical scanning frequency fv is set to a frequency similar to the current NTSC standard (vertical scanning period T'v>Tv = 1/60 sec), and the above-mentioned sub-image information is placed in the area (B1) during the vertical blanking period VBL.

This wide aspect television signal is subjected to time axis compression in the horizontal direction in the time axis compression circuit 2 as shown in FIG. Supplied. In the image separation circuit 3, the main image area diagram of FIG. - Supplied to circuit 4.

In the time shift circuit 4, the sub-image signal in the area (Bl) of the vertical retrace period shown in FIG. The image synthesis circuit 5 synthesizes the separated main image signal and the sub-image signal which has been temporally returned to its original position, and is supplied to the image synthesis circuit 5. A wide aspect image signal shown in (C) is obtained and outputted from the output terminal 6, so that a wide aspect image can be reproduced on a cathode ray tube or the like.

As described above, according to this embodiment, a television signal carrying images on both sides of a wide aspect image is received during the vertical retrace period, the signal is compressed on the time axis, and the wide aspect image during the vertical retrace period is By returning the images on both sides of the aspect image to their original positions and displaying them, it becomes possible to reproduce a laterally elongated image than the conventional image with an aspect ratio of 4:3.

A second embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a block diagram of a wide aspect color television playback apparatus showing a second embodiment of the present invention. In the figure, 8 is an input terminal for a wide aspect color television signal synthesized by the above-mentioned second example wide aspect color television signal synthesis device containing image information with an aspect ratio larger than 4=3, and 9 is a luminance input terminal. a YC separation circuit that separates the signal Y and the color signal C; 10 is a delay circuit;
11 is a band amplifier circuit, 12 is a color demodulation circuit, 13.14.
15 is a wide aspect television playback circuit shown in FIG. 7 of the first embodiment; 16 is an inverse matrix conversion circuit;
17 indicates a picture tube.

The operation of the wide aspect color television reproducing apparatus configured as described above will be described below.

The wide aspect color television signal containing the sub-picture signal during the vertical blanking period VBL is input to the YC separation circuit 9 through the input terminal 8. In the YC separation circuit 9, the wide aspect color television signal is separated into a luminance signal Y and a color signal C modulated by a 3.58 MHz subcarrier, the former being sent to a delay circuit 10 and the latter being sent to a band amplifier circuit 11. supplied to In the delay circuit 10, the luminance signal Y is delayed by the time necessary for demodulating the color signal and is supplied to the wide aspect television reproduction circuit. In the band amplification circuit 11 , the color signal C is band-amplified and supplied to the color demodulation circuit 12 . Color demodulation circuit 12
, the broadband color signal (2) and the narrowband color signal (Q) which have been balanced-modulated at 3.58 MIIz are demodulated and supplied to wide-aspect television reproduction circuits 14 and 15, respectively. Wide aspect television playback circuit 13.14
．． At step 15, the luminance signal Y, wide-band chrominance signal 2, and narrow-band chrominance signal Q, which are wide-aspect image signals, are obtained by the method described in the first embodiment, and are supplied to the inverse matrix conversion circuit 16. Inverse matrix conversion circuit 1
6, the luminance signal Y, wideband color signal 2, and narrowband color signal Q are converted into three primary color signals ROB and supplied to the picture tube 17 by inversely converting the conversion performed by the matrix conversion circuit 26 in FIG. Ru. In the picture tube 17, 4:
The light is deflected to have an aspect ratio greater than 3, and a wide aspect color image is reproduced on the picture tube.

As described above, by using the wide aspect television reproduction circuit of the first embodiment for the luminance signal Y, wideband chrominance signal I, and narrowband chrominance signal Q, it is possible to reproduce a color wide aspect television image. becomes.

Figure 4 (al) is an image received by a wide-aspect television receiver; the aspect ratio of the receiver's display is wider than the 4:3 aspect ratio of a conventional NTSC television receiver. As explained in the example, a wide aspect television signal is received, the main image area hole and the sub image area (Bl) are rearranged as shown in the same figure, and the horizontal scanning sawtooth wave and vertical scanning sawtooth waveform shown in the same figure are created. By scanning with waves, wide aspect images can be reproduced.

On the other hand, Figure 4 (bl) shows the case where a wide aspect television signal is received by a current NTSC system television receiver.The wide aspect television signal has a vertical scanning frequency lower than that of the current NTSC system. As shown in the figure, the vertical scanning sawtooth wave is
In the current NTSC system, what was deflected to the position of point P1 will be overscanned to the position of point P2.

Therefore, the sub-image (
Bl does not appear on the screen, and only the main image with an aspect ratio of 4:3 is displayed.

Note that the first and second embodiments are examples that maintain compatibility with current NTSC system receivers, but the horizontal scanning frequency and chromaticity demodulation method are the same as other television systems. By doing so, wide aspect television playback that is compatible with that type of television receiver is possible.

In addition, in the second embodiment, wide aspect television was reproduced for the luminance signal Y, the wideband color signal ■, and the narrowband color signal Q, but this is based on the three primary color signals input to the picture tube. It is also possible to perform this for RGB. Furthermore, regarding the color signal, it is also possible to perform wide aspect television reproduction on the color signal C before color demodulation.

Effects of the Invention As described above, according to the present invention, when transmitting or servicing movies or programs with a sense of realism, images with an aspect ratio of 5:3, for example, can be played back as they are on the receiver.
It is possible to sufficiently convey the sense of presence and the intention of the program author, and it also maintains compatibility without causing interference when received by current television receivers, making it extremely effective industrially.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a wide aspect television reproduction circuit according to a first embodiment of the present invention, FIG. 2 is a principle diagram showing the image signal reproduction process to explain the operation of FIG. 1, and FIG. 4 is a block diagram of a wide aspect color television reproducing apparatus according to a second embodiment of the present invention, FIG. 4 is a principle diagram showing how a wide aspect image is reproduced, and FIG.
The figure is a block diagram of the wide aspect television signal synthesis device of the first example, Fig. 6 is a principle diagram showing the image signal synthesis process to explain the operation of Fig. 5, and Fig. 7 is the second example. FIG. 8 is a diagram showing the configuration of an image signal of a conventional NTSC television receiver. 2... Time axis pressure front circuit, 3... Image separation circuit, 4... Time shift circuit, 5...
・Image synthesis circuit, 7...Wide aspect television playback circuit, 9...VC separation circuit, 10
... Delay circuit, 11 ... Bandwidth amplifier circuit, 12 ... Color demodulation circuit, 13.14.15 ...
...Wide aspect television playback circuit, 16
...Inverse matrix conversion circuit, 17...
Picture tube, 19... Image separation circuit, 20...
...Time shift circuit, 21... Image one-image synthesis circuit, 22... Time expansion circuit, 24... Wide aspect television signal synthesis circuit, 25...
・・・Wide aspect color camera, 26...
・Matrix conversion circuit, 27...Delay circuit, 2
8.29...Low pass filter, 30.31.32.
... Wide aspect television signal synthesis circuit, 33 ... Balanced modulation circuit, 34 ... Adder. Name of agent: Patent attorney Toshio Nakao (1 person) 1st figure 2nd figure = car 5th figure 1 -------Ikkyo Ichiichi Sakaki--------Kai-------
---Ken------------Kiichi----Akebono--------
Figure 6) IBL Figure 8

Claims (1)

[Claims] means for time-axis compressing an image signal including image information having an aspect ratio larger than 4:3; means for separating the time-axis compressed image signal into a main image signal and a sub-image signal; 1. A wide aspect television reproducing apparatus, comprising: means for time-shifting; and means for synthesizing the main image signal and the time-shifted sub-image signal.