JPH099172A - Video signal processing unit - Google Patents

Abstract

PURPOSE: To provide the video signal processing unit in which caption information is optionally displayed together with a video image onto a wide screen depending on the selecting operation of the user. CONSTITUTION: The video signal processing unit where a video signal obtained by applying reception processing to a TV signal whose aspect ratio is 4:3 is displayed onto a screen whose aspect ratio is 16:9 with magnification and a caption signal included in the TV signal is processed and displayed is provided with a pattern detection circuit 19 detecting a pattern from the TV signal to discriminate the presence of a non-picture part, a caption signal generating circuit 21 generating a signal of caption information in response to the operation of a remote commander by the user, and a caption insert circuit 20 inserting a signal of the caption information to the non-picture part of the video signal when the pattern detection circuit 19 discriminates the presence of the non- picture part, and magnification display and processing display of the caption information are conducted for an output of the caption insert circuit 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal processing device used for a wide screen television receiver for displaying an image of NTSC broadcast on a screen having a wide aspect ratio and for displaying additional information such as subtitles. .

[0002]

As is well known, a wide-screen television receiver having an aspect ratio of 16: 9 has an aspect ratio of 4: 3.
It has a normal mode and a zoom mode as a function for receiving and displaying the current NTSC broadcast.

In the normal mode, as shown in FIG.
The video signal is time-compressed at a ratio of 3/4 in the horizontal scanning direction to form a blanking area on the left and right of the screen, and a video with an aspect ratio of 4: 3 is displayed on the screen with an aspect ratio of 16: 9. Projected on.

In the zoom mode, as shown in FIG.
The vertical amplitude is extended to the video signal having the aspect ratio of 4: 3, and the video enlarged to the entire screen is displayed on the screen having the aspect ratio of 16: 9.

By the way, in the current NTSC broadcasting,
There is a case where a wide-screen image having a horizontally long cinema size (cinema scope or Vistanize) with an aspect ratio of 16: 9 is captured in an image with an aspect ratio of 4: 3 and broadcast.
Also, in this case, subtitle superimpositions may be inserted in the upper and lower parts where there is no video information.

When the NTSC broadcast of such a cinema size image is received and displayed by the above wide screen television receiver, if the zoom mode is used, the number of scanning lines becomes smaller than that in the normal mode. , The image part can be displayed by enlarging it to the full screen horizontal direction. At this time, a non-image portion is formed on the upper or lower portion of the screen, but the subtitle superimpose inserted in that portion cannot be displayed on the screen.

Therefore, the vertical amplitudes of the subtitle areas inserted in the upper and lower portions are reduced and compressed so that the subtitles can be displayed in the non-image portion without being lost, and the roundness of the picture can be improved to 1
There has been proposed a video signal processing device which projects the image so as to be closer to.

The configuration of this video signal processing device is shown in FIG. In this video signal processing device, a video signal is taken in from an input terminal 11, a horizontal / vertical synchronization timing is detected by a synchronization processing circuit 12, and horizontal / vertical synchronization signals H and V are generated.

Of these, the vertical synchronizing signal V is supplied to the sawtooth wave generating circuit 13. The sawtooth wave generation circuit 13 generates a sawtooth wave signal based on the vertical synchronizing signal V. The sawtooth wave signal is converted into a voltage signal by the sawtooth wave control circuit 14 and supplied to the vertical output circuit 15. The vertical output circuit 15 supplies a deflection coil current similar to the sawtooth wave voltage signal to the vertical deflection coil 16.

On the other hand, in the caption detection circuit 17, the input terminal 1
The video signal is taken in from 1 to detect the presence / absence of a caption, and the vertical phase value indicating the detected caption area is generated based on the horizontal / vertical synchronization signals H and V from the synchronization processing circuit 12. This vertical phase value is supplied to the subtitle compression signal generation circuit 18.
The caption compression signal generation circuit 18 generates a caption compression signal based on the vertical phase value of the caption. This subtitle compression signal is output at a certain level indicating the compression rate. This subtitle compression signal is supplied to the sawtooth wave control circuit 14.

The sawtooth wave control circuit 14 controls the sawtooth wave signal and the closed caption compression signal so that the slope of the sawtooth wave in the closed caption region becomes gentle and outputs the voltage signal. This slope is determined by the level of the compressed subtitle signal.

With the above control, a sawtooth voltage signal whose slope in the subtitle area is slow is generated, and the vertical output circuit 15 causes the deflection coil current similar to the sawtooth voltage to flow to the vertical deflection coil 16. As a result, as shown in FIG. 12, the inclination of the vertical deflection current becomes discontinuous in the subtitle region of the vertical scanning period, and the deflection speed in the subtitle region becomes slow.

That is, since the range scanned by the electron beam of the picture tube is wider than that when the inclination of the deflection current is constant, even when the video signal processing method by the zoom mode is adopted, the subtitle area portion is displayed on the screen. It can be displayed compressed.

On the other hand, the Broadcasting Technology Development Council (hereinafter referred to as BTA
EDTV-2 system (2nd generation EDTV)
A method study report, December 9, 1994, BTA) is being researched and developed.

FIG. 13 shows the line and pixel allocation according to the EDTV-2 system, and FIG. 14 shows the levels of the upper and lower non-picture area signals.
FIG. 15 shows the quantization standard (D2 standard) of the composite signal.

As shown in FIG. 13, the EDTV-2 signal is of the letterbox type, and a horizontal high-frequency signal HH is provided by band-shifting in the area of the main picture area by providing a main picture area in the center and a non-picture area at the top and bottom. 'Is multiplexed, and the moving image vertical reinforcement signal VT and the band-shifted still image vertical reinforcement signal V are provided in the non-image area.
H'is multiplexed.

Note that FIG. 13 shows pixels sampled with a clock that is four times the carrier frequency fsc and is phase-synchronized with the color phase I axis (delayed by 57 degrees from the color burst). The VT / VH 'signal multiplexed in the non-picture part is compressed to 1/3 in the horizontal direction, and 252 pixels are arranged per block as shown in the figure.

As shown in FIG. 14, the VT signal and VH 'signal are ± 15 IRE centered on the pedestal level,
As shown in FIG. 15, in the 8-bit quantization level, the lower 6
Bits can be quantized and the upper 2 bits are not used.

[0019]

As described above, a wide-screen television receiver receives a broadcast signal obtained by capturing a cinema-size wide image into an image with an aspect ratio of 4: 3 and displays it in a zoom mode. In this case, a function has been proposed that enables display of additional information such as a subtitle superimposed on the non-image part. However, the non-image part can be effectively used to display the additional information desired by the user. Realization of the function is desired.

Further, in the EDTV-2 signal, the vertical reinforcement signal is multiplexed in the non-picture portion, but by utilizing the fact that there are unused bits when quantized, additional information is added to this unused portion. It is desired to be able to display it appropriately.

In view of the above background, an object of the present invention is to provide a video signal processing apparatus capable of arbitrarily displaying additional information together with video on a wide screen, capable of recording video, and capable of supporting EDTV-2 signal reproduction. The purpose is to provide.

[0022]

In order to solve the above problems, a first aspect of the present invention is to display a video signal having a first aspect ratio on a screen having a second aspect ratio wider than the first aspect ratio. A video image which is enlarged and displayed, and at the same time, a display control means for forming a non-image portion on the screen and displaying the additional information on the portion when the additional signal is inserted in the non-image portion of the input video signal. In the signal processing device,
No-picture area detection means for detecting the presence or absence of no-picture area from the input video signal, additional information input means for taking in additional information to be displayed on the no-picture area according to an instruction from the outside, and the no-picture area detection means And a non-image portion is detected by the additional information input means, and additional information is input by the additional information input means, an additional signal inserting means for inserting an additional signal corresponding to the additional information into the non-image area of the input video signal. The video signal obtained by the additional signal inserting means is output to the display controlling means.

The second invention is that the input video signal is ED.
Signal determining means for determining whether or not it is a TV-2 signal,
When the signal determining unit determines that the image is not EDTV-2, the non-image unit detecting unit that detects the presence or absence of the non-image unit from the input video signal, and the additional information is extracted from the non-image unit detected by this unit. The additional information extracting means and the signal determining means E
When it is determined that the signal is a DTV-2 signal, the video signal is decoded and output, and when it is determined that the signal is not the EDTV-2 signal, the video signal from which the additional information is extracted by the additional information extracting means is output as it is. -2 decoding means, additional information input means for fetching additional information to be displayed on the non-image portion in accordance with an instruction from the outside, and the additional information extracting means when the non-image portion is detected by the non-image portion detecting means. Additional information inserting means for inserting the additional information extracted by the means and the additional information input by the additional information input means into the non-picture area of the video signal output from the EDTV-2 decoding means, and from this means. The output video signal having the first aspect ratio is enlarged and displayed on the screen having the second aspect ratio wider than the first aspect ratio, and at the same time, is not displayed on the screen. Part is formed, characterized by comprising a display control means for displaying the additional information in the area.

[0024]

In the video signal processing device according to the first aspect of the present invention, when the video signal having the first aspect ratio is enlarged and displayed on the screen having the second aspect ratio wider than the first aspect ratio. At the same time, when an additional signal is inserted in the non-image part of the input video signal, a non-image part is formed on the screen, and display control means for displaying additional information in the part is provided. The presence / absence of a non-picture area is detected, the additional information to be displayed on the non-picture area is taken in according to an instruction from the outside, and the additional signal corresponding to the additional information is inserted into the non-picture area of the input video signal. By outputting to the display control means, it is possible to arbitrarily display the additional information together with the image on the wide screen.

In the video signal processing device according to the second aspect of the invention, it is determined whether the input video signal is the EDTV-2 signal. If it is determined that the input video signal is not the EDTV-2 signal, the input video signal is detected. The presence / absence of a non-image portion is detected, and if the non-image portion has additional information, this additional information is extracted, while the ED
When it is determined that it is the TV-2 signal, the video signal is decoded and output, and when it is determined that it is not the EDTV-2 signal, the video signal from which the additional information has been extracted by the additional information extracting means is output as it is. In this way, the additional information to be displayed on the non-image area is fetched in accordance with an instruction from the outside, and when the non-image area is detected, the extracted additional information and the input additional information are selectively EDTV-2 decoded. The video signal having the first aspect ratio is enlarged and displayed on the screen having the second aspect ratio wider than the first aspect ratio. By forming a non-image part on the screen and displaying the additional information on that part, it is possible to arbitrarily display the additional information together with the image on the wide screen even when the EDTV-2 signal reproduction function is provided. .

[0026]

Embodiments of the present invention will be described in detail below with reference to FIGS. However, in order not to duplicate the description, in FIG. 1, the same parts as those in FIG. 11 are denoted by the same reference numerals, and the description thereof will be omitted.

FIG. 1 shows the configuration of a video signal processing device according to the present invention. Here, it is assumed that it is built in the above-mentioned wide screen television receiver.

In FIG. 1, the video signal (NSTC) fetched from the input terminal 11 is supplied to the pattern detection circuit 19. This pattern detection circuit 19 detects the presence or absence of a non-image portion, and the detection result is the video signal together with the caption insertion circuit 2
0 is supplied. The caption insertion circuit 20 is provided with a caption signal generation circuit 2 when the picture detection circuit 19 detects a non-image portion.
The subtitle signal generated in No. 1 is inserted into the non-picture area of the video signal. The video signal output from the caption insertion circuit 20 is the synchronization processing circuit 12 and the caption detection circuit 1 described above.
7 and is then subjected to the above-mentioned processing.

On the other hand, when the user operates the remote control device (hereinafter, abbreviated as remote controller) 22 and inputs selection data corresponding to desired desired text characters or graphics (hereinafter collectively referred to as subtitle information), the remote controller is operated. Signal light corresponding to the selected data is transmitted from 22. This signal light is received by the remote control light receiver 23,
It becomes selection data and is supplied to the caption signal generation circuit 21. The caption signal generation circuit 21 converts the caption information selected by the user into a caption signal in a predetermined format and gives it to the caption insertion circuit 20.

The video signal output from the subtitle insertion circuit 20 can be output from the output terminal 24 to the outside.

The operation of the above structure will be described below with reference to FIGS.

2, 3 and 4 show the aspect ratio of 16: 9 in which the NSTC signal in which a wide image of a cinema size is captured is built in the image signal processing device having the above-mentioned configuration.
It is an example in the case of displaying on a wide screen television receiver of. In each figure, (a) shows the case where the normal video processing output is displayed on the wide screen as it is, and (b) shows the case where the vertical amplitude is expanded in the above-mentioned zoom mode.

Now, it is assumed that the subtitle super is inserted in the lower non-picture part of the broadcast signal. When the received video signal in this case is given from the input terminal 11 and this video signal is taken out from the output terminal 24 via the pattern detection circuit 19 and the caption insertion circuit 20 and displayed, as shown in FIG. ,
The image is expanded in the horizontal direction, a non-image portion is formed on the upper and lower sides, and a subtitle super is inserted in the lower non-image portion and displayed.

At this time, the video signal is taken into the synchronization processing circuit 12 and the caption detection circuit 17, and the above-mentioned video signal processing is performed. Therefore, the sawtooth wave for vertical scanning is slowly controlled in the period of the non-image part in which the subtitle super is inserted, and the actual display image has a vertical amplitude as shown in FIG. Is expanded and the subtitle super is displayed at the bottom of the bottom.

In this state, when the user selects and operates desired subtitle information (for example, reception channel information and time information) through the remote controller 22, this selection information is sent to the subtitle signal generation circuit 21 through the remote controller light receiver 23, where A corresponding caption signal is generated and sent to the caption insertion circuit 20.

On the other hand, the picture detection circuit 19 detects the upper and lower non-picture areas, and the subtitle insertion circuit 20 detects from the detection result that the upper non-picture area is empty, and the sub-picture area is displayed in the non-picture area. Insert a subtitle signal. Subtitle insertion circuit 2 at this time
When the output of 0 is taken out from the output terminal 24 and wide-screen displayed, as shown in FIG. 3A, the subtitle super is inserted on the lower side and the subtitle information such as channel and time is displayed on the upper side.

In this case, since the caption detection circuit 17 detects caption signals in the upper and lower non-picture portions, the sawtooth wave for vertical scanning is controlled to be slow during the upper and lower non-picture portions. Therefore, in the actual display image, as shown in FIG. 3B, the expansion of the vertical amplitude is limited, the caption information such as the channel and time is displayed in the upper non-picture portion, and the lower non-picture portion is displayed. Subtitle supermarket is displayed.

When the user selects and operates desired subtitle information (for example, reception channel information and time information) through the remote controller 22 when the subtitle information is not included in the broadcast signal, the selection information is obtained through the remote controller receiver 23. It is sent to the caption signal generation circuit 21, where the corresponding caption signal is generated and sent to the caption insertion circuit 20.

On the other hand, the pattern detecting circuit 19 detects the upper and lower non-image portions, and the subtitle insertion circuit 20 detects from the detection result that the upper and lower non-image portions are empty. A caption signal is inserted in the image area. When the output of the caption insertion circuit 20 at this time is taken out from the output terminal 24 and wide-displayed, caption information such as channel and time is displayed in the lower non-image part as shown in FIG. 4A. It

In this case, since the caption detection circuit 17 detects the caption signal in the lower non-picture portion, the vertical scanning sawtooth wave is controlled to be slow during the lower non-picture portion. . Therefore, in the actual display image, as shown in FIG. 4B, the vertical amplitude is expanded, and caption information such as channel and time is displayed in the lower non-image part.

In the example of FIG. 4, the received video signal is E
The same operation is performed even when there is a non-picture portion such as a DTV-2 signal.

As described above, by using the video signal processing device having the above-described structure, the user can arbitrarily select an NTSC signal that captures a cinema-size wide image and a video signal that has a non-image portion such as an EDTV-2 signal. It is possible to insert and display additional information such as a subtitle supermarket. In addition, it is possible to record it in the VTR by outputting it from the output terminal to the outside, and it can be used as an index during reproduction.

Next, referring to FIG. 5, the second embodiment according to the present invention will be described.
An example will be described.

FIG. 5 shows, as a second embodiment, a configuration in which the video signal processing device according to the present invention is mounted on a wide screen television receiver having a built-in VTR. still,
In FIG. 5, the same parts as those in FIG. 1 are designated by the same reference numerals so that the description will not be repeated, and the description thereof will be omitted.

A video signal is taken in from the input terminal 11, and the pattern detection circuit 19 detects whether or not there is a non-image portion in the video signal taken in. On the other hand, when the user operates the remote controller 22 to input selection data corresponding to desired text characters or graphics, the selection data is transmitted from the remote controller 22 via the remote control receiver 23 to a system control microcomputer (hereinafter, (Abbreviated as system microcomputer) 25.

Reception channel information is input to the system microcomputer 25 from the channel selection circuit 26, and the timer 27
The time information is input from. This system microcomputer 25
Is (1) any desired text characters or graphics, (2) reception channel information obtained from the channel selection circuit 26, time information obtained from the timer 27, (3) (1) according to the user's selection operation. Either one of (2) is selected and output to the caption signal generation circuit 21. The caption signal generation circuit 21 generates text or graphics corresponding to the data input from the system microcomputer 25. The caption insertion circuit 20 includes a pattern detection circuit 19
When there is a non-picture portion in the output video signal of, the output signal of the caption signal generating circuit 21 is inserted into the non-picture portion.

The video signal in which the caption is inserted by the caption insertion circuit 20 is output from the output terminal 24 and used for projection, and is also output to the built-in VTR 28 and appropriately recorded. Further, this signal is supplied to the video signal processing of the synchronization processing circuit 12 and the caption detection circuit 17 and thereafter.

Therefore, the inclination of the vertical deflection current becomes discontinuous in the subtitle area during the vertical scanning period, the deflection speed becomes slow in this subtitle area, and the inclination of the deflection current is in the range scanned by the electron beam of the picture tube. Is wider than a fixed value, and the subtitle area is compressed and displayed.

According to the above configuration, by the user's operation, (1) any desired text characters or graphics, (2) receiving channel information and time information,
(3) Both (1) and (2) can be inserted into a video signal including a non-image portion, and projected and recorded. Also, VT
The built-in R makes it possible, for example, to automatically insert user operation information at the time of answering machine setting at the time of answering machine recording.

Next, a third embodiment according to the present invention will be described with reference to FIGS.

FIG. 6 shows, as a third embodiment, an EDTV-
1 shows a configuration of a video signal processing device when mounted on a two-system television receiver.

The video signal taken in from the input terminal 31 is analog-digital converted by the ADC 32 and then output to the synchronization processing circuit 33, the ED identification signal determination circuit 34 and the caption insertion circuit 35.

The ED identification signal determination circuit 34 determines whether or not the input video signal is the EDTV-2 signal by determining whether or not the input video signal includes the EDTV-2 identification signal. It outputs to the circuit 36 and the caption extraction circuit 37, and outputs the determination result to the caption detection circuit 36, the caption extraction circuit 37, the caption signal insertion circuit 35, and the ED processing circuit 39.

The caption detection circuit 36 detects the line in which VH and VT are inserted when the video signal is the EDTV-2 signal by the judgment of the ED identification signal judgment circuit 34, and the caption when it is not the EDTV-2 signal. The line in which is inserted is detected and is sent to the caption extraction circuit 37 and the system microcomputer 38 as a control signal indicating the caption insertion period.

The subtitle extracting circuit 37 sends out data corresponding to a subtitle to a system microcomputer (abbreviation of system control microcomputer) 38 when there is a subtitle, and
The video signal is output to the ED processing circuit 39.

A specific circuit configuration of the caption extracting circuit 37 and its processing operation will be described with reference to FIGS. 7 and 8. FIG. 7A shows the configuration of the caption extraction circuit 37, and FIG.
FIG. 8B shows the truth value relationship, and FIG. 8 shows the input / output timing waveform.

That is, the caption extracting circuit 37 is constructed by using the AND gate 371, and ANDs the input video signal with the output signal of the caption detecting circuit 36 and outputs it. The output signal of the caption detection circuit 36 is, as shown in FIG. 8A, a caption insertion period or VT and VH during EDTV-2.
The line period is at the L level. Therefore, even if the video signal as shown in FIG. 8B is input during this period, the output of the AND gate 371 is all at the L level as shown in FIG. 8C. In this way, the caption signal is extracted from the video signal.

The ED processing circuit 39 performs EDTV decoding processing according to the determination of the ED identification signal determination circuit 34 and outputs it to the caption signal insertion circuit 40.

On the other hand, when the user operates the remote controller 41 to input selection data corresponding to a desired text character or graphics, this selection data is input from the remote controller 41 to the system microcomputer 38 through the remote receiver 42. . Further, reception channel information is input from the channel selection circuit 43 and time information is input to the system microcomputer 38 from the timer 44.

The system microcomputer 38, when the caption is already inserted in the input video signal, that is, the caption extracting circuit 37.
If there is a signal from, the data corresponding to the extracted subtitle super is sent to the subtitle signal generation circuit 45.

When the subtitle super is not inserted, the user operates (1) any desired text characters or graphics, (2) reception channel information obtained from the channel selection circuit 43 and time obtained from the timer 44. When any one of the information (3), (1) and (2) is selected, the system microcomputer 38 outputs the selected data to the caption signal generation circuit 45.

The caption signal generation circuit 45 generates text or graphics corresponding to the selection data input from the system microcomputer 38 as a caption signal. The caption signal output by the caption signal generation circuit 45 is output to the caption insertion circuits 35 and 40.

However, when a caption is already inserted in the input video signal, it is not sent to the caption signal insertion circuit 35.
The output signal of the caption insertion circuit 35 is converted back into an analog signal by the DAC 152 and output from the output terminal 53 to the outside.

On the other hand, the caption insertion circuit 40 inserts the caption signal from the caption signal generation circuit 45 into the video signal from the ED processing circuit 39. The video signal thus generated is output from the output terminal 46 to the outside and used for projection.

Further, the synchronization processing circuit 33 generates horizontal / vertical synchronization signals H and V from the video signal and outputs them to the system microcomputer 38. At this time, the system microcomputer 38
Generates a vertical phase value indicating the detected caption area based on the synchronization signal and the output signal of the caption detection circuit 36. The caption compression signal generation circuit 47 generates a caption compression signal based on the vertical phase value of the caption. This subtitle compression signal is output at a certain level indicating the compression rate.

The sawtooth wave generation circuit 48 generates a sawtooth wave signal based on the vertical synchronizing signal V from the system microcomputer 38. The sawtooth wave control circuit 49 controls the sawtooth wave signal and the caption compression signal so that the inclination of the sawtooth wave in the caption region becomes gentle. This slope is determined by the level of the compressed subtitle signal. By this control, a sawtooth wave voltage whose subtitle region has a slow slope is generated. In the vertical output circuit 50, a deflection coil current similar to a sawtooth wave voltage is supplied to the vertical deflection coil with respect to the deflection yoke 51.

By the above processing, the inclination of the vertical deflection current becomes discontinuous in the subtitle area during the vertical scanning period, and the deflection speed becomes slow in this subtitle area as shown in FIG.
That is, the range scanned by the electron beam of the picture tube is wider than that when the inclination of the deflection current is constant, and the subtitle area portion of the screen is compressed and displayed.

In the video signal processing device having the above configuration, first, when the input video signal includes a cinema size video, but the subtitle signal is not placed in the non-picture area,
In the ED identification signal determination circuit 34, the input video signal is the EDTV
Recognizing that it is not −2, the caption detection circuit 36 detects that there is no caption. Therefore, the caption extraction circuit 37, ED
The processing circuit 39 outputs the input video signal as it is to the subtitle insertion circuit 40.

The system microcomputer 38 determines whether or not there is a user selection operation from the remote controller 41, and if there is a selection operation, the corresponding caption signal is generated.
5, and the caption signal inserting circuits 35 and 40 insert the caption signal into, for example, the lower non-picture area of the video signal.

Next, when a caption signal is added to the input video signal, the ED identification signal determination circuit 34 recognizes that the input video signal is not EDTV-2 and the caption detection circuit 36 determines that there is caption. To detect. Therefore, the caption extraction circuit 37 extracts the caption signal in the caption insertion period and sends it to the system microcomputer 38, and the ED processing circuit 39 outputs the input video signal as it is to the caption insertion circuit 40.

The system microcomputer 38 determines whether or not there is a user selection operation from the remote controller 41, and when there is a selection operation, the corresponding caption signal is generated.
5, the subtitle signal inserting circuit 40 only inserts the subtitle signal in the upper non-picture area of the video signal.

When the input video signal is an EDTV-2 signal, the ED identification signal determination circuit 34 recognizes that the input video signal is EDTV-2, and the caption detection circuit 36 has VT and VH lines. Detect that. Therefore, the ED processing circuit 39 performs EDTV decoding processing on the input video signal and outputs it to the subtitle insertion circuit 40.

The system microcomputer 38 determines whether or not there is a user selection operation from the remote controller 41, and when there is a selection operation, the corresponding caption signal is generated.
5, and the caption signal inserting circuit 40 only inserts the caption signal in the lower non-picture area of the video signal.

The video signal in which the caption signal is inserted by the above processing is projected from the output terminal 46, but in any case, it is output to the sawtooth wave generation circuit 48. At this time, in the system microcomputer 38, the horizontal
The vertical synchronization signals H and V are input, a vertical phase value indicating the detected subtitle area is generated based on the output signal of the subtitle detection circuit 36, and the subtitle compression signal generation circuit 47 receives subtitles based on the vertical phase value. The compressed signal is generated and the sawtooth wave generation circuit 48 is caused to generate the sawtooth wave signal based on the vertical synchronization signal V.

The sawtooth wave control circuit 49 controls the sawtooth wave signal and the caption compression signal so that the inclination of the sawtooth wave in the caption region becomes gentle. By this control, a sawtooth wave voltage whose subtitle region has a slow slope is generated. At this time, in the vertical output circuit 50, a deflection coil current similar to a sawtooth wave voltage is supplied to the deflection yoke 51, so that the vertical deflection coil flows.
The inclination of the vertical deflection current becomes discontinuous in the subtitle area during the vertical scanning period, and the deflection speed becomes slow in this subtitle area as shown in FIG.

As a result, the range of the picture tube scanned by the electron beam becomes wider than that when the inclination of the deflection current is constant, and the subtitle area portion of the screen is compressed and displayed.

Therefore, if a television receiver for EDTV is constructed using the video signal processing device having the above construction,
It is possible for the user to arbitrarily insert and display additional information such as a subtitle superimposing not only on an NTSC signal which captures a cinema-size wide image but also on an EDTV-2 signal. Further, it is possible to record it in the VTR by outputting it from the output terminal 53 to the outside, and it can be used as an index during reproduction.

[0078]

As described above, according to the present invention, it is possible to arbitrarily display the additional information together with the image on the wide screen, the video recording can be supported, and the EDTV-2 signal can also be reproduced at the time of the video signal processing. A device can be provided.

[Brief description of drawings]

FIG. 1 is a block circuit diagram showing a configuration of a first embodiment of a video signal processing device according to the present invention.

FIG. 2 is a diagram showing a display example when a caption is inserted in an input video signal in the first embodiment.

FIG. 3 is a diagram showing an example of displaying additional information instructed by a user when subtitles are inserted in an input video signal in the first embodiment.

FIG. 4 is a diagram showing an example of displaying additional information instructed by a user when subtitles are not inserted in an input video signal in the first embodiment.

FIG. 5 is a block circuit diagram showing a configuration of a second embodiment of a video signal processing device according to the present invention.

FIG. 6 is a block circuit diagram showing the configuration of a third embodiment of the video signal processing device according to the present invention.

FIG. 7 is a diagram showing a specific configuration of a caption extraction circuit of a third embodiment and its logical expression.

FIG. 8 is a timing chart for explaining a processing operation of the caption extraction circuit.

FIG. 9 is a diagram showing a display example in a normal mode of a conventional wide screen television receiver.

FIG. 10 is a diagram showing a display example of a zoom mode of the wide screen television receiver.

FIG. 11 is a block circuit diagram showing a configuration of a conventional video signal processing device.

12 is a waveform diagram for explaining a caption compression operation in the device of FIG.

FIG. 13 is a diagram showing a line and pixel allocation state of the EDTV-2 system.

FIG. 14 is a diagram showing the levels of upper and lower signals of the EDTV-2 system.

FIG. 15 is a diagram showing a quantization standard (D2 standard) of a composite signal.

[Explanation of symbols]

 11 ... Video signal input terminal 12 ... Synchronous processing circuit 13 ... Sawtooth wave generation circuit 14 ... Sawtooth wave control circuit 15 ... Vertical output circuit 16 ... Vertical deflection coil 17 ... Caption detection circuit 18 ... Caption compression signal generation circuit 19 ... Design Detection circuit 20 ... Subtitle insertion circuit 21 ... Subtitle signal generation circuit 22 ... Remote control 23 ... Remote control light receiver 24 ... Subtitle insertion video signal output terminal 25 ... System microcomputer 26 ... Channel selection circuit 27 ... Timer 28 ... Built-in VTR 31 ... Video signal input Terminal 32 ... ADC 33 ... Synchronous processing circuit 34 ... ED identification signal determination circuit 35 ... Subtitle insertion circuit 36 ... Subtitle detection circuit 37 ... Subtitle extraction circuit 38 ... System microcomputer 39 ... ED processing circuit 40 ... Subtitle signal insertion circuit 41 ... Remote control 42 ... remote control light receiver 43 ... selection circuit 44 ... timer 45 ... caption signal generation circuit 46 ... for projection Power terminals 47 ... caption compressed signal generating circuit 48 ... sawtooth wave generating circuit 49 ... sawtooth wave control circuit 50 ... vertical output circuit 51 ... vertical deflection yoke

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location H04N 7/03 7/035

Claims (6)

[Claims] 1. A video signal having a first aspect ratio is enlarged and displayed on a screen having a second aspect ratio wider than the first aspect ratio, and at the same time added to a non-image part of the input video signal. A video signal processing device comprising a display control means for forming a non-image portion on the screen when a signal is inserted and displaying additional information on the portion, and detecting the presence or absence of the non-image portion from the input video signal. Non-image area detection means, additional information input means for taking in additional information to be displayed on the non-image area according to an instruction from the outside, and the non-image area detected by the non-image area detection means, the additional information input means When the additional information is input in, an additional signal inserting means for inserting an additional signal corresponding to the additional information into a non-picture area of the input video signal is provided, and the image obtained by the additional signal inserting means Signal ahead A video signal processing device characterized in that the video signal processing device outputs the video signal to the display control means. 2. A signal determining means for determining whether or not the input video signal is an EDTV-2 signal, and when the signal determining means determines that the input video signal is not EDTV-2, a non-image part is output from the input video signal. Image-free area detection means for detecting the presence / absence, additional information extraction means for extracting additional information from the image-free area detected by this means, and the image when the signal determination means determines that it is an EDTV-2 signal EDTV-
ED for outputting the video signal from which the additional information is extracted by the additional information extracting means when it is determined that the signal is not two signals
TV-2 decoding means, additional information input means for taking in the additional information to be displayed on the non-image portion in accordance with an instruction from the outside, and the additional information when the non-image portion is detected by the non-image portion detecting means. Additional signal inserting means for inserting the additional information extracted by the extracting means and the additional information input by the additional information inputting means into the non-picture area of the video signal output from the EDTV-2 decoding means, and this means. A video signal having a first aspect ratio output from the device is enlarged and displayed on a screen having a second aspect ratio wider than the first aspect ratio, and at the same time, a non-image portion is formed on the screen. A video signal processing device, comprising: a display control means for displaying additional information on a portion. 3. The non-image area detecting means detects the non-image area by detecting a pattern from the input video signal based on a vertical synchronizing signal extracted from the input video signal. The video signal processing device according to any one of claims 1 and 2, characterized in that. 4. The video signal processing according to claim 1, further comprising recording command signal generating means for generating and outputting a recording command signal when the video signal obtained by said additional signal inserting means is output. apparatus. 5. The video signal processing apparatus according to claim 1, further comprising tuning means for outputting tuning information as the additional information. 6. The video signal processing apparatus according to claim 1, further comprising a timer that outputs time information as the additional information.