JPH10191197A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a content of a video image with high quality without a sense of jaggedness by generating a synthesis video signal for 2-screen display and applying scanning line interpolation to the synthesis video signal for 2-screen display adaptively to a motion so as to obtain a noninterlacing scanning signal. SOLUTION: In the synthesis processing, a selector 4 is controlled with a switching control signal from a synchronization processing section 35 to place a video signal read from a line memory 24 to a first half of a horizontal scanning period and to place a video signal that is read from a field memory 34 and subject to vertical compression processing by a vertical compression processing circuit 9 to the latter half of the horizontal scanning period thereby obtaining a synthesis video signal. The video signal synthesized in this way is given to a motion adaptive noninterlace scanning conversion processing circuit 10. The motion adaptive noninterlace scanning conversion processing circuit 10 interpolates scanning lines adaptively to a motion and adjusts a luminance level of the interpolated scanning line based on a vertical compression rate control signal of a main screen video image given from an input signal discrimination processing circuit 8 and provides an output of a signal. Then the signal is outputted to a display device 6 via a D/A converter circuit 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver for simultaneously displaying two different images in left and right regions of a display screen having a wide aspect ratio.

[0002]

2. Description of the Related Art With respect to a conventional television receiver of this type, the applicant of the present application has considered the one shown in FIGS. FIG. 9 is a block diagram showing a schematic configuration of a television receiver, FIG. 10 is an explanatory diagram schematically showing scan conversion processing, and FIG. 11 is a waveform diagram used for explanation during a two-screen display operation. The television receiver here is a so-called wide aspect television receiver.

In the figure, 1 is an input circuit, 2 is a main screen signal processing circuit, 3 is a sub-screen signal processing circuit, 4 is a selector, 5 is a D
A / A conversion circuit, 6 is a display such as a CRT, and 7 is a deflection processing circuit.

[0004] An input circuit 1 is used to selectively input an NTSC video signal or a second generation EDTV video signal for terrestrial broadcasting.
NTS from HF / VHF tuner 11 and various storage media
Video input terminal 12 to which a C-system video signal is input
A high-vision compatible BS tuner 13 to which a MUSE video signal in satellite broadcasting is input; a MUSE input terminal 14 to which a MUSE video signal is input from various storage media; a MUSE-NTSC converter 15;
A MUSE-type video signal input from one of the S tuner 13 and the MUSE input terminal 14 is output to the MUSE-N
A changeover switch 16 for selectively inputting to the TSC converter 15; and a first switching circuit 17 for selectively inputting any one of the video signals input from the three input systems 11, 12, 16 to the main screen signal processing circuit 2. And a second switching circuit 18 for selectively inputting any one of the video signals input from the three input systems 11, 12, and 16 to the sub-screen signal processing circuit 3. That is, the input circuit 1 includes a main screen signal processing circuit 2 and a sub-screen signal processing circuit in a format in which one of a plurality of types of video signals is unified into a scanning line of the NTSC system according to a user's selection operation. 3 is input.

[0005] The main screen signal processing circuit 2 includes an A / D converter 21 for digitizing a video signal input through the first switching circuit 17 of the input circuit 1 and a digital signal for converting the video signal into a luminance signal. Y / C separation unit 22 for separating into chroma signals
A color demodulation unit 23 for demodulating the separated chroma signal into a color difference signal; a line memory 24 for accumulating a luminance signal and a color difference signal; a write / read control signal for the line memory 24; A synchronization processing unit 25 for generating a read control signal and a control signal relating to synchronization of the main screen video system.

The sub-screen signal processing circuit 3 includes an A / D converter 31 for digitizing a video signal input via the second switching circuit 18 of the input circuit 1 and a digital signal for converting the digitally converted video signal into a luminance signal. Y / C separation unit 32 for separating into chroma signals
A color demodulation processing unit 33 for demodulating the separated chroma signal into a color difference signal, a field memory 34 for storing a luminance signal and a color difference signal, and a synchronization processing unit 35 for generating a write control signal for the field memory 34. including.

[0007] The selector 4 is provided with a video signal read from the line memory 24 of the main screen signal processing circuit 2 and a sub-screen signal processing based on a switching control signal generated by the synchronization processing section 25 of the main screen signal processing circuit 2. The video signal read from the field memory 34 of the circuit 3 is selectively converted to D / A
This is output to the conversion circuit 5. That is, the selector 4
Is controlled to output, for example, only the video signal from the main screen signal processing circuit 2 in the case of one-screen display, and in the case of two-screen display, the video from the main screen signal processing circuit 2 is controlled. The signal and the video signal from the sub-screen signal processing circuit 3 are controlled to be alternately output at a required period.

The D / A conversion circuit 5 converts a video signal for one-screen display or a composite video signal for two-screen display given from the selector 4 into an analog signal and inputs the analog signal to the display 6.

The display 6 has a screen with an aspect ratio of 9:16, and the entire screen is displayed in accordance with a video signal for one-screen display or a composite video signal for two-screen display provided from the D / A conversion circuit 5. One image is displayed in the area, or two different images are simultaneously displayed in the left and right areas of the screen.

The deflection processing circuit 7 generates a deflection pulse for scanning the display 6 and, based on a control signal supplied from the synchronization processing section 25 of the main screen signal processing circuit 2, a video signal for one screen display. And a composite video signal for two-screen display is compressed or expanded in the vertical direction.

Next, the operation of the television receiver having the above configuration will be described.

One-screen display When a one-screen display and a type of display image are designated by the user, a corresponding video signal is selectively input from the input circuit 1 to the main-screen signal processing circuit 2.

In the main screen signal processing circuit 2, an input video signal is digitized by an A / D conversion circuit 21, and a horizontal synchronizing signal and a vertical synchronizing signal are separated from the video signal by a synchronizing processing unit 25, and the line memory 24, a write control signal, a read control signal, a switching control signal of the selector 4 and the like.

The write control signal generated by the synchronization processing section 25 causes the line memory 24 to be supplied to the Y / C separation section 22.
, And the color difference signal from the color demodulation processing unit 23, and reads the luminance signal and the color difference signal from the line memory 24 by the read control signal generated by the synchronization processing unit 25. At this time, in order to prevent flicker, scan conversion processing is performed from interlaced scanning to sequential scanning. In this scan conversion process, each scan line is read twice and interpolated by performing a so-called double-speed scan in which the line memory reset cycle of the read control signal is set to twice the write control signal.
That is, as shown in FIG. 10, the scanning line to be interpolated is the same as the current scanning line.

The read luminance signal and color difference signal are supplied to a D / A conversion circuit 5 via a selector 4 and converted into an analog signal. At this time, the selector 4 is controlled so as to always output only the video signal given from the main screen signal processing circuit 2.

The main screen video signal is output to the display 6. At this time, the deflection processing circuit 7 generates a deflection pulse based on the horizontal / vertical synchronization signals supplied from the synchronization processing circuit 25 of the main screen signal processing circuit 2, and controls the vertical scanning period, timing, and scanning density. Performs expansion / compression processing in the vertical direction.

As a display mode, when an input video signal is in an NTSC system having an aspect ratio of 3: 4,
Black band on left and right of aspect ratio 3: 4 video (no image area)
Normal mode to attach, full mode to stretch only the horizontal direction of the aspect ratio 3: 4 image to the full screen,
The user can select from a zoom mode that stretches the aspect ratio of the 4: 4 image equally in the vertical and horizontal directions, and a wide zoom mode (just mode) that displays the aspect ratio 3: 4 image on the entire screen with the aspect ratio of 9:16 without discomfort. The read timing of the line memory 24, the read timing,
By controlling the read clock, horizontal expansion / compression processing is performed. On the other hand, if the input video signal is in the letterbox format with an aspect ratio of 9:16, an image with a roundness of “1” is displayed on the entire screen of the display 6.

[0018] 2-screen display User by dual-screen display, the types and kinds of display images of the sub-screen side of a display image of the main screen side is designated, two video signal, for example FIG. 11 corresponds from the input circuit 1
(A) and (b) are selectively input to the main screen signal processing circuit 2 and the sub screen signal processing circuit 3, respectively.

The processing up to the writing of the video signal input to the main screen signal processing circuit 2 to the line memory 24 is the same as that in the case of the one-screen display, so that the description is omitted.

On the other hand, in the sub-screen signal processing circuit 3, an input video signal is digitized by an A / D conversion circuit 31, and a horizontal synchronizing signal and a vertical synchronizing signal are separated from the video signal by a synchronizing processor 35. A write control signal for the field memory 34 is generated.

The write control signal generated by the synchronization processing unit 35 causes the Y / C separation unit 3 to
2 and a color difference signal from the color demodulation processing unit 33. The frequency of the write clock to the field memory 34 is set to be the same as the frequency of the write clock to the line memory 24.

The scan conversion process, the horizontal compression process, and the synthesis process are performed by the line memory 24, the field memory 34, and the selector 4. First, the scan conversion processing is the same as the case of the above-described one-screen display. The horizontal compression process is performed by setting the frequency of the read clock for the line memory 24 and the field memory 34 to twice the frequency of the read clock for displaying one screen. For this reason, it is quadrupled when combined with double-speed scanning for scan conversion. Further, in the synthesizing processing, the selector 4 is switched and controlled by the switching control signal of the synchronization processing unit 35, and the main screen video signal read from the line memory 24 as shown in FIG. ,
This is performed by arranging the sub-screen video signal read from the field memory 34 as shown in FIG. 11D in the latter half of the horizontal scanning period to obtain a composite video signal as shown in FIG. 11E.

The synthesized video signal is output to the display 6, and the vertical processing period, timing, and
By controlling the scanning density, expansion / compression processing in the vertical direction is performed.

[0024]

By the way, in the prior art, a scan conversion process in which interlaced scanning is sequentially performed to prevent flicker is performed. In this case, the current scanning line and the interpolated scanning line are made the same. Therefore, it is pointed out that unnaturalness is conspicuous particularly in moving images, for example, the same scanning line is twice written, and as a result, diagonal lines of the displayed image become jagged steps. It is pointed out that in the case of screen display, the displayed image is reduced to less than half and the image content is difficult to understand.

Accordingly, it is an object of the present invention to improve the visibility of video content in a television receiver, particularly when displaying two screens.

[0026]

SUMMARY OF THE INVENTION The present invention provides a television receiver for simultaneously displaying two different images in the left and right regions of a wide aspect ratio display screen.
A composite video signal for two-screen display is created by arranging two different interlaced video signals in the first half and the second half of the horizontal scanning period, and a scanning line adapted to the motion is placed between each scanning line of the composite video signal. Interpolation is performed so that sequential scanning can be performed.

This makes it possible to perform two-screen display by sequential scanning. In addition, when a progressive scan signal is used, interpolation is performed on the scan line that adapts to the movement. Therefore, in the case of a still image, a high-resolution image is realized by using the previous field information in the interpolation scan line, and in the case of a moving image, the spatial correlation is used. Realization of a smooth image by line interpolation using
The video content can be made high-quality without jaggedness unlike the conventional one.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention is directed to a television receiver for simultaneously displaying two different images in left and right regions of a wide-aspect ratio display screen. Using the interlaced video signal, a composite video signal for two-screen display for simultaneously displaying different videos on the left and right regions of the display screen is created, and the composite video signal for two-screen display is adapted to motion. Then, by performing scanning line interpolation, a sequential scanning signal is obtained.

In this case, two-screen display by sequential scanning can be performed. In addition, when a sequential scanning signal is used, a scanning line adapted to the motion is interpolated, so that the current scanning line and the interpolation scanning line are associated with each other.

According to a second aspect of the present invention, there is provided a television receiver for simultaneously displaying two different images in left and right regions of a display screen having a wide aspect ratio, wherein two different interlaced scanning images are inputted. Recognizing each aspect ratio of the signal, determining a vertical compression ratio for setting the roundness of each video signal displayed on two screens to "1", using the two different interlaced video signals, 2 for simultaneously displaying different images on the left and right areas of the display screen
A composite video signal for screen display is created, and the composite video signal for two-screen display is converted into a progressive scan signal by performing scanning line interpolation according to motion, and based on the determined vertical compression ratio for the composite video signal. The display device to perform a deflection process on the display device.

In this case, in addition to the effect of the first aspect, an image having a roundness of "1" is displayed in the left and right regions of the screen.

According to a third aspect of the present invention, there is provided a television receiver which simultaneously displays two different images in the left and right regions of a wide aspect ratio display screen, and receives two different interlaced scanning images. Recognizing each aspect ratio of the signal, and when two video signals have different aspect ratios, determines a vertical compression ratio for setting the roundness of the video signal for the main screen displayed on the main screen to "1". In addition, a horizontal / vertical compression ratio for setting the roundness of the sub-screen video signal to be displayed on the sub-screen to "1" is determined, and the vertical compression signal processing is performed on the main-screen video signal. Instead, the video signal for the sub-screen is signal-processed so as to have the determined horizontal and vertical compression ratios. Then, using these two different video signals, different video images are displayed in the left and right regions of the display screen. At the same time Creates a composite video signal for two-screen display for Shimesuru, the composed video signal for two-screen display and sequential scanning signal by adapting to the motion interpolated scanning line,
A deflection process for a display is performed based on the determined vertical compression ratio for the existence period of the video signal for the main screen in the composite video signal.

In this case, the operation is the same as that of the second aspect.
However, as processing for setting the roundness to “1”, the main screen side performs the deflection processing and the other sub-screen side performs the deflection processing only, or performs the signal processing and the deflection processing. Therefore, signal processing can be reduced, which contributes to simplification of the configuration.

According to a fourth aspect of the present invention, there is provided a television receiver for simultaneously displaying two different images in left and right regions of a display screen having a wide aspect ratio. Recognizing each aspect ratio of the signal, and when two video signals have different aspect ratios, determines a vertical compression ratio for setting the roundness of the video signal for the main screen displayed on the main screen to "1". In addition, a horizontal / vertical compression ratio for setting the roundness of the sub-screen video signal to be displayed on the sub-screen to "1" is determined, and the vertical compression signal processing is performed on the main-screen video signal. Instead, the video signal for the sub-screen is signal-processed so as to have the determined horizontal and vertical compression ratios. Then, using these two different video signals, different video images are displayed in the left and right regions of the display screen. At the same time A composite video signal for two-screen display is generated to show the composite video signal for two-screen display, and the synthesized video signal for two-screen display is interpolated into scanning lines by adapting to the motion to form a sequential scanning signal. Reducing the luminance level according to the vertical compression ratio of the video signal for the main screen,
A deflection process for a display is performed based on the determined vertical compression ratio for the existence period of the video signal for the main screen in the composite video signal.

In this case, in addition to the effect of the third aspect, since the brightness level of the interpolated scanning line obtained by converting the interlaced scanning into the sequential scanning is adjusted, the scanning density by the vertical compression of the deflection processing is adjusted. This makes it possible to keep the brightness of the displayed video constant.

According to a fifth aspect of the present invention, there is provided a television receiver for simultaneously displaying two different images on the left and right regions of a display screen having a wide aspect ratio. Main screen signal processing means for digitizing and accumulating a signal, compressing the signal in the horizontal direction and outputting the compressed signal, and digitizing and accumulating an input required type of interlaced video signal in the horizontal direction; 2
Sub-screen signal processing means for compressing and outputting the image data, and sequentially combining each line of two different interlaced video signals output from each processing means in the first half and the second half of the horizontal scanning period. Thus, a synthesizing means for obtaining a composite video signal for two-screen display, and a motion-adaptive progressive scan conversion means for converting the composite video signal for two-screen display into a progressive scan signal by interpolating scanning lines according to motion. It is characterized by including.

The fifth aspect corresponds to the subordinate concept of the first aspect, and is substantially the same as the operation of the first aspect.

According to a sixth aspect of the present invention, there is provided a television receiver for simultaneously displaying two different images in the left and right regions of a display screen having a wide aspect ratio. Main screen signal processing means for digitizing and accumulating a signal, compressing the signal in the horizontal direction and outputting the compressed signal, and digitizing and accumulating an input required type of interlaced video signal in the horizontal direction; 2
Sub-screen signal processing means for compressing and outputting the video signal, recognition means for recognizing each aspect ratio of the video signal input to the main screen signal processing means and the video signal input to the sub-screen signal processing means, and the recognition means A first management means for determining a vertical compression rate for setting the roundness of a video signal displayed on the main screen to "1" based on the recognition result of the above and outputting a vertical compression rate control signal to the following deflecting means When the two video signals have different aspect ratios as a result of the recognition by the recognition means, the horizontal compression ratio and the vertical compression ratio for setting the roundness of the video signal displayed on the sub-screen to "1" are set. A second management means for outputting a horizontal compression rate control signal to the sub-screen signal processing means and a vertical compression rate control signal to the following vertical compression processing means; and a vertical compression rate control provided from the second management means. Based on the signal, Vertical compression processing means for vertically compressing a video signal output from the plane signal processing means; and a video signal output from the main screen signal processing means and a video signal output from the vertical compression processing means in the first half of a horizontal scanning period. And the latter half are sequentially combined to form 2
Synthesizing means for obtaining a composite video signal for screen display; motion adaptive progressive scan conversion means for converting the composite video signal for two-screen display into progressive scan signals by interpolating scanning lines according to motion; The synthesized video signal for two-screen display is converted into an analog signal, and a deflection process is performed on the synthesized video signal based on a vertical compression ratio control signal provided from the determination unit in the first half of the horizontal scanning period of each scanning line. Means.

The sixth aspect corresponds to the subordinate concept of the third aspect, and has almost the same function as that of the third aspect.

According to a seventh aspect of the present invention, there is provided a television receiver for simultaneously displaying two different images on the left and right regions of a display screen having a wide aspect ratio. Main screen signal processing means for digitizing and accumulating a signal, compressing the signal in the horizontal direction and outputting the compressed signal, and digitizing and accumulating an input required type of interlaced video signal in the horizontal direction; 2
Sub-screen signal processing means for compressing and outputting the video signal, recognition means for recognizing each aspect ratio of the video signal input to the main screen signal processing means and the video signal input to the sub-screen signal processing means, and the recognition means A first management means for determining a vertical compression rate for setting the roundness of a video signal displayed on the main screen to "1" based on the recognition result of the above and outputting a vertical compression rate control signal to the following deflecting means When the two video signals have different aspect ratios as a result of the recognition by the recognition means, the horizontal compression ratio and the vertical compression ratio for setting the roundness of the video signal displayed on the sub-screen to "1" are set. A second management means for outputting a horizontal compression rate control signal to the sub-screen signal processing means and a vertical compression rate control signal to the following vertical compression processing means; and a vertical compression rate control provided from the second management means. Based on the signal, Vertical compression processing means for vertically compressing a video signal output from the plane signal processing means; and a video signal output from the main screen signal processing means and a video signal output from the vertical compression processing means in the first half of a horizontal scanning period. And the latter half are sequentially combined to form 2
Synthesizing means for obtaining a synthesized video signal for screen display, motion adaptive progressive scan conversion means for converting the synthesized video signal for two screen display into a progressive scan signal by interpolating scanning lines according to motion, and a motion adaptive type Brightness adjusting means for reducing the brightness level of the scanning line interpolated by the progressive scanning conversion means in accordance with the ratio of the vertical compression ratio determined by the first management means; and a composite video signal for two-screen display, which is a progressive scanning signal And a deflecting unit for deflecting the first half of the horizontal scanning period of each scanning line in the composite video signal based on a vertical compression ratio control signal given from the determining unit.

The seventh aspect corresponds to a subordinate concept of the fourth aspect, and is substantially the same as the operation of the fourth aspect.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

FIGS. 1 to 5 relate to the first embodiment, FIG. 1 is a block diagram showing a schematic configuration of a television receiver, FIG. 2 is a block diagram showing a schematic configuration of a motion adaptive progressive scan conversion circuit, FIG. 3 is an explanatory diagram schematically showing an interpolation process by a motion adaptive progressive scanning conversion circuit, FIG. 4 is an explanatory diagram showing various two-screen display examples, and FIG. 5 is used to explain an operation at the time of two-screen display. It is a waveform diagram. Here, a so-called wide aspect television receiver is illustrated.

In the figure, 1 is an input circuit, 2 is a main screen signal processing circuit, 3 is a sub-screen signal processing circuit, 4 is a selector, 5 is a D
/ A conversion circuit, 6 is a display such as a CRT, 7 is a deflection processing circuit, 8 is an input signal discrimination processing circuit, 9 is a vertical compression processing circuit, and 10 is a motion adaptive progressive scanning conversion processing circuit.

The features of the first embodiment are mainly as follows.
High-quality display video in either one-screen display or two-screen display, high-quality video with the roundness maintained at “1” on both the main screen and the sub-screen during two-screen display Another object of the present invention is to make the luminance level that changes in accordance with the vertical compression ratio when displaying two screens appropriate. For this reason, in the first embodiment, FIG.
An input signal discrimination processing circuit 8 is provided in parallel with the main / sub-screen signal processing circuits 2 and 3, and a vertical compression processing circuit 9 is provided at a stage subsequent to the sub-screen signal processing circuit 3, and a selector 4 and a D / A conversion circuit 5 And a motion-adaptive progressive scanning conversion processing circuit 10 is provided.

Hereinafter, each configuration will be described in detail.

The input circuit 1 is used to selectively input an NTSC video signal or a second generation EDTV video signal for terrestrial broadcasting.
NTS from HF / VHF tuner 11 and various storage media
Video input terminal 12 to which a C-system video signal is input
A high-vision compatible BS tuner 13 to which a MUSE video signal in satellite broadcasting is input; a MUSE input terminal 14 to which a MUSE video signal is input from various storage media; a MUSE-NTSC converter 15;
A MUSE-type video signal input from one of the S tuner 13 and the MUSE input terminal 14 is output to the MUSE-N
A changeover switch 16 for selectively inputting to the TSC converter 15; and a first switching circuit 17 for selectively inputting any one of the video signals input from the three input systems 11, 12, 16 to the main screen signal processing circuit 2. And a second switching circuit 18 for selectively inputting any one of the video signals input from the three input systems 11, 12, and 16 to the sub-screen signal processing circuit 3. That is, the input circuit 1 includes a main screen signal processing circuit 2 and a sub-screen signal processing circuit 3 in which one of a plurality of types of video signals is in a format unified to the NTSC scanning method in accordance with a user's selection operation. Is to be entered.

The main screen signal processing circuit 2 includes an A / D converter 21 for digitizing a video signal input via the first switching circuit 17 of the input circuit 1 and a digital signal for converting the video signal into a luminance signal. Y / C separation unit 22 for separating into chroma signals
A color demodulation unit 23 for demodulating the separated chroma signal into a color difference signal; a line memory 24 for accumulating a luminance signal and a color difference signal; a write / read control signal for the line memory 24; A synchronization processing unit 25 for generating a read control signal and a control signal relating to synchronization of the main screen video system.

The sub-screen signal processing circuit 3 includes an A / D converter 31 for digitizing a video signal input through the second switching circuit 18 of the input circuit 1 and a digital signal for converting the digitally converted video signal into a luminance signal. Y / C separation unit 32 for separating into chroma signals
A color demodulation processing unit 33 for demodulating the separated chroma signal into a color difference signal, a field memory 34 for storing a luminance signal and a color difference signal, and a synchronization processing unit 35 for generating a write control signal for the field memory 34. including.

The selector 4 controls the video signal read from the line memory 24 of the main screen signal processing circuit 2 and the sub screen signal processing based on the switching control signal generated by the synchronization processing section 25 of the main screen signal processing circuit 2. The video signal read from the field memory 34 of the circuit 3 is selectively output to a motion adaptive progressive scan conversion processing circuit 10 described below. That is, the selector 4 is controlled to output, for example, only the video signal from the main screen signal processing circuit 2 when displaying one screen, and the main screen signal processing circuit when displaying two screens. 2 and the video signal from the sub-screen signal processing circuit 3 are alternately output at a required period. The selector 4 corresponds to the synthesizing means of claims 5, 6, and 7.

The D / A conversion circuit 5 converts the video signal for one-screen display or the composite video signal for two-screen display given from the motion adaptive progressive scanning conversion processing circuit 10 into an analog signal and inputs it to the display 6. It is.

The display 6 has a screen having an aspect ratio of 9:16, and the entire screen is displayed in accordance with a video signal for one-screen display or a composite video signal for two-screen display provided from the D / A conversion circuit 5. One image is displayed in the area, or two different images are simultaneously displayed in the left and right areas of the screen.

The deflection processing circuit 7 generates a deflection pulse for scanning the display 6 and, based on a control signal given from the synchronization processing section 25 of the main screen signal processing circuit 2, generates a video signal for displaying one screen. And a composite video signal for two-screen display is compressed or expanded in the vertical direction.

The input signal discrimination processing circuit 8 recognizes the aspect ratio of each video signal input to the main screen signal processing circuit 2 and the sub-screen signal processing circuit 3, respectively. The vertical compression ratio of the main screen image and the horizontal / vertical compression ratio of the sub-screen image are determined so that the roundness of each image displayed on the screen side and the sub-screen side is “1”. Things. The above-described recognition is performed by using a control signal (such as an S1 signal or an S2 signal) sent together with the input signal or a signal for specifying selection of a main screen side image and a sub screen side image when a user displays two screens. Alternatively, it can be performed by checking the contents of the input signal. The vertical compression of the main screen video is controlled by the deflection processing circuit 7, and the horizontal compression of the sub screen video is controlled by the frequency ratio between the write clock and the read clock of the field memory 34. The vertical compression of the video is controlled by a vertical compression processing circuit 9.
In the above-described horizontal compression processing, it is also possible to perform a well-known filter processing of thinning out two pixels to one pixel by taking an average of two pixels adjacent in the horizontal direction. This input signal discrimination processing circuit 8 corresponds to the recognition means and the first and second management means.

The vertical compression processing circuit 9 converts the video signal read from the field memory 34 of the sub-screen signal processing circuit 3 in the vertical direction based on the vertical compression ratio of the sub-screen side video determined by the input signal discrimination processing circuit 8. The vertical compression process is performed by thinning out the data by filtering.

The motion adaptive progressive scan conversion processing circuit 10
A motion detection unit 102 for detecting whether an input video signal is a still image or a moving image by performing frame correlation of an input luminance signal using the frame memory 101;
03 and the line memory 104, the motion detection unit 102
A scanning line interpolating unit 105 that interpolates a scanning line adaptively to a motion based on the detection result of (1) and a field memory 106 only when displaying an input signal of the letter box system in the zoom mode in the case of one screen display. A vertical enlargement unit 107 for performing / 3 times vertical enlargement, two gain control units 108,
An amplitude control unit 111 that adjusts the luminance level during one-screen display in the zoom mode display or two-screen display using the adder 109 and the adder 110, and a control signal from the synchronization processing unit 25 of the main screen signal processing circuit 2. And a control signal generator 112 for providing each component with a control signal related to each operation. Note that the above-described amplitude control unit 111 corresponds to a brightness adjusting unit according to claim 7.

Next, the operation of the television receiver having the above configuration will be described.

One-screen display When the one-screen display and the type of display image are designated by the user, a corresponding video signal is selectively input from the input circuit 1 to the main-screen signal processing circuit 2.

In the main screen signal processing circuit 2, an input video signal is digitized by an A / D conversion circuit 21, and a horizontal synchronizing signal and a vertical synchronizing signal are separated from the video signal by a synchronizing processor 25, and the line memory 24, a write control signal, a read control signal, a switching control signal of the selector 4 and the like.

The write control signal generated by the synchronization processing section 25 causes the line memory 24 to be supplied to the Y / C separation section 22.
, And the color difference signal from the color demodulation processing unit 23, and reads the luminance signal and the color difference signal from the line memory 24 by the read control signal generated by the synchronization processing unit 25. At this time, the line memory reset cycle of the read control signal is set to be the same as the write control signal.

The read luminance signal and color difference signal are transferred to the motion-adaptive progressive scan conversion processing circuit 10 through the selector 4.
Give to. At this time, the selector 4 controls to output only the video signal output from the main screen signal processing circuit 2 at all times.

The motion adaptive progressive scan conversion processing circuit 10 detects whether the input video signal is a still image or a moving image. If the result of the detection is a still image, as shown in FIG.
While the scanning line one field before is used as the interpolation scanning line, in the case of a moving image, as shown in FIG. 3B, the interpolation scanning line is created from the upper and lower scanning lines of the video signal of the current field, so that the interlaced scanning can be performed. The data is converted into a sequential scan and is supplied to the D / A conversion circuit 5. However, when the display of the zoom mode is specified, the gain control unit performs the vertical enlargement processing by the vertical filter processing according to the vertical enlargement rate, and then
It is provided to the D / A conversion circuit 5.

The D / A conversion circuit 5 converts the data into an analog signal and outputs it to the display 6. At this time, the deflection processing circuit 7 generates a deflection pulse based on the horizontal / vertical synchronization signals given from the synchronization processing circuit 25 of the main screen signal processing circuit 2, and controls the vertical scanning period and the timing to display. Perform scanning processing.

As a display mode, when an input video signal is in the NTSC system having an aspect ratio of 3: 4,
Black band on left and right of aspect ratio 3: 4 video (no image area)
Normal mode to attach, full mode to stretch only the horizontal direction of the aspect ratio 3: 4 image to the full screen,
The user can select from a zoom mode that stretches the aspect ratio of the 4: 4 image equally in the vertical and horizontal directions, and a wide zoom mode (just mode) that displays the aspect ratio 3: 4 image on the entire screen with the aspect ratio of 9:16 without discomfort. The read timing of the line memory 24, the read timing,
By controlling the read clock, horizontal expansion / compression processing is performed. On the other hand, if the input video signal is in the letterbox format with an aspect ratio of 9:16, an image with a roundness of “1” is displayed on the entire screen of the display 6.

[0065] 2-screen display User by dual-screen display, the types and kinds of display images of the sub-screen side of a display image of the main screen side is designated, two video signals e.g. FIG answer from the input circuit 1 5
(A) and (b) are selectively input to the main screen signal processing circuit 2 and the sub-screen signal processing circuit 3 and also to the input signal discrimination processing circuit 8.

First, the input signal discrimination processing circuit 8 recognizes the aspect ratio of each video signal input to the main screen signal processing circuit 2 and the sub-screen signal processing circuit 3, respectively. The vertical compression ratio of the main screen image and the horizontal / vertical compression ratio of the sub-screen image are determined so that the roundness of each image displayed on the sub-screen becomes “1”. 7, a vertical compression ratio control signal for the main screen and a horizontal / vertical compression ratio control signal for the sub-screen to the vertical compression processing circuit 9. More specifically, for example, when the aspect ratio of the main screen image and the sub screen image are the same, both the main screen image and the sub screen image are vertically compressed by the deflection processing circuit 7. For example, as shown in FIG. 4A, when the aspect ratios of the main screen side video and the sub screen side video are both 3: 4, the vertical compression ratio by the deflection processing circuit 7 is set to 2/3.
As shown in (c), at 9:16, the vertical compression ratio by the deflection processing circuit 7 may be set to 1/2. However, when the aspect ratio of the main screen video is different from that of the sub-screen video, the main screen video is vertically compressed by the deflection processing circuit 7, and the sub-screen video is vertically compressed by the deflection processing circuit 7. Vertical compression or field memory 3
4 and the vertical compression processing circuit 9 perform aspect conversion by performing horizontal and vertical compression. For example, as shown in FIG. 4B, when the aspect ratio of the main screen image is 3: 4 and the aspect ratio of the sub screen image is 9:16, the vertical compression ratio of the main screen image is deflected. The vertical compression ratio of the sub-screen side image is set to 2/3 by the vertical compression processing circuit 9. Also, as shown in FIG. 4C, when the aspect ratio of the main screen video is 9:16 and the aspect ratio of the sub screen video is 3: 4, the vertical compression ratio of the main screen video is deflected. The vertical compression ratio of the sub-screen side image is set to 1/2 by the deflection processing circuit 7 as in the main screen side image, and the horizontal compression ratio of the sub-screen side image is set to the field memory 34.
To 3/4. In the case of FIG. 4C, the ratio of the horizontal compression of the sub-screen side video is １ ／ for the two-screen display.
Combined with compression, it becomes 3/8.

On the other hand, the following processing is performed in the main screen signal processing circuit 2 and the sub screen signal processing circuit 3, respectively.

That is, the processing up to the writing of the video signal input to the main screen signal processing circuit 2 to the line memory 24 is the same as that in the case of the above-described one screen display, and thus the description thereof will be omitted. In the sub-screen signal processing circuit 3, the input video signal is digitized by the A / D conversion circuit 31, the horizontal synchronizing signal and the vertical synchronizing signal are separated from the video signal by the synchronization processing unit 35, and the Generate a control signal. The luminance signal from the Y / C separation unit 32 and the color difference signal from the color demodulation processing unit 33 are written into the field memory 34 by the write control signal generated by the synchronization processing unit 35. The frequency of the write clock to the field memory 34 is set to be the same as the frequency of the write clock to the line memory 24.

Thereafter, horizontal compression processing and synthesis processing are performed by the line memory 24, the field memory 34, and the selector 4. First, the horizontal compression process
As a read control signal of the synchronization processing unit 35, the line memory 2
4 and the frequency of the read clock of the field memory 34 are set to twice the frequency of the read clock at the time of one screen display, so that the read is sequentially performed from the line memory 24 and the field memory 34 at the same timing. Further, in the synthesizing process, the selector 4 is switched and controlled by the switching control signal of the synchronization processing unit 35, and the video signal read from the line memory 24 is read in the first half of the horizontal scanning period, and the video signal read from the field memory 34 is read out from the vertical compression processing circuit. This is performed by arranging the video signal that has been subjected to the vertical compression processing in step 9 in the latter half of the horizontal scanning period to obtain a composite video signal as shown in FIG.

The video signal thus synthesized is supplied to the motion adaptive progressive scanning conversion processing circuit 10. The motion-adaptive progressive scan conversion processing circuit 10 interpolates the scanning lines according to the motion and supplies the luminance level of the interpolated scanning lines from the input signal determination processing circuit 8 in the same manner as in the case of the one-screen display. Adjusted based on the vertical compression ratio control signal of the screen image, FIG.
A signal as shown in (d) or (e) is output. Specifically, as shown in FIGS. 4A and 4B, when the aspect ratio of the main screen side video is 3: 4, the vertical compression ratio by the deflection processing circuit 7 is set to 2/3. The luminance level of the scanning line to be performed is set to 1/3. As a result, the average of the luminance levels of the current scanning line and the interpolation scanning line is 2/3, which matches the vertical compression ratio. Further, as shown in FIGS. 4C and 4D, when the aspect ratio of the image on the main screen side is 9:16, the vertical compression ratio by the deflection processing circuit 7 is set to 1/2. The luminance level of the line is set to 1/4. As a result, when the luminance levels of the current scanning line and the interpolation scanning line are averaged, they are １ ／, which is equal to the vertical compression ratio.

Thereafter, the data is output to the display 6 via the D / A conversion circuit 5. At this time, the deflection processing circuit 7 outputs the horizontal and horizontal signals supplied from the synchronization processing circuit 25 of the main screen signal processing circuit 2.
A display scan process is performed by generating a deflection pulse based on a vertical synchronizing signal and controlling the vertical scanning period and timing. The display signal is supplied from the input signal determination processing circuit 8 for the horizontal scanning period of each line. The vertical compression is performed based on the vertical compression ratio control signal.

FIGS. 4A to 4D show display examples of such a two-screen display operation. In each case, the roundness of the main screen side image and the sub screen side image is “1”.
, And the horizontal and vertical compression ratios of the sub-screen side video are adjusted based on the main screen side video.

In FIG. 4A, different types of NTSC video having an aspect ratio of 3: 4 are displayed on the left main screen and the right sub screen in the figure. In this case, the main screen side image and the sub screen side image have the same size, and black bands (imageless portions) having the same width are displayed vertically.

In FIG. 4B, NTSC video having an aspect ratio of 3: 4 is displayed on the main screen, and NTS video is displayed on the sub-screen.
C-type letterbox images are displayed. In this case, the main screen side image and the sub screen side image have different sizes in the vertical direction, and black bands (imageless portions) having different vertical widths are displayed.

In FIG. 4C, an NTSC video with an aspect ratio of 9:16 is displayed on the main screen, and an NTSC video with an aspect ratio of 3: 4 is displayed on the sub-screen. In this case, the main screen side video and the sub screen side video have different sizes in the left and right direction, and black bands (no image portions) of the same width are displayed up and down, and black bands (no Image section) is displayed.

In FIG. 4D, different types of 9:16 aspect ratio NTSC video are displayed on the main screen side and the sub screen side. In this case, the main screen side image and the sub screen side image have the same size, and black bands (imageless portions) having the same width are displayed vertically.

In the first embodiment described above, the interlaced scan video signal input by the motion adaptive progressive scan conversion processing circuit 10 is converted into a progressive scan video signal using the result of motion detection. , The same scanning line 2 of the conventional example
The jaggedness of the display image such as the scan conversion process by the stride writing can be eliminated, and the visibility can be improved, for example, the display image can be made high quality. In addition to this,
In the case of displaying on the screen, an image with the roundness maintained at “1” is displayed on the main and sub-screens, so that the image can be displayed in a faithful state without distortion. In addition, in a two-screen display that requires vertical compression of video, by adjusting the luminance level to be low in accordance with the vertical compression ratio of the main screen video, the overlap of light on the upper and lower scanning lines is reduced to sharpen the image. Since the degree is improved, the visibility can be improved even though the screen image is reduced. In particular, if the amplitude control unit 111 provided in the motion adaptive progressive scan conversion circuit 10 is used in adjusting the luminance level according to the vertical compression ratio as in the first embodiment, unnecessary circuits are wasted. It is not necessary to increase it, and it can contribute to cost reduction. Further, when the brightness level is adjusted in accordance with the vertical compression ratio, if only the brightness level of the interpolation line is adjusted as in the first embodiment, the following advantages can be obtained. That is, in contrast to the case where the brightness levels of both the current line and the interpolation line are adjusted, in the first embodiment, only the brightness level of the interpolation line that causes image quality degradation by performing the vertical filter processing at the time of moving image is reduced to reduce the brightness level of the entire screen. By adjusting, a high-quality image can be realized. Further, compared to the case where the number of scanning lines is reduced to lower the luminance level, the first embodiment provides higher image quality.

Note that the present invention is not limited to the above-described embodiment, and various applications and modifications are conceivable.

(1) In the first embodiment, only the luminance level of the interpolation line created by the scanning line interpolation unit 105 is adjusted by the amplitude control unit 111 of the motion adaptive sequential scan conversion processing circuit 10 in accordance with the vertical compression ratio. However, both the luminance level of the interpolation line and the luminance level of the current line input to the scanning line interpolation unit 105 may be adjusted according to the vertical compression ratio.

(2) FIG. 6 shows a second embodiment of the present invention. That is, in the first embodiment, a wide aspect television receiver is taken as an example, whereas in the second embodiment, M is different from that of FIG.
By adding the USE signal processing circuit 11 and the selector 12, a high vision receiver is obtained. In this case, the HDTV system video can be displayed on one screen, and the function becomes more versatile.

(3) FIG. 7 shows a third embodiment of the present invention. That is, in the first embodiment, the display form of the main and sub-screens in the two-screen display can be made to correspond to a wide variety. On the other hand, in the third embodiment, FIG. By omitting the input signal determination processing section 8 and the vertical compression processing section 9, for example, FIG.
In this case, only the display form shown in FIG. In short, the third embodiment is obtained by simplifying the configuration of the first embodiment. Further, in the third embodiment, the MUSE signal processing circuit 11 and the selector 12 can be added as in the second embodiment.

(4) FIG. 8 shows a fourth embodiment of the present invention. That is, in the first embodiment, the vertical compression of the main screen side video is performed by the deflection processing circuit 7 and the vertical compression of the sub screen side video is performed by the vertical compression processing circuit 9. 4, the line memory 24 of the main screen signal processing circuit 2 in FIG.
1 and the same circuit 24A as the vertical compression processing circuit 9 in FIG. 1 is provided at the subsequent stage of the main screen signal processing circuit 2 so that the vertical compression of the main screen side video can be performed on the sub-screen side video. The vertical compression processing circuit 9A can also perform the vertical compression in the same manner as the vertical compression. Further, in the fourth embodiment, the MUSE signal processing circuit 11 and the selector 12 can be added as in the second embodiment.

[0083]

According to the first to fifth aspects of the present invention, it is possible to eliminate the jaggedness of the displayed image as in the conventional scan conversion processing by writing the same scanning line twice, and to improve the quality of the displayed image. Visibility can be improved.

In particular, according to the second, third and sixth aspects of the present invention, when two screens are displayed, an image in which the roundness is maintained at "1" is displayed on the main and sub screens.
Images can be displayed faithfully without distortion.

According to the fourth and seventh aspects of the present invention, in a two-screen display requiring vertical compression of an image,
That is, by adjusting the luminance level to be low in accordance with the change in the scanning density due to the vertical compression of the deflection process, the brightness of the display screen can be kept constant despite the screen image becoming smaller.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a television receiver according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a motion adaptive progressive scan conversion circuit of FIG. 1;

FIG. 3 is an explanatory diagram schematically showing an interpolation process by the motion-adaptive progressive scanning conversion circuit of FIG. 1;

FIG. 4 is an explanatory view showing various two-screen display examples.

FIG. 5 is a waveform chart used to explain the operation when displaying two screens.

FIG. 6 is a block diagram illustrating a schematic configuration of a television receiver according to a second embodiment of the present invention.

FIG. 7 is a block diagram illustrating a schematic configuration of a television receiver according to a third embodiment of the present invention.

FIG. 8 is a block diagram illustrating a schematic configuration of a television receiver according to a fourth embodiment of the present invention.

FIG. 9 is a block diagram showing a schematic configuration of a conventional television receiver.

FIG. 10 is an explanatory diagram schematically showing a scan conversion process.

FIG. 11 is a waveform diagram used for describing the operation when displaying two screens.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input circuit 2 Main screen signal processing circuit 3 Sub-screen signal processing circuit 4 Selector 5 D / A conversion circuit 6 Display 7 Deflection processing circuit 8 Input signal discrimination processing circuit 9 Vertical compression processing circuit 10 Motion adaptive progressive scan conversion processing circuit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Matsuoka 1006 Kazuma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. 72) Inventor Naoji Okumura 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. Naoki Shintani 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (7)

[Claims] 1. A television receiver for simultaneously displaying two different images in left and right regions of a display screen having a wide aspect ratio, wherein the display device uses two different interlaced scanning video signals input thereto. A composite video signal for two-screen display for simultaneously displaying different images on the left and right regions of the screen is created, and the composite video signal for two-screen display is subjected to scanning line interpolation according to motion, thereby forming a sequential scan signal and A television receiver. 2. A television receiver for simultaneously displaying two different images in left and right regions of a display screen having a wide aspect ratio, the television receiver recognizing each aspect ratio of two different interlaced video signals input. And determining a vertical compression ratio for setting the roundness of each video signal to be displayed on two screens to “1”, and using the two different interlaced video signals to the left and right regions of the display screen. Creating a composite video signal for two-screen display for simultaneously displaying different videos, and performing a scanning line interpolation on the composite video signal for the two-screen display to make a sequential scan signal by interpolating the motion; A deflection process for a display device based on the determined vertical compression ratio. 3. A television receiver for simultaneously displaying two different images in left and right regions of a display screen having a wide aspect ratio. The television receiver recognizes each aspect ratio of two different interlaced video signals input. When the two video signals have different aspect ratios, the vertical compression ratio for setting the roundness of the video signal for the main screen displayed on the main screen to "1" is determined, and the video signal is displayed on the sub-screen. A horizontal / vertical compression ratio for setting the roundness of the sub-screen video signal to “1” is determined. The video signal for the main screen is not subjected to vertical compression signal processing, and the sub-screen video signal is not processed. Two video signals for simultaneously displaying different video in the left and right regions of the display screen by using the two different video signals after performing signal processing on the video signal of the horizontal and vertical compression ratios determined above. For display A video signal is created, and a composite video signal for two-screen display is converted into a sequential scanning signal by interpolating a scanning line according to motion, and the determination is made as to the existence period of the video signal for the main screen in the composite video signal. A television receiver for performing a deflection process on a display device based on the vertical compression ratio obtained. 4. A television receiver for simultaneously displaying two different images in left and right regions of a display screen having a wide aspect ratio, wherein the television receiver recognizes each aspect ratio of two different interlaced video signals input. When the two video signals have different aspect ratios, the vertical compression ratio for setting the roundness of the video signal for the main screen displayed on the main screen to "1" is determined, and the video signal is displayed on the sub-screen. A horizontal / vertical compression ratio for setting the roundness of the sub-screen video signal to “1” is determined. The video signal for the main screen is not subjected to vertical compression signal processing, and the sub-screen video signal is not processed. Two video signals for simultaneously displaying different video in the left and right regions of the display screen by using the two different video signals after performing signal processing on the video signal of the horizontal and vertical compression ratios determined above. For display A video signal is created, and a synthesized video signal for two-screen display is interpolated to a scanning line by adapting to motion to form a sequential scanning signal, and a luminance level of the interpolated scanning line is set to a video signal for the main screen. And performing a deflection process on a display based on the determined vertical compression ratio for the existence period of the video signal for the main screen in the composite video signal. Television receiver. 5. A television receiver for simultaneously displaying two different images in left and right regions of a display screen having a wide aspect ratio, digitizing and accumulating an input required type of interlaced image signal, A main screen signal processing means for compressing the image in the horizontal direction to １ ／ and outputting the image data; Screen signal processing means, and by sequentially combining each line of two different interlaced video signals output from each processing means in the first half and the second half of the horizontal scanning period, a two-screen display A synthesizing means for obtaining a synthesized video signal; and a motion-adaptive progressive scan conversion means for converting a synthesized video signal for two-screen display into a progressive scan signal by performing scanning line interpolation in accordance with motion. Television receiver, wherein the door. 6. A television receiver for simultaneously displaying two different images in left and right regions of a display screen having a wide aspect ratio, digitizing and accumulating an input required type of interlaced image signal, A main screen signal processing means for compressing the image in the horizontal direction to １ ／ and outputting the image data; Screen signal processing means, recognition means for recognizing each aspect ratio of the video signal input to the main screen signal processing means and the video signal input to the sub-screen signal processing means, based on the recognition result of the recognition means, First management means for determining a vertical compression rate for setting the roundness of a video signal displayed on the main screen to "1" and outputting a vertical compression rate control signal to the following deflecting means; As a result, when the two video signals have different aspect ratios, the horizontal compression ratio and the vertical compression ratio for setting the roundness of the video signal displayed on the sub-screen to "1" are determined, and the horizontal compression ratio is determined. A second management means for outputting a control signal to the sub-screen signal processing means, a vertical compression rate control signal to the following vertical compression processing means, and a vertical compression rate control signal supplied from the second management means. Vertical compression processing means for vertically compressing a video signal output from the screen signal processing means; and a video signal output from the main screen signal processing means and a video signal output from the vertical compression processing means in the first half of a horizontal scanning period. A combining means for obtaining a combined video signal for two-screen display by sequentially combining into a form arranged in the second half and a latter half; A motion-adaptive progressive-scan conversion means as a next scanning signal; and a composite video signal for two-screen display, which is a progressive scanning signal, converted into an analog signal. A deflecting unit that performs a deflecting process based on the vertical compression ratio control signal given from the determining unit. 7. A television receiver for simultaneously displaying two different images in left and right regions of a display screen having a wide aspect ratio, digitizing and accumulating an input required type of interlaced image signal, A main screen signal processing means for compressing the image in the horizontal direction to １ ／ and outputting the image data; Screen signal processing means, recognition means for recognizing each aspect ratio of the video signal input to the main screen signal processing means and the video signal input to the sub-screen signal processing means, based on the recognition result of the recognition means, First management means for determining a vertical compression rate for setting the roundness of a video signal displayed on the main screen to "1" and outputting a vertical compression rate control signal to the following deflecting means; As a result, when the two video signals have different aspect ratios, the horizontal compression ratio and the vertical compression ratio for setting the roundness of the video signal displayed on the sub-screen to "1" are determined, and the horizontal compression ratio is determined. A second management means for outputting a control signal to the sub-screen signal processing means, a vertical compression rate control signal to the following vertical compression processing means, and a vertical compression rate control signal supplied from the second management means. Vertical compression processing means for vertically compressing a video signal output from the screen signal processing means; and a video signal output from the main screen signal processing means and a video signal output from the vertical compression processing means in the first half of a horizontal scanning period. A combining means for obtaining a combined video signal for two-screen display by sequentially combining into a form arranged in the second half and a latter half; Motion adaptive progressive scan conversion means for the next scan signal; and brightness adjustment for reducing the luminance level of the scanning line interpolated by the motion adaptive progressive scan conversion means in accordance with the ratio of the vertical compression ratio determined by the first management means. Means for converting a composite video signal for two-screen display, which has been converted into a progressive scanning signal, into an analog signal, and in the composite video signal, a signal in the first half of the horizontal scanning period of each scanning line is converted into a vertical compression ratio control signal given from the determination means And a deflecting unit for deflecting based on the television receiver.