JP4767799B2 - Digital broadcast recording apparatus and digital broadcast recording method - Google Patents

Description

  The present invention relates to a digital broadcast recording apparatus and a digital broadcast recording method that can be used when receiving and recording or reproducing a digital broadcast transmitted from a predetermined transmission station according to a standard such as terrestrial digital broadcast.

  Recently, a tuner for digital terrestrial broadcasting is installed in a portable terminal such as a cellular phone terminal so that various program contents broadcast as terrestrial digital broadcasting (for example, one-segment broadcasting) can be received, recorded, and viewed. Reproduction technology has attracted attention.

  In Japan's terrestrial digital broadcasting, the ISDB-T system is adopted. That is, the 6 MHz band (corresponding to one channel of conventional analog broadcasting) broadcast from a broadcasting station is characterized by being divided into 13 subbands and operated. Here, each subband is called a segment.

  For example, by using 12 segments, high-quality HD (high definition) transmission for HDTV installed in a house can be implemented. In addition, it is possible to provide 3 programs of SD (Standard Definition) broadcast for SD television using 4 segments, and flexible program organization is possible.

  In addition, one of the 13 segments is reserved for mobile broadcasting, and using this one segment provides simple video broadcasting for mobile phones and PDAs, etc. One-segment broadcasting (one-segment broadcasting) ).

  When receiving a terrestrial digital broadcast such as a one-segment broadcast, a broadcast stream (TS: transport stream) multiplexed according to MPEG2 Systems (Moving Picture Experts Group 2 Systems), which is a transmission standard, is broadcast. A function of separating various media data from the stream (TS) and reproducing or presenting the media data is required. In addition, a function for recording media data is required as necessary.

  In the MPEG2 standard, image data and audio data are compressed by H264 or AAC method and encoded into data called ES (Elementary Stream), and 1 ES or a plurality of ESs are collectively referred to as PES (Packetized Elementary Stream). Create a packet. This PES packet is inserted into the payload portion of a TS (transport stream) packet.

  Similarly, program guide data and data including an encryption key are referred to as program specific information (PSI Program Specific Information), and are divided into sections and inserted into the payload of the TS packet.

  The PSI includes a PAT (program association table), a PMT (program map table), and the like. For example, the PSI information is transmitted once within a specific time. The PAT or PMT records which packet has what PID (packet identifier) value.

  One TS packet has a fixed length of 188 bytes, and is composed of a packet header having a fixed length of 4 bytes, followed by a data portion of 184 bytes. The data portion is composed of a variable-length adaptation field (which may not be present) and a payload.

  Therefore, the TS packet has a TS header (4 bytes) + adaptation field (may be missing) + PES packet configuration, or a TS header (4 bytes) + adaptation field (may be missing) + section configuration. Can be broadly divided.

  In addition, PES, which is continuous information from one information source, is divided into a plurality of packets, multiplexed with PES packets from other information sources, and stream-transmitted. A PID (Packet Identification) is added to the header of the first 4 bytes of each TS packet so that it can be constructed. That is, the 4-byte header of the TS packet includes a PID (packet identifier) indicating what kind of packet it is.

  In order to receive the TS (Transport Stream) and reproduce the multimedia information, first, the video / audio is discriminated by referring to the PID of each TS packet, and both are separated, and then the TS packet is decoded ( The video / audio information is reproduced by performing demultiplex processing.

  By the way, in actual terrestrial digital broadcasting such as 1-segment broadcasting, a plurality of contents are transmitted in the same period as shown in FIG. 8, for example, in one broadcasting stream (TS). The content referred to here is a set of data distributed from a broadcasting station or transmitting station to a digital broadcast reproducing device (such as a mobile phone terminal) in order to view a digital broadcast. For example, the content is audio data or video data. It consists of data for digital data broadcasting, character data, and the like.

  Therefore, in order to receive and play back specific content, the digital broadcast playback device first receives the PSI, and specifies the desired content from the content content list for all the content included in the PSI as information. . That is, when specifying the content, the packet identifier PID assigned to each content is specified with reference to the PSI.

  For example, in order to play back video content provided from a desired broadcast station, only TS packets (VIDEO01, AUDIO01 in FIG. 8) having a PID assigned to the video content are received, The video content is reproduced by reconstructing a PES (packetized elementary stream) packet from the TS packet and restoring the video content from the reconstructed PES packets.

  On the other hand, TS packets that hold data for content other than the desired content (AUDIO02, AUDIO03, and TEXT01 in FIG. 8) are never received. In particular, portable terminals that do not have much data storage capacity often receive and reproduce only desired content.

  In addition, the prior art relevant to this invention is disclosed by patent document 1 and patent document 2, for example. Patent Document 1 proposes to process information to be downloaded by superimposing information for download on an audio broadcast, and using the received information to access the Internet or the like using the received information. Yes.

Patent Document 2 proposes to use the link information superimposed on the broadcast to access the Internet, save the data on the Internet related to the broadcast together with the broadcast data to the storage medium, and eliminate the trouble such as broken links. is doing.
JP 2002-319226 A JP 2005-510974 A

  In digital broadcasting of a standard such as terrestrial digital broadcasting, data (that is, content) of a series of broadcast programs having continuity in time series such as video and audio is transmitted from a transmitting station to a receiving station using a broadcast stream. The distribution period (distribution period) can be arbitrarily set on the transmission side for each content.

  For example, in the example shown in FIG. 9, it is assumed that a digital TV broadcast program is distributed as content. In FIG. 9, the video content 1 is distributed from 21:00 to 22:00 within this period. The packet data is distributed almost continuously, and other contents (music contents 1 and 2) related to the contents of the video contents 1 are distributed in different predetermined periods.

  A specific example of the music contents 1 and 2 will be described. For example, when the operation mode of the receiver is set so that the viewer receives video content and music content, if music flows in a certain scene S1, S2 in the video content 1, the music data corresponding to that time Distribution of music contents 1 and 2 which are music data of the music is started from the timing immediately after the scene. Therefore, the viewer can easily download the musical piece with interest in the video content while viewing the digital broadcast. In digital broadcasting, as in this example, a plurality of sub contents (music contents 1 and 2) related to main contents such as video contents 1 are often distributed at the same time.

  By the way, since the main content and the sub-content as described above are distributed at the same time, when viewed from the viewer, they seem to be associated with each other. However, there is actually no information for associating the main content and the sub-content, and the conventional digital broadcast reproduction device simply receives and processes the main content and the sub-content distributed at the same time zone at the same time. .

  Therefore, after the broadcast (data distribution) is finished, when the viewer tries to view the content recorded (recorded) during the broadcast, the relevance between the main content and the sub content is recognized. It is difficult to do.

  For example, when the video content 1 shown in FIG. 9 and the music contents 1 and 2 are recorded, one video data and two music data are produced, but the music that was played in the scene S1 in which the video content 1 is present is the music content 1. As for the relevance of whether or not it corresponds to the music obtained by the above, it cannot be recognized unless the viewer actually views the video content 1 and the music content 1 once. Thus, for example, when recording a plurality of programs broadcast in different time zones and then trying to reproduce and view the main content of each program, it is stored to find the desired sub-content. It must be confirmed by actually reproducing and viewing a plurality of sub-contents in order, and it is inevitable that it takes time and effort.

  The present invention is a case where information relating the main content and the sub-content is not transmitted from the transmitting station when the main content and the sub-content distributed independently by digital broadcasting are recorded and reproduced later. However, it is an object of the present invention to provide a digital broadcast recording apparatus and a digital broadcast recording method in which it is easy to find a main content and a sub-content that correspond to each other.

The first invention (Claim 1) includes a view for main content including video content even without less that have a continuity on the time axis as a series of stream information, the relationship between the viewing for main content Digital broadcasting that receives the viewing main content and the viewing subcontent and records the data for viewing when at least the viewing subcontent including the music content is transmitted from a predetermined transmission station as digital broadcast data A recording device for receiving the viewing main content and the viewing subcontent independently, and a first time zone representing from the start to the end of the distribution time or playback time of the received viewing main content; , The relationship with the second time zone representing from the start to the end of the distribution time or playback time of the received viewing sub-content. Correspondingly, when at least a portion of said second time period is included in the first time zone, in a state of association with each other and the video content for viewing main content and music content secondary content for the viewing on the A relevance record management unit for recording is provided.

  In the first invention, based on the relationship between the first time zone and the second time zone, whether or not the received viewing main content and the viewing sub-content have a relationship based on the relationship between the first time zone and the second time zone. Therefore, even if the information indicating the relevance is not included in the data transmitted as a broadcast, the viewing main content and the viewing sub content are associated with each other, for example, grouped for each program. If the viewer wants to play back the main viewing content and the secondary viewing content after the end of broadcasting (after the end of data distribution), the viewer does not actually view the content. However, the desired viewing sub-content to be reproduced can be found immediately.

  Actually, the viewing main content and the viewing subcontent are distributed as broadcast data in independent time zones, but the second time during which the viewing subcontent having a relationship with the viewing main content is distributed. Since the band is determined at a timing such that it partially or entirely overlaps with the first time period in which the viewing main content is distributed (corresponding to the time period from the start time to the end time of the program), the second time When at least a part of the band is included in the first time period, the corresponding viewing sub-content and the viewing main content can be associated with each other as the content included in the same program.

According to a second invention (Claim 2), in the first invention, the relevance record managing unit selects a specific content selected by a viewer's input operation from among a plurality of viewing main contents broadcast simultaneously. Only for the main content for viewing , the music content related to the video content of the main content for viewing is detected.

  In actual digital broadcasting, there are many cases where a plurality of business operators transmit contents of a plurality of programs in the same time zone using the same band of the broadcast signal. Therefore, the contents of a plurality of programs on the same broadcast wave reach the receiving terminal at the same time. However, since a packet identifier PID that is different for each broadcasting station is added to the TS packet for transmitting the contents of each program, it is possible to receive only the program desired by the viewer by distinguishing the program for each broadcasting station. Also, if all the data sent from the transmitting station as digital broadcasting is stored, the amount of data to be stored becomes enormous, but by selectively receiving and storing only the programs desired by the viewer The amount of data to be accumulated can be greatly reduced.

In the second aspect of the invention, only the specific viewing main content selected by the viewer's input operation, that is, the viewing sub-content is detected only for the program that the viewer is watching or is about to watch. Therefore, for the program once viewed by the viewer, the stored viewing sub-content can be reproduced later.

According to a third invention (Claim 3 ), in the first invention, the relevance record management unit has received in the past belonging to the same group as the first viewing main content which is the viewing main content to be processed. For the second viewing main content that is the viewing main content, if the associated viewing sub-content is already recorded, the second viewing main content includes music content related to the video of the first viewing main content The first viewing sub-content is managed by being divided into the same group as the second viewing sub-content including the music content related to the video of the second viewing main content.

  For content such as TV programs and radio programs, for example, the same type of program is broadcast at the same time every day or the same time every day on the same day of the week, or has continuity such as drama 1 In many cases, two programs are broadcast in series. For such programs, it is desirable to manage the same type of programs or the same series of programs as the same group. In the fourth invention, the same type of programs or the same series of programs can be managed as the same group.

The fourth invention (claim 4), in the third aspect, the association record management unit is allocated to the first of the program name and the assigned in view for the main content second viewing for main content It is characterized by identifying whether or not both belong to the same group by comparing with the program name.

  Since the same program name is often assigned to the same type of program or the same series of programs, the first viewing main content corresponds to the second viewing main content by comparing the program names. Whether or not there is a relationship can be identified.

Fifth invention (claim 5) has a view for main content including video content even without less that have a continuity on the time axis as a series of stream information, the relationship between the viewing for main content Control for receiving the viewing main content and viewing subcontent and recording the data for viewing when at least the viewing subcontent including the music content is transmitted from a predetermined transmitting station as digital broadcast data A digital broadcast recording method to be performed, wherein the viewing main content and the viewing subcontent are independently received, and the first to the end from the start to the end regarding the distribution time or playback time of the received viewing main content Second time that represents the time zone and the start to end of the distribution time or playback time of the received viewing sub-contents When at least a part of the second time zone is included in the first time zone according to the relationship with the time zone, the music content of the viewing sub- content and the video content of the viewing main content are It records in the state linked | related with each other.

When the control unit of the receiving terminal for digital broadcasting implements the fifth invention, the same result as the first invention can be obtained.

  According to the present invention, based on the relationship between the first time zone and the second time zone, the relevance record management unit determines whether or not the received viewing main content and viewing subcontent are related. Therefore, even if the information indicating the relevance is not included in the data transmitted as a broadcast, the viewing main content and the viewing sub content are associated with each other, for example, grouped for each program. If the viewer wants to play back the main viewing content and the secondary viewing content after the end of broadcasting (after the end of data distribution), the viewer does not actually view the content. However, the desired viewing sub-content to be reproduced can be found immediately.

(First embodiment)
One embodiment relating to a digital broadcast recording apparatus and a digital broadcast recording method of the present invention will be described below with reference to FIGS.

  FIG. 1 is a flowchart showing an operation at the time of broadcast reception of the digital broadcast recording apparatus in the first embodiment. FIG. 2 is a flowchart showing the operation of the digital broadcast recording apparatus in the first embodiment during program playback. FIG. 3 is a block diagram illustrating a configuration example of a communication system assumed by the digital broadcast recording apparatus according to the first embodiment. FIG. 4 is a block diagram illustrating a configuration example of the digital broadcast recording apparatus according to the first embodiment. FIG. 5 is a time chart showing a specific example of the distribution status and reception status of the program content broadcast in the first embodiment. FIG. 6 is a time chart showing a specific example of the distribution status and reception status of the program content broadcast in the first embodiment.

  In this embodiment, it is assumed that the present invention is applied to each terminal device (receiving station) 30 used in a communication system as shown in FIG. In the communication system shown in FIG. 3, the broadcast program content transmitted from the broadcast station 10 is transmitted from the broadcast wave transmission facility 20 on a broadcast wave of digital terrestrial broadcasting. Each terminal device 30 that is a receiving station receives a broadcast wave of terrestrial digital broadcasting, acquires a desired broadcast program content required by the viewer from various broadcast program contents included therein, Play and store program content data in real time.

  The broadcast program content is composed of main content such as the content of a television program or a radio program, that is, video or audio.

  In addition to the broadcast program content, related content related to the broadcast program content is also transmitted from the broadcast wave transmission facility 20 on the broadcast wave of digital terrestrial broadcasting. The related content is sub-content data related to the program content of a television program or a radio program, and specifically corresponds to download data, CM data, data broadcasting data, or the like. Each terminal device 30 can acquire not only broadcast program content but also related content from received broadcast radio waves.

  In the example shown in FIG. 3, the broadcast station 10 is provided with a music database (DB) 11, a music-program related information database 12, and a program database 13. The program database 13 stores data corresponding to the aforementioned broadcast program content. The music database 11 stores music data corresponding to the above-mentioned related contents, that is, a theme song, an insertion song, and the like. The music-program related information database 12 holds information representing the correspondence between each broadcast program content stored in the program database 13 and each related content stored in the music database 11.

  Accordingly, the broadcast station 10 sequentially puts each broadcast program content stored in the program database 13 and each related content stored in the music database 11 on the broadcast wave of the terrestrial digital broadcast in a necessary time zone. Data is output to the broadcast wave transmission facility 20 so as to be distributed. Note that the content of the music-program related information database 12 is not transmitted as a broadcast.

  The radio wave of digital terrestrial broadcasting transmitted from the broadcast wave transmission facility 20 includes one or a plurality of broadcast streams (TS) of the format shown in FIG. 8 configured according to the digital broadcasting standard as broadcast information. ing. In FIG. 8, the horizontal direction corresponds to the time axis. This broadcast stream is composed of a large number of TS packets that are sequentially transmitted. Each TS packet has a fixed length and includes information such as video information (information composed of video data and audio data), sound information (information composed only of audio data), data for data broadcasting, and the like. That is, the broadcast program content and related content data having continuity in time series are finely divided, and each of the divided data is stored in the payload areas of a number of TS packets and sequentially transmitted.

  The terminal device 30 shown in FIG. 3 is configured as shown in FIG. 4, for example. In addition, as a specific terminal device 30, a mobile phone terminal, a portable information terminal (PDA), a digital broadcast receiver installed in a home, etc. are assumed.

  Referring to FIG. 3, the terminal device 30 includes an antenna ANT, a receiving unit 100, a TS-PID detecting unit 102, a TS packet separating unit 104, a recording / reproducing control unit 106, a memory 108, a video decoding unit. Unit 110, audio decoding unit 112, display control unit 114, audio playback unit 116, display 118, and speaker 120.

  The receiving unit 100 receives a terrestrial digital broadcast radio wave transmitted from the broadcast wave transmission facility 20 via the antenna ANT, and performs a predetermined reception process. That is, since the radio wave of digital terrestrial broadcasting is modulated by OFDM, which is a multi-carrier modulation method, the OFDM modulated signal is demodulated to obtain broadcast information.

  A transport stream signal (MPEG2-TS: see FIG. 8) compliant with MPEG2 is obtained at the output of the receiving unit 100. The transport stream signal MPEG2-TS is supplied in parallel to the TS packet separation unit 104 and the TS-PID detection unit 102 arranged in the preceding stage.

  The TS-PID detection unit 102 executes an original brute force analysis for each TS packet without using information of a PAT (program association table) or PMT (program map table), and based on the analysis result. Detect (extract) the PID value of the TS packet including video data and audio data.

  The PID values such as video data and audio data detected by the TS-PID detection unit 102 are sent to the TS packet separation unit 104.

  The TS packet separation unit 104 refers to the PID values of a large number of TS packets included in the received MPEG2-TS, and extracts a TS packet having the same PID as that sent from the TS-PID detection unit 102. Next, the PES packet inserted in the payload of the extracted TS packet having the same PID value is extracted and reassembled to separate the video PES (V-PES) and the audio PES (A-PES). Output.

  Subsequently, the video PES (V-PES) is decoded by the video decoding unit 110, and the audio PES (A-PES) is decoded by the audio decoding unit 112.

  The decoded video data is sent to the display control unit 114, and a moving image is displayed on the display 118 under the control of the display control unit 114. The decoded audio data is sent to the audio playback unit 116, and the audio playback unit 116 plays back the audio signal. As a result, sound is output from the speaker 120.

  When the received broadcast program content and related content data are stored so that they can be reproduced later, each PES packet output from the TS packet separation unit 104 is controlled by the recording / reproduction control unit 106. Every time, it is stored in the received content information database 51 on the memory 108. Further, the recording / playback control unit 106 generates related information representing the correspondence between each received broadcast program content and related content, and the related information is stored in the related information database 52 on the memory 108. When the content stored on the memory 108 is to be played back later, the recording / playback control unit 106 reads out necessary information from the received content information database 51 and the related information database 52 on the memory 108, and Is supplied to the video decoding unit 110 or the audio decoding unit 112 to reproduce the content.

  The contents of the control of the recording / playback control unit 106 when receiving the terrestrial digital broadcast are shown in FIG. 1 and the contents of the control of the recording / playback control unit 106 when playing back the content stored in the memory 108. Is shown in FIG.

First, the operation of the recording / playback control unit 106 during reception will be described with reference to FIG.
In step S11, it is checked whether or not an instruction to start viewing has occurred due to an input operation from the viewer or a preset viewing start time. When an instruction to start viewing is generated, the process proceeds to the next step S12. Note that the digital broadcast recording apparatus of the present invention is not limited to conditions for instructing to start viewing, such as whether or not there is an input operation from the viewer and whether or not it is a viewing start time.

  In step S12, a broadcasting station that broadcasts the program to be viewed and the program to be viewed are selected according to an input operation from the viewer.

  The contents of a plurality of programs sent from a plurality of broadcasting stations may be superimposed on the same broadcast stream, but different values are assigned to the plurality of programs sent from different broadcasting stations. Therefore, broadcasting stations and programs can be distinguished by distinguishing TS packets by PID values. That is, only the TS packet having the PID value corresponding to the program to be viewed selected in step S12 is acquired via the TS packet separation unit 104.

  In step S13, the recording / playback control unit 106 performs reception processing, playback processing, and storage processing on the received content information database 51 in the memory 108 for the main content of the received program, that is, the above-described broadcast program content. .

  In step S14, the recording / playback control unit 106 checks whether or not reception of sub-contents, that is, related content TS packets related to the main content being processed in step S13, has started.

  For example, in the example shown in FIG. 5, it is assumed that one broadcast stream includes broadcast program content (video content 1) and related content (music contents 1 and 2). In FIG. 5, the broadcast program content (video content 1) as the main content has a broadcast start time of 21:00 and a broadcast end time of 22:00, and a large number of TS packets including this broadcast program content are 21: During the distribution period of 00 to 22:00, it is included in the broadcast stream and sent continuously or intermittently. Note that “distribution section” in FIG. 5 represents a section in which data is transmitted as a broadcast from the transmitting station.

  However, the related contents (music contents 1 and 2), which are sub-contents, are transmitted in a time zone (partially overlapping time zones) different from the main content. That is, the related content (music content 1) is transmitted over a predetermined time from the time of the scene (scene) S1 in the broadcast program content (video content 1), and the related content (music content 2) is transmitted at the time of the scene S2. For a predetermined time.

  In the terminal device 30 that receives the broadcast program content (video content 1), the related content (from the broadcast stream) can be obtained at any time from the scene S1 where the related content (music content 1) is transmitted. The music content 1) can be acquired, and similarly, the related content (music content 2) can be selected from the broadcast stream at any time from the scene S2 where the related content (music content 1) is transmitted. Can be acquired.

  In the example shown in FIG. 5, as shown in (b), the related content (music content 1) is acquired at the time of the scene S3 after the scene S1, and the related content (at the time of the scene S4 after the scene S2) ( It is assumed that the music content 2) is acquired.

  The actual terminal device 30 displays on the screen that related content (music content 1) is present when transmission of related content (music content 1) is started, and in accordance with an input operation from the viewer, It is assumed that acquisition of related content (music content 1) is started at the time of the scene S3. In addition, the acquisition of the related content (music content 1) is automatically started immediately after the transmission of the related content (music content 1) is started, that is, immediately after the scene S1, irrespective of the input operation from the viewer. Can also be assumed.

  In the processing shown in FIG. 1, it is assumed that acquisition of related content is automatically started, and reception of sub-content that is related content is started in step S14 (sub-content appeared in the broadcast stream). When it is detected, the process proceeds to the next step S15.

  In step S15, it is checked whether or not related information already exists in the related information database 52 for the main content that is currently undergoing reception processing. The related information represents a correspondence relationship between the main content and the sub-content, and related information can be accumulated for various main contents received so far. Each main content can be distinguished by, for example, a program name. Therefore, in step S15, it is checked whether or not there is related information that matches the program name with the main content currently being received. If there is matching related information, the process proceeds to step S16. If there is no corresponding related information, the process proceeds to step S17.

  In step S16, information on the sub-content currently being received is acquired and stored in the received content information database 51 in association with the relevant information found in step S15. Accordingly, the correspondence relationship between the sub-content currently being received and the main content currently being received is also managed so that the correspondence relationship is clarified by the related information on the received content information database 51.

  In step S17, information on the sub-content currently being received is acquired, new related information representing the correspondence between the sub-content and the main content currently being received is created, and the sub-content information is received in the received content information database. 51 and the related information is stored in the related information database 52. Accordingly, the correspondence between the currently received sub-content and the currently received main content is managed by the related information on the received content information database 51.

  As a specific example, a folder for data management is created for each program of received main content, and sub-contents corresponding to each other are included in the corresponding folder so that main content and sub-content are Can be managed. In the example shown in FIG. 5, management is performed based on related information so that the sub-contents (music content 1) and (music content 2) are included in the folder assigned to the main content (video content 1). Assume the case.

  If the entire data acquisition of the main content of the program selected in step S12 is not completed, for example, if the broadcast end time 22:00 is not reached in FIG. 5, the main content (video content 1) is transmitted. Since it continues, it returns to step S13 from step S18, and said process is continued.

  Therefore, as shown in FIG. 5, when a plurality of sub contents (music contents 1 and 2) appear in the same distribution section as the main contents as sub contents related to one main content (video content 1). Can acquire (music content 1) and (music content 2), accumulate data, and manage them in association with the related information generated.

  For content such as TV programs and radio programs, for example, the same type of program is broadcast at the same time every day, or at the same time every day on the same day of the week. In many cases, a single program is broadcasted in series. For such programs, it is desirable to manage the same type of programs or the same series of programs as the same group. By performing the processing as shown in FIG. 1, a plurality of program contents can be distinguished by program names and managed by the same related information. Therefore, the same type of programs or the same series of programs are managed as a group. it can.

  By the way, in the process shown in FIG. 1, since the relevant information for associating the main content with each sub-content is generated while the viewer is watching the program, the reception of one main content is started. By the time it ends, their relevance can be identified depending on whether or not secondary content appears in the broadcast stream. However, it is also possible to generate the related information after the viewing of the program ends (after the broadcast ends). However, in that case, it is necessary to record information necessary for generating the related information during reception of the content.

  Specifically, as described below, the time information of each content is recorded and compared, so that the same result as the processing shown in FIG. 1 can be obtained.

  For example, in the example shown in FIG. 5, video content recording starts from the broadcast start time 21:00 of the main content (video content 1), and then the related content (music content 1) that is the sub-content at the time of the scene S1. ) Starts to receive and record related content (music content 1). Therefore, the time (S3) at which reception (acquisition) of (music content 1) is started is recorded.

  On the other hand, the broadcast start time and the broadcast end time are stored as information in (Video content 1). Specifically, in the video content before being divided into PES packets, the broadcast start time and the broadcast end are included in the header thereof. Since the time is described as information, the broadcast start time and broadcast end time of (video content 1) can be acquired.

  Therefore, by comparing the time (S3) at which reception (acquisition) of (music content 1) is started with the broadcast time zone (broadcast start time to broadcast end time) of (video content 1), both are related. It is possible to identify whether or not it has sex.

  As processing for associating (music content 1) and (video content 1), data (files) constituting these contents are stored in the same folder, or the data name is a program of (video content 1). Processing to unify the names or to add a bookmark to a location corresponding to the time of the scene S3 in the (video content 1) using the bookmark function may be performed.

  By associating in this way, at the time of reproducing the recorded (music content 1), only the portion related to the (music content 1) of the associated (video content 1) is It can also be played back in accordance with the playback of (video content 1).

  Similarly, at the time of scene S4 shown in FIG. 5, it is detected that the distribution of the related content (music content 2) is started, the reception / recording of the related content (music content 2) is started, and further reception is performed. By recording the start time (S4) and comparing the reception start time (S4) of (music content 2) with the broadcast time zone (broadcast start time to broadcast end time) of (video content 1). , It is possible to identify whether or not both are related.

  By the way, as shown in FIG. 6, for example, a case where a plurality of broadcast program contents (video contents 1 and 2) whose distribution times are continuous is continuously recorded may be considered.

  In FIG. 2, it is assumed that (music content 1) and (music content 2) appear as sub-contents related to (video content 1), and the distribution section of (music content 1) is (video Although it is within the range of the broadcast time zone (broadcast start time to broadcast end time) of content 1), the distribution section of (music content 2) exceeds the broadcast end time of (video content 1). Further, the distribution section of (music content 2) extends over the distribution section of (video content 1) and the next distribution section of (video content 2).

  Even in such a case, the time S4 when the reception (acquisition) of the related content (music content 2) is “started” is in the distribution section between the broadcast start time and the broadcast end time of (video content 1). (Music content 2) and (Video content 1) can be associated with each other. In addition, it is checked whether or not the time (S4) when the reception (acquisition) of the related content (music content 2) is “started” is in the distribution section between the broadcast start time and the broadcast end time of (video content 2). Thus, it can be correctly recognized that there is no relation between (music content 2) and (video content 1).

  However, the determination is made using the time (S4 ′) when the reception of the related content (music content 2) is “finished” instead of the time (S4) when the reception (acquisition) of the related content (music content 2) is “started”. In the case of performing, since it is erroneously determined that (music content 2) corresponds to (video content 2), it is desirable to determine using the time when the reception (acquisition) of related content is “started”. .

  However, in the example illustrated in FIG. 6, the related content (music content 2) and (video content 1) may be associated with each other, and the related content (music content 2) and (video content 2) may be associated with each other at the same time. . In that case, the time may be compared using both the time (S4) at which the reception (acquisition) of the related content (music content 2) is started (S4) and the time (S4 ') at which the related content (music content 2) is ended.

Next, the operation of the recording / playback control unit 106 when the terminal device 30 plays back content stored in the memory 108 will be described with reference to FIG.
In step S21, the process waits for an instruction to start playback due to an input operation from the viewer or a playback start time set in advance. When the reproduction instruction is generated, the process proceeds to the next step S22. Note that the digital broadcast recording apparatus of the present invention is not limited to the conditions under which a playback start instruction is generated, such as whether or not there is an input operation from a viewer and whether or not it is a playback start time.

  In step S22, the main content to be reproduced is retrieved from the received content information database 51 on the memory 108, and the data of the main content of the necessary program is acquired.

  In step S23, the related information database 52 is searched for related information corresponding to the specific main content acquired in step S22. If the relevant information is found, the process proceeds from step S23 to step S24. If the relevant information does not exist, the process proceeds to step S25.

  In step S24, sub-contents having relevance with the main content acquired in step S22 are acquired from the received content information database 51 in accordance with the specific related information found in step S23.

  In step S25, the reproduction process is performed on the main content selected in step S22. That is, the video or audio of the main content is reproduced. Further, when the sub-content acquired in step S24 exists, the process of step S26 is also executed. In step S26, sub-content data is also reproduced simultaneously. For example, when a program such as a drama is reproduced as the main content, a theme song or an insertion song related to the program is simultaneously reproduced as sub-contents.

  As described above, the terminal device 30 determines whether or not there is a relevance between the two by examining whether or not the related content that is the sub-content appears during the period in which the broadcast program content that is the main content is distributed (transmitted). Since the related information is generated by identification, the main content and the sub content that do not include the related information in the broadcast stream can be automatically associated and managed. Further, by recording and comparing the reception time of each content and the time of the distribution section, it is possible to generate related information even after the broadcast ends.

(Second Embodiment)
Another embodiment of the digital broadcast recording apparatus and digital broadcast recording method of the present invention will be described below with reference to FIG. FIG. 7 is a time chart showing a specific example of the distribution status and reception status of the program content broadcast in the second embodiment.

This form is a modification of the first embodiment. The points changed with respect to the first embodiment will be described below.
That is, in the first embodiment, it is assumed that a plurality of contents (main content and sub-content) included in one program are distributed by one broadcast stream, but in the second embodiment, It is assumed that a plurality of contents (main content and sub-content) included in one program are distributed by a plurality of broadcast streams received simultaneously. Then, the main content and the sub content included in different broadcast streams are associated with each other.

  Since it is necessary to simultaneously receive and demodulate a plurality of broadcast streams, the terminal device 30 according to the second embodiment includes a plurality of functional blocks including the receiving unit 100 and the TS packet separating unit 104 illustrated in FIG. It is necessary to install. Further, the processing executed by the recording / playback control unit 106 is changed so that the content data respectively extracted from a plurality of broadcast streams are associated with each other.

  In the example illustrated in FIG. 7, it is assumed that a plurality of contents included in one program are distributed as terrestrial digital broadcasting using two of (broadcast stream A) and (broadcast stream B). In FIG. 7, the main content (video content 1) appears in (broadcast stream A) in the time zone from the broadcast start time (21:00) to the broadcast end time (22:00) and is a sub-content ( The music content 1) appears in (broadcast stream B) at the time corresponding to the scene S1 of (video content 1), and the sub content (music content 2) is the time corresponding to the scene S2 of (video content 1). Appear in (broadcast stream A).

  Therefore, in the terminal device 30 according to the second embodiment, the recording / reproduction control unit 106 operates as follows. After the video content recording starts from the broadcast start time 21:00 of (video content 1) distributed by (broadcast stream A), the related content (music content 1) is transmitted by (broadcast stream B) at time (S1). Is detected, the related content (music content 1) is started to be received and recorded, and the time (S3) at which the reception (acquisition) is started is recorded.

  Since (video content 1) stores broadcast start time and broadcast end time as information, the recording / playback control unit 106 receives (music content 1) during the broadcast start time and broadcast end time. Whether or not there is a time (S3) is identified, and if it is within the range, related information for associating (video content 1) with (music content 1) is generated.

  As described above, even when a plurality of contents related to one program are distributed using two or more broadcast streams, the main contents and the sub contents can be associated with each other.

  The digital broadcast recording apparatus and the digital broadcast recording method of the present invention are applied to a mobile phone terminal, a portable information terminal, and other receiving apparatuses that receive broadcasts such as terrestrial digital broadcasts. When a plurality of contents are broadcast independently of each other, even if information indicating the relation of the plurality of contents is not broadcast, the receiving side automatically generates the related information and performs the association. Therefore, when trying to play back content that has been received and once stored in memory, it is possible to easily find relevant content without actually viewing it, and viewer operability is improved. Greatly improved.

It is a flowchart which shows the operation | movement at the time of the broadcast reception of the digital broadcast recording apparatus in 1st Embodiment. It is a flowchart which shows the operation | movement at the time of the program reproduction of the digital broadcast recording apparatus in 1st Embodiment. It is a block diagram which shows the structural example of the communication system which the digital broadcast recording device of 1st Embodiment assumes. It is a block diagram which shows the structural example of the digital broadcast recording apparatus in 1st Embodiment. It is a time chart which shows the specific example of the delivery condition and reception condition of the program content broadcast in 1st Embodiment. It is a time chart which shows the specific example of the delivery condition and reception condition of the program content broadcast in 1st Embodiment. It is a time chart which shows the specific example of the delivery condition and reception condition of the program content broadcast in 2nd Embodiment. It is a schematic diagram which shows the structural example of one broadcast stream (TS) transmitted by terrestrial digital broadcasting. It is a time chart which shows the specific example of the delivery condition of the program content broadcast.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Broadcasting station 11 Music database 12 Music-program related information database 13 Program database 20 Broadcasting wave transmission equipment 30 Terminal device 51 Reception content information database 52 Related information database 100 Receiving part 102 TS-PID detection part 104 TS packet separation part 106 Recording and recording Playback control unit 108 Memory 110 Video decoding unit 112 Audio decoding unit 114 Display control unit 116 Audio playback unit 118 Display 120 Speaker

Claims (5)

A view for main content including video content even without least that having a continuity on the time axis as a series of stream information, and the sub-contents for viewing including at least music content having relevance to the view for main content A digital broadcast recording device that receives the main content for viewing and the secondary content for viewing and records the data for viewing when transmitted from a predetermined transmission station as digital broadcast data;
The main content for viewing and the secondary content for viewing are received independently, and the first time zone indicating from the start to the end regarding the distribution time or playback time of the received main content for viewing, and the received viewing secondary content When at least a part of the second time zone is included in the first time zone according to the relationship with the second time zone representing from the start to the end regarding the distribution time or playback time of the content, A digital broadcast recording apparatus, comprising: a relevance record management unit that records music content of viewing sub-contents and video content of viewing main content in association with each other. The digital broadcast recording apparatus according to claim 1,
The relevance record management unit relates to the video content of the viewing main content only for the specific viewing main content selected by the viewer's input operation among the plurality of viewing main content broadcast simultaneously. A digital broadcast recording apparatus characterized in that it detects music content that has a noise. The digital broadcast recording apparatus according to claim 1,
The relevance record management unit is associated with the second viewing main content, which is the viewing main content received in the past, belonging to the same group as the first viewing main content that is the processing target viewing main content. If the viewing sub-content has already been recorded, the first viewing sub-content including the music content related to the video of the first viewing main content is converted to the second viewing main content. A digital broadcast recording apparatus characterized in that it is divided into the same group as the second viewing sub-content including music content related to the video . The digital broadcast recording apparatus according to claim 3 , wherein
The relevancy record management unit compares the program name assigned to the first viewing main content with the program name assigned to the second viewing main content, so that both belong to the same group. A digital broadcast recording apparatus characterized by identifying whether or not. A view for main content including video content even without least that having a continuity on the time axis as a series of stream information, and the sub-contents for viewing including at least music content having relevance to the view for main content A digital broadcast recording method for performing control to receive the main content for viewing and the secondary content for viewing and record the data for viewing when transmitted from a predetermined transmission station as digital broadcast data,
The main content for viewing and the secondary content for viewing are received independently, and the first time zone indicating from the start to the end regarding the distribution time or playback time of the received main content for viewing, and the received viewing secondary content When at least a part of the second time zone is included in the first time zone according to the relationship with the second time zone representing from the start to the end regarding the distribution time or playback time of the content, A digital broadcast recording method, wherein the music content of the viewing sub-content and the video content of the viewing main content are recorded in association with each other.