WO2008015753A1

WO2008015753A1 - Communication terminal apparatus and recording method

Info

Publication number: WO2008015753A1
Application number: PCT/JP2006/315431
Authority: WO
Inventors: Mutsumi Mimasu
Original assignee: Panasonic Corporation
Priority date: 2006-08-03
Filing date: 2006-08-03
Publication date: 2008-02-07

Abstract

A communication terminal apparatus wherein the recording capacity related to data broadcasts can be significantly reduced and audiovisual contents and data broadcast contents can be synchronized for reproduction without limiting the digital broadcast services. In this communication terminal apparatus (100), a packet separating part (101) separates, from a digital broadcast signal, the data broadcast contents related to a data broadcast and the audiovisual contents related to audio and video. A data broadcast content analyzing part (102) analyzes whether identification information used to identify contents among the data broadcast contents is new or not. If the identification information is new, a data broadcast content extracting part (105) extracts both the data broadcast contents and the time information indicative of a display timing for the audiovisual contents associated with the extracted data broadcast contents. A content recording part (106) records the audiovisual contents and the extracted data broadcast contents along with the time information.

Description

Specification

Communication terminal device and recording method

Technical field

TECHNICAL FIELD [0001] The present invention relates to a communication terminal device and a recording method, and more particularly to a communication terminal device and a recording method having a function of receiving, recording and reproducing terrestrial digital broadcasting.

Background art

[0002] Terrestrial digital broadcasting employs not only video and audio presentation like analog television, but also video and audio compression technology, and uses a wide transmission band to provide multimedia such as text and still images. It is possible to send data. Broadcasting toward small and highly portable devices such as mobile phones has started in Japan and South Korea, and the integration of communication and broadcasting is also possible through interactive services using the Internet. Is showing the evolution to a new broadcasting format. In particular, interactive services using data broadcasting communications are expected to be used as new services that realize the fusion of communications and broadcasting.

[0003] Further, with regard to such a recording / playback function of digital terrestrial broadcasting, special playback functions such as recording to a built-in memory and time shifting are realized.

[0004] Currently, as a recording and playback method, an RF (Radio Frequency) signal transmitted from a broadcasting station is demodulated, and a transport stream (Transport stream, hereinafter referred to as "TS") format defined by MPEG2-Systems. The recording method is adopted! (Patent Document 1).

[0005] FIG. 1 is a functional block diagram showing an overview of a conventional recording / playback process for digital terrestrial broadcasting. The PID (Packet Identification) filter unit 10 converts a digital terrestrial broadcast wave TS signal demodulated by a demodulation circuit (not shown) into PSI (Program Specification Information), ZSI (Service Information), video, audio, Filters the information and media required for playback from PCR (Program Clock Reference), data broadcasting and subtitles, and records them in the TS recording unit 11. During playback, the information recorded in the TS recording unit 11 is decoded by the digital broadcast decoding unit 12 and displayed on the display unit 13 as in viewing. Patent Document 1: Japanese Patent Laid-Open No. 2005-311760

Disclosure of the invention

Problems to be solved by the invention

[0006] By the way, data related to data broadcasting is not necessarily presented in real time and may not be recorded. On the other hand, ISDB-T (Integrated Services Digita 1 Broadcasting-Terrestrial) data broadcasting can provide services linked to video and audio, so it can be viewed in real time even when recording. As in the case, there is a large voice that wants to record information related to data broadcasting (hereinafter referred to as “data broadcasting information”), video information and audio information.

[0007] However, in the conventional recording system, the data broadcast information is a transmission format of the carousel system in which the same data is repeatedly transmitted. Therefore, the recording capacity is small! / When all the received data broadcast information is recorded, there is a problem that the recording capacity is insufficient. Therefore, when a system that does not record data broadcast information is adopted, only video information and audio information broadcasting services can be received during recording and reproduction. In other words, there is a problem that a broadcast service in which data broadcast information is linked to video information and audio information is realized only when viewing in real time, and the broadcast service is restricted during recording and playback.

[0008] An object of the present invention is to provide a communication terminal device and a recording method capable of significantly reducing the recording capacity related to data broadcasting and synchronously reproducing video / audio content and data broadcasting content without restricting digital broadcasting services. Is to provide.

Means for solving the problem

[0009] The communication terminal device according to the present invention includes a separation unit that separates data broadcast content related to data broadcast and video / audio content related to video and audio from digital broadcast signals, and identification information that identifies the content in the data broadcast content. Analyzing means for analyzing whether the data broadcast is new or not, and when the identification information is new, extract the data broadcast content and time information indicating the display timing of the data broadcast content with respect to the video / audio content. And a recording means for recording the video / audio content and the extracted data broadcast content together with the time information. The invention's effect

[0010] According to the present invention, the recording capacity related to data broadcasting is recorded by recording time information indicating the display timing for the data broadcasting content and video / audio content only when the identification information for identifying the data broadcasting content is new. The audio / video content and the data broadcasting content can be played back synchronously without restricting the digital broadcasting service.

Brief Description of Drawings

[0011] [FIG. 1] A functional block diagram showing an overview of conventional recording and playback processing of digital broadcast signals

FIG. 2 is a functional block diagram showing a configuration of a communication terminal apparatus according to Embodiment 1 of the present invention.

FIG. 3 is a diagram showing a recording example of data broadcast content according to Embodiment 1 of the present invention.

[Figure 4] Examples of bandwidth usage by media for digital broadcasting

[Figure 5] Diagram showing data transmission by data carousel method

[Figure 6] Comparison of storage capacity between the conventional recording system and the recording system of the present invention

FIG. 7 is a flowchart showing a recording operation of the communication terminal apparatus according to Embodiment 1 of the present invention. FIG. 8 is a flowchart showing a reproduction operation of the communication terminal apparatus according to Embodiment 1 of the present invention. Functional block diagram showing the configuration of the communication terminal apparatus according to the second embodiment

FIG. 10 is a flowchart showing a reproduction operation of the communication terminal apparatus according to Embodiment 2 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0013] (Embodiment 1)

FIG. 2 is a functional block diagram showing a configuration of a communication terminal apparatus capable of receiving and recording / reproducing terrestrial digital broadcast according to Embodiment 1 of the present invention. Note that the communication terminal device 100 according to the present embodiment naturally has functions normally included in the communication terminal device, such as an input unit configured with switches and buttons, a wireless processing unit that performs predetermined wireless processing, and an antenna. Forces to be described In the present embodiment, description thereof is omitted.

Communication terminal device 100 shown in FIG. 2 includes packet separation unit 101, data broadcast content analysis unit 102, encryption unit 103, communication content acquisition unit 104, data broadcast content extraction unit 105, and content. Recording unit 106, playback control unit 107, and content reconstruction unit 10 8, a decoding unit 109, a remultiplexing unit 110, a digital broadcast decoding unit 111, a display unit 112, and the like.

[0015] The packet separation unit 101, the data broadcast content analysis unit 102, the encryption unit 103, the communication content acquisition unit 104, the data broadcast content extraction unit 105, and the content recording unit 106 of the communication terminal device 100 are records for recording a digital broadcast. The content recording unit 106, the playback control unit 107, the content reconfiguration unit 108, the decoding unit 109, the remultiplexing unit 110, the digital broadcast decoding unit 111, and the display unit 112 function as a device, and play a digital broadcast. Function as.

[0016] The packet separation unit 101 receives a transport stream (TS) signal that is demodulated from a terrestrial digital RF (Radio Frequency) signal and that multiplexes video, audio, data, and the like. This TS signal is composed of a sequence of 188-byte fixed-length packets (TS packets) compressed and encoded in the MPEG2-TS format. The payload of the packet contains a data sequence (PES: Packetized Elementary) such as video and audio. Stream), subtitles, data broadcasting information such as BML (Broadcast Markup Language), and control information such as program specific information (PSI) and service information (SI). A packet identifier (Packet Identification, hereinafter referred to as “PID”) for identifying each information is assigned to the header portion of the TS packet.

[0017] The packet demultiplexing unit 101 uses this TS signal as a data broadcast TS packet (hereinafter referred to as "data broadcast TS") related to data broadcast and a video / audio TS packet (hereinafter referred to as "data broadcast TS") related to data broadcast using the PID. The data broadcast TS is output to the data broadcast content analysis unit 102, and the video / audio TS is output to the encryption unit 103 in the TS format. That is, the packet separation unit 101 separates the data broadcasting content related to data broadcasting and the video / audio content related to video / audio from the TS signal.

[0018] The data broadcast content analysis unit 102 first converts the data broadcast content configured in the carousel system into a file format from the TS format. As a result, information such as subtitles and BML included in the data broadcasting content TS, identification information for identifying the content, time information indicating the display timing for the video and audio content, program specific information (PSI) and service information (SI) Each information such as control information and trigger information such as broadcast interrupt becomes an information file. Then, the data broadcast content analysis unit 102 analyzes the already acquired content. Compared with the identification information, it analyzes whether the identification information in this information file is new or not, and outputs the analysis result and the information file constituting the data broadcasting content to the data broadcasting content extraction unit 105. .

[0019] In addition, when the analyzed identification information is new, the data broadcast content analysis unit 102, for example, a URI (Uniform Resource Identifier) or the like described as anchor information from an information file such as BML. Analyzes the presence / absence of link information of URL contents such as URL (Uniform Resource Locator). Here, when link information is detected, the data broadcast content analysis unit 102 outputs communication content acquisition instruction information to the communication content acquisition unit 104.

The encryption unit 103 encrypts the video / audio TS separated by the packet separation unit 101 with a unique key for the purpose of copyright protection and the like, and outputs it to the content recording unit 106. The encrypted video / audio TS is recorded in the video / audio TS recording area 114 of the content recording unit 106 described later. As described above, the encryption unit 103 encrypts the video / audio TS, so that the content recording unit 106 described later can be handled as a recording medium of a nonvolatile semiconductor memory such as SD (Secure Digital). Become.

The communication content acquisition unit 104 acquires communication content information placed on the communication server based on the communication content acquisition instruction information input from the data broadcast content analysis unit 102, and the content recording unit Output to 106. The acquired communication content is recorded in a data broadcast content recording area 113 of the content recording unit 106 described later.

[0022] As described above, in data broadcasting content in mobile communication, not only content transmitted by radio waves but also content placed on a server or the like using a communication network such as the Internet is often used. Therefore, when data broadcast content is recorded, the communication content is acquired and recorded in the data broadcast content recording area 113, so that even when the service is terminated on the communication server, Communication content can be displayed.

[0023] The data broadcast content extraction unit 105 displays the data broadcast content and time information indicating the display timing of the data broadcast content with respect to the video and audio content according to the analysis result input from the data broadcast content analysis unit 102. In recording unit 106 Output.

[0024] Specifically, if the analysis result indicates that the identification information is new, the data broadcast content extraction unit 105 is not the same data broadcast content as compared with the already acquired content, that is, It is determined that the data broadcasting content is different. Then, the data broadcast content extraction unit 105 extracts the data broadcast content converted into the file format, and outputs the extracted data broadcast content to the content recording unit 106. Here, the data broadcast content in the extracted file format is the minimum data broadcast content necessary for synchronous playback with video / audio content during playback.

[0025] In addition, when the analysis result indicates that the identification information is new, the data broadcast content extraction unit 105 combines the extracted data broadcast content with the extraction of the data broadcast content converted into the file format. Synchronous information necessary for synchronous playback with the video / audio content, that is, time information indicating the display timing, is extracted and output to the content recording unit 106 as a control information file. This control information file is information necessary for realizing data broadcasting in a program-linked format such as a quiz program linked with video together with a data broadcasting content. In addition to the time information described above, program specific information, This includes trigger information that indicates the timing of event messages that are interrupted by video and audio.

[0026] On the other hand, if the analysis result indicates that the identification information is new, the data broadcast content extraction unit 105 determines that the data broadcast content is the same as compared with the already acquired content. , Do not extract data broadcasting content.

That is, the data broadcast content extraction unit 105 extracts the data broadcast content in the file format only at every timing when the file changes, that is, only when the content is updated. In other words, the data broadcast content extraction unit 105 regards identification information indicating new content as update information indicating content update, and extracts data broadcast content when this update information is detected.

[0028] Here, the data broadcast content of the file format extracted by the data broadcast content extraction unit 105 and the control information such as time information are, for example, the ARIB— of the Association of Radio industrial and Businesses. STD—Data broadcast program format specified in B35. This ARIB- STD- B35 is a different broadcast Since the format is defined for the purpose of sharing data broadcasting contents between operators, the contents can be used between different manufacturers. Therefore, it is useful from the viewpoint of versatility to use the same format in the receiver as a usage format of the data broadcast content in the program-linked data broadcast content.

The content recording unit 106 includes a data broadcast content recording area 113 and a video / audio TS recording area 114. In the data broadcast content recording area 113, data broadcast content in the file format input from the data broadcast content extracting unit 105 is recorded, and in the video / audio TS recording area 114, the TS format input from the encryption unit 103 is recorded. Video and audio content is recorded. Further, the control information file created by the data broadcast content extracting unit 105 is recorded in the control information recording area 115 in the data broadcast content recording area 113 of the content recording unit 106.

[0030] For example, in the data broadcast content recording area 113, the data broadcast content 301 extracted as shown in FIG. 3 and the time information file 302 are recorded. In the time information file 302, identification information for identifying each data broadcast content and time information indicating the display timing for the video / audio content are recorded in association with each other. By using this time information, the content reconstructing unit 108, which will be described later, can reconstruct the data broadcast content into the TS format and adopt the carousel method.

[0031] Further, since the data broadcast content takes the form of a browser or the like, it can be used separately from video and audio. In the present embodiment, the content recording unit 106 has been described by using a built-in memory. However, instead of the built-in memory, a recording medium such as a memory card, or a built-in memory and a recording medium may be used in combination.

[0032] Also, the content recording unit 106, when playing back the content, follows the output instructions from the content reconstruction unit 108 and the decryption unit 109 described later, and the data broadcast recorded in the data broadcast content recording area 113 The content file and the control information file are output to the content reconstruction unit 108, and the video / audio TS recorded in the video / audio TS recording area 114 is output to the decoding unit 109.

[0033] The reproduction control unit 107 includes a content recording unit 106, a content reconstruction unit 108, a decoding unit 109, a remultiplexing unit 110, a digital broadcast decoding unit 111, and a display unit 112 related to the reproduction operation. In particular, when the user is also instructed to play back the desired content via the input unit (not shown), the content restructuring unit 108, the decoding unit 109, and the remultiplexing unit 110 are instructed to play back. Output information.

[0034] When the reproduction instruction information is input from the reproduction control unit 107, the content reconstruction unit 108 acquires the control information file from the content recording unit 106. Then, the content reconfiguration unit 108 converts the data broadcast content input from the content recording unit 106 from the file format to the TS format based on the time information in the control information file, and outputs it to the remultiplexing unit 110. .

[0035] Specifically, the content reconstructing unit 108 changes the content identification information to be updated next from the timing (time) indicated by the time information associated with the identification information of the data broadcast content to be played back. The data broadcasting content in the file format is reconfigured to the same TS format as the data broadcasting TS separated by the packet separation unit 101 so that the data broadcasting content is repeated until the timing (time) indicated by the associated time information. To do. That is, the content reconstruction unit 108 performs data display so that the acquired data broadcast content is repeatedly displayed from the display timing of the acquired data broadcast content to the display timing of the data broadcast content updated next to the content. Reconfigure broadcast content to TS format.

For example, in FIG. 3, when the data broadcast content to be instructed to be reproduced is data broadcast content A, the timing indicated by the time information associated with the identification information 01 identifying this data broadcast content A is tl. is there. Accordingly, the data broadcast content is reconfigured in the TS format so that the data broadcast content A is repeated from the timing tl to the timing t6 when the next content (data broadcast content B) is updated. As a result, a carousel transmission mode is established, and the current data broadcast content is repeated until the next data broadcast content update timing.

[0037] When the playback instruction information is input from playback control section 107, decryption section 109 decrypts video / audio TS obtained from content recording section 106 with a unique key, and remultiplex section 110. Output to.

[0038] The re-multiplexing unit 110 receives the program specifying information and the trie input from the content recording unit 106. Based on the control information such as the video information, the data broadcasting TS reconstructed by the content reconstructing unit 108 and the video / audio TS decoded by the decoding unit 109 are remultiplexed, and the packet demultiplexing unit 101 The same TS signal format as before being separated by the digital broadcast decoding unit 111 is output.

[0039] The digital broadcast decoding unit 111 performs a predetermined decoding process on the TS signal in which the video / audio content and the data broadcast content are multiplexed by the remultiplexing unit 110, and displays the decoded data on the display unit 112. Output to.

[0040] Display unit 112 includes a liquid crystal display or the like having a screen area for displaying video / audio content and a screen area for displaying data broadcast content. The display unit 112 displays data input from the digital broadcast decoding unit 111.

Next, with reference to FIGS. 4 to 6, the data broadcast content analysis unit 102, the data broadcast content extraction unit 105, and the content recording unit 106 that function as the recording device of the communication terminal device 100 are compared with conventional recording devices. A specific description will be given in comparison.

[0042] Fig. 4 shows examples of band usage by media in digital broadcasting, Fig. 5 shows data transmission by the data carousel method, and Fig. 6 shows storage in the conventional recording (recording) method and the recording (recording) method of the present invention. The comparison figure of capacity is shown.

[0043] As shown in FIG. 4, when compared to the video and audio bandwidth usage areas, the data broadcasting bandwidth usage area is small, but when all data broadcasting content of the same content is recorded as in the past, However, mobile phone devices with a small recording capacity account for a large proportion.

[0044] As shown in FIG. 5, since the data broadcast content is transmitted in a carousel system, the same data broadcast content is repeatedly transmitted until the content is changed. That is, when data broadcast content A is transmitted by tl, the same data broadcast content is repeatedly transmitted until t6 when the content of data broadcast content A changes.

Therefore, when all the TS signals are recorded as in the conventional recording method shown in FIG. 1, the same data broadcast content is used until the next new content is updated from data broadcast content A to data broadcast content B at t6. Since A is repeatedly recorded, useless recording areas are increased. For example, linked to news program (video / audio content) If the update frequency of weather information (digital broadcast content) etc. displayed is relatively low, the recording area occupied by the same content will be further increased.

[0046] That is, the conventional recording method is suitable for sharing the content recording format in fixed reception with a large recording capacity, while it is suitable for sharing a content recording format in a small portable terminal device or the like. In order to record with the same recording method as the fixed receiver, an extra recording capacity is required.

[0047] Therefore, the present invention focuses on the transmission form of data broadcast content and the identification information included in the data broadcast content, determines whether the content has already been acquired based on this identification information, Only when the content is judged to be content, the data broadcast content and the control information such as time information necessary for synchronizing the data broadcast content with the video / audio content are recorded together. This recorded data broadcast content is the minimum required amount of data broadcast content that constitutes a video / audio content and a program (program) during playback.

That is, referring to FIG. 5, the present invention extracts and records data broadcast content only at times tl and t6 when identification information 01 and identification information 02 indicating new data broadcast content are detected. To do. In other words, the present invention determines the update timing of the data broadcast content from the identification information, and does not record the data broadcast content at the timing when the content is not updated (t2 to t5 shown in FIG. 5).

[0049] With this, it is possible to record the same data broadcast content in the past, and not record the duplicate data broadcast content in the recording area, and record the data broadcast content different from the already recorded content. it can. Also, as will be described later, since the recorded minimum necessary content can be played back, it is not always necessary for recording, and it is avoided that data broadcasting content occupies a part of a small recording capacity, and is limited. Recorded capacity is available 禾 IJ can be used.

[0050] As described above, the data broadcast content includes a plurality of information files such as a BML document file such as trigger information (event message) and layout information such as broadcast interrupt, and an image file such as JPEG and PNG. It consists of multiple modules that are modularized in units and assigned identification numbers. This module is also used for multiple data blocks. The divided data blocks are packetized and transmitted as TS signals from the broadcasting station.

[0051] In the recording system according to the present invention, the data broadcast content analysis unit 102 converts the data broadcast content in the TS format separated by the packet separation unit 101 into a file format, and Analyzes whether or not there is identification information indicating new content, and determines whether the content is different from the content already acquired.

That is, when the data broadcast content analysis unit 102 detects identification information indicating new content, the data broadcast content extraction unit 105 determines that the data broadcast content is different from the already acquired content. Then, control information such as time information indicating display timing necessary for synchronously reproducing the data broadcast content in the file format and the data broadcast content with the video / audio content is recorded in the content recording unit 106. In other words, the data broadcast content extraction unit 105 extracts only the minimum necessary data broadcast content and control information constituting the program (program) together with the video and audio content when playing back, and sends it to the content recording unit 106. Record.

As a result, as shown in FIG. 6, there is a large difference in recording capacity when recording with the conventional recording method and when recording with the file format according to the present invention. Specifically, in the conventional recording method, since all data broadcast TS transmitted by the carousel method are recorded, the recording capacity increases linearly as the recording time becomes longer as indicated by the solid line 501. In other words, the recording capacity increases at a rate of 30 to 80 kbps X hours in the bandwidth usage area for data broadcasting in FIG.

[0054] On the other hand, in the recording method of the present invention, as shown by the solid line 502, the same data broadcast content is not recorded redundantly, so when the data broadcast content is updated (tO, t1, and t2 shown in Fig. 6). ) Only, the data broadcasting content capacity increases stepwise. As a result, it is possible to significantly reduce the recording capacity related to the data broadcasting content as compared with the conventional recording method.

Next, a recording operation and a reproducing operation of communication terminal apparatus 100 having the above configuration will be described. First, the recording operation of communication terminal apparatus 100, particularly the digital broadcast content recording operation, will be described with reference to the flowchart of FIG. [0056] First, in step S701, the packet separation unit 101 separates the TS signal into a data broadcast TS related to data broadcast and a video / audio TS related to video / audio, and the data broadcast content analysis unit 102 and the encryption are respectively transmitted in TS format. The data is output to section 103. The separated video / audio TS is encrypted by the encryption unit 103 and recorded in the video / audio TS recording area 114 of the content recording unit 106 in the TS format.

[0057] Next, in step S702, the data broadcasting content analysis unit 102 converts the data broadcasting content in TS format into a file format.

[0058] Next, in step S703, the data broadcast content analysis unit 102 analyzes whether or not the identification information indicating the content in the data broadcast content converted into the file format is new, and the analysis result and the file The data broadcast content in the format is output to the data broadcast content extraction unit 105. If the identification information is new (step S704: YES), the process proceeds to step S705. If the identification information is not new (step S704: NO), the process proceeds to step S707.

[0059] If the identification information is new in step S704, in step S705, the data broadcast content extraction unit 105 determines that the data broadcast content is different from the already acquired data broadcast content. Synchronous information necessary for synchronizing the data broadcast content with the video / audio content, that is, time information indicating the display timing, is extracted and output to the content recording unit 106 together with control information such as trigger information.

Next, in step S706, the content recording unit 106 records the data broadcast content, time information, and control information in the data broadcast content recording area 113. Then, the recording operation is finished.

On the other hand, if the identification information is not new in step S704, in step S707, the data broadcast content extraction unit 105 determines that the data broadcast content is the same as the already acquired data broadcast content, and the data broadcast content Extraction is not performed, and the operation ends.

Next, the playback operation of the content recorded in communication terminal apparatus 100 will be described using the flowchart in FIG.

[0063] First, in step S801, according to the reproduction instruction information input from the reproduction control unit 107, The content reconstruction unit 108 acquires data broadcast content recorded in the file format, and the decoding unit 109 acquires the video / audio content recorded in the content recording unit TS format from the content recording unit 106.

[0064] Next, in step S802, the content reconstructing unit 108 receives a display timing for the video / audio content of the data broadcast content acquired in step S801 from the content recording unit 106, that is, a time information file indicating the synchronized playback timing. To get.

[0065] Next, in step S803, based on the time information acquired in step S802, the content reconfiguration unit 108 displays the display timing force associated with the acquired content. The data transmission content in the file format is reconstructed into the same TS format as the data broadcasting TS separated by the packet separation unit 101 so that the data broadcasting content acquired in step S801 is repeated until the associated display timing. To do. As a result, a carousel transmission mode is established, and the current data broadcasting content is repeated until the next data broadcasting content update timing.

[0066] Next, in step S804, the decryption unit 109 decrypts the video / audio TS with a unique key, and in step S805, the re-multiplexing unit 110 performs threading and specifying information, trigger information, and the like. Based on the control information, the data broadcasting TS and the decoded video / audio TS are remultiplexed. As a result, the video / audio content and the data broadcast content become a program (program) that is played back synchronously.

[0067] Next, in step S806, the digital broadcast decoding unit 111 performs a predetermined decoding process on the remultiplexed TS signal, and in step S807, the display unit 112 displays the decoded data. To do. Then, the reproduction operation ends. Note that the timing of acquisition of time information in step S802 and the decoding process in step S804 in FIG. 8 are not limited to the timing described above.

As described above, according to the present embodiment, communication terminal apparatus 100 separates data broadcast content related to data broadcast and video / audio content related to video / audio from the digital broadcast signal, and Analyzes whether or not the identification information for identifying the content is new. When the identification information is new, the communication terminal device 100 responds to the data broadcast content and the video / audio content of the data broadcast content. Time information indicating the display timing is extracted, and the time information is recorded together with the video / audio content and the extracted data broadcast content. As a result, the recording capacity for data broadcasting can be greatly reduced.

[0069] According to the present embodiment, communication terminal apparatus 100 multiplexes and multiplexes the video / audio content and the data broadcast content corresponding to the display timing of the video / audio content based on the time information. Display the recorded signal. As a result, video / audio contents and data broadcasting contents can be synchronized and played back without restricting the digital broadcasting service.

[Embodiment 2]

In Embodiment 1, the data broadcasting content and the data broadcasting content are synchronized by converting the data broadcasting content and time information recorded in the file format in the content recording unit 106 into the TS format and remultiplexing with the video and audio TS. I tried to play it. In Embodiment 2 of the present invention, based on the time information indicating the display timing (synchronous playback timing) by the synchronization control unit, the video / audio content to be played back by the digital broadcast decoding unit and the playback by the data broadcast content display processing unit By implementing synchronization control with the data broadcasting contents in the file format, a program-linked data broadcasting service will be realized.

FIG. 9 is a functional block diagram showing a configuration of communication terminal apparatus 900 capable of receiving digital terrestrial broadcasting and recording / reproducing according to Embodiment 2 of the present invention. In the configuration of communication terminal apparatus 900 according to the present embodiment, the same components as communication terminal apparatus 100 shown in FIG.

[0072] Communication terminal apparatus 900 in FIG. 9 deletes content reconfiguration unit 108 and remultiplexing unit 110 in comparison with communication terminal apparatus 100 in FIG. 2, and synchronizes control unit 901 and data broadcast content. A display processing unit 902 and a digital broadcast decoding unit 903 are added. That is, the communication terminal device 900 has the same configuration up to the recording device that records the content as in FIG. 2, but only the configuration of the playback device.

When the playback instruction information is input from the playback control unit 107, the synchronization control unit 901 acquires a time information (synchronization information) file from the control information recording area 115 of the content recording unit 106. Then, the synchronization control unit 901 performs data broadcast content based on the acquired time information. Synchronous control of display reproduction of the display processing unit 902 and the data broadcast decoding unit 903 is performed. In other words, the synchronization control unit 901 uses the time information indicating the display timing (synchronous playback timing) for the video / audio content, and the display of the data broadcast content is changed according to the update timing when the time information is updated. Display control to synchronize with the display of audio content.

[0074] Data broadcast content display processing unit 902 performs display processing of the data broadcast content input from content recording unit 106, and outputs it to display unit 112 in the browser format in accordance with the display control of synchronization control unit 901. To do.

The digital broadcast decoding unit 903 performs a predetermined decoding process on the video / audio reproduction TS input from the decoding unit 109, and outputs it to the display unit 112 according to the synchronization control of the synchronization control unit 901.

Next, the reproduction operation of communication terminal apparatus 900 having the above configuration will be described. FIG. 10 is a flowchart showing the reproduction operation of communication terminal apparatus 900.

[0077] First, in step S1001, the synchronization control unit 901 follows the playback instruction information input from the playback control unit 107, and displays the display timing for the video / audio content of the data broadcast content from the control information recording area 115, ie, synchronization. Acquires time information (synchronization information) indicating playback timing.

Next, in step S1002, the data broadcast content display processing unit 902 acquires the file format data broadcast content from the content recording unit 106 in accordance with the playback instruction information input from the playback control unit 107.

[0079] Next, in step S1003, the decoding unit 109 obtains the video / audio TS recorded in the TS format from the content recording unit 106, performs a predetermined decoding process, and the digital broadcast decoding unit 903 Acquire video / audio TS after decoding.

Next, in step S1004, the synchronization control unit 901 controls the display of the data broadcast content display processing unit 902 and the digital broadcast decoding unit 903 based on the acquired time information (synchronization information)! I do. That is, the synchronization control unit 901 uses the time information indicating the display timing (synchronous playback timing) for the video / audio content, and the display of the data broadcast content is changed according to the update timing at which the time information is updated. Table of Display control to synchronize with the display.

In step S1005, display unit 112 displays the video / audio content and the digital broadcast content that are synchronously controlled. Then, the reproduction operation ends.

In the present embodiment, the force described in the reproducing operation in the order of steps S 1001 to S 1003 is not limited to this order.

As described above, according to the present embodiment, communication terminal apparatus 900 acquires time information recorded in the content recording unit, and displays and displays video / audio content based on this time information. Synchronize the display of data broadcasting content. As a result, the audio / video content and the data broadcast content can be played back synchronously without restricting the digital broadcast service, and the processing load during playback can be further reduced.

That is, in the present embodiment, file format data is used by using time information indicating the synchronized playback timing so that two different applications are executed without changing the recording format at the time of recording. Synchronous control of broadcast content playback and TS format video / audio content playback.

[0085] Note that the recording unit of the communication terminal device according to the present embodiment can separately manage the playback state of the video and audio and the data broadcast. Therefore, it can be played back asynchronously by the viewer's selection. It is pretty.

[0086] In the present embodiment, the data broadcast content display processing unit 902 and the digital broadcast decoding unit 903 are provided to display and process the data broadcast content and the video / audio content separately. For example, the data broadcast content display processing unit 902 may be included in the digital broadcast decoding unit 903.

Industrial applicability

[0087] The communication terminal device and recording method of the present invention can reduce the recording capacity related to data broadcasting, and can synchronously reproduce video / audio content and data broadcasting content without restricting the broadcasting service. Therefore, it is useful in a communication terminal device capable of receiving terrestrial digital broadcasting and recording / playback.

Claims

The scope of the claims

[1] Digital broadcasting signal power Separation means for separating data broadcasting content related to data broadcasting and video / audio content related to video / audio,

Analyzing means for analyzing whether or not the identification information for identifying the content in the data broadcasting content is new;

An extraction means for extracting the data broadcast content and time information indicating display timing of the data broadcast content with respect to the video / audio content when the identification information is new;

A communication terminal device comprising: recording means for recording the video / audio content and the extracted data broadcast content together with the time information.

[2] If the identification information is new and the analyzed data broadcast content includes link information via a communication server related to the data broadcast content, communication is performed based on the link information. The communication terminal apparatus according to claim 1, further comprising a communication content acquisition unit that acquires content and records the content in the recording unit.

[3] Multiplexing means for multiplexing the video / audio content and data broadcast content corresponding to the display timing of the video / audio content based on the time information, and display means for displaying the multiplexed signal The communication terminal device according to claim 1, further comprising:

[4] a data broadcast content display means for displaying the data broadcast content recorded in the recording means;

Video and audio content display means for displaying the video and audio content recorded in the recording means;

2. The communication terminal device according to claim 1, further comprising synchronization control means for causing the display of the data broadcast content to correspond to the display timing of the video / audio content based on the time information.

[5] Digital broadcasting signal power Separation step for separating data broadcasting content related to data broadcasting and video / audio content related to video / audio,

Whether the identification information for identifying the content in the data broadcasting content is new An analysis step for analyzing

If the identification information is new, an extraction step of extracting the data broadcast content and time information indicating display timing of the data broadcast content for the video / audio content;

And a recording step of recording the video / audio content and the extracted data broadcast content together with the time information.