JP2642601B2 - Television receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color television receiver, and more particularly to a television receiver having a display having a display screen having an aspect ratio (aspect ratio) different from that of a standard video signal (4: 3). Things.

[0002]

2. Description of the Related Art With the recent widespread use of VTRs (video tape recorders) and VDPs (video disc players), many video softwares (hereinafter referred to as movie softwares) recording movies have been marketed. In these movie softwares, the proportion of video images having a horizontally long aspect ratio in order to convey all video information and inserting non-image portions (portions without video information) above and below the display screen is large. When such movie software is displayed on a horizontally long display having a display screen aspect ratio different from that of a conventional display (for example, 16: 9), a powerful video is obtained by displaying the video period on the entire display screen. Methods are known.

For example, in a television receiver described in Japanese Patent Application Laid-Open No. 63-198487, whether or not a video signal is movie software is detected based on the length of a non-image portion of an input video signal, and the video signal is movie software. In such a case, the amplitude in the horizontal and vertical directions (the length in the horizontal and vertical directions on the display screen) is enlarged according to the length of the non-image portion, and displayed on a horizontally long display. Further, when the widths of the upper and lower non-image portions on the display screen are different, the vertical phase of the image is changed in accordance with the difference, so that the display is balanced in the vertical direction.

[0004]

However, in the above-mentioned conventional example, no consideration is given to the subtitles of the movie software, and there are the following problems. Many commercially available movie software have recorded Western movies, with Japanese subtitles added. The display position of the subtitle differs depending on the software, and there are a display position in the video period and a display position in the non-picture portion at the lower portion of the display screen as shown in FIG.

[0005] When such movie software having subtitles in non-picture areas is displayed on a display having an aspect ratio of 16: 9 in the above-mentioned conventional example, if the horizontal amplitude is taken to fill the display screen, the vertical amplitude is obtained. Is magnified 4/3 times. At this time, since the subtitles are in the non-image portion, the subtitles come out of the display screen due to the expansion of the amplitude in the vertical direction.
As shown in the figure, the screen is missing subtitles.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a powerful display without missing subtitles even for movie software whose subtitles are in a blanking period (no image portion). It is an object of the present invention to provide a television receiver capable of performing the above.

[0007]

In order to achieve the above-mentioned object, according to the present invention, a horizontally long display, a vertically enlarging means, and a reducing display means are provided.

[0008]

In the case where the input video signal is movie software, the video signal is vertically expanded by the expansion means, and a horizontal scanning period in which a subtitle exists in the video signal is provided.
The space is displayed by being reduced in the vertical direction by the reduced display means . Thus, even when movie software having subtitles in the non-picture portion is input, a powerful display can be performed without missing video or subtitles.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention. 1, reference numeral 101 denotes a video signal input terminal; 102, an analog / digital (hereinafter abbreviated as A / D) converter;
Is a sync separation circuit, 104 is a video signal processing circuit, 10
5 is a video period detection circuit, 106 is a subtitle period detection circuit, 107 is a clock generation circuit, 108 is a time axis compression circuit, 109 is a display method control circuit, 110 is a subtitle movement circuit, and 111 is a vertical position. An adjusting circuit; 112, a digital / analog (hereinafter abbreviated as D / A) converter;
Reference numeral 13 denotes a display having a display screen with an aspect ratio of 16: 9, and 114 denotes a vertical amplitude expansion circuit.

The video signal input from the input terminal 101 is
The digital signal is converted by the A / D converter 102 and the synchronization signal is separated by the synchronization separation circuit 103. The video signal converted into a digital signal is supplied to a video signal processing circuit 104, a video period detection circuit 105, and a subtitle period detection circuit 106. Further, the separated synchronization signal is supplied to a clock generation circuit 107, a display method control circuit 109, a caption moving circuit 110, a vertical position adjustment circuit 111.
And to the display 113.

The video signal processing circuit 104 performs basic processing on the video signal, for example, processing such as luminance signal / color signal separation, noise reduction, contour enhancement, etc., and outputs the result to the time axis compression circuit 108.

In the video period detection circuit 105, for example, an average level in one horizontal line of each horizontal line of the video signal is obtained, and a horizontal line larger than a preset level as compared with a preset level is a video period. Thus, the length of the video period is detected, and the detection result is output to the subtitle period detection circuit 106 and the display method control circuit 109.

The subtitle period detecting circuit 106 detects the length of the subtitle period by judging that a horizontal line having a level higher than a preset level other than the detected video period is the subtitle period, for example, and detects the length of the subtitle period. Is output to the display method control circuit 109.

The display method control circuit 109 first determines whether the image is a normal image (image aspect ratio 4: 3) or movie software based on the length of the input video period and the length of the subtitle period. If it is determined to be soft,
It is determined whether or not the video and subtitles fit within the display screen when the amplitude in the vertical direction is expanded together.

Here, it is determined whether the input image period is longer than the set value by comparing the length of the input video period with a preset value. It is done by saying that there is. In addition, when the amplitude in the vertical direction is enlarged, it is determined whether or not it fits within the display screen. It is done by saying that it fits in, and does not fit if it is large.

Thereafter, based on the information determined in this way, the display method control circuit 109 outputs the clock generation circuit 10.
7. Generate and output signals for controlling the subtitle moving circuit 110, the vertical position adjusting circuit 111, and the vertical amplitude expanding circuit 114.

Hereinafter, a case where it is determined that the image is a normal image, a case where it is movie software and it is determined that it fits in the display screen when the vertical amplitude is enlarged, and a case where it is movie software and the image is displayed on the display screen when the vertical amplitude is enlarged. Each circuit operation when it is determined that it does not fit into the above will be described.

First, when it is determined that the image is a normal image, the time axis compression circuit 108 compresses the time axis of the video signal to 3/4 times. The time axis compression circuit 108 is configured using, for example, a line memory, and sets the read clock to a frequency that is 4/3 times the write clock, thereby compressing the video signal and outputting the compressed video signal to the subtitle moving circuit 110. Also, at this time, by controlling the read timing to the line memory, the video data is
The video signal is read such that the blanking level data is at a predetermined position in the horizontal blanking period.

In the clock generation circuit 107, a clock for synchronizing the video signal and a stable read clock having a frequency 4/3 times as high as the clock and generated by a crystal oscillator or the like are used as clocks for compression. ,
Each is generated. A signal for controlling the write timing and the read timing is transmitted to the display method control circuit 1.
At 09, it is generated by counting the write clock and the read clock.

Thereafter, the subtitle moving circuit 110 and the vertical position adjusting circuit 111 pass the compressed video signal without performing any operation, convert the compressed video signal into an analog signal in the D / A converter 112, and display the analog signal on the display 113. The vertical amplitude expansion circuit 114 controls the display 113 to perform normal vertical deflection. The horizontal driving pulse for the display 113 is generated by dividing the read clock in the display method control circuit 109.

Next, if it is determined that the movie software fits within the display screen when the amplitude in the vertical direction is increased, the read clock generated by the clock generation circuit 107 is changed to a stable clock having the same frequency as the write clock. And the time axis compression circuit 108 does not compress the time axis of the video signal.

Thereafter, the subtitle moving circuit 110 passes the image without performing anything, and the vertical position adjusting circuit 111 changes the vertical position of the image and the subtitle on the display screen. The vertical position adjustment circuit 111 is configured using, for example, a field memory, and changes the read timing with respect to the write timing in units of horizontal lines, so that the video and subtitles are vertically balanced in the display screen when the amplitude in the vertical direction is increased. Reading is performed so that the image can be displayed well.

The video signal whose vertical position has been adjusted is
Converted into an analog signal by the D / A converter 112,
It is displayed on the display 113. At this time, by controlling the display 113, the vertical amplitude expansion circuit 114 changes the amplitude of the vertical deflection current to increase the vertical amplitude of video and subtitles on the display screen by 4/3.

Finally, when it is determined that the movie software does not fit within the display screen when the amplitude is enlarged in the vertical direction, the time axis compression circuit 108 compresses the time axis of the video signal in the same manner as described above. Absent. And the subtitle moving circuit 1
At 10, the subtitles on the display screen are moved upward.

FIG. 2 is a block diagram showing a specific configuration of the caption moving circuit in FIG. In the figure, reference numeral 901 denotes a video signal input terminal; 902, a field memory;
Denotes a write control signal input terminal, 904 denotes a synchronization signal input terminal, and 905 denotes a video signal output terminal.

First, the input video signal is stored in the field memory 902. At this time, the display method control circuit 1
The writing control signal from 09 prohibits writing only during the deletion period (the period between the video of the input image and the caption) shown in FIG. Thereafter, the subtitles are moved upward by sequentially reading out the stored video signals with reference to the synchronization signal from the synchronization separation circuit 103.

The vertical position adjustment circuit 111 adjusts the vertical position of the video signal to which the subtitle has been moved so that the video and the subtitle can be displayed in a well-balanced manner when the amplitude is increased in the vertical direction. After that, the signal is converted into an analog signal by the D / A converter 112 and the vertical amplitude expansion circuit 1
The display 14 controls the display 113 so that the amplitude in the vertical direction is multiplied by 4/3 and displayed. The display image at this time is shown in FIG.

In this embodiment, the time axis compression circuit 108, the caption moving circuit 110, and the vertical position adjustment circuit 111 are separately configured using a line memory and a field memory, respectively. It is also possible to have the function of.

As described above, according to the present embodiment, even for movie software having subtitles during the blanking period, a powerful display can be performed without missing subtitles when the amplitude in the vertical direction is increased. Further, since the reading of the video signal from the time axis compression circuit 108 is performed by a stable clock, there is also a time axis correction effect of absorbing the jitter of the input video signal.
Further, at the time of time axis compression, the video signal is read out from the time axis compression circuit 108 separately for video data and blanking level data. Therefore, even when the video is displayed at the center of the horizontally long display 113, level reproduction is performed. Can be performed correctly.

FIG. 4 is a block diagram showing another embodiment of the present invention. In the figure, reference numeral 401 denotes a caption adding circuit. In addition, components having the same reference numerals as those in FIG. 1 have the same configuration and function.

Also in this embodiment, the display method control circuit 109 determines whether the image is a normal image or movie software, and, in the case of movie software, whether or not the image fits in the display screen when the amplitude is enlarged in the vertical direction. The determination is performed in the same manner as in the embodiment of FIG. 1 and the display method is switched by controlling each circuit. Less than,
The circuit operation in each case will be described.

First, when it is determined that the image is a normal image, the time axis of the video signal is compressed to 3/4 times by the time axis compression circuit 108 in the same manner as in the embodiment of FIG. Thereafter, the signal is passed through the vertical position adjustment circuit 111 and the subtitle addition circuit 401 without performing any operation, and the D / A converter 112
To convert the signal into an analog signal and display it on the display 113. The vertical amplitude expansion circuit 114 controls the display 113 to perform normal vertical deflection. The horizontal driving pulse of the display 113 is supplied to the display method control circuit 109.
, The read clock input from the clock generation circuit 107 is frequency-divided and generated.

Next, when it is determined that the movie software fits within the display screen when the amplitude is enlarged in the vertical direction, the time axis compression circuit 108 is executed in the same manner as in the embodiment of FIG.
, The compression of the time axis of the video signal is stopped. And
The vertical position adjustment circuit 111 adjusts and outputs the vertical position so that the image and the caption can be displayed in a well-balanced manner on the display screen when the amplitude in the vertical direction is enlarged. After that, the caption adding circuit 401 allows the subtitles to pass through without doing anything,
The signal is converted into an analog signal by the A converter 112 and displayed on the display 113. At this time, the vertical amplitude enlargement circuit 114 controls the display 113 to change the amplitude of the vertical deflection current to increase the vertical amplitude of video and subtitles by 4/3.

Finally, when it is determined that the video software does not fit within the display screen when the amplitude is enlarged in the vertical direction, the time axis compression circuit 108 compresses the time axis of the video signal in the same manner as described above. Absent. Then, the vertical position adjustment circuit 111 adjusts the position in the vertical direction so that the image can be displayed near the center of the display screen in the vertical direction when the amplitude in the vertical direction is enlarged, and outputs the image.

Then, in the caption adding circuit 401, the caption on the display screen is deleted once and then newly added.

FIG. 5 is a block diagram showing a specific configuration of the caption adding circuit in FIG. In the figure, 1001 is a video signal input terminal, 1002 is a gate circuit, 1003
Denotes a selection circuit, 1004 denotes a memory, 1005 denotes a timing generation circuit, 1006 denotes a control signal input terminal, and 10 denotes a control signal input terminal.
Reference numeral 07 denotes a synchronization signal input terminal, and reference numeral 1008 denotes a video signal output terminal.

The gate circuit 1002 replaces the subtitle period of the input video signal with black information in accordance with the control signal indicating the subtitle period from the display method control circuit 109, erases the original subtitles, and selects the selection circuit 1003. Output to The memory 1004 stores only subtitle information in the video signal (for example, the most significant bit MSB of the video data in the subtitle period) according to the control signal indicating the subtitle period.

After that, in the timing generation circuit 1005, the subtitle information is read out at a predetermined position in the display screen by the readout timing signal generated based on the synchronization signal from the synchronization separation circuit 103, and the selection circuit 1003 Control. The selection circuit 1003 normally selects the video signal according to the read subtitle information,
The subtitle is added to the subtitle by selecting a fixed value corresponding to white.

The video signal to which subtitles have been added in this manner is converted into an analog signal by the D / A converter 112 and displayed on the display 113. At this time, the vertical amplitude expansion circuit 114 controls the display 113 to display the video and the caption in the vertical direction at 4/3 times the amplitude. The display image at this time is shown in FIG.

In this embodiment, the subtitle adding circuit 401 is constituted by a digital circuit. However, subtitle adding processing may be performed by generally known techniques such as superimposition and on-screen display. As described above, according to this embodiment, the same effect as that of the embodiment of FIG. 1 can be obtained.

FIG. 7 is a block diagram showing another embodiment of the present invention. In the figure, reference numeral 501 denotes a caption reduction circuit. In addition, components having the same reference numerals as those in FIG. 1 have the same configuration and function.

Also in the present embodiment, the display method control circuit 109 determines whether the image is a normal image or movie software, and in the case of movie software, whether or not the image fits in the display screen when the vertical amplitude is enlarged. Judgment is made in the same manner as in the first embodiment, and each circuit is controlled to switch the display method. Hereinafter, the circuit operation in each case will be described.

First, when it is determined that the image is a normal image, the time axis compression circuit 1 is used in the same manner as in the embodiment of FIG.
At 08, the time axis of the video signal is compressed to 3/4 times.
After that, the caption reduction circuit 501 and the vertical position adjustment circuit 11
In 1, the signal is passed without performing anything, converted into an analog signal by the D / A converter 112, and displayed on the display 113. The vertical amplitude expansion circuit 114 controls the display 113 to perform normal vertical deflection. The horizontal driving pulse of the display 113 is generated by the display method control circuit 109 by dividing the frequency of the read clock input from the clock generation circuit 107.

Next, when it is determined that the movie software fits within the display screen when the amplitude is enlarged in the vertical direction, the time axis compression circuit 108 is executed in the same manner as in the embodiment of FIG.
, The compression of the time axis of the video signal is stopped. And
The caption reduction circuit 501 does nothing, and the vertical position adjustment circuit 111 adjusts and outputs the vertical position so that the video and the subtitle can be displayed on the display screen in a well-balanced manner when the amplitude is increased in the vertical direction. . After that, the signal is converted into an analog signal by the D / A converter 112 and the display 11
3 is displayed. At this time, the vertical amplitude expansion circuit 114 controls the display 113 to change the amplitude of the vertical deflection current, thereby increasing the vertical amplitude of the video and subtitles by 4 /.
Multiply by three.

Finally, if it is determined that the movie software does not fit on the display screen when the amplitude is enlarged in the vertical direction, the time axis compression circuit 108 compresses the time axis of the video signal in the same manner as described above. Absent. And the subtitle reduction circuit 5
At 01, only the subtitles are reduced.

FIG. 8 is a block diagram showing a specific configuration of the caption reduction circuit in FIG. In the figure, 1101 is a video signal input terminal, 1102 is a gate circuit, 1103
Denotes a selection circuit, 1104 denotes a memory, 1105 denotes a thinning signal generation circuit, 1106 denotes a timing generation circuit, and 11 denotes a timing generation circuit.
Reference numeral 07 denotes a control signal input terminal, 1108 denotes a synchronization signal input terminal, and 1109 denotes a video signal output terminal.

The gate circuit 1102 replaces the subtitle period of the input video signal with black information in accordance with the control signal indicating the subtitle period from the display method control circuit 109, erases the original subtitles, and selects the selection circuit 1103. Output to The memory 1104 stores only the subtitle portion in the video signal in the horizontal and vertical directions in accordance with the thinning signal generated by the thinning signal generation circuit 1105 and stores it. After that, the thinned subtitle portion is read out by the readout timing signal generated based on the synchronization signal from the synchronization separation circuit 103 in the timing generation circuit 1106, and is output to the selection circuit 1103. The selection circuit 1103 usually selects the video signal in accordance with the read timing, and selects only the output of the memory 1104 during the subtitle period to reduce only the subtitle.

The video signal whose caption has been reduced in this manner is processed by the vertical position adjusting circuit 111 so that the video and the reduced caption can be displayed in a vertical balance on the display screen when the amplitude is increased in the vertical direction. Is adjusted,
After that, the signal is converted into an analog signal by the D / A converter 112 and displayed on the display 113. At this time, the vertical amplitude expansion circuit 114 controls the display 113 to reduce the vertical amplitude of the video and subtitles to 4/3.
Display by doubling. The display image at this time is shown in FIG. As described above, according to this embodiment, the same effect as that of the embodiment of FIG. 1 can be obtained.

FIG. 10 is a block diagram showing still another embodiment of the present invention. This embodiment has a function similar to that of the embodiment of FIG. 1, and changes the phase of the vertical drive pulse of the display 113 in adjusting the vertical position of the image and the subtitle. .

In the figure, reference numeral 801 denotes a vertical position adjustment circuit, and those having the same reference numerals as those in FIG. 1 have the same structure and function. In the embodiment shown in FIG.
Thus, the video signal is stored in the field memory, and the readout timing is changed to adjust the vertical position of the video and subtitles on the display screen.

In the present embodiment, when the display method control circuit 109 determines that the movie software is used, the display control circuit 109 controls the vertical position adjustment circuit 801 to change the phase of the vertical drive pulse supplied to the display 113. Video and subtitles are displayed on the display screen with good vertical balance. Other circuit operations are the same as in the embodiment of FIG. As described above, according to this embodiment, the same effect as that of the embodiment of FIG. 1 can be obtained.

Also, as in this embodiment, the display 11
The method of adjusting the vertical position of the video and subtitles on the display screen by changing the phase of the vertical drive pulse 3 can also be applied to the embodiment of FIG.

Further, in the above four embodiments, the vertical amplitude expansion circuit 114 changes the vertical deflection current of the display 113 to expand the vertical amplitude of the video and subtitles in the vertical direction. However, a memory or the like is used. The configuration may be such that the amplitude in the vertical direction is expanded by digital processing. This method is the same as the vertical position adjustment circuit 111 described above.
As in the case of
Readout timing is compared to horizontal line
And read the same line information multiple times, for example.
This expands the amplitude in the vertical direction.

[0054]

As described above, according to the present invention, it is possible to process subtitles even for movie software having subtitles in a non-picture portion so that the subtitles fit within the display screen. Thus, a powerful display can be performed without missing images and subtitles.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a block diagram showing a specific configuration of a caption moving circuit in FIG. 1;

3A is an explanatory diagram illustrating an input image input as a video signal in FIG. 1, and FIG. 3B is an explanatory diagram illustrating a display image displayed on a display screen of a display in FIG.

FIG. 4 is a block diagram showing another embodiment of the present invention.

FIG. 5 is a block diagram showing a specific configuration of a caption adding circuit in FIG. 4;

FIG. 6 is an explanatory diagram showing a display image displayed on a display screen of a display in FIG. 4;

FIG. 7 is a block diagram showing another embodiment of the present invention.

8 is a block diagram illustrating a specific configuration of a caption reduction circuit in FIG. 7;

9 is an explanatory diagram showing a display image displayed on a display screen of a display in FIG. 7;

FIG. 10 is a block diagram showing still another embodiment of the present invention.

11A is an explanatory diagram illustrating an input image input as a video signal in a conventional example, and FIG. 11B is an explanatory diagram illustrating a display image displayed on a display screen of a display in a conventional example.

[Explanation of symbols]

105: video period detection circuit, 106: subtitle period detection circuit, 107: clock generation circuit, 108: time axis compression circuit, 109: display method control circuit, 110: subtitle movement circuit, 111: vertical position adjustment circuit, 113: display 114, a vertical amplitude expansion circuit, 401, a caption addition circuit, 501, a caption reduction circuit, 801, a vertical position adjustment circuit.

Claims (6)

(57) [Claims] 1. A television receiver having a horizontally long display in which an aspect ratio of a display screen is different from an aspect ratio of a standard video signal, wherein a video signal to be displayed on the display is arranged in a vertical direction of the screen.
Reduction means (501) capable of reducing
Vertical enlargement to enlarge the reduction means output in the screen vertical direction
Large processing means (114), and
For the horizontal scanning period in which subtitles exist,
Means to compress the video signal in the vertical direction of the screen.
Television receiver, characterized in that it made it possible to Rukoto. 2. The television receiver according to claim 1, further comprising a vertical position adjusting means for adjusting a vertical position of a video signal displayed on said display. 3. The television receiver according to claim 1, wherein the vertical enlargement unit enlarges a video signal displayed on the display in a vertical direction by increasing an amplitude of a vertical deflection current applied to the display. A television receiver characterized by the above-mentioned. 4. The television receiver according to claim 1, wherein said vertical enlargement processing means is constituted by using a memory, and a cycle of a timing of writing an input signal to the memory.
If the period of signal read timing from memory is different
A television receiver characterized by comprising means for enlarging in the vertical direction . 5. The television receiver according to claim 2, wherein the vertical position adjusting means changes a vertical position of a video signal displayed on the display according to a phase of a vertical drive pulse applied to the display. Television receiver. 6. The television receiver according to claim 2, wherein the vertical position adjusting means is configured using a memory, and changes a vertical position of a video signal displayed on the display according to a phase difference between writing and reading. A television receiver.