JP2005057638A - Digital broadcasting device and reception terminal device corresponding to digital broadcasting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that it is difficult for TV viewers whose sight, quick reading ability and hearing ability have deteriorated, such as the elderly, to understand the contents of characters quickly displayed or speeches rapidly spoken when acquiring speech and subtitle character information. <P>SOLUTION: A digital broadcasting device is constituted of a digital broadcasting transmission device 50 and a reception device 60 for reception of broadcasting. The digital broadcasting transmission device 50 can broadcast a plurality of kinds of speech information and includes speech data having a speech speed converted in at least one of the plurality of kinds of speech information, can broadcast a plurality of kinds of subtitle information and can include subtitle data having a subtitle display speed converted in at least one of the plurality of kinds of subtitle information. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a digital signal processing apparatus, and more particularly to a receiving terminal apparatus that performs digital broadcast signal processing and data signal processing.

  In recent years, functions of television receivers have been diversified, and those that perform various operations are known. For example, what is described in Patent Document 1 is an example, and a conventional broadcast receiving apparatus will be described with reference to the drawings. FIG. 7 shows an example of the configuration of a conventional television receiver, and an operation example thereof is shown in FIG. Here, “television TV for the elderly” will be described. A conventional broadcast receiving apparatus will be described below with reference to FIGS.

  FIG. 7 is a block diagram of a conventional broadcast receiving apparatus. Here, the configuration of an embodiment that reads out a television telop for elderly people will be described. Reference numeral 101 denotes a television body, which is a channel selection / demodulation unit that receives and demodulates a television signal to extract a video signal and an audio signal, a remote control unit that receives and demodulates a remote control signal, and the supplied video signal and itself A video switching unit (11b) for switching and displaying the video signal demodulated in step (b), a voice switching unit (11a) for switching and outputting the supplied audio signal and the audio signal demodulated by itself, and outputting the audio A speaker unit and a display unit for displaying an image are included.

  Reference numeral 102 denotes a support device, which is included in a decoding unit (122) that decodes a demodulated remote control signal code, an image memory unit (123) that stores a television video signal in units of frames, and a television video signal. A character recognition unit (121) for recognizing a telop character, a phrase extraction unit (133) for extracting a telop phrase based on the recognized character, and a sentence generation unit for generating a sentence with a pause inserted between the phrases (126), a speech speed adjustment unit (134) that adjusts the reading speed of the generated sentence, a voice synthesis unit (125) that synthesizes the sentence with the adjusted reading speed and converts it into a voice signal, And a control unit (136) for controlling. The actual device configuration is that the video switching unit (11b) and the audio switching unit (11a) are provided on the TV main body 101 side, while the image memory unit (123), the character recognition unit (121), and the phrase extraction are provided. A unit (133), a sentence generation unit (126), a speech speed adjustment unit (134), a speech synthesis unit (125), and a control unit (136) are provided on the support device side. The TV main body 101 and the support device can be configured separately by being configured in a unit or substrate form and being attached to and detached from a connector provided on the TV main body 101.

  The operation of the embodiment that reads out the television telop for elderly people according to the conventional example will be described with reference to FIGS. FIG. 8 is an explanatory view showing a method for reading out a telop of a television for elderly people according to the present invention, which is a screen (a) showing an example of the telop and a generated sentence example (b). The demodulated television video signal is stored in the image memory unit (123) in units of frames at a required period, for example, a one second period. The character recognition unit (121) recognizes the telop characters included in the video signal of the television stored in the image memory unit (123). As an example, the telop “◯◯ city” shown in FIG. Recognize one character at a time from "Earthquake in the center ..."

  The phrase extraction unit (133) extracts a telop phrase, for example, “XX city”, “center”, “earthquake”,... Based on the recognized characters. The sentence generation unit (26) generates a sentence with a pause inserted between the phrases. For example, as shown in (a) of FIG. 8B, a sentence in which a pause “·” is inserted between phrases is generated.

  The speech speed adjustment unit (134) adjusts the reading speed of the generated sentence, reads out the sentence at a rate of two characters per second, for example, and supplies it to the voice synthesis unit (125). 125) generates a speech signal by synthesizing speech based on the supplied text with the read speed adjusted, and supplies the speech signal to the speech switching unit (11a) connected to the next stage. The audio switching unit (11a) switches between the supplied audio signal and the TV audio signal demodulated by itself and outputs it to the speaker unit. Further, as shown in FIG. 7, according to the embodiment in which the memory unit (135) is added to the above-described configuration, the sentence generated by the sentence generation unit (126) is stored in the memory unit (135). It is possible to realize a method of storing and storing the information repeatedly and appropriately, so that the news content can be transmitted more reliably. Other detailed operations for generating a sentence for the above-described sentence generation unit (126) will be described below.

  As shown in (a), (b), and (c) of FIG. 8B, the sentence generator (126) not only limits the pause (in the figure, “•”) to one type, Insert pauses of arbitrary length at intervals of 10 milliseconds. Also, chime sound data (“☆” in the figure) is added to the head of the sentence. The voice synthesis unit (125) synthesizes a chime sound having an arbitrary frequency, for example, 400 Hz and 800 Hz.

  Further, as shown in FIG. 7, according to the embodiment in which the first storage unit (131) for registering a phrase and the determination unit (127) for determining a phrase are added to the above-described configuration. The part (127) discriminates an important word / phrase in the telop, and based on the discrimination result, the sentence generation part (126) generates a sentence in which the important word / phrase is repeated. For example, as shown in (b) of FIG. 8B, “earthquake” is registered in the first storage unit (131), and the discrimination unit (127) discriminates the important phrase “earthquake” in the telop. Based on the results, the content of the news can be transmitted more reliably by generating sentences that repeat the “earthquake”.

  Further, the discrimination unit (127) discriminates the sentence end phrase in the telop, and based on the discrimination result, the sentence generation unit (126) can generate a sentence without the telop sentence end phrase. For example, as shown in (c) of FIG. 8 (b), end sentence phrases such as “I did” and “I did” are associated and registered in the first storage unit (131), and the sentence generation unit (126) It is possible to generate a sentence in which a sentence ending phrase such as “I did” is omitted. Further, the discriminating unit (127) discriminates the sentence end phrase “I did” in the telop, and based on the discrimination result, the sentence generation unit replaces the sentence in which the telop sentence end phrase is replaced with another short sentence end phrase “Done”. You may make it produce | generate ((d) of FIG.8 (b)).

  By realizing these functions, it is possible to shorten the reading time of the text. Therefore, when the telop covers a plurality of pages, it is possible to easily synchronize the telop display on the screen with the reading. Further, as shown in FIG. 7, according to the embodiment in which the on-screen unit (124) is added to the above-described configuration, the on-screen unit (124) is based on the generated text. Video signal is generated and supplied to the video switching unit (11b). Accordingly, it is possible to freely display the screen in a form that is easy to understand, such as displaying a fixed-form telop such as a broadcast news bulletin in large characters or displaying important words repeatedly.

As described above, the conventional broadcast receiver described above recognizes characters from the telop displayed on the video, converts the display speed, and converts the audio speed in synchronization with the telop display. It was.
JP 2000-69390 A (FIG. 1)

  When viewers obtain text information in a conventional broadcast receiver, viewers with reduced vision or reading ability such as elderly people have difficulty in understanding the content when the text display speed is fast. However, the problem is solved by analyzing the character information of the image frame and changing the display speed of a specific character. However, since the audio data and subtitle (telop) data subjected to speed conversion are not sent in the analog broadcast signal, it is necessary to capture the image once by the receiver and perform processing from recognition, decoding, and display adjustment. Therefore, it is necessary to add a memory for capture, a circuit for recognition and decoding, and the circuit scale has been increased. Further, since only the voice reading speed conversion of the voice guidance in the telop part is not provided as a function, it is impossible to convert the speed of the voice of the broadcast program itself.

  In order to solve this problem, the present invention is capable of broadcasting a plurality of types of audio information in digital broadcasting capable of transmitting broadcast data composed of video information, audio information, text information, etc., and at least one of them is broadcast. Added audio data converted voice speed to type.

  Also, it is possible to broadcast a plurality of types of subtitle information in digital broadcasting, and at least one type of subtitle information includes subtitle data obtained by converting the subtitle display speed.

  Also, a tuner capable of receiving digital broadcasting, a demodulating unit for selecting a desired transport stream from the tuner output, and selection and output of video and audio data from the transport stream output from the demodulating unit, and subtitle information data A transport decoding means for selecting and obtaining the data, a RAM memory for developing and storing subtitle information data, a video decoding means capable of decoding the video data obtained by the transport decoding means, and a transport decoding means. Audio decoding means capable of decoding the acquired audio data, video synthesizing means capable of synthesizing the output of the video decoding means and decoded subtitle data, the demodulation means, the transport decoding means, the video decoding means, Control of the audio decoding means and the video synthesizing means Constituted by control means for the audio data obtained by converting the sound speed transmitted by broadcast by a user of the selective decodable, it was capable of converting subtitles speed to match the voice and speed conversion.

  In the same configuration as above, when subtitle data whose display speed has been converted is also sent together with the data whose audio speed has been converted, subtitles are also displayed when the user selects to display the audio data whose audio speed has been converted. It was made possible to automatically select the speed converted data. On the other hand, when the user selects to display the data with the converted subtitle display speed, the audio display can automatically select, decode and display the speed converted data.

  As described above, according to the present invention, a plurality of types of audio information can be broadcast in a digital broadcast capable of transmitting broadcast data composed of video information, audio information, character information, etc., and at least one of them can be broadcast. If voice data with converted voice speed is included, it may be difficult to understand the contents of elderly users, etc., with high-speed voice broadcasting. In addition, voice information can be easily obtained for elderly people who have lost their hearing.

  In addition, it is possible to broadcast multiple types of caption information in digital broadcasting that can transmit broadcast data composed of video information, audio information, text information, etc., and the caption display speed is converted to at least one of them. By including subtitle data, elderly users, etc., perform subtitle broadcasting that has been speed-converted to the problem that it is difficult to understand the content because it has moved to the next display without being able to read with subtitles displayed at high speed As a result, it is possible to easily obtain subtitle information such as elderly people with low vision.

  In addition, a tuner capable of receiving digital broadcasting, a demodulating unit that selects a desired transport stream from the tuner output, and selection and output of video and audio data from the transport stream output from the demodulating unit, and subtitle information Transport decoding means for selecting and acquiring data; RAM memory for expanding and storing the data of the caption information; video decoding means capable of decoding video data acquired by the transport decoding means; Audio decoding means capable of decoding the audio data acquired by the port decoding means, video synthesizing means capable of synthesizing the output of the video decoding means and decoded subtitle data, the demodulation means, the transport decoding means, The video decoding means, the audio decoding means, By providing the control means for controlling the video synthesizing means, it is possible to decode the audio data converted from the audio speed sent by broadcast according to the user's selection, and the subtitle speed can be converted according to the speed converted audio Become.

  In addition, when the subtitle data having the same configuration as the receiving terminal device and the display speed converted is also sent together with the data converted from the audio speed, the user selects to display the audio data converted from the audio speed. When subtitles are displayed, the speed-converted data can be automatically selected.

  In addition, when the subtitle data having the same configuration as that of the receiving terminal device and the subtitle data whose display speed is converted is also transmitted together with the data whose audio speed is converted, the user selects to display the data whose subtitle display speed is converted. In some cases, the voice display can automatically select and decode the speed-converted data.

  The most important feature of the present invention is that it can transmit voice and subtitles that have been speed-converted by broadcast waves, and can display voice and subtitles that have been speed-converted by the support of the user on the receiving terminal side. The purpose of making all information available to elderly people who feel normal voice and subtitle display speed is high is realized by the broadcasting and receiving terminal device of the present invention.

(Embodiment 1)
A first embodiment of a digital broadcasting apparatus according to the present invention will be described below with reference to FIGS. Here, digital television broadcasting is described as an example.

  In FIG. 1, 50 is a device for transmitting digital broadcasts, and 60 is a receiving terminal for receiving digital broadcasts. A digital broadcast system receives a signal output from the digital broadcast device 50 by a digital broadcast receiving terminal 60, performs signal processing and displays the signal on a display device, and the digital broadcast device 50 is mainly provided in a television station. At home, a digital broadcast transmitted from a television station is received by the digital broadcast receiving terminal 60. As an example, the digital broadcast receiving terminal 60 may be a home television receiver, or a computer capable of receiving digital broadcasting, a portable receiving terminal, or a mobile phone.

  The digital broadcasting device 50 has the following configuration. 21 is a video encoder that can input a video signal and can encode the video signal into an MPEG signal. 22 is a first audio encoder that can input an audio signal and can encode the audio signal into an MPEG signal. A second audio encoder capable of inputting a speed-converted audio signal and encoding the speed-converted audio signal into an MPEG signal, and 24 is a subtitle data that can generate subtitle data synchronized with the audio output of 22 audio encoders. One subtitle data generating device, 25 is a second subtitle data generating device capable of generating subtitle data synchronized with 23 audio encoder outputs, and 26 is a transport stream by multiplexing outputs from 21 to 25 devices. Multiplexer capable of output; 27, modulation means capable of modulating to a modulation system defined as a broadcast system; Uplink possible wave transmission means sends the antenna outputs from 27, 29 are output terminals to the sending antenna.

  The operation of the digital broadcasting apparatus 50 of FIG. 1 configured as described above will be described below.

  In digital television broadcasting, data information such as video, audio, and subtitles is created by a broadcasting device. As a video signal, a video material such as a video tape or a digital camera is input to the video encoder 21, and the signal is encoded and output as an MPEG2 video stream. As for the audio signal, the audio material is input to the audio encoder 22 like the video, and the signal is encoded and output as an MPEG2 audio stream. Further, a data broadcast such as a caption broadcast is generated by the caption data creation device 24 and output as a signal synchronized with video and audio. A normal broadcast uses the above three devices, the video encoder 21, the audio encoder 22, and the caption data creation device 24, to create and send a broadcast signal.

  The digital broadcasting device 50 according to the present embodiment further includes a second audio encoder 23. In the second audio encoder 23, audio material obtained by speed-converting the audio material input to the first audio encoder 22 is input, encoded as an MPEG2 audio stream, and output. Subtitle data synchronized with the audio material input to the second audio encoder is generated by the second subtitle data creation device 25 and output as a signal synchronized with the speed-converted audio.

  The multiplexing device 26 multiplexes the output streams of the video encoder 21, the first audio encoder 22, the second audio encoder 23, the first caption data creation device 24, and the second caption creation device 25 as an MPEG2 system, Output to modulation means 27. The modulation means 27 performs modulation suitable for the broadcasting system (for example, 8PSK modulation for Japanese BS digital and CS110 digital, OFDM modulation for terrestrial digital broadcasting), and outputs a modulation signal to the radio wave transmission means 28. The radio wave transmission means 28 uplinks to the transmission antenna and transmits it as a broadcast wave. In this (Embodiment 1), a broadcasting system capable of broadcasting an audio signal whose audio speed has been converted will be described below.

  In order to broadcast the audio having undergone the audio speed conversion, a second audio encoder 23 is newly added to the broadcasting apparatus constituted by the video encoder 21 and the first audio encoder 22 to constitute a transmission apparatus system. The audio material obtained by converting the speed of the audio input to the first audio encoder is input to the second audio encoder 23 as an audio material, encoded into an MPEG signal, and output to the multiplexing device 26.

  The multiplexed audio is sent out in a stream configuration as shown in FIG. In FIG. 2, “AAU” is an abbreviation for “Audio Access Unit” and is a unit for decoding, and the receiver performs decoding for each of these units. In an MPEG stream, a plurality of sounds can be multiplexed on “Audio Data” in the AAU, and normal speed sound and speed-converted sound can be multiplexed and transmitted as a broadcast.

  According to the digital broadcasting apparatus of the present embodiment, it is possible to multiplex and send out audio signals having different speeds, and the audio speed can be selected when decoding and outputting in the receiving apparatus. For a person, it is possible to listen by changing the audio speed according to the video or audio source. In particular, when it is difficult for an elderly user to listen to a high-speed audio broadcast on a television broadcast, it is possible to easily acquire audio information by selecting a speed-converted audio broadcast that is difficult to understand the contents.

(Embodiment 2)
Next, a second embodiment of the digital broadcast apparatus of the present invention will be described. Here, description will be made with reference to FIGS. Note that the same components as those in the example described in the above (Embodiment 1) are denoted by the same reference numerals and description thereof is omitted. In this embodiment, a broadcasting system capable of broadcasting a caption signal whose caption speed has been converted will be described below.

  In order to perform subtitle speed-converted subtitle broadcasting, the second subtitle data creation device 25 includes a broadcasting device system in addition to the digital broadcasting device configured in (Embodiment 1). In the second caption data creating device 25, caption material synchronized with the sound material input to the second sound encoder 23 is created and output to the multiplexing device 26. The multiplexed subtitles are sent out with the configuration shown in FIG. (For details, refer to “ARIB STD-B24, Part 1, Part 3, Chapter 9, Transmission of Subtitles / Superimposed Characters”).

  Subtitles are usually transmitted in an independent PES format. Here, data groups, correspondence between caption data and data group identification, and caption management data are shown. The caption data is grouped according to the data group configuration, and is accommodated in an independent PES (asynchronous / synchronous) and transmitted. One caption data is composed of a maximum of 256 data groups. In the data group, the types of caption management data and caption data are identified.

  In data group identification (DGI), eight types of subtitle texts can be transmitted, and multilingual multi-language transmission such as Japanese and English can be performed. In the caption management data, information that enables time control during data reception and reproduction is transmitted. Based on these information, the receiver performs subtitle decoding and display timing control.

  Here, subtitle material synchronized with the audio material input to the second audio encoder 23 is created and multiplexed on the eight subtitle texts that can be transmitted, and the subtitle information subjected to speed conversion is transmitted by broadcasting. As a result, elderly users, etc., moved to the next display without being able to read the subtitles displayed at a high speed, and it was difficult to understand the contents. Caption information can be easily obtained for elderly people who have fallen.

(Embodiment 3)
Next, an embodiment of the digital broadcast receiving terminal device of the present invention will be described. Here, description will be made with reference to FIGS. Note that the same reference numerals are used for the same configurations as those in the above-described (Embodiment 1) and (Embodiment 2) examples, and description thereof is omitted. The broadcast content here is a case where only the above-described video, normal audio, normal subtitle, and speed-converted audio are multiplexed.

  1 is an antenna signal input terminal, 2 is a tuner that selects a broadcast signal received at the antenna signal input terminal 1, and 3 is a demodulator that demodulates in accordance with the broadcast system of the signal selected by the tuner, 4 Is a transport decoding means capable of selecting packet ID, synchronized playback and program information according to transport stream information which is broadcast data, 5 is a video decoding means capable of decoding a video stream packet from the transport decoding means 4, and 6 is Audio decoding means capable of decoding the audio stream packets from the transport decoding means 4, 7 demodulating means 3, transport decoding means 4, video decoding means 5, audio decoding means 6, video synthesizing means 10, RAM memory 8, nonvolatile memory CPU for controlling the referential memory 9, 8 is data of subtitle information A RAM memory for developing / accumulating OSD video information, 9 is a non-volatile memory capable of storing a program for controlling and executing functions of the receiving terminal device, 10 is developed by the video decoding means 5 and the control means 7, and RAM 8. Video synthesizing means capable of synthesizing decoded subtitle data, 11 an output terminal of the video synthesizing means 10, 12 an output terminal of the audio decoding means 6, and 13 a remote control input terminal capable of receiving an operation instruction from the user.

  The operation of the digital broadcast receiving terminal device 60 (hereinafter referred to as a receiving terminal) of FIG. 1 configured as described above will be described below. The non-volatile memory 9 stores a program for controlling the receiving terminal 60 and executing functions, and the control means 7 reads the program stored in the non-volatile memory 9, and based on this program, Take control. A flowchart of the operation of this embodiment is shown in FIG.

  A broadcast signal received by an antenna (not shown) is input from the antenna signal input terminal 1 and input to the tuner 2. The tuner 2 selects a desired program. The signal output from the tuner 2 is input to the demodulation means 3. The demodulating means 3 demodulates by a demodulation method corresponding to the broadcast signal sent, performs error correction processing, and outputs a transport stream to the transport decoding means 4.

  The transport decoding means 4 performs packet ID (PID) processing. It is possible to detect a match between the PID candidate set in the transport decoding means 4 and the PID extracted from the input transport stream packet, and the data format processing is performed in units of PID. Data format processing is processing for extracting data of a specified data format from a transport stream packet. In addition, in ARIB and DVB compliant broadcasting, an SI (Service Information) section is sent using a bandwidth of several Mbps. Here, a section filter condition can be registered in advance, and a section having a matching section header (each field before the section data byte) can be extracted. This SI information can always be managed by the CPU. The SI information acquired by the transport decoding unit 4 is developed and accumulated in the video stream to the video decoding unit 5, the audio stream to the audio decoding unit 6, and the RAM memory 8. The subtitle information developed on the RAM 8 is the same as that shown in FIG.

  The control means 7 recognizes the signal from the remote control input terminal 13 that can receive the operation instruction from the user, and determines whether the instruction of voice presentation is normal voice or speech speed converted voice (step 1 in FIG. 4). When selecting normal audio, the transport decoding means 4 acquires normal speed audio information and subtitle information, and transfers the audio information to the audio decoding means 6 and the subtitle information to the RAM 8 (step 2).

  The audio decoding means 6 decodes and outputs the input audio stream, acquires the subtitle information developed in the RAM 8 by the control means 7, performs decoding, and expands (step 3). The expanded subtitle information is transferred to the video synthesizing means 10, and the video synthesizing means 10 synthesizes and outputs the subtitle information based on the output of the video decoding means 5 and the display timing information sent by broadcasting (step 4).

  On the other hand, when the speech speed conversion voice is selected by the control means 7 in (Step 1), the transport decoding means 4 acquires the speech speed conversion voice information and caption information, and the voice information is sent to the voice decoding means 6 to the caption information. Is transferred to the RAM 8 (step 5). The audio decoding means 6 decodes and outputs the input audio stream, acquires the subtitle information developed in the RAM 8 by the control means 7, performs decoding, and develops it in the RAM 8 (step 6).

  Next, the expanded subtitle information is transferred to the video synthesizing means 10, which determines the output of the video decoding means 5 and the display timing information of the voice converted to speech speed by the receiver and matches it with the audio. Subtitle information is synthesized and output (step 7).

  As a result, when the user selects speech speed converted speech, the receiving terminal automatically converts the normal speed subtitle display that is sent by broadcast in synchronization with the audio, thereby reducing the hearing and visual acuity. Voice and text information can be reliably obtained by the elderly who have fallen.

  In addition, the receiving terminal 50 includes means for allowing the user to recognize that the speed modulation is being performed when the speech speed converted speech is selected. For example, the display device displays “Speaking speed conversion” on the screen. By outputting a signal for performing display, it is possible to recognize that the user is listening to an audio signal different from the source.

(Embodiment 4)
Next, another embodiment of the digital broadcast receiving terminal device of the present invention will be described. Here, description will be made with reference to FIGS. In addition, about the same structure as the example of (embodiment) mentioned above, description is abbreviate | omitted using the same code | symbol. The broadcast content here is a case where the above-mentioned video, normal audio, normal subtitle, speed-converted audio, and speed-converted subtitle are multiplexed. A flowchart of the operation of this embodiment is shown in FIG.

  The control means 7 recognizes the signal from the remote control input terminal 13 that can receive the operation instruction from the user, and determines whether the instruction of voice presentation is normal voice or speech speed converted voice (step 11 in FIG. 5). When normal speed audio is selected, the transport decoding means 4 acquires normal speed audio information and subtitle information, and the audio information is transferred to the audio decoding means 6 and the subtitle information is transferred to the RAM 8 (step 12).

  The audio decoding means 6 decodes and outputs the inputted audio stream, acquires the subtitle information developed in the RAM 8 by the control means 7, and performs decoding (step 13). The decoded subtitle information is transferred to the video synthesizing means 10, and the video synthesizing means 10 synthesizes and outputs the subtitle information based on the output of the video decoding means 5 and the normal display timing information sent by broadcast (step). 14).

  On the other hand, if the control means 7 selects speech speed converted speech in (Step 11), the transport decoding means 4 acquires speech speed converted speech information and speed-converted subtitle information. The subtitle information is transferred to the RAM 8 (step 15).

  The audio decoding means 6 decodes and outputs the input audio stream, and the control means 7 acquires and decodes the subtitle information developed in the RAM 8 (step 16). The decoded subtitle information is transferred to the video synthesizing means 10, and the video synthesizing means 10 synthesizes and outputs the subtitle information based on the output of the video decoding means 5 and the speed converted display timing information sent by broadcasting ( Step 17).

  As a result, when the user selects speech speed converted speech, the receiver automatically operates to display the speed-converted subtitle information that is sent by broadcast, so that elderly people with reduced hearing and visual acuity The voice and text information can be obtained reliably.

(Embodiment 5)
Next, a fifth embodiment of the digital broadcast receiving terminal device of the present invention will be described. Here, description will be made with reference to FIGS. Note that the same components as those described in (Embodiment 1) to (Embodiment 4) described above are denoted by the same reference numerals, and description thereof is omitted here. The broadcast content of the present embodiment is a case where the above-described video, normal audio, normal subtitle, speed-converted audio, and speed-converted subtitle are multiplexed. This operation is shown in a flowchart in FIG.

  The control means 7 recognizes the signal from the remote control input terminal 13 that can receive the operation instruction from the user, and determines whether the instruction for presenting the caption is a normal caption or a speed-converted caption (step 21). In the case of normal subtitle selection, the transport decoding means 4 acquires normal speed audio information and subtitle information, and the audio information is transferred to the audio decoding means 6 and the subtitle information is transferred to the RAM 8 (step 22).

  The audio decoding means 6 decodes and outputs the input audio stream, the subtitle information developed in the RAM 8 is acquired by the control means 7 and is decoded (step 23). The decoded subtitle information is transferred to the video synthesizing means 10, and the video synthesizing means 10 synthesizes and outputs the subtitle information based on the output of the video decoding means 5 and the normal display timing information sent by broadcasting (step 24). .

  On the other hand, when the subtitle speed-converted by the control means 7 is selected in (Step 21), the transport decoding means 4 acquires speech information for speech speed conversion and subtitle information subjected to speed conversion, and the sound information is the sound decoding means. The subtitle information is transferred to the RAM 8 (step 25).

  The audio decoding means 6 decodes and outputs the input audio stream, acquires the subtitle information developed in the RAM 8 by the control means 7, and performs decoding (step 26). The decoded subtitle information is transferred to the video synthesizing means 10, and the video synthesizing means 10 synthesizes and outputs the subtitle information based on the output of the video decoding means 5 and the speed converted display timing information sent by broadcasting. (Step 27).

  As a result, when the user selects speed conversion subtitles, the receiver automatically operates to display the speed-converted audio information that is sent by broadcast. However, it becomes possible to obtain text and voice information with certainty.

  As described above, according to the present invention, when it is difficult for an elderly user or the like to listen to a high-speed audio broadcast in a television broadcast, it is difficult to understand the content. This system has the effect of facilitating the acquisition of voice information, such as elderly people who have fallen, and is useful in the field of digital broadcasting aiming at broadcasting that is friendly to the elderly and the disabled.

  In addition, elderly users, etc. are unable to read subtitles that are displayed at high speed, but have moved on to the next display and cannot easily understand the content. It has the effect of making it easier to obtain subtitle information, such as elderly people who have fallen, and is useful in the field of digital broadcasting that aims to broadcast friendly to elderly people and people with disabilities.

  In addition, it has the effect of being able to decode the audio data converted by the user's selection and converted to the audio speed, and the subtitle speed can be converted according to the speed-converted audio, so it is difficult to hear in high-speed audio broadcasting. This is useful when the subtitles displayed at high speed cannot be read.

  In addition, when subtitle data whose display speed has been converted is also sent by broadcast together with data whose audio speed has been converted, when the user selects to display audio data whose audio speed has been converted, the subtitle display will also display the data whose speed has been converted. In the receiving terminal of the digital broadcasting field, which has the effect of being able to select automatically, the user can convert the speed of subtitles as long as the voice speed conversion instruction is instructed, and aims at broadcasting that is kind to the elderly and the disabled Useful.

  In addition, when subtitle data whose display speed has been converted is also sent by broadcast along with data whose audio speed has been converted, when the user selects to display data whose subtitle display speed has been converted, the audio display will also have the data whose speed has been converted. It has the effect of being automatically selectable and decodable, and the user can convert the speed of the audio as long as the subtitle speed conversion instruction is given. This is useful for receiving terminals in the digital broadcasting field aiming at broadcasting that is friendly to the elderly and the disabled. It is.

  As a receiving terminal, the present invention has the same effect even in a television receiver or computer in a home, or a portable display device or computer that can be carried, a mobile phone, or the like.

The figure which shows the structure of the digital broadcasting apparatus of this invention, and a receiving terminal device The figure which shows the data structure of an MPEG audio bit stream Diagram showing an example of the structure of “Transmission of caption / superimpose” by ARIB The figure which showed an example of operation | movement of this invention with the flowchart The figure which showed an example of operation | movement of this invention with the flowchart The figure which showed an example of operation | movement of this invention with the flowchart The figure which shows the structure of the conventional television broadcast receiver The figure for demonstrating the function example of the television broadcast reception

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Antenna signal input terminal 2 Tuner 3 Demodulation means 4 Transport decoding means 5 Video decoding means 6 Audio decoding means 7 Control means 8 RAM memory 9 Program nonvolatile memory 10 Video composition means 11 Video output terminal 12 Audio output terminal 13 Remote control signal Input terminal 21 Video encoder 22 First audio encoder 23 Second audio encoder 24 First subtitle data creation device 25 Second subtitle data creation device 26 Multiplexer 27 Modulator 28 Radio wave sending means 29 Sending antenna input terminal

Claims (6)

In digital broadcasting, which can transmit broadcast data composed of video information, audio information, text information, etc., it is possible to broadcast multiple types of audio information, and at least one type of audio data with converted audio speed is A digital broadcasting device characterized by being included. Capable of transmitting broadcast data composed of video information, audio information, text information, etc. In digital broadcasting, it is possible to broadcast multiple types of subtitle information, and subtitle data in which subtitle display speed is converted to at least one of them. A digital broadcasting apparatus characterized by including: A tuner capable of receiving digital broadcasting, a demodulating means for selecting a desired transport stream from the tuner output, and a video stream, audio data selection and output from the transport stream output from the demodulating means, and subtitle information data Transport decoding means for performing selection and acquisition; RAM memory for expanding / accumulating data of the caption information; Video decoding means capable of decoding video data acquired by the transport decoding means; and Transport decoding Audio decoding means capable of decoding the audio data acquired by the means, video synthesizing means capable of synthesizing the output of the video decoding means and decoded subtitle data, the demodulation means, the transport decoding means, and the video Decoding means; audio decoding means; It is provided with a control means for controlling the synthesizing means, can decode the audio data converted by the user's selection and sent by broadcast, and can convert the subtitle speed according to the speed-converted voice. Digital broadcasting compatible receiving terminal device. When subtitle data with converted display speed is sent together with data with converted audio speed, when the user selects to display audio data with converted audio speed, the subtitle display is automatically converted to speed-converted data. 4. The digital broadcast-compatible receiving terminal device according to claim 3, wherein the receiving terminal device can be selected as follows. When subtitle data with converted display speed is also sent by broadcast along with data with converted audio speed, when the user selects to display data with converted subtitle display speed, the audio display also automatically converts the speed converted data. 4. The receiving terminal device for digital broadcasting according to claim 3, wherein the receiving terminal device can be selected and decoded. 4. The digital broadcast-compatible receiving terminal device according to claim 3, wherein the output of the voice data whose voice speed is converted is displayed.

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