JP2001313911A - Television transmitter and television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make characters for caption broadcast easy to read, even in the case where an open caption and the character for the caption broadcast are simultaneously displayed on a television screen, taking into consideration actual condition of the caption broadcast. SOLUTION: Whether or not the open caption is in an open caption information detection area 12 (refer to Figure 2) in video is checked by a television transmitter 2a placed at a broadcast station side, teletext broadcasting is performed changing character background luminance of a caption part adaptively according to the check result, and each television receiver 3a provided in each home is made to reproduce the teletext broadcasting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television transmitting apparatus and a television receiver for superimposing and displaying subtitle information on a television video screen broadcast by teletext broadcasting, and more particularly to a television video screen. The present invention relates to a television transmission device and a television receiver that superimpose and display subtitles in an easy-to-read format even when character information such as a telop (open caption) is displayed.

[Summary of the Invention] [0002] The present invention relates to a subtitle screen display method in teletext broadcasting of television, and whether or not character information (open caption) such as a telop is already displayed on a television video screen. Is detected, and based on the detection result, the background luminance level of the subtitle displayed in the subtitle broadcast or the hue and saturation level of the background color,
The display position on the screen is adaptively controlled to make the subtitle information easier to read.

[0003]

2. Description of the Related Art In a character multiplex television broadcast,
The broadcast station superimposes text information for subtitle broadcasting on the video information to be broadcast, transmits a text multiplex broadcast signal, and transmits the text multiplex to a television receiver installed in each home. The received signal obtained by receiving the broadcast signal is separated into video information, audio information, and subtitle information, and the audio is output from the speaker while displaying the video information with the text for the subtitle broadcast superimposed. I have.

[0004]

By the way, in the current television broadcasting system, when starting the subtitle broadcasting, the luminance of the television image in the background of the character for the subtitle broadcasting (for example, because the quality of the program is not degraded). (Background luminance) is set to translucent gray so that the television image behind the subtitle broadcast characters can be seen through.

For this reason, when the video displayed on the television video screen of the television receiver includes character information such as telop (open caption), an open caption is displayed as shown in a screen 101 in FIG. above,
There is a problem that characters for subtitle broadcasting are displayed in an overlapping manner, and the subtitle display becomes very difficult to see.

Therefore, as a method for solving such a problem, the position of the subtitle displayed in two lines at the bottom of the screen is moved to the top of the screen so that the subtitle does not overlap with the character information such as telop. A way to do so was considered.

[0007] However, in such a method, like a news program, from the center to the top of the screen,
In a program in which a main subject such as a person's face is displayed, the caption hides the person's face or the like, which is not preferable.

[0008] For this reason, the difficulty in reading subtitles due to superimposition of subtitles and character information such as telops remains unresolved.

In view of the above circumstances, the present invention takes into account the actual situation of closed caption broadcasting in Japan, and even if open captions and closed caption broadcasting characters are simultaneously displayed on a television screen, the present invention is not limited to this. It is an object of the present invention to provide a television transmitting device and a television receiver that can make the information easier to read.

[0010]

According to a first aspect of the present invention, there is provided a television transmitting apparatus provided in a broadcasting station for transmitting a text multiplex broadcast signal. An open caption detection unit that detects whether an open caption is present in a preset area, among the regions that constitute the video signal, and an open caption detection unit that detects when the caption information is superimposed on the video signal. Character superimposition for superimposing the subtitle information on the video signal while adjusting at least one of the background level, the background color, the background saturation, and the display position on the screen according to the result. And a transmitting unit that converts a video signal output from the text superimposing unit into a text multiplex broadcast signal and transmits the multiplexed broadcast signal.

According to a second aspect of the present invention, there is provided a television receiver provided on the viewer side for receiving a text multiplex broadcast signal and displaying a text multiplex video, the reception signal obtained by receiving the text multiplex broadcast signal. Is selected in advance, and a teletext receiving / selecting unit for reproducing a video signal on which subtitle information is superimposed and a video signal output from the teletext receiving / tuning unit are set in advance in regions. An open caption detection unit for detecting whether or not an open caption exists in the area; extracting caption information in a video signal output from the teletext reception / selection unit; Accordingly, the subtitle information is superimposed on the video signal while adjusting at least one of the background level, the background color, the background saturation, and the display position on the screen of the subtitle information. Thereby, it is characterized in that a teletext reproducing unit for displaying the teletext picture.

According to the above arrangement, it is detected whether or not character information (open caption) such as a telop is already displayed on the television image screen, and based on the detection result, the caption of the subtitle displayed in the subtitle broadcast is detected. Since the background luminance level or the hue of the background color, the saturation level, and the display position on the screen are adaptively controlled, open captions and subtitles are displayed on the TV screen while considering the actual situation of subtitle broadcasting in Japan. Even if characters for broadcast are displayed at the same time,
Characters for subtitle broadcasting can be easily read.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment FIG. 1 shows an embodiment of a television broadcasting system using a television transmitting apparatus according to the present invention and a general television receiver compatible with teletext broadcasting. FIG.

The television broadcasting system 1 shown in FIG.
a generates an NTSC video signal in which the character background luminance of the subtitle portion or the display position of the subtitle on the screen is adaptively changed according to the presence or absence of the open caption, and Transmitting device 2a for performing the transmission, and the television transmitting device 2
and a television receiver 3a for receiving a text multiplex broadcast signal transmitted from a and reproducing text multiplexed video and audio. And this television broadcasting system 1a
Then, the television transmission device 2a arranged on the broadcast station side
It is checked whether or not there is an open caption in the open caption information detection area 12 (see FIG. 2) in the video, and the background luminance of the caption portion and the screen display position of the caption are adaptively determined according to the check result. Is performed, and the television multiplex broadcast is reproduced by the television receivers 3a provided in the respective homes.

The television transmitting apparatus 2a analyzes an NTSC video signal including video, audio, and the like to be broadcast, and sets a predetermined open subtitle information detection area 12
When superimposing an open caption detection unit 4 for checking whether there is an open caption in a computer and a subtitle created by a computer device, a word processing device, a voice recognition device, etc., based on a check result of the open caption detection unit 4, Reduce the background brightness of the part to half level or dark level, or move the subtitle screen display position to NTS
A character superimposing unit 5 for superimposing on a C video signal, and a transmitting unit 6 for converting an NTSC video signal having been subjected to luminance adjustment output from the character superimposing unit 5 into a text multiplex broadcast signal and transmitting the converted signal are provided.

In the television transmitting apparatus 2a, when a subtitle created by a computer, a word processor, a voice recognition device, or the like is superimposed on an NTSC video signal, an NTSC video signal including video, audio, and the like to be broadcasted. Is checked to see if there is an open caption in the preset open subtitle information detection area 12, and if there is no open caption in the open subtitle information detection area 12, the background luminance level of the subtitle part is reduced by half. To make the brightness, the subtitle signal is superimposed on the NTSC video signal, and if there is an open caption in the open subtitle information detection area 12, the background luminance level of the subtitle part is lowered to the dark level, or the subtitle screen display position is moved. Then, the subtitle signal is superimposed on the NTSC video signal and transmitted to each home or the like.

The open subtitle detection unit 4 includes an input terminal 7 for receiving an NTSC video signal including video and audio to be broadcast, and an NTSC video signal input to the input terminal 7 for converting the NTSC video signal into a luminance signal (Y signal) and a color signal. A Y / C / synchronization signal separation circuit 8 for separating the signal into a synchronization signal; Also,
Based on the synchronization signal output from the Y / C / synchronization signal separation circuit 8, the display timing of the image is detected, and the image is opened in the screen at the timing when the image of the preset open subtitle information detection area 12 is displayed. An in-screen open subtitle detection range setting circuit 9 for outputting a subtitle position detection signal is provided. Further, when the in-screen open subtitle detection range setting circuit 9 outputs the in-screen open subtitle position detection signal, the luminance signal (Y signal) output from the Y / C / sync signal separation circuit 8 is preset. Screen for generating a caption control signal indicating that there is an open caption in the video of the open caption information detection area 12 when a part of the luminance signal exceeds the detection level. An open caption level detection circuit 10 is provided.

Then, in this open subtitle detection unit 4,
While separating an NTSC video signal including video, audio, and the like to be broadcast into a luminance signal (Y signal), a chrominance signal, and a synchronization signal, a synchronization signal and a preset open subtitle information detection area 12, for example, FIG. As shown in FIG. 2, an open caption information detection area 12 set to have a height “V” and a width “H” of about ２〜 to ３ of the height of the television image screen 11. Based on this, a portion of the open caption information detection area 12 in the luminance signal is cut out, and a part of the luminance signal obtained by this cutout processing is set to a predetermined detection level, for example, as shown in FIG. It is checked whether the detection level exceeds a detection level "L" set to a value sufficient to detect character information having a high luminance level, and a part of the luminance signal exceeds the detection level "L". When Pun subtitle information detection area 1
A caption control signal indicating that the video in 2 has an open caption is generated and supplied to the character superimposing unit 5.

The character superimposing unit 5 includes an input terminal 13 for receiving character information (information indicating subtitle contents) created by a computer device, a word processing device, a voice recognition device, and the like, and a character information input to the input terminal 13. And a caption signal generation circuit 14 for generating a caption signal (a signal indicating the content of the caption) based on the subtitle signal. Also, this subtitle signal generation circuit 14
When the subtitle signal is output from the subtitle signal, it is checked whether or not the subtitle control signal is output from the open subtitle detection unit 4. If the subtitle control signal is not output from the open subtitle detection unit 4, the background luminance of the subtitle signal is output. If the level is set to half of the normal luminance, and the subtitle control signal is output from the open subtitle detection unit 4, the background luminance level of the subtitle signal is set to the dark level, and the subtitle screen display position is controlled / edited. A circuit 15 and a subtitle signal having been subjected to character background luminance level adjustment and subtitle screen display position control output from the character background luminance control and subtitle screen display position control / editing circuit 15 for vertical retrace of an NTSC video signal. And a subtitle signal superimposing circuit 16 for superimposing in a period (usually around 21H).

When character information created by a computer device, word processing device, voice recognition device, or the like is input, the character superimposing section 5 generates a caption signal corresponding to the character information, and generates an open caption signal. It is checked whether or not the subtitle control signal is output from the detection unit 4, and if the subtitle control signal is not output from the open subtitle detection unit 4, the background luminance level of the subtitle signal is set to normal half luminance, and the open subtitle detection is performed. If the subtitle control signal is output from the unit 4, the background luminance level of the subtitle signal is set to the dark level, or the subtitle screen display position is moved, and the subtitle signal is converted to the vertical blanking period of the NTSC video signal ( Usually, it is superimposed on the portion around 21H) and supplied to the transmission section 6.

The transmitting section 6 modulates a carrier according to the NTSC video signal output from the character superimposing section 5 and modulates the transmission signal after the character multiplexing, and the transmission signal output from the modulator. And an antenna 18 for converting a transmission signal output from the transmission circuit 17 into a text multiplex broadcast signal (wireless signal) and transmitting the converted signal. The transmitting unit 6 modulates the carrier using the NTSC video signal output from the character superimposing unit 5, converts the transmission signal obtained by the modulation into a teletext signal, and is provided in each home. To each television receiver 3a.

Each of the television receivers 3a receives a text multiplex broadcast signal transmitted from the television transmission device 2a and generates a reception signal. The antenna 19 includes: a reception signal output from the antenna 19; A teletext tuner circuit 20 for selecting a received signal of a program specified by a viewer and reproducing an NTSC video signal, and decoding an NTSC video signal output from the teletext tuner circuit 20 to produce a video A text broadcast decoder circuit 21 for reproducing information, audio information, and text information, and a video including an open caption or the like on a screen based on video information and text information output from the text broadcast decoder circuit 21. CR that superimposes and displays character information while displaying
T22.

In each of the television receivers 3a,
A reception signal of a program specified by a viewer is selected from among reception signals obtained by receiving a teletext signal transmitted from the television transmission device 2a, and an NTSC video obtained by the selection operation. Decode the signal,
While playing back video information, audio information, and text information, and displaying an image including open captions, set the background brightness of the text information to a dark level, or move the subtitle screen display position to display text. Information is superimposed.

As described above, in the first embodiment, the television transmitter 2a arranged on the broadcast station side provides
Check whether there is an open caption in the open caption information detection area 12 (see FIG. 2) in the video,
According to the check result, the character background brightness of the subtitle part,
Alternatively, text multiplex broadcasting is performed while the screen display position of the caption is adaptively changed, and each television receiver 3a provided in each home is configured to reproduce the text multiplex broadcast. Considering the actual situation, even when the open caption and the subtitle broadcast characters are simultaneously displayed on the television screen, the subtitle broadcast characters can be made easier to read.

<< Second Embodiment >> FIG. 4 is a block diagram showing an embodiment of a television broadcasting system using a television receiving apparatus according to the present invention and a general television transmitting apparatus.

The television broadcasting system 1 shown in FIG.
b is a television transmitting apparatus 2b arranged on the broadcasting station side and performing teletext broadcasting, and a teletext broadcasting signal transmitted from the television transmitting apparatus 2b arranged in each home and received and the presence or absence of open caption. And a television receiver 3b for reproducing character multiplexed video and audio in which the background brightness of the subtitle portion or the screen display position of the subtitle is adaptively changed according to. Then, in the television broadcasting system 1b, teletext multiplex broadcasting is performed by the television transmission device 2b arranged on the broadcasting station side, and the television receiver 3b provided in each home is used according to the presence or absence of open captions. Then, the video and the audio in which the background luminance of the subtitle portion or the screen display position of the subtitle is adaptively changed are reproduced.

The television transmitting apparatus 2b takes in an NTSC video signal including video and audio to be broadcast and text information to be broadcast, and superimposes a subtitle signal corresponding to the text information on the NTSC video signal. When the background brightness of the subtitle part is reduced to half
A character superimposing unit 30 for superimposing on an SC video signal, and a luminance-adjusted NTSC output from the character superimposing unit 30
A transmitting unit 31 that converts a video signal into a text multiplex broadcast signal and transmits the multiplexed broadcast signal, and multiplexes a subtitle created by a computer device, a word processing device, a voice recognition device, or the like; Is set to half-brightness, the subtitle signal is superimposed on the NTSC video signal, and broadcast to each home.

The character superimposing section 30 includes an input terminal 32 for receiving an NTSC video signal including video and audio to be broadcast, and character information (caption contents) generated by a computer, a word processor, a voice recognition device, or the like. Information)
An input terminal 33 that captures the subtitles, a subtitle signal generation circuit 34 that generates a subtitle signal (a signal indicating subtitle content) based on the character information input to the input terminal 33, and a subtitle signal output from the subtitle signal generation circuit 34 The background brightness level of the caption signal is set to a normal half brightness, and the character background brightness control and the subtitle screen display position control / editing circuit 35 are performed.
The subtitle signal output from the character background luminance control and subtitle screen display position control / editing circuit 35 after the character background luminance level is adjusted or the subtitle screen display position is moved to NT.
A subtitle signal superimposing circuit 36 for superimposing the subtitle signal on the vertical blanking period (normally around 21H) of the SC video signal.

The character superimposing section 30 takes in NTSC video signals including video and audio to be broadcast and character information generated by a computer, word processor, voice recognition device, etc. Is generated, and the background luminance level of the subtitle signal is set to normal half luminance, superimposed on the vertical blanking period (normally around 21H) portion of the NTSC video signal, and supplied to the transmission unit 31. I do.

The transmission unit 31 modulates a carrier according to the NTSC video signal output from the character superimposition unit 30, modulates the transmission signal after character multiplexing, and the transmission signal output from this modulator. A transmission circuit 37 having an amplifier for amplifying the signal, and an antenna 38 for converting a transmission signal output from the transmission circuit 37 into a text multiplex broadcast signal and transmitting the multiplexed broadcast signal. The carrier is modulated using the NTSC video signal, and the teletext signal obtained by the modulation is transmitted to the television receiver 3b provided in each home or the like.

Each of the television receivers 3b receives a teletext broadcast signal and reproduces an NTSC video signal, and a teletext receiving / selecting section 39;
Analyzes the NTSC video signal output from the PC, and sets a preset open subtitle information detection area 49 (see FIG. 5).
An open subtitle detection unit 40 for checking whether there is an open caption in the NTSC video signal in which the luminance signal of the subtitle portion is reduced to a half level or a dark level based on a check result of the open subtitle detection unit 40;
Alternatively, a teletext reproduction unit 41 for reproducing an NTSC video signal whose caption is moved to the screen display position, and a CRT 42 for displaying the NTSC video signal output from the text broadcast reproduction unit 41 on the screen are provided.

In each of the television receivers 3b,
The reception signal of the program specified by the viewer is selected from among the reception signals obtained by receiving the text multiplex broadcast signal transmitted from the television transmission device 2b, and the NTSC video obtained by this selection operation is selected. Decode the signal,
Video information, audio information, and text information are reproduced, and when there is no open caption, the text background luminance level of the subtitle part is set to the same level (half luminance level), and the subtitle is superimposed on the TV video screen. In addition, when there is an open caption, the character background luminance level of the subtitle portion is lowered to the dark level, or the subtitle screen display position is moved to superimpose the subtitle on the television video screen.

The teletext receiving / selecting section 39 receives the teletext multiplex signal transmitted from the television transmitter 2b and generates a received signal. And a teletext tuner circuit 44 for selecting a received signal of a program designated by the viewer and reproducing an NTSC video signal, and receiving a teletext signal transmitted from the television transmitter 2b. And a received signal of a program designated by a viewer is selected from the received signals to reproduce an NTSC video signal. Section 41.

The open subtitle detection unit 40 separates the NTSC video signal output from the teletext reception / tuning unit 39 into a luminance signal (Y signal), a chrominance signal, and a synchronization signal.
Based on the synchronization signal separation circuit 45 and the synchronization signal output from the Y / C / synchronization signal separation circuit 45, the display timing of the image is detected, and the image of the preset open subtitle information detection area 49 is displayed. When the in-screen open subtitle position detection signal is output from the in-screen open subtitle detection range setting circuit 46 that outputs the in-screen open subtitle position detection signal, It is checked whether or not the luminance signal output from the Y / C / synchronization signal separation circuit 45 exceeds a preset detection level. If a part of the luminance signal exceeds the detection level, open subtitle information detection is performed. An in-screen open caption level detection circuit 47 for generating a caption control signal indicating that the video in the area 49 has an open caption; It is provided.

In the open subtitle detecting unit 40, the NTSC output from the teletext receiving / selecting unit 39
While separating the video signal into a luminance signal (Y signal), a color signal, and a synchronization signal, a synchronization signal and a preset open subtitle information detection area 49, for example, as shown in FIG. 48, an open caption information detection area 49 in the luminance signal based on an open caption information detection area 49 set to have a height “V” of about ２〜 to の and a width “H”. A portion is cut out, and a part of the luminance signal obtained by the cutout process detects a preset detection level, for example, character information having a high luminance level such as a white character as shown in FIG. It is checked whether or not the detection level exceeds a detection level “L” set to a value sufficient for the open subtitle information detection area 4 when a part of the luminance signal exceeds the detection level “L”.
A caption control signal indicating that the video of No. 9 has an open caption is generated and supplied to the teletext playback unit 41.

The teletext reproduction section 41 decodes the NTSC video signal output from the teletext receiving / selecting section 39, extracts text information contained in the NTSC video signal, and, based on the text information, generates subtitles. When the subtitle control signal is not output from the subtitle signal decoder circuit 50 that generates the signal and the open subtitle detection unit 40, the background luminance level of the subtitle signal output from the subtitle signal decoder circuit 50 is left unchanged (half luminance level). ), And when the subtitle control signal is output from the open subtitle detection unit 40, the background luminance level of the subtitle signal output from the subtitle signal decoder circuit 50 is reduced to the dark level, or the subtitle is displayed on the screen. And a subtitle signal control circuit 51 for moving the NTSC video signal and an NTSC video signal output from the teletext receiving / selecting unit 39. In, and a caption signal / video signal superimposition circuit 52 for superimposing the caption signal outputted from the caption signal control circuit 51.

The teletext reproduction section 41 extracts the text information included in the NTSC video signal output from the teletext receiving / selecting section 39, generates a subtitle signal, and outputs the subtitle signal from the open subtitle detection section 40. When the control signal is not output, the background luminance level of the subtitle signal is kept as it is (half luminance level), and the open subtitle detection unit 4
When the subtitle control signal is output from 0, the background luminance level of the subtitle signal is lowered to the dark level, or the subtitle screen display position is moved, and the subtitle broadcast receiving / selecting unit 3 is output.
The subtitle signal whose luminance has been adjusted is superimposed on the NTSC video signal output from the PC 9, and the video including the open caption and the character information are superimposed and displayed on the screen of the CRT 42.

As described above, in the second embodiment, the television transmitter 2b arranged on the broadcast station side provides
Teletext multiplex broadcasting is carried out, and the television receiver 3b provided in each home converts video and audio in which the background luminance of the subtitle portion or the screen display position of the subtitle is adaptively changed according to the presence or absence of the open caption. Because it is made to play, even if the open caption and the character for the subtitle broadcast are displayed simultaneously on the TV screen, the character for the subtitle broadcast is made easier to read while considering the actual situation of subtitle broadcasting in Japan be able to.

<< Other Embodiments >> In the above-described first and second embodiments, the presence or absence of an open caption in a screen is detected, and the subtitle background luminance is changed from a half luminance state to a dark state. Adaptively controls to make subtitles easier to read even when open captions are displayed, but when displaying subtitles, depending on the presence or absence of open captions, the background hue or saturation level of the subtitle part May be changed from such light blue to dark blue if the normal hue and saturation level, for example, the normal background saturation level is light blue. Further, the subtitle screen display position may be moved according to the presence or absence of the open caption.

In this manner, as in the first and second embodiments described above, even when the open caption and the subtitle broadcast characters are simultaneously displayed on the television screen, the subtitle broadcast Can be read easily.

[0041]

As described above, according to the present invention, it is detected whether or not character information (open caption) such as a telop is already displayed on a television image screen, and based on the detection result, subtitle broadcasting is performed. The background brightness level or the hue and saturation level of the subtitles displayed in the subtitles, or the display position of the subtitles on the screen are adaptively controlled. Even when an open caption and subtitle broadcast characters are simultaneously displayed on the screen, the subtitle broadcast characters can be easily read.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a television broadcast system using a television transmitter according to the present invention and a television receiver compatible with general teletext broadcasting.

FIG. 2 is an explanatory diagram showing an example of an open caption detection area used in the television transmission device shown in FIG.

FIG. 3 is an explanatory diagram showing an example of a relationship between a detection level and a luminance signal level used in the television transmission device shown in FIG.

FIG. 4 is a block diagram showing a second embodiment of a television broadcast system using a television receiver according to the present invention and a general television transmitter.

FIG. 5 is an explanatory diagram showing an example of an open caption detection area used in the television receiver shown in FIG.

FIG. 6 is an explanatory diagram showing a relationship example between a detection level and a luminance signal level used in the television receiver shown in FIG.

FIG. 7 is an explanatory diagram showing an example of a screen when an open caption on a television screen and news subtitles overlap in the current television broadcasting system.

[Explanation of symbols]

1a, 1b ... television broadcasting system, 2a, 2b ...
Television transmitters, 3a, 3b television receiver, 4 open caption detector, 5 character superimposing unit, 6 ...
Transmission unit, 7: input terminal, 8: Y / C / synchronous signal separation circuit, 9: open caption detection range setting circuit in screen, 10 ...
Open subtitle level detection circuit in screen, 11: TV video screen, 12: Open subtitle information detection area, 13: Input terminal, 14: Subtitle signal generation circuit, 15: Character background luminance control and subtitle screen display position control / editing circuit , 16: Caption signal superimposition circuit, 17: Transmission circuit, 18, 19: Antenna, 20: Teletext tuner circuit, 21: Teletext decoder circuit, 22: CRT, 30: Text superimposition unit, 3
DESCRIPTION OF SYMBOLS 1 ... Transmission part, 32,33 ... Input terminal, 34 ... Caption signal generation circuit, 35 ... Character background luminance control and caption screen display position control / editing circuit, 36 ... Caption signal superposition circuit, 37 ...
Transmission circuit, 38 antenna, 39 teletext receiving / selecting unit, 40 open caption detection unit, 41 teletext playback unit, 42 CRT, 43 antenna, 44 teletext tuner circuit, 45 Y / C / synchronous signal separation circuit, 46
... open-caption detection range setting circuit in screen, 47 ... open-caption level detection circuit in screen, 48 ... TV video screen,
49: Open subtitle information detection area, 50: Subtitle signal decoder circuit, 51: Subtitle signal control circuit, 52: Subtitle signal / video signal superimposing circuit

Claims (2)

[Claims] 1. A television transmitting apparatus provided at a broadcasting station for transmitting a text multiplex broadcast signal, wherein an open caption exists in a preset area of an area constituting a video signal to be broadcast. An open caption detection unit for detecting whether or not to perform, when superimposing the caption information on the video signal, according to a detection result of the open caption detection unit, the background level, background color, background saturation, A character superimposing unit that superimposes the subtitle information on the video signal while adjusting at least one of the display positions of the above, and converts a video signal output from the character superimposing unit into a text multiplex broadcast signal. A television transmission device comprising: 2. A television receiver provided on a viewer side for receiving a text multiplex broadcast signal and displaying a text multiplex video, wherein a reception signal obtained by receiving the text multiplex broadcast signal is selected. A text broadcast receiving / selecting unit for reproducing a video signal on which caption information is superimposed, and a video signal output from the text broadcast receiving / selecting unit, which is included in a preset region An open subtitle detection unit that detects whether an open caption exists; and extracts subtitle information in a video signal output from the teletext reception / selection unit, and according to a detection result of the open subtitle detection unit, While adjusting at least one of the background level, the background color, the background saturation, and the display position on the screen of the subtitle information, the subtitle information is superimposed on the video signal, A television receiver comprising: a teletext playback unit that displays multiplexed video.