JP2005303879A - Digital broadcasting system and digital broadcasting adapted receiving terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a viewer, the reading-speed force and hearing ability of which are lowered, such as the aged is difficult to understand contents such as a voice at a fast speaking speed. <P>SOLUTION: In a digital broadcasting, a plurality of kinds of voice information can be broadcasted, and a voice data in which a voice speed is converted are contained in at least one kind in the voice information. The data of the selection and outputs of images and the voice data and program information are selected and gained from a transport stream for the digital broadcasting, and the voice data in which the voice speed is converted can be decoded in response to a program-information "genre" transmitted by the broadcasting by previously setting a user. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

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

A configuration example of a conventional television receiver is shown in FIG. A conventional television receiver will be described below with reference to FIG. FIG. 8 is a block diagram of a conventional television receiver.
Here, the configuration of an embodiment provided with an elderly support function that reproduces images and sounds suitable for the visual characteristics and auditory characteristics of the elderly will be described.

  101 is a tuner unit, 102 is a video demodulation unit, 103 is a luminance control unit, 104 is a teletext decoding unit, 105 is a process unit, 106 is an image display unit, 107 is a speech speed conversion unit, 108 is an audio reproduction unit, and 109 is It is a conversion speed setting unit.

  The broadcast wave signal TS undergoes a predetermined demodulation process in the tuner unit 101 to demodulate the baseband video signal SV and the audio signal SA.

  One of the video signals SV is subjected to predetermined demodulation processing, that is, separation of the luminance signal and the carrier color signal and demodulation of the carrier color signal by the video demodulator 102, and the luminance signal SY and the color difference signal SC are demodulated.

  The luminance control unit 103 performs luminance control processing for changing the luminance signal level nonlinearly according to the average luminance level of the luminance signal SY when the control signal SPC is in the assisted reproduction mode. Get the signal that made the picture making operation. On the other hand, in the standard reproduction mode, the input signal is output as it is.

  The teletext decoding unit 104 decodes the pattern information SM by performing a data broadcast decoding process such as teletext broadcasting that is multiplexed and transmitted on the video signal SV. The control signal SPC performs a predetermined decoding process in the standard reproduction mode. On the other hand, in the assisted playback mode, in addition to a predetermined decoding process, a process for changing a character size smaller than a threshold to a larger character size is performed. Then, the character size pattern information that is easy for the elderly to see is decoded.

  The processing unit 105 performs image quality improvement signal processing such as contour enhancement and noise removal and conversion processing to the three primary color RGB signals, and outputs a signal SD of the three primary color signal system. Then, the image display unit 6 reproduces the image.

    The speech signal SA is subjected to speech rate conversion signal processing in which the speech rate conversion unit 107 converts the generated speech into a rate that is easy to hear. When the control signal SPC is in the standard reproduction mode, the input signal SA is output as it is to the output signal SA ′. On the other hand, in the assisted playback mode, speech speed conversion signal processing is performed to convert the generated speech to a speed that is easy to hear at a speed determined by the conversion speed information included in the control signal SPC. Then, the audio reproduction unit 108 reproduces this signal.

The conversion speed setting unit 109 selects a standard playback mode and a support playback mode and sets the speed of speech speed conversion. This function is realized, for example, by operating an elderly person support button provided on the remote control terminal.
JP-A-9-247563

  The audio display of a conventional television receiver is configured to be easy to hear for elderly people or the like by subjecting the normal sound of the broadcast wave to speed conversion processing on the receiver side.

  Also, normal speed voice or voice speed converted voice converted by the user setting is selected and output, and switching between standard playback mode and support playback mode is also operated by user instructions. Did not switch adaptively.

  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.

  In addition, the program information includes information that can determine that the audio data converted from the audio speed is being broadcast.

  Also, a tuner capable of receiving digital broadcasting, a demodulating means for selecting a desired transport stream from the tuner output, video and audio data selection and output from the transport stream output from the demodulating means, and program information data A transport decoding means for selecting and obtaining the data, a RAM memory for developing and storing program information data, a video decoding means capable of decoding the video data obtained by the transport decoding means, and a transport decoding means. An audio decoding means capable of decoding the acquired audio data, and a control means for controlling the demodulation means, the transport decoding means, the video decoding means, and the audio decoding means. Change the audio speed according to the program information sent. The voice data was capable of decoding.

  In addition, when the program information contains information that can be used to determine that audio data with the same structure as above converted audio speed is being broadcast, the audio data converted automatically can be selected and decoded. It was.

  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.

  Also, since the program information includes information that can determine that the audio data converted from the audio speed is being broadcast, the audio data is automatically converted according to the program information sent by broadcasting. Can be selected and decoded.

(Embodiment 1)
The most important feature of the present invention is that it can transmit sound whose speed has been converted by a broadcast wave and can display sound whose speed has been converted by a user's instruction on the receiving terminal side. The purpose of making all information available to elderly people who feel that normal voice is fast is realized by the broadcasting and receiving terminal device of the present invention.

  The first embodiment of the digital broadcast apparatus according to the present invention will be described below with reference to FIGS. 1, 2, 3, 4, 5, and 6. FIG. Here, as an example, digital TV broadcasting in Japan is described.

  In FIG. 1, 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, and 23 22 is a second audio encoder that can input a signal obtained by converting the speed of the audio input to the audio signal, and that can encode the audio signal subjected to the speed conversion into an MPEG signal; 24, a program information generating device that generates and outputs program information; 25 Is a multiplexing device that can multiplex the outputs from the devices 21 to 24 and output as a transport stream, 26 is a modulation means that can be modulated to a modulation system defined as a broadcasting system, and 27 is from the modulation means 26 Radio wave transmitting means capable of uplinking the output of the output to the transmitting antenna, 28 is an output terminal to the transmitting antenna.

  The operation of the digital broadcasting apparatus of FIG. 1 configured as described above will be described below. The operation is shown as a flowchart in FIG.

  In digital television broadcasting, data information such as video, audio, and program information 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.

  Also, program arrangement information such as PAT (Program Association Table) and PMT (Program Map Table) is generated, and program information such as program contents, genre, broadcast time, and pay program is generated and output by the program information generating device 24. . In normal broadcasting, broadcast signals are created and transmitted using the above three devices. Further, the second audio encoder 23 inputs an audio material obtained by speed-converting the audio material input to the first audio encoder 22, and encodes and outputs it as an MPEG2 audio stream.

  The multiplexing device 25 multiplexes the output streams of the video encoder 21, the first audio encoder 22, the second audio encoder 23, and the program information generation device 24 as an MPEG2 system and outputs it to the modulation means 26.

  The modulation means 26 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 performs uplink to the transmission antenna and transmits it as a broadcast wave.

  In order to broadcast the audio having undergone the audio speed conversion, the broadcasting apparatus system is configured by the second audio encoder 23 in addition to the broadcasting apparatus configured by the video encoder 21 and the first audio encoder 22. 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. The receiver performs decoding for each of these units. In the MPEG stream, a plurality of sounds can be multiplexed on the Audio Data in the AAU, and normal sounds and speed-converted sounds can be multiplexed and transmitted as a broadcast.

  Next, an example of the form of the digital broadcast receiving terminal device of the present invention will be described. The broadcast content here is a case where the above-mentioned video, normal sound, speed-converted sound, and program information are multiplexed.

  1 is an antenna signal input terminal, 2 is a digital tuner for selecting a broadcast signal received at the antenna signal input terminal 1, and 3 is a demodulating means for demodulating in accordance with the broadcast system of the signal selected by the digital tuner. 4 is a transport decoding means capable of selecting packet ID selection, synchronous reproduction, 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, 6 is an audio decoding means capable of decoding the audio stream packet from the transport decoding means 4, 7 is a demodulation means 3, transport decoding means 4, video decoding means 5, audio decoding means 6, RAM memory 8, program ROM 9, CPU for controlling the nonvolatile memory 10 8 is a RAM memory for developing / accumulating subtitle information data and OSD video information, 9 is a non-volatile memory capable of storing a program for performing control and function execution of the receiving terminal device, and 10 is a speed converted by the user A non-volatile memory capable of storing a program genre for viewing audio, 11 is an output terminal of the video decoding means 5, 12 is an output terminal of the audio decoding means 6, and 13 is a remote control input terminal capable of receiving an operation instruction from the user. .

  The operation of the digital broadcast receiving terminal device of FIG. 1 configured as described above will be described below.

  The program ROM 9 stores a program for controlling the receiving terminal device and executing functions, and the control means 7 reads the program stored in the program ROM 9 and controls each means based on this program. .

  Broadcast signals received by the antenna are input from the antenna signal input terminal 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 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 at least one 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 control means 7 recognizes a signal from the remote control input terminal 13 that can receive an operation instruction from the user, presets the program genre shown in FIG. 3, FIG. 4 and FIG. Store in the memory 10.

  FIG. 3 shows the content descriptor of the Japanese PSI / SI operation rules. This describes information about the genre of the program (event). FIG. 4 and FIG. 5 describe information related to the genre large classification (content_nibble_level_1) and the medium genre classification (content_nibble_level_2) of the content descriptor. The user stores his / her favorite genre in the receiver in advance, and the control means 7 compares and judges whether or not the program being viewed is the favorite genre. Acquired and transferred to the audio decoding means 6. If they do not match, normal speed audio is acquired and transferred to the audio decoding means 6.

  The audio decoding means 6 decodes the input audio stream and outputs it to the audio output terminal 11.

  As a result, when elderly users are difficult to hear through high-speed audio broadcasts on TV, it is difficult to understand the content. Information can be easily acquired. In addition, the program genre to be converted into audio speed can be set in advance, and only the favorite program can be converted into audio speed.

(Embodiment 2)
Next, a second embodiment of the digital broadcast receiving terminal device of the present invention will be described. Here, description will be made with reference to FIGS. 1, 2, 3, 4, 5, and 7. In addition, about the same structure as 1st Embodiment mentioned above, the same code | symbol is used and description is abbreviate | omitted. The broadcast content here is a case where the above-mentioned video, normal sound, speed-converted sound, and program information are multiplexed. The operation will be described below.

  FIG. 7 shows a flowchart of the second embodiment. Also, here, broadcast waves are broadcast by adding “audio speed conversion program” to the genre classification shown in FIG. Any portion may be used as long as it is not defined, but for example, the category is set to the middle category “0x7” of “Welfare” in the major category.

  On the receiving device side, the content descriptor developed on the RAM 8 is judged by the control means 7, and if the program genre of the viewing program is “audio speed conversion program”, the speed conversion audio information is acquired by the transport decoding means 4. Then, it is transferred to the audio decoding means 6, otherwise normal speed audio is acquired and transferred to the audio decoding means 6. The audio decoding means 6 decodes the input audio stream and outputs it to the audio output terminal 11.

  By adding the genre content in the program information, it is possible to perform speed-converted audio broadcasting for problems that are difficult to understand when elderly users etc. are difficult to hear with fast audio broadcasting on TV broadcasting Therefore, it is possible to easily acquire voice information such as elderly people whose hearing has fallen. In addition, the broadcast station can change the audio speed of the program that the viewer wants to listen to slowly with the converted audio.

  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 on a television broadcast, it is difficult to understand the content. It has the effect of facilitating the acquisition of audio information such as elderly people, and is useful in the field of digital broadcasting aiming at broadcasting that is friendly to elderly people and persons with disabilities.

Further, since it is possible to automatically switch between normal audio speed and speed-converted audio according to the program genre set in advance by the user, it is useful when it is difficult to hear in broadcasting with high audio.
In addition, by adding a content descriptor that can be recognized as an audio speed conversion program to the program genre in the broadcast wave, it is possible to automatically switch between normal audio speed and speed conversion audio, so that the broadcast station can speed It is useful for making it easy to hear a program that is desired to be slowly listened to with the converted voice and that can be converted into a voice speed.

The figure which shows the structure of the digital broadcasting apparatus of this invention, and a receiving terminal device The figure for demonstrating the data structure of an MPEG audio bit stream ARIB TR-B14 Volume 4 Digital Terrestrial Television Broadcasting Diagram for explaining PSI / SI operation specification content descriptors The figure which shows the genre large classification and middle classification of the content descriptor The figure which shows the genre large classification and middle classification of the content descriptor Operation flowchart of Embodiment 1 of the present invention Operation flowchart of Embodiment 2 of the present invention Conventional TV broadcast receiver configuration diagram

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 Non-volatile memory for programs 10 Non-volatile memory for storing user information 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 Program information generator 25 Multiplexer 26 Modulator 27 Radio wave sending means 28 Sending antenna input terminal 101 Tuner 102 Video demodulator 103 Luminance control unit 104 Character broadcast decoding unit 105 Process unit 106 Image display unit 107 Speech rate conversion unit 108 Audio playback unit 109 Conversion speed setting unit

Claims (3)

A tuner capable of receiving a digital broadcast; a demodulator that selects a desired transport stream from the tuner output; and audio data selection, output, and program information data selection from the transport stream output from the demodulator; Transport decoding means for performing acquisition, RAM memory for developing and storing the program information data, nonvolatile memory capable of storing contents set in advance by the user, and audio data acquired by the transport decoding means And a control means for controlling the demodulating means, the transport decoding means, and the audio decoding means, and according to program information sent in advance by a user setting, the audio speed Digital data that can be decoded Le broadcasting receiving terminal apparatus. In digital broadcasting that can transmit broadcast data composed of video information, audio information, text information, etc., it is possible to broadcast multiple types of audio information, of which at least one type includes audio data with converted audio speed A digital broadcasting system characterized in that program information includes information capable of determining that the audio data converted from the audio speed is being broadcast. The receiving terminal apparatus according to claim 1 automatically converts the audio speed when the program information includes information that can determine that the audio data obtained by converting the audio speed according to claim 2 is being broadcast. The receiving terminal device for digital broadcasting according to claim 1, wherein the receiving device can select and decode audio data.

Images