JP4882782B2 - Subtitle broadcast display system and broadcast receiver - Google Patents

Description

  The present invention relates to a caption broadcast display system and a broadcast receiving apparatus.

  Conventionally, television programs include programs that perform subtitle broadcasting that displays subtitles together with video. For example, a subtitle program receiving system (for example, patents) that can selectively change the subtitle presentation format according to the preference of the receiving side. Document 1) has been proposed.

By the way, when the subtitle broadcast is carried out in a live broadcast program such as a news program, that is, when the subtitle broadcast is a so-called real-time subtitle broadcast, the subtitle is created after the performer speaks. The display of subtitles is delayed, and therefore the subtitles of the previous topic may be displayed even if the topic is switched.
Therefore, for example, subtitle delay time is calculated based on delay control information included in a video signal with subtitles transmitted from a broadcasting station or the like, and the video and subtitle are synchronized based on the calculated subtitle delay time. Video / audio based on video / audio signals based on delay time information included in a broadcast signal transmitted from a broadcast signal transmitted from a broadcast signal transmitted from a broadcast signal transmitted from a delay control device for video signals with subtitles (for example, see Patent Document 2) that generates a subtitle synchronized video signal And a subtitle broadcast receiving apparatus that adjusts the output time difference between the subtitle and the subtitle based on the subtitle signal and superimposes the subtitle on the video and audio (see Patent Document 3, for example).
JP 2000-350117 A JP 2006-211636 A Japanese Patent Application Laid-Open No. 2004-207821

However, since the techniques disclosed in Patent Documents 2 and 3 are techniques for correcting the difference between the displayed subtitles and the video based on advanced information such as delay control information and delay time information, the advanced information. There is a problem that it is troublesome for the broadcasting station side to create.
In addition, since the technique disclosed in Patent Document 1 is a technique for selectively changing the caption presentation format, the deviation between the displayed caption and video that occurs in real-time caption broadcasting cannot be resolved.

  An object of the present invention is to provide a subtitle broadcast display system and a broadcast receiving apparatus that can easily correct the deviation between subtitles and video.

In order to solve the above-mentioned problem, the invention described in claim 1
In a caption broadcast display system comprising: a broadcast transmitter that transmits a television broadcast signal; and a broadcast receiver that receives a television broadcast signal transmitted by the broadcast transmitter.
The broadcast transmitting device is:
Transmission means for transmitting a television broadcast signal including subtitle information having subtitle start information indicating the start of subtitles and subtitle end information indicating the end of subtitles, and video information,
The broadcast receiving device is:
Receiving means for receiving a television broadcast signal transmitted by the transmitting means;
Detecting means for detecting the caption start information and the caption end information from the caption information included in the television broadcast signal received by the receiving means;
Output control means for causing the video output means to output subtitle information and video information included in the television broadcast signal received by the receiving means,
The output control means includes
The display screen of the video output means is divided into a subtitle display screen and a video display screen from when the subtitle start information is detected by the detection means until the subtitle end information is detected, and the subtitle information is divided into the subtitle information. Output from the display screen, output the video information from the video display screen,
When the number of characters based on the subtitle information displayed on one screen exceeds a predetermined threshold from when the subtitle start information is detected by the detecting means to when subtitle end information is detected, or one screen If the last character of the character based on the subtitle information to be displayed is a character other than the predetermined character indicating the end of a sentence, the said caption information is output in the standard reproduction speed, the standard the video information Output at a slower playback speed than the playback speed ,
A delay time of the video information generated between detection of subtitle start information and detection of subtitle end information by the detecting means is calculated, and the video information ahead of the delay time is calculated at a predetermined timing. It is characterized by outputting.

The invention described in claim 2
Receiving means for receiving a television broadcast signal including subtitle information including subtitle start information indicating the start of the subtitle and subtitle end information indicating the end of the subtitle, and video information;
Detecting means for detecting the caption start information and the caption end information from the caption information included in the television broadcast signal received by the receiving means;
Output control means for causing the video output means to output subtitle information and video information included in the television broadcast signal received by the receiving means;
With
The output control means causes the subtitle information to be output at a standard reproduction speed when a predetermined condition is satisfied from when the subtitle start information is detected by the detection means until the subtitle end information is detected. The video information is output at a delay reproduction speed slower than the standard reproduction speed .

The invention according to claim 3
The broadcast receiving device according to claim 2,
The output control unit divides the display screen of the video output unit into a subtitle display screen and a video display screen until the subtitle end information is detected after the detection unit detects subtitle start information, The caption information is output from the caption display screen, and the video information is output from the video display screen.

The invention according to claim 4
In the broadcast receiving device according to claim 2 or 3,
The case where the predetermined condition is satisfied is a case where the number of characters based on the caption information displayed on one screen exceeds a predetermined threshold.

The invention described in claim 5
In the broadcast receiving device according to claim 2 or 3,
The case where the predetermined condition is satisfied is a case where the last character of the characters based on the caption information displayed on one screen is a character other than the predetermined character indicating the end of the sentence, To do.

The invention described in claim 6
In the broadcast receiving device according to any one of claims 2 to 5,
The output control means calculates a delay time of the video information generated between the detection of the caption start information by the detection means and the detection of the caption end information, and at a predetermined timing, the delay time The above-mentioned video information is output.

According to the first aspect of the present invention, the number of characters based on the subtitle information displayed on one screen is from the predetermined threshold value until the subtitle end information is detected after the subtitle start information is detected by the detecting means. If the subtitle displayed on one screen is long, or the last character of the characters based on the subtitle information displayed on one screen is a character other than a predetermined character indicating the end of the sentence If it is, that is, when a long sentence constituting subtitles, the movies image information can be output by delaying the playback speed.
Therefore, it is possible to easily correct the deviation between the caption and the video.

Further, the output control means divides the display screen of the video output means into a subtitle display screen and a video display screen from the detection of the caption start information by the detection means to the detection of the caption end information, and Information can be output from the caption display screen, and video information can be output from the video display screen.
Accordingly, it is possible to easily display the caption information without performing troublesome processing such as combining and superimposing the caption information on the video information and outputting it.

In addition, the output control means calculates the delay time of the video information generated between the detection of the caption start information by the detection means and the detection of the caption end information, and the delay time is increased by a predetermined timing. Video information can be output.
Therefore, by outputting the substantially real-time video information at a predetermined timing, it is possible to eliminate the delay of the video information that has occurred between the detection of the caption start information and the detection of the caption end information. Easy to use.

According to the invention described in claim 2, during a period from the subtitle start information is detected by the detection means to the subtitle termination information is detected, playback speed delay when a predetermined condition is satisfied, the movies image information in can be output.
Therefore, it is possible to easily correct the deviation between the caption and the video.

According to the third aspect of the invention, the same effect as that of the second aspect of the invention can be obtained. Of course, the output control means detects the subtitle start information after the detection means detects the subtitle start information. Until the image is detected, the display screen of the video output means is divided into a subtitle display screen and a video display screen, and the subtitle information is output from the subtitle display screen and the video information is output from the video display screen. be able to.
Accordingly, it is possible to easily display the caption information without performing troublesome processing such as combining and superimposing the caption information on the video information and outputting it.

According to the invention described in claim 4, it is needless to say that the same effect as that of the invention described in claim 2 or 3 can be obtained, and the output control means uses the subtitle information displayed on one screen. When the number exceeds a predetermined threshold, that is, when the subtitles displayed on one screen are long, the video information is output at the reproduction speed for delay , so that the deviation between the subtitles and the video can be corrected more reliably.

According to the invention described in claim 5, it is needless to say that the same effect as that of the invention described in claim 2 or 3 can be obtained, and the output control means uses the subtitle information displayed on one screen. When the last character is a character other than a predetermined character indicating the end of the sentence, that is, when the sentence constituting the caption is long, the video information is output at the playback speed for delay . The deviation from the video can be corrected.

According to the invention described in claim 6, it is needless to say that the same effect as that of any one of the inventions described in claims 2 to 5 can be obtained. It is possible to calculate the delay time of the video information generated from the detection until the caption end information is detected, and to output the video information of the delay time ahead at a predetermined timing.
In other words, by outputting substantially real-time video information at a predetermined timing, it is possible to eliminate the delay of video information that occurs between detection of subtitle start information and detection of subtitle end information. Easy to use.

  Hereinafter, the best mode of a caption broadcast display system and a broadcast receiving apparatus according to the present invention will be described in detail with reference to the drawings. The scope of the invention is not limited to the illustrated example.

<Configuration of caption broadcasting display system>
First, the configuration of the caption broadcast display system 1 will be described with reference to FIGS.
For example, as shown in FIG. 1, the caption broadcast display system 1 includes a broadcast transmission device 10 that transmits a television broadcast signal (hereinafter referred to as a “TV broadcast signal”), and a TV broadcast transmitted by the broadcast transmission device 10. And a broadcast receiving device 30 for receiving signals.

(Broadcast transmitter)
The broadcast transmission apparatus 10 is installed in, for example, a broadcasting station, and includes, for example, a caption generation unit 11, a transmission unit 12 having an antenna 12a, a control unit 13, and the like as shown in FIG. Composed.

  The subtitle generating unit 11 generates subtitle information by performing predetermined processing such as voice recognition processing, for example, according to the control signal input from the control unit 13, and subtitle start information and subtitle end information are added to the generated subtitle information. Is output to the transmitter 12.

Here, the subtitle start information and the subtitle end information are, for example, information inserted as text in the subtitle information. For example, a character based on the subtitle start information is inserted before the first character of the subtitle related to one topic. At the same time, a character based on the caption end information is inserted after the last character of the caption related to the one topic.
Characters based on subtitle start information and subtitle end information do not need to be actually displayed as subtitles and must be distinguishable from characters that are actually displayed as subtitles. There must be.
One topic is determined, for example, by the caption generation unit 11 determining topic switching based on switching of video or the like.

Note that the caption generation unit 11 determines not only the topic switching based on the switching of the video and inserts the caption start information and the caption end information in the caption information, but also the caption start information and the caption end information in the caption information. The insertion timing can be arbitrarily set on the broadcast station or the like, and may be inserted at regular intervals, for example.
In addition, the caption generation unit 11 may generate caption information not only by performing predetermined processing such as voice recognition processing and generating caption information but also by operator input.
Further, the caption start information and the caption end information may be inserted into the caption information by operator input, for example.

  In accordance with the control signal input from the control unit 13, the transmission unit 12, for example, as a transmission unit, video information, audio information, subtitle start information indicating the start of subtitles input from the subtitle generation unit 11, and the end of the subtitles A TV broadcast signal including subtitle information having subtitle end information indicating "." Is transmitted.

  For example, as shown in FIG. 2, the control unit 13 includes a CPU (Central Processing Unit) 131, a RAM (Random Access Memory) 132, a ROM (Read Only Memory) 133, and the like.

  For example, the CPU 131 performs various control operations according to various processing programs for the broadcast transmission device 10 stored in the ROM 133.

  The RAM 132 includes, for example, a program storage area for expanding a processing program executed by the CPU 131, a data storage area for storing input data, a processing result generated when the processing program is executed, and the like.

The ROM 133 is, for example, a system program that can be executed by the broadcast transmitting apparatus 10, various processing programs that can be executed by the system program, data that is used when these various processing programs are executed, and processing results that are arithmetically processed by the CPU 131. Store data etc. Note that the program is stored in the ROM 133 in the form of a computer readable program code.
Specifically, the ROM 133 stores, for example, a caption generation control program 133a and a transmission control program 133b as shown in FIG.

  For example, the caption generation control program 133a causes the CPU 131 to realize a function of causing the caption generation unit 11 to generate caption information and to insert caption start information and caption end information into the generated caption information.

  For example, the transmission control program 133b causes the CPU 131 to realize a function of causing the transmission unit 12 to transmit a TV broadcast signal including subtitle information, video information, and audio information.

<Broadcast receiving device>
The broadcast receiving apparatus 30 is installed, for example, in a home or facility, or mounted on a portable terminal. For example, as shown in FIG. 3, a tuner 31 having an antenna 31a, a demodulator 32, and a separator 33 A decoder 34, a buffer 35, an output unit 36, a control unit 37, and the like.

The tuner 31 according to the control signal input from the control unit 37, for example, as reception means, the subtitle information having the subtitle start information and the subtitle end information transmitted by the transmission unit 12 of the broadcast transmission device 10, the video information, The TV broadcast signal including the audio information is received.
Specifically, for example, the tuner 31 receives a TV broadcast signal existing in a frequency band corresponding to a physical channel of a program desired by a user from digital television broadcast waves received by the antenna 31a. The received TV broadcast signal is modulated and output to the demodulator 32.

  The demodulator 32 performs a predetermined process such as an error correction process or a demodulator process on the TV broadcast signal input from the tuner 31 according to the control signal input from the controller 37 to generate a transport stream. Then, the generated transport stream is output to the separation unit 33.

  The separating unit 33 separates the transport stream input from the demodulating unit 32 into subtitle information, video information, audio information, and the like according to the control signal input from the control unit 37, and sends it to the decoder 34. Output.

  In accordance with the control signal input from the control unit 37, the decoder 34 performs predetermined processing such as decoding processing on the caption information, video information, audio information, and the like input from the separation unit 33, for example, and performs buffer 35. Output to.

  The buffer 35 sequentially stores, for example, subtitle information, video information, audio information, and the like input from the decoder 34 according to a control signal input from the control unit 37, and the stored subtitle information, Video information and audio information are output to the output unit 36.

  As shown in FIG. 3, for example, the output unit 36 includes a video output unit 36a as a video output unit, an audio output unit 36b, and the like.

  The video display unit 36 a is, for example, a liquid crystal display device, and outputs a subtitle based on the subtitle information output from the buffer 35, a video based on the video information output from the buffer 35, and the like.

  The audio output unit 36b is, for example, a speaker device, and outputs audio based on audio information input from the buffer 35, for example.

  For example, as shown in FIG. 3, the control unit 37 includes a CPU 371, a RAM 372, a ROM 373, and the like.

  The CPU 371 performs various control operations according to various processing programs for the broadcast receiving device 30 stored in the ROM 373, for example.

  The RAM 372 includes, for example, a program storage area for expanding a processing program executed by the CPU 371, a data storage area for storing input data, a processing result generated when the processing program is executed, and the like.

The ROM 373 includes, for example, a system program that can be executed by the broadcast receiving apparatus 30, various processing programs that can be executed by the system program, data that is used when these various processing programs are executed, and processing results that are arithmetically processed by the CPU 371. Store data etc. Note that the program is stored in the ROM 373 in the form of a computer readable program code.
Specifically, the ROM 373 stores a detection program 373a, an output control program 373b, and the like as shown in FIG. 3, for example.

For example, the detection program 373a causes the CPU 371 to realize a function of detecting subtitle start information and subtitle end information from subtitle information included in the TV broadcast signal received by the tuner 31.
Specifically, the CPU 371 detects subtitle start information and subtitle end information from subtitle information that has been subjected to predetermined processing such as decoding processing by the decoder 34, for example.
The CPU 371 functions as a detection unit by executing the detection program 373a.

  The output control program 373b, for example, transmits subtitle information and video information included in the TV broadcast signal received by the tuner 31 to the video output unit 36a via the demodulation unit 32, the separation unit 33, the decoder 34, the buffer 35, and the like. The CPU 371 realizes a function of outputting the audio information included in the TV broadcast signal to the audio output unit 36b via the demodulation unit 32, the separation unit 33, the decoder 34, the buffer 35, and the like.

  Specifically, for example, the CPU 371 turns on the time shift mode from when the caption start information is detected until the caption end information is detected by the CPU 371 executing the detection program 373a.

While the time shift mode is OFF, for example, the CPU 371 reproduces the video information and audio information stored in the buffer 35 at the “standard reproduction speed” and outputs them to the video output unit 36a and the audio output unit 36b.
Here, the “standard playback speed” is, for example, a TV broadcast transmitted from the transmission unit 12 of the broadcast transmitting apparatus 10 by reproducing and outputting the information stored in the buffer 35 at the “standard playback speed”. This is a speed at which video information and audio information (that is, broadcast from a broadcasting station or the like) included in the signal can be output in substantially real time.

  On the other hand, while the time shift mode is ON, that is, until the caption end information is detected after the caption start information is detected by the CPU 371 executing the detection program 373a, the CPU 371, for example, as shown in FIG. Then, the display screen G of the video output unit 36a is divided into a subtitle display screen G1 and a video display screen G2, and the subtitle information is output from the subtitle display screen G1, and the video information is output from the video display screen G2.

  Further, when a predetermined condition is satisfied while the time shift mode is ON, the CPU 371 reduces the reproduction speed of the video information and the audio information, for example, and outputs the video information and the audio information with respect to the caption information. By delaying the video information and the audio information with respect to the subtitle information.

Specifically, for example, when a predetermined condition is satisfied while the time shift mode is ON, the CPU 371 reproduces the subtitle information stored in the buffer 35 at “standard reproduction speed” and outputs it to the video output unit 36a. The video information and the audio information stored in the buffer 35 are reproduced at a “delay reproduction speed” slower than the “standard reproduction speed” and output to the video output unit 36a and the audio output unit 36b.
Here, when the predetermined condition is satisfied, for example, when the number of characters based on caption information displayed on one screen exceeds a predetermined threshold, or characters based on caption information displayed on one screen The last character is a character other than a predetermined character indicating the end of the sentence (for example, “. (Punctuation mark)” or “” (closed bracket)).
The “delayed playback speed” is, for example, a speed slower than the “standard playback speed”, and is substantially compatible with subtitle information even when the subtitles displayed on one screen and the sentences constituting the subtitles are long. The speed is suitable for outputting video information and audio information.

For example, the CPU 371 calculates the delay time of the video information and audio information generated while the time shift mode is ON, and outputs the video information and audio information ahead of the delay time at a predetermined timing.
Specifically, for example, the CPU 371 calculates the delay time of the video information and the audio information generated while the time shift mode is ON, and at a predetermined timing, the CPU 371 stores the video information and the audio information stored in the buffer 35. The video information and audio information corresponding to the delay time are deleted, and the video information and audio information ahead of the delay time are reproduced and output to the video output unit 36a and the audio output unit 36b.
That is, the CPU 371 outputs video information and audio information (that is, broadcast from a broadcasting station or the like) in substantially real time at a predetermined timing.
Here, the predetermined timing is, for example, a point in time when subtitle end information is detected.

More specifically, for example, as illustrated in FIG. 5, the CPU 371 reproduces the caption information “caption A” to “caption D” having caption start information and caption end information at “standard playback speed”, and the abbreviation. Output in real time.
“Subtitle A” to “Subtitle D” are subtitle information displayed on one screen, respectively. For example, as shown in FIG. 5, the output periods of “Subtitle A” to “Subtitle D” are different from each other, and become longer as the number of characters displayed on one screen increases, for example.
Here, for example, when “subtitle C” of “subtitle A” to “subtitle D” satisfies a predetermined condition (the number of characters based on subtitle information displayed on one screen exceeds a predetermined threshold value) Or the last character of the characters based on the caption information displayed on one screen is a character other than a predetermined character indicating the end of a sentence).

Further, for example, as illustrated in FIG. 5, the CPU 371 outputs “video / audio A” to “video / audio D” corresponding to “caption A” to “caption D”, respectively.
Here, assuming that the real-time video information / audio information “video / audio A” to “video / audio D” are output in real time without delay, the output period is, for example, as shown in FIG. They are almost identical to each other.
Since “video / audio C” is video / audio information that is output when a predetermined condition is satisfied (when “subtitle C” is output), it is reproduced and output at “reproduction speed for delay”. The Therefore, for example, as shown in FIG. 5, the output period of “video / audio C” is longer than the output period when real-time video / audio information “video / audio C” is temporarily output.
Other video information / audio information (“video / audio A”, “video / audio B”, and “video / audio D”) other than “video / audio C” is reproduced and output at “standard reproduction speed”.

Further, for example, as shown in FIG. 5, the CPU 371 outputs “video / audio D”, and then outputs “video / audio E”, “video / audio F”,. At this time, the CPU 371, at a predetermined timing (when subtitle end information is detected), video information and audio information corresponding to the delay time (specifically, “video / audio” of the real-time video information / audio information shown in FIG. 5). E ”) is erased, and the video information and audio information ahead of the delay time are reproduced at“ standard reproduction speed ”and output in substantially real time.
The CPU 371 functions as an output control unit by executing the output control program 373b.

(Processing when time shift mode is ON)
Next, processing when the time shift mode is ON by the broadcast receiving device 30 included in the caption broadcast display system 1 will be described with reference to the flowchart of FIG.

  First, the CPU 371 executes the detection program 373a to detect caption start information from the TV broadcast signal received by the tuner 31 (step S11), turns on the time shift mode (step S12), and performs output control. The program 373b is executed to start split display in which the display screen G of the video output unit 36a is split into a subtitle display screen G1 and a video display screen G2.

  Next, the CPU 371 determines whether or not the number of characters based on the caption information displayed on one screen exceeds a predetermined threshold (step S13).

  If it is determined in step S13 that the number of characters based on the caption information displayed on one screen does not exceed a predetermined threshold (step S13: No), the CPU 371 It is determined whether or not the last character of is a predetermined character indicating the end of the sentence (step S14).

  When it is determined in step S14 that the last character among the characters based on the caption information displayed on one screen is a predetermined character indicating the end of the sentence (step S14; Yes), the CPU 371 stores the character in the buffer 35. The subtitle information, the video information, and the audio information are reproduced at “standard reproduction speed” and output to the video output unit 36a and the audio output unit 36b (step S15), and the process proceeds to step S17.

  On the other hand, if it is determined in step S13 that the number of characters based on the caption information displayed on one screen exceeds a predetermined threshold (step S13; Yes), or the caption information displayed on one screen is displayed in step S14. If the CPU 371 determines that the last character of the base characters is a character other than the predetermined character indicating the end of the sentence (step S14; No), the CPU 371 displays the subtitle information stored in the buffer 35 at “standard playback speed”. The video information and audio information stored in the buffer 35 are reproduced at the “reproduction speed for delay” and output to the video output unit 36a and the audio output unit 36b (step S16). .

  Next, the CPU 371 executes the detection program 373a to determine whether or not caption end information is detected from the TV broadcast signal received by the tuner 31 (step S17).

  If it is determined in step S17 that caption end information has not been detected (step S17; No), the CPU 371 repeats the processing from step S13.

  On the other hand, if it is determined in step S17 that the caption end information has been detected (step S17; Yes), the CPU 371 turns off the time shift mode (step S18) and changes the display screen G of the video output unit 36a to the caption display screen G1. And the split display for splitting and displaying the video display screen G2.

  Next, the CPU 371 calculates the delay time of the video information and the audio information generated during the time shift mode turned on in step S12 and turned off in step S18, and the video information and audio information stored in the buffer 35 are calculated. The video information and audio information corresponding to the delay time are deleted, and the video information and audio information ahead of the delay time are reproduced and output to the video output unit 36a and the audio output unit 36b (step S33). Exit.

According to the caption broadcast display system 1 and the broadcast receiver 30 of the present invention described above, the caption broadcast display system 1 includes a broadcast transmitter 10 that transmits a TV broadcast signal, and a TV broadcast signal that is transmitted by the broadcast transmitter 10. The broadcast receiving device 30 includes a subtitle start information indicating the start of subtitles and a subtitle end information indicating the end of the subtitles transmitted by the transmission unit 12 of the broadcast transmission device 10. A tuner 31 that receives a TV broadcast signal including information, video information, and audio information; and subtitle start information, subtitle end information, and the like from subtitle information included in the TV broadcast signal received by the tuner 31. The CPU 371 executing the detection program 373a for detecting the subtitle information and the video information included in the TV broadcast signal received by the tuner 31 It causes outputs to the force section 36a, includes with the TV audio information included in the broadcast signal and executes the output control program 373b for outputting the audio output unit 36b CPU 371, a.
Then, the CPU 371 executing the output control program 373b detects characters based on the subtitle information displayed on one screen until the subtitle end information is detected after the subtitle start information is detected by the CPU 371 executing the detection program 373a. When the number of characters exceeds a predetermined threshold, that is, when the subtitles displayed on one screen are long, or the last character of the characters based on the subtitle information displayed on one screen indicates the end of the sentence In the case of a character other than a predetermined character, that is, when one or a plurality of sentences constituting a subtitle is long, video information and audio information may be delayed with respect to the subtitle information and output. it can.
Therefore, it is possible to easily correct the difference between the subtitle and the video or audio.

In addition, the CPU 371 that has executed the output control program 373b displays the display screen G of the video output unit 36a from the caption display until the caption end information is detected by the CPU 371 that has executed the detection program 373a. The screen information can be divided into a screen G1 and a video display screen G2, and the subtitle information can be output from the subtitle display screen G1, and the video information can be output from the video display screen G2.
Accordingly, it is possible to easily display the caption information without performing troublesome processing such as combining and superimposing the caption information on the video information and outputting it.

In addition, the CPU 371 that has executed the output control program 373b determines the delay time of the video information and audio information that has occurred between the detection of the caption start information and the detection of the caption end information by the CPU 371 that has executed the detection program 373a. It is possible to calculate and output video information and audio information ahead of the delay time at a predetermined timing.
Therefore, by outputting substantially real-time video information and audio information at a predetermined timing, the delay of video information and audio information that occurs between the detection of subtitle start information and the detection of subtitle end information is eliminated. It is easy to use.

  The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist thereof.

The CPU 371 executes the output control program 373b and outputs video information and audio information for the subtitle information so that, for example, video information and audio information suitable for the subtitle information are output when the subtitle start information is detected. The output timing may be delayed.
In this case, the deviation between the subtitle and the video or audio can be more reliably corrected.

  While the time shift mode is ON, the CPU 371 divides the display screen G of the video output unit 36a into the subtitle display screen G1 and the video display screen G2. However, the display screen G does not necessarily need to be divided. . In this case, it is necessary to synthesize and superimpose caption information on video information and display it on the display screen G.

  In addition, when a predetermined condition is satisfied, the number of characters based on subtitle information displayed on one screen exceeds a predetermined threshold, or the last of characters based on subtitle information displayed on one screen is displayed. Not only when the character is a character other than the predetermined character indicating the end of the sentence, but in order to output the video information and the audio information substantially matching the subtitle information, the video information and the audio information are “delayed playback speed”. It is optional if it is necessary to reproduce and output with

  Further, the predetermined timing is not limited to the time when the caption end information is detected, but may be the time when the main broadcast is switched to the commercial broadcast, the time when one program is switched to another program, or the like.

It is a block diagram which shows the functional structure of a caption broadcast display system. It is a block diagram which shows the functional structure of the broadcast transmission apparatus of FIG. It is a block diagram which shows the functional structure of the broadcast receiving apparatus of FIG. It is a figure for demonstrating the display screen of the video output part divided | segmented into the subtitle display screen and the video display screen. It is a figure for demonstrating the output method of subtitle information and video information and audio | voice information. It is a flowchart for demonstrating the process at the time shift mode ON by the broadcast receiver with which a caption broadcast display system is provided.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Subtitle broadcast display system 10 Broadcast transmission apparatus 12 Transmission part (transmission means)
30 Broadcast receiver 31 Tuner (Receiving means)
36a Video output unit (video output means)
371 CPU (detection means, output control means)
373a Detection program (detection means)
373b Output control program (output control means)
G display screen G1 subtitle display screen G2 video display screen

Claims (6)

In a caption broadcast display system comprising: a broadcast transmitter that transmits a television broadcast signal; and a broadcast receiver that receives a television broadcast signal transmitted by the broadcast transmitter.
The broadcast transmitting device is:
Transmission means for transmitting a television broadcast signal including subtitle information having subtitle start information indicating the start of subtitles and subtitle end information indicating the end of subtitles, and video information,
The broadcast receiving device is:
Receiving means for receiving a television broadcast signal transmitted by the transmitting means;
Detecting means for detecting the caption start information and the caption end information from the caption information included in the television broadcast signal received by the receiving means;
Output control means for causing the video output means to output subtitle information and video information included in the television broadcast signal received by the receiving means,
The output control means includes
The display screen of the video output means is divided into a subtitle display screen and a video display screen from when the subtitle start information is detected by the detection means until the subtitle end information is detected, and the subtitle information is divided into the subtitle information. Output from the display screen, output the video information from the video display screen,
When the number of characters based on the subtitle information displayed on one screen exceeds a predetermined threshold from when the subtitle start information is detected by the detecting means to when subtitle end information is detected, or one screen If the last character of the character based on the subtitle information to be displayed is a character other than the predetermined character indicating the end of a sentence, the said caption information is output in the standard reproduction speed, the standard the video information Output at a slower playback speed than the playback speed ,
A delay time of the video information generated between detection of subtitle start information and detection of subtitle end information by the detecting means is calculated, and the video information ahead of the delay time is calculated at a predetermined timing. A subtitle broadcast display system characterized by output. Receiving means for receiving a television broadcast signal including subtitle information including subtitle start information indicating the start of the subtitle and subtitle end information indicating the end of the subtitle, and video information;
Detecting means for detecting the caption start information and the caption end information from the caption information included in the television broadcast signal received by the receiving means;
Output control means for causing the video output means to output subtitle information and video information included in the television broadcast signal received by the receiving means;
With
The output control means causes the subtitle information to be output at a standard reproduction speed when a predetermined condition is satisfied from when the subtitle start information is detected by the detection means until the subtitle end information is detected. A broadcast receiving apparatus, wherein video information is output at a reproduction speed for delay which is slower than the standard reproduction speed . The broadcast receiving device according to claim 2,
The output control unit divides the display screen of the video output unit into a subtitle display screen and a video display screen until the subtitle end information is detected after the detection unit detects subtitle start information, A broadcast receiving apparatus, wherein the subtitle information is output from the subtitle display screen and the video information is output from the video display screen. In the broadcast receiving device according to claim 2 or 3,
The case where the predetermined condition is satisfied is a case where the number of characters based on the caption information displayed on one screen exceeds a predetermined threshold. In the broadcast receiving device according to claim 2 or 3,
The case where the predetermined condition is satisfied is a case where the last character of the characters based on the caption information displayed on one screen is a character other than the predetermined character indicating the end of the sentence, Broadcast receiving device. In the broadcast receiving device according to any one of claims 2 to 5,
The output control means calculates a delay time of the video information generated between the detection of the caption start information by the detection means and the detection of the caption end information, and at a predetermined timing, the delay time A broadcast receiving apparatus that outputs the video information.

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