JP5203033B2 - Broadcast receiver - Google Patents

Description

  The present invention relates to a digital broadcast broadcast receiving apparatus, and more particularly to a multi-organization broadcast in which one main program and one or more sub-programs are broadcast at the same time on a single channel. The present invention relates to a broadcast receiving apparatus in which only a desired program is recorded and the memory use capacity of the broadcast receiving apparatus is suppressed, and the tolerance to reception errors is enhanced.

  In ISDB-T (Integrated Services Digital Broadcasting for Terrestrial) terrestrial digital television broadcasting operated in Japan, the transmission band of one channel is divided into 13 segments, of which 12 segments are terrestrial. Assigned to digital broadcasting. A high-definition program for one channel is broadcast using all 12 segments. In addition, “multi-organized broadcasting” is performed in which 12 segments are divided and a standard-definition program for up to 3 channels is broadcast at the same time.

  The multi-organized broadcast program (multi-organized program) is composed of one main program defined by the default ES and one or more sub-programs. Here, the configuration of the multi-organized program will be briefly described with reference to the drawings. FIG. 5 is a diagram showing an example of an electronic program guide (EPG) when a multi-organized program exists. As described above, the multi-organization broadcasting is a digital broadcasting in which a maximum of three programs with a standard image quality are broadcast in a band corresponding to one channel for broadcasting one program with a normal high-definition image quality. In the program table shown as an example in FIG. 5A, a broadcast station having channel number 2 (2ch) broadcasts a multi-organized program composed of three programs in a time zone of 10:00 to 11:00. In addition, a broadcasting station having channel number 4 (4ch) broadcasts a multi-organized program composed of three programs in the same time period from 11: 00 to 12:30. In other time zones, each broadcasting station broadcasts one program (single program). FIG. 5B shows details of the list T1 of the portion surrounded by a broken line in the program table shown in FIG. In the case of FIG.5 (b), the broadcasting station which has the channel number 2 broadcasts the program A which is a single program in the time slot | zone of 9:00 to 10:00. Thereafter, this broadcasting station broadcasts the multi-organization program in the time zone from 10:00 to 11:00. That is, the band for one channel is divided into three subchannels (21ch, 22ch, and 23ch), and programs B-1, B-2, and B-3 are broadcast on each subchannel. Also, from 11:00, the multi-organization is finished and the program C, which is a single-organized program, is broadcast. A multi-organized program can be broadcast continuously, and an example of an EPG in this case is shown in FIG. As shown in FIG. 5 (c), it is of course possible to continuously broadcast the multi-programmed program programs C-1 and C-2 after the multi-programmed programs (B-1, B-2 and B-3) are completed. is there.

  In terrestrial digital broadcasting, video data, audio data, caption data, data broadcasting, and broadcast service PSI (Program Specific Information) / SI (Service Information) (program specific information / program arrangement information) are transport streams. The packets are divided into packets called TS packets (Transport Stream Packets), which are multiplexed in a time division manner in the MPEG2-TS (Transport Stream) format and broadcast as a single transport stream (TS). Individual identification information called PID (Packet ID) is given to the header of each TS packet including the divided video data and audio data for each data type and service (program). Based on the PID and PSI / SI, it is possible to determine a TS packet including video data and audio data of a service (program).

  In the above-mentioned multi-organized program, a packet including video data, audio data, caption data, etc. (media data) constituting a main program and a packet including media data constituting a sub-program are broadcast together in a TS. The Discrimination of TS packets including media data constituting the main program and the subprogram is performed based on PSI / SI such as PMT (Program Map Table), NIT (Network Information Table), PAT (Program Association Table) and the like. (Details will be described later). Note that media data necessary for viewing each service of the main program and the subprogram may be independent for each program, or may be common to each program. This will be described with reference to the drawings. FIG. 6 is a diagram for explaining the relationship between TS packets constituting a main program and a subprogram of a multi-organization program. As shown in FIG. 6, control data (NIT, PMT, etc.) is common among the control information and media data group MS constituting the main program and the control information and media data group SS constituting the subprogram. 6A when the media data constituting the main program and the subprogram are independent, and FIG. 6B when the common media data is used. FIG. 6B shows, for example, the case where the content of the main program is broadcast with sub audio (audio 2) in the sub program.

  Here, a method for defining the main program and the subprogram in the multi-organization broadcasting will be described. According to ARIB (Association of Radio Industries And Businesses), information related to multi-organization broadcasting (control information) is described in a component group descriptor in an EIT (Event Information Table). Note that EIT is one of SI and describes information related to the program such as the name of the program, broadcast date and time, and description of the contents. 7 and 8 show schematic diagrams of the data structures of the EIT and component group descriptors, respectively. As shown in FIG. 7, the component group descriptor is described in the EIT. In the component group descriptor shown in FIG. 8, a component group ID (component_group_ID) is assigned to each program (main program and subprogram) constituting the multi-organized program. A program whose component group ID value is “0x0” is a main program, and other programs are subprograms.

  A PMT (Program Map Table) is used to discriminate TS packets including media data such as video, audio, and subtitles constituting each program of the multi-organized program. FIG. 9 shows a schematic diagram of the data structure of the PMT. In a multi-organized program, a component tag (component_tag) that identifies the type of media data (type of video, audio, subtitles, etc.) constituting the program to which the component group ID is assigned is described for each component group ID. The As shown in FIG. 9, the PMT that is one of the PSIs describes a PID corresponding to the component tag, and has a PID corresponding to the component tag related to the component group ID of the desired program from the PMT. TS packets can be discriminated. On the receiving side, a TS packet including media data of a desired program is received, and the program is reproduced (audio / image output) from video, audio, caption data, etc. included in the TS packet.

  In recent years, some broadcast receiving apparatuses having a function of recording digital broadcasts record received TS in the MPEG2-TS format (stream format). When recording the above-mentioned multi-organized program with such a broadcast receiving apparatus, when recording all received TS, that is, when recording all TS of all subchannels that broadcast the main program and subprogram, It is conceivable that only the sub-channel TS that broadcasts the program to be broadcast (main program and / or sub-program) is selected and recorded. In the latter case, there is an advantage that the memory of the recording apparatus can be saved. For example, in the example shown in FIG. 6A, when the user desires to record only the subprogram, the TS packet including “video 1”, “audio 2”, and “subtitle 1” constituting the main program is recorded. do not have to. In the case of FIG. 6B as well, it is not necessary to record a TS packet including “caption 1” that is not common to the subprogram among TS packets constituting the main program. By recording only the desired TS packet, the memory of the recording device can be saved.

  As described above, as a technique for recording only a program selected at the time of recording a multi-organized program, Patent Document 1 deletes a packet related to a program not selected by a user from among multiplexed MPEG2-TS, It is disclosed to generate a new PSI / SI and reconfigure the TS.

JP-A-11-239186

  However, there are some problems when only the sub-channels of a multi-organized program are recorded. This will be described with reference to the drawings. FIG. 10 is a diagram for explaining a problem that may occur when only the subchannel is recorded. Here, FIG. 10A is an outline of a TS including TS packets including PMT and media data constituting each program broadcast from 10:00 to 12:00 in the program table shown in FIG. FIG. The numerical value in the TS packet indicates PID. FIG. 10B is a schematic diagram of a TS recorded when only a subchannel is recorded by a conventional broadcast receiving apparatus. Here, the user desires to record hatched “program B-1” and “program C-2” in the program table shown in FIG.

  First, in order to receive the TS packet of the subchannel to be recorded, it is necessary to refer to the PMT as described above. However, when a communication error such as packet loss occurs due to the deterioration of the radio wave propagation environment, there is a possibility that a packet including the PMT is lost. During this packet loss period, there is a risk of losing the PMT indicating the PID that identifies the video or audio TS packet of the service to be recorded. For example, as shown in FIG. 10A, the PIDs of TS packets (P6 to P9) and TS packets related to “program C-1” and “program C-2” broadcasted after 11:00 are specified. Assume that a packet of PMT (PMT2) is lost. In this case, conventionally, a TS packet having “100 (video)”, “101 (voice 1)”, and “102 (voice 2)” which are PIDs of “program B-1” specified by PMT1, and PMT3 Only TS packets having PIDs “400 (video)”, “401 (audio 1)”, and “402 (audio 2)” of the “program C-2” specified by the above are recorded. Therefore, the recorded TS is as shown in FIG. That is, because PMT2 is lost, TS packets (P10, P11, and P13) of “program C-2” that should be recorded cannot be recorded even though they can be received.

  Thus, even if the reception state is recovered and the TS packet (P10, P11, etc.) of “program C-2” is started, the PMT2 is lost, so that the “program C-2” to be recorded by the TS packet is lost. Since it is not possible to specify whether or not the TS packet is “”, it cannot be recorded. If the transmission interval of the PMT is shortened on the transmission side, the PMT update can be handled relatively quickly even if a packet is temporarily lost on the reception side. However, the shorter the transmission interval of the PMT, the more the broadcast band is compressed. The bit rate for sending other data will be lowered. Also, for example, H.264, which is a compression encoding method for moving image data recommended by ITU (International Telecommunication Union) used in One Seg or the like. In MPEG systems such as H.264 / AVC, the compression rate is increased by adopting inter-frame compression using I frames (reference frames) and P frames. However, since the P frame is created based on the I frame, if a packet including the I frame is lost, the video cannot be completely restored even if the P frame depending on the I frame is received. Therefore, when a TS packet containing an I frame is lost, even if a TS packet to be recorded can be newly received by receiving a PMT, video data cannot be reproduced until the next I frame is received. It lacks usability.

  Accordingly, an object of the present invention is to solve the above-mentioned problems and to record only a program desired by a user among a plurality of programs constituting a multi-organized program and suppress the recording capacity used by the broadcast receiving apparatus. On the other hand, an object of the present invention is to provide a broadcast receiving apparatus with improved resistance to reception errors.

In order to solve the above-described problems, the broadcast receiving apparatus according to the present invention provides:
A broadcast receiving device for digital broadcasting corresponding to multi-organized broadcasting for broadcasting a multi-organized program including a plurality of programs included in a single stream signal,
A receiver for receiving the stream signal;
A storage unit for storing the stream signal received by the receiving unit;
An extraction unit that extracts a stream signal (substream signal) of a program (one or more) to be recorded among a plurality of programs included in the multi-organization broadcast from the stream signal received by the reception unit;
A determination unit for determining a reception state of the reception unit;
Recording that stores only the stream signal extracted when the reception state determined by the determination unit is good in the storage unit, and stores all the stream signals received when the reception state deteriorates in the storage unit A control unit;
It is characterized by comprising.

In addition, a broadcast receiving apparatus according to an embodiment of the present invention includes:
The stream signal is
Including a plurality of control information packets inserted at a predetermined period and having control information (PSI / SI such as PMT, NIT, EIT) for specifying stream packets of a plurality of programs constituting the multi-organized broadcast,
The recording control unit
Of the stream packets stored in the storage unit and included between two consecutive control information packets, the stream packet relating to the program to be recorded, which is specified based on the control information included in the two control information packets Delete other stream packets from the storage unit,
It is characterized by that.

Furthermore, a broadcast receiving apparatus according to another embodiment of the present invention includes:
The recording control unit
When the control information included in the two control information packets is different, the program to be recorded specified based on the control information included in the control information packet positioned later in the stream signal of the two control information packets. A stream packet that is duplicated and inserted immediately after the stream packet located at the head of the identified stream packet between the two control information packets.
It is characterized by that.

  As described above, the solution of the present invention has been described as an apparatus. However, the present invention can be realized as a method, a program, and a storage medium storing the program, which are substantially equivalent thereto, and the scope of the present invention. It should be understood that these are also included. Note that each step of the method or program uses an arithmetic processing unit such as a CPU or a DSP as necessary in data processing, and the input data, processed / generated data, etc. are stored in an HDD, memory, etc. Is stored in the storage device.

  As described above, according to the present invention, only the program desired by the user is recorded among a plurality of programs constituting the multi-organized program, and the recording capacity used by the broadcast receiving apparatus is suppressed, and resistance to reception errors is increased. It is possible to provide an enhanced broadcast receiving apparatus.

  Hereinafter, a broadcast recording apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. In the following, a description will be given assuming that the broadcast recording apparatus is a stationary type, but the present invention is not limited to this, and a mobile portable receiving terminal (mobile) capable of receiving and recording 1-segment broadcasting. Note that the present invention can also be applied to telephones, PDAs (personal digital assistance), and the like. In the following description, “recording” and “recording” are used synonymously to mean “storage of stream signal (TS) in storage unit”.

  FIG. 1 is a functional block diagram of a broadcast receiving apparatus according to the present invention. The broadcast receiving apparatus 100 includes an antenna ANT, a receiving unit 110, a demultiplexer 120, a video decoder unit 130, a caption decoder unit 140, an audio decoder unit 150, a display unit DIS, a speaker SP, a reception quality determination unit 160, an extraction unit 162, and a storage. A unit (flash memory or the like) 170, a control data processing unit 180, a control unit 190, an instruction input unit KEY, and a system bus SB. Furthermore, the storage unit 170 includes a stream storage unit 172. The control unit 190 includes a recording control unit 192 and a playback control unit 194.

  The antenna ANT receives a digital terrestrial broadcast signal (RF signal). The receiving unit 110 tunes (frequency converts) the RF signal received by the antenna ANT based on a frequency (channel) designation command from the control unit 190. The channel designation command from the control unit 190 is generated based on the channel designated by the user using the instruction input unit KEY or the like. Furthermore, the receiving unit 110 demodulates the tuned RF signal into an MPEG2-TS format TS (Transport Stream) signal.

  The demultiplexer 120 separates the TS packet included in the TS signal into an audio packet, a video packet, a data broadcast packet, and PSI / SI based on the packet ID (PID) in the demodulated TS signal. That is, the broadcast data received by the antenna ANT is separated into video information, audio information, caption information, and control information. The separated video packet is output to the video decoder unit 130, the data broadcast packet is output to the caption decoder unit 140, and the audio packet is output to the audio decoder unit 150. The audio decoder unit 150 decodes the audio data in the input audio packet and outputs it to the speaker SP. The video decoder unit 130 and the subtitle decoder unit 140 decode the video data in the input video packet and the subtitle data in the data broadcast packet, respectively, and output them to the display unit DIS. The display unit DIS displays a data broadcast screen, an electronic program guide (EPG), and a program video based on BML (Broadcast Markup Language) in the input data broadcast packet.

  The reception quality determination unit 160 determines the reception state of the reception unit 110. This reception state determination can be made based on, for example, the reception interval of TS packets, the power level of the received signal, the bit error rate, the continuity index (continuity_counter) included in the header of the TS packet, and the like. The extraction unit 162 receives a stream signal (hereinafter also referred to as a “substream signal”) of one or more programs to be recorded among a plurality of programs included in the multi-organization broadcast by the reception unit 110. Extract from the stream signal. Specifically, referring to EIT and PMT, for example, a PID related to a program to be recorded designated by the user is specified, and only TS packets having the PID are extracted from the stream signal. The stream storage unit 172 stores a stream signal including program data and control information in a stream format. Note that the stream storage unit 172 also stores the substream signal extracted by the extraction unit 162 in a stream format. The control information processing unit 180 performs a predetermined process on the control information included in the recorded stream signal. The recording control unit 192 performs an instruction of a program to be recorded (recorded), and determination operations during and after the recording process described below. The reproduction control unit 192 controls reproduction of the recording data stored in the recording data storage unit 172. The instruction input unit KEY accepts input from the user such as a recording instruction or a reproduction instruction.

  Next, recording processing according to an embodiment of the broadcast receiving apparatus of the present invention will be described based on a flowchart. 2 and 3 are flowcharts showing an example of recording processing of the broadcast receiving apparatus 100 according to the present invention. When the user gives an instruction to start recording of the multi-organized program, or when it is the broadcast time of the multi-organized program that has been reserved for recording, the broadcast receiving apparatus 100 starts the recording process. In the case of reserved recording, information related to a program reserved for recording by the user in advance via the instruction input unit KEY or the like is stored in the storage unit 170. First, based on an instruction from the recording control unit 192, the receiving unit 110 receives a broadcast wave of a multi-organized broadcast including a subchannel to be recorded. Furthermore, the receiving unit 110 demodulates the tuned RF signal into a TS (Transport Stream) signal in the MPEG2-TS format, and the demultiplexer 120 uses the TS signal based on the packet ID (PID) in the demodulated TS signal. Are separated into audio packets, video packets, data broadcast packets, and PSI / SI (step S11). Next, the reception quality determination unit 160 determines whether or not the reception state is good based on the power level of the broadcast wave received by the reception unit 110 (step S12). If it is determined that the reception state is good, the reception state mode (MODE) is set to “1” (step S13). If it is determined that the reception state is not good, the reception state mode (MODE) is set to “0” (step S14). The reception state mode (MODE) is stored in the storage unit 170.

  Thereafter, the extraction unit 162 determines whether or not an updated PMT, that is, a PMT in which control information different from the control information described in the latest PMT received before is received (step S15). . The PMT is updated when the service configuration is changed. If it is not an updated PMT, the process proceeds to step S17. When the updated PMT is received, the extraction unit 162 extracts the PID of the program broadcast on the subchannel to be recorded, described in the updated PMT (step S16). Thereafter, the process proceeds to step S17, and the recording control unit 192 determines whether or not the reception state mode (MODE) is “1”, that is, determines whether or not the current reception state is good. When the reception state is good, the recording control unit 192 determines whether the TS packet received by the reception unit 110 is necessary for recording a desired subchannel, that is, the PID of the TS packet is the extraction unit 162. It is determined whether or not it has the PID of the program to be recorded extracted by (step S18). If the TS packet has the PID of the program to be recorded, the recording control unit 192 stores the received TS packet in the stream storage unit 172 in a stream format (step S19). When the reception state mode (MODE) is “0” in step S17, the recording control unit 192 stores the received TS packet in the stream storage unit 172 regardless of whether the received TS packet is related to the program to be recorded. (Step S19). Thereafter, the recording control unit 192 records the received TS packet in the stream storage unit 172 until the scheduled recording end time is reached or until it is determined that the user has instructed to end the recording in step S20. (Steps S11 to S20) are performed. If the reception state is good and the possibility of packet loss is low by the above processing, only the TS of the program of the desired subchannel is stored in the stream recording unit 172, and if the possibility of packet loss is high, All the received multi-organization broadcast TSs can be stored in the stream recording unit 172.

  An example of the TS stored in the stream storage unit 172 after the above-described recording process is shown in FIG. Here, FIG. 4 (a) is an outline of a TS including TS packets including PMT and media data constituting each program broadcast from 10:00 to 12:00 in the program table shown in FIG. 5 (c). FIG. The numerical value in the TS packet indicates PID. FIG. 4B is a schematic diagram of a TS recorded when a multi-organized program is recorded by the above-described recording process when the reception state is not good. Here, the user desires to record the hatched “program B-1” and “program C-2” in the program table shown in FIG. Since the reception state is not good, in the example of FIG. 4A, in addition to the TS packet (P2, P4) of “program B-1” (PID = 100, 101, 102) to be recorded, “program B-2 "(PID = 200, 201) TS packets (P1, P3, P5) are also recorded. Then, TS packets P6 to P9 and PMT (PMT2) are lost, and then received TS packets (P10 to P15) and PMT (PMT3) are recorded.

  Since the only programs to be recorded are “program B-1” and “program C-2”, storing TS packets of other programs is a waste of storage capacity. Therefore, the broadcast receiving apparatus according to the present invention performs “compression processing” in which only TS packets of “program B-1” and “program C-2” to be recorded are extracted and other TS packets are deleted. At this time, since the PMT (PMT2) has lost a packet, the PID of “program C-2” cannot be specified, and unlike the conventional technique in which the TS packets (P10, P11, and P13) to be recorded cannot be recorded. According to the present invention, these TS packets can also be recorded. Hereinafter, the compression process will be described.

When the recording ends in step S20 in FIG. 2, the process proceeds to step S21, and the TS stored in the stream storage unit 172 is compressed. FIG. 3 is a flowchart illustrating an example of the compression process. Here, assuming that the TS stored in the stream storage unit 172 is the TS shown in FIG. 4A described above, the flowchart of FIG. 3 will be described with reference to FIG. First, the initial value of the count value N is set to 0 (step S30). Next, the recording control unit 192 starts reading the recording data (TS packet) stored in the stream storage unit 172, and determines whether or not the read TS packet is a PMT (steps S31 and S32). If it is determined that it is not PMT, the process returns to step S31, and the next TS packet is read. If it is determined in step S32 that it is a PMT, the count value N is incremented by 1, and the position of the PMT is marked as “Mark _N ” (steps S33 and S34). Thereafter, the recording control unit 172, the PMT was marked as "Mark _N" is determined whether the updated from the PMT was marked as "Mark _N-1" (step S35). 4A, the PMT (PMT3) is marked as the reading position “Mark _N ” in step S34, and is updated from the PMT (PMT1) of “Mark _N−1 ” in step S35. It is determined that

If it is determined in step S35 that the PMT of “Mark _N-1 ” has been updated, the extraction unit 162 determines the PID (PID _N ) of the program to be recorded, which is specified by the PMT of “Mark _N ”. Extract (step S36). Here, PID _N indicates a set of PIDs described in the PMT. For example, in the example of FIG. 4A, the PID _N of “program C-2” to be recorded described in the PMT (PMT3) is “400”, “401”, and “402”. Thereafter, the recording control unit 172 returns the TS packet reading position to the previous mark position “Mark _N−1 ”, and reads the PID of the TS packet (steps S37 and S38). In FIG. 4A, the reading position is returned to PMT (PMT1), and reading is started from the TS packet P2. Thereafter, the recording control unit 172, the read TS packets continued determination of whether it has a PID _N (step S39, S40), if it is determined that the TS packet having a PID _N, immediately before the TS packet The “Mark _N ” PMT copied by the control information processing unit 180 is inserted (step S42). In the example of FIG. 4A, it is determined in step S39 that the TS packet P10 is a TS packet having PID _N , and the PMT (PMT4 including the same control information as the PMT (PMT3) is immediately before the TS packet P10. ) Is inserted.

Next, among the TS packets in the PMT section inserted from the PMT of “Mark _N−1 ”, the TS packets having PIDs other than PID _N−1 are deleted, and the PMT section of “Mark _N ” from the inserted PMT TS packets having PIDs other than PID _N are deleted from the TS packets. 4A, after inserting the PMT (PMT4), among the TS packets between the PMT1 and PMT4, the PID _{N of} “program B-1” to be recorded specified by the PMT (PMT1) TS packets (P3, P5) having PIDs other than ₋₁ (“100”, “101”, “102”) are deleted. In addition, among TS packets between PMT4 and PMT3, PIDs other than PID _N (“400”, “401”, “402”) of “program C-2” to be recorded specified by PMT (PMT3) are included. The TS packet (P12) is deleted. Therefore, the TS stored in the stream storage unit 172 is as shown in FIG. At the time of reproduction, switching from “program B-1” to “program C-2” can be performed based on the copied PMT (PMT4).

If it is not determined that there is a TS packet having PID _N in step S39 and the PMT of “Mark _N ” is read (step S40), the PMT of “Mark _N−1 ” to the PMT of “Mark _N ” TS packets having PIDs other than PID _N-1 are deleted (step S41). This is processing when there is no packet loss of the PMT updated from the PMT received immediately before. The example of FIG. 4A corresponds to the case where PMT (PMT2), which is the first PMT updated from PMT (PMT1), can be received without loss. (Because the PID described in PMT2 before PMT2 is not received.)

  After that, in step S44, the above-described compression process is continued until the recording control unit 172 determines that the TS packet stored in the stream storage unit 172 has been read. When the recording control unit 172 finishes reading the TS packet, the compression process ends. The TS stored in the stream storage unit 172 by the above-described compression processing is only the TS related to the program to be recorded as shown in FIG. 4B, for example. In this way, unlike the conventional technique of recording only TS of a desired subchannel, according to the present invention, when there is a possibility of packet loss, all multi-organized broadcast TSs are recorded. Then, only the TS of the desired subchannel is extracted. In this way, it is possible to record TS packets that could not be recorded in the past while suppressing the storage capacity. Therefore, as compared with the prior art, the opportunity for the user to view a desired program is increased, and a broadcast receiving apparatus with excellent usability can be provided.

  In the above-described embodiment, a mode has been described in which the TS packet other than the program to be recorded is not stored in the storage unit when the reception quality of the stream signal received by the receiving unit 100 is good. However, the present invention is not limited to this, and TS packets may be associated with the reception state mode (MODE) at the time of reception and stored in the storage unit, and may be deleted after recording. Even when the program is viewed in real time, buffering of the TS packet being received to the storage unit is started from the time when the reception state deteriorates, and the processing of this embodiment is performed on the buffered TS packet. However, it is possible to reduce the loss of viewing opportunities due to the loss of the PMT. Moreover, although the above-mentioned Example demonstrated the aspect in which the update of PMT arises when the program structure of multi organization broadcast is changed, this invention is not limited to this. Therefore, the present invention can be applied even when the PID is changed in the same program and the PMT is updated based on the PID.

  The advantages of the present invention will be described again. As described above, according to the broadcast receiving apparatus of the present invention, only the TS of the program desired by the user among the plurality of programs constituting the multi-organized program and the TS of all multi-organized programs are selected according to the reception state. Switching between recordings. Therefore, unlike a conventional technique, even if a TS packet including control information is lost, it is possible to record a TS packet of a program to be recorded described in the lost control information. Furthermore, even if TSs of all multi-organized programs are stored in the storage unit, only the TSs of the desired programs can be extracted, so that storage capacity is not wasted due to unnecessary TSs. Further, at the time of recording, since the stream format is not lost by inserting the control information in which the packet is lost, it is possible to reproduce without any problem.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each component, each means, etc. can be rearranged so as not to be logically contradictory, and a plurality of components can be combined into one or divided.

It is a functional block diagram of the broadcast receiving apparatus by this invention. It is a flowchart which shows an example of the recording process of the broadcast receiving apparatus 100 by this invention. It is a flowchart which shows an example of the recording process of the broadcast receiving apparatus 100 by this invention. It is a figure which shows TS of the control information and program which were stored in the stream memory | storage part 172. FIG. It is a figure which shows an example of an electronic program guide (EPG) in case a multi organization program exists. It is a figure explaining the relationship of the TS packet which comprises the main program and subprogram of a multi-organization program. It is the schematic of the data structure of EIT. It is the schematic of the data structure of a component group descriptor. It is the schematic of the data structure of PMT. It is a figure explaining the problem which may occur when only a subchannel is recorded by a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Broadcast receiver 110 Receiving part 120 Demultiplexer 130 Video decoder 140 Subtitle decoder 150 Audio decoder 160 Reception quality judgment part 162 Extraction part 170 Storage part 172 Stream storage part 180 Control information processing part 190 Control part 192 Recording control part 194 Playback control part DIS display unit SP speaker KEY instruction input unit SB system bus ANT antenna P1 to P15 TS packet PMT1 to 4 PMT
Part of T1 EPG Data group composing MS main program SS Data group composing sub program

Claims (3)

A broadcast receiving device for digital broadcasting corresponding to multi-organized broadcasting for broadcasting a multi-organized program including a plurality of programs included in a single stream signal,
A receiver for receiving the stream signal;
A storage unit for storing the stream signal received by the receiving unit;
An extractor for extracting a stream signal of a program to be recorded from a plurality of programs included in the multi-organized broadcast from the received stream signal;
A determination unit for determining a reception state of the reception unit;
Recording that stores only the stream signal extracted when the reception state determined by the determination unit is good in the storage unit, and stores all the stream signals received when the reception state deteriorates in the storage unit A control unit;
A broadcast receiving apparatus comprising: The broadcast receiving device according to claim 1,
The stream signal is
Including a plurality of control information packets inserted at a predetermined cycle and having control information for specifying stream packets of a plurality of programs constituting the multi-organized broadcast,
The recording control unit
Of the stream packets stored in the storage unit and included between two consecutive control information packets, the stream packet relating to the program to be recorded, which is specified based on the control information included in the two control information packets Delete other stream packets from the storage unit,
A broadcast receiver characterized by that. The broadcast receiving device according to claim 2,
The recording control unit
When the control information included in the two control information packets is different, the program to be recorded specified based on the control information included in the control information packet positioned later in the stream signal of the two control information packets. A stream packet that is duplicated and inserted immediately after the stream packet located at the head of the identified stream packet between the two control information packets.
A broadcast receiver characterized by that.

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