JP2009296085A - Digital broadcast receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the tuning time without mounting an additional module for transmitting and receiving information predicted by a microcomputer on each receiver by preparing a plurality of digital broadcast receivers so as to reduce the tuning time in tuning of the digital broadcast receiver. <P>SOLUTION: While the digital broadcast receiver uses external input, tuning information is acquired. When a state is changed from an external input state to a viewing state, the receiver control unit simultaneously sets a plurality of filterings to a TS processing part using the already acquired tuning information, and acquires the tuning information independent of an acquisition order. Thus, the time until the tuning information is acquired is reduced and the tuning time is reduced. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technique for shortening the channel selection time of a terrestrial digital broadcast receiver or a BS / CS digital broadcast receiver.

  In digital broadcasting, an analog audio video signal is broadcast after being digitally compressed, so that it is necessary to decompress and decode the analog audio video signal into the original analog audio video signal. In digital broadcasting, many functions such as high-definition, high-quality sound, multi-function audio, electronic program guide, program information, data broadcasting, etc. have been added, and these information are incorporated into digitized broadcast waves. Yes. For this reason, when broadcast waves are received, it is necessary to extract stream information and perform packet analysis to obtain target information. Therefore, it is a problem that the time from when the user selects a channel with the remote controller until the program can be viewed becomes much longer than when the analog broadcast is received.

  In addition, since the time required for this decompression decoding is long, it is a problem that the time from when the user selects a channel with the remote controller until the program can be viewed becomes much longer than when analog broadcasting is received. A prominent example of this problem is that the user waits for a long time each time the program is switched when the user sequentially switches the program and checks the program contents.

  As a technique for shortening the channel selection time of a digital broadcast receiver, for example, there is one described in Patent Document 1. In Patent Literature 1, a plurality of digital broadcast receivers are connected via a network, and a program to be selected next by a user is predicted using a microcomputer in the digital broadcast receiver, and a receiver that is not used for viewing is used. Is instructed to select the predicted program, and the decoded video / audio data is obtained there. If the program selected by the user matches the program predicted using the microcomputer, the program selected by the receiver that is not used for viewing is displayed on the monitor of the digital broadcast receiver. Reduce time.

JP 2006-157696 A

  However, in the prior art, in order to shorten the channel selection time, a plurality of digital broadcast receivers are used, and each receiver needs to be separately equipped with a module for transmitting and receiving information for channel selection.

  The present invention has been made in view of the above problems, and its purpose is to use an external input of a digital broadcast receiver in an environment in which a digital broadcast receiver and an AV (Audio Visual) device are connected. During this period, PAT (Program Association Table) and PMT (Program Map Table) are collected using an unused tuner of the digital broadcast receiver. When switching from external input to viewing, the PAT and PMT information is used. In addition, the PAT, PMT, ECM (Entitlement Control Message), video PES (Packetized Elementary Stream), audio PES, and subtitle PES acquisition settings are started at the same time, so that the program from the TS (Transport Stream) received by the digital broadcast receiver It is an object of the present invention to provide a technique for efficiently collecting information constituting the channel and shortening the channel selection time without using a device-specific protocol.

  In order to achieve the above object, the present invention provides the following techniques.

  That is, a digital broadcast receiver that realizes a reduction in channel selection time according to the present invention includes a control signal input unit, a receiver control unit, a tuner control unit, a TS processing unit, a channel selection information collection unit, and a channel selection information collection unit. A station information storage unit, and when receiving a request for switching from the control signal input unit to the external input, the receiver control unit notifies the channel selection information collection unit of the occurrence of the external input switching request.

  The channel selection information collection unit reads out the reception frequency from the channel selection information storage unit while using an external input, and sets it in the tuner control unit. The channel selection information collection unit sets the PAT PID (Packet Identifier) in the TS processing unit, acquires the PAT from the TS processing unit, sets the PMT PID in the TS processing unit, and performs the TS processing. Get PMT from the department.

  In addition, the channel selection information collection unit includes the PAT version number acquired from the TS processing unit, the PAT CRC, the PMT version number, the PMT CRC, the ECM PID, the video PES PID, the audio PES PID, and the subtitle. The channel selection information including the PID of the PES is stored in the channel selection information storage unit, and the reception frequency held by the channel selection information collection unit for resuming the process of collecting the channel selection information is updated.

  When the receiver control unit switches from external input to viewing, the receiver control unit acquires channel selection information from the channel selection information storage unit, and simultaneously sets the channel selection information in the TS processing unit. The TS processing unit has a function of acquiring any one of PAT, PMT, ECM, video PES, audio PES, and subtitle PES set by the receiver control unit in the order in which the tuner has been received. To do.

  According to the above configuration, the channel selection information can be acquired from the TS processing unit while the receiver control unit is using the external input. In addition, when the receiver control unit switches from external input to viewing, the channel selection information is simultaneously set in the TS processing unit, and the TS processing unit can receive the tuner without depending on the order of the channel selection information. The channel selection information can be acquired in the order in which they are selected.

  As a result, it is possible to shorten the tuning information acquisition waiting time and shorten the tuning time.

  As described above, the digital broadcast receiver of the present invention can shorten the waiting time for acquisition of channel selection information from the TS processing unit, and can shorten the channel selection time. For this reason, the usability of the digital broadcast receiver is improved.

  An embodiment of the present invention will be described in detail with reference to FIGS.

  FIG. 1 shows a first embodiment of a digital broadcast receiver according to the present invention. The digital broadcast receiver 1 in this embodiment includes a receiver control unit 101, a control signal input unit 102, a setting information storage unit 103, a tuner control unit 104, a tuner 105, a channel selection information storage unit 106, a TS processing unit 107, B A CAS (BS-Conditional Access System) card 108, a descrambler 109, a decode control unit 110, an output control unit 111, a display switching control unit 112, and a channel selection information collection unit 113.

  The receiver control unit 101 controls the digital broadcast receiver 1 and has a normal viewing state, an external input state, and a power OFF state, and transitions between the states. Here, the normal viewing state indicates a state in which the video / audio received by the digital broadcast receiver 1 is output to the display 2. The external input state indicates a state in which video / audio output of an AV device or the like connected to the digital broadcast receiver 1 is received from the external input of the digital broadcast receiver 1 and is output to the display 2.

  When receiving the service ID from the control signal input unit 102 together with the channel selection request in the normal viewing state, the receiver control unit 101 stops the video / audio output of the output control unit 111 and performs the filtering process of the TS processing unit 107. The reception frequency corresponding to the received service ID is acquired from the setting information storage unit 103, and the channel selection information corresponding to the service ID is acquired from the channel selection information storage unit 106.

  Here, the filtering process means that the receiver control unit 101 sets the PID of the section or the PID of the PES in the TS processing unit 107, and the TS processing unit 107 sets the PID of the section set in the TS processing unit 107, or A process of acquiring from the tuner 105 a TS packet that matches the PID of the PES is shown.

  Here, the channel selection information includes PAT version number, PAT CRC, PMT PID, PMT version number, PMT CRC, ECM PID, video PES PID, audio PES PID, and subtitle PES. Section data including PID and PES data are shown.

  The receiver control unit 101 sets the reception frequency corresponding to the service ID in the tuner control unit 104, and simultaneously starts the filtering setting of channel selection information in the TS processing unit 107.

  When receiving the PAT and PMT, the TS processing unit 107 sets the PAT and PMT in the receiver control unit 101.

  More specifically, the receiver control unit 101 selects one of the PAT version number acquired from the TS processing unit 107, the PAT CRC, the PMT version number, and the PMT CRC, and the PAT acquired from the channel selection information storage unit 106. If any of the version number, the CRC of the PAT, the version number of the PMT, or the CRC of the PMT is changed, the version number of the PAT of the receiver control unit 101, the CRC of the PAT, the version number of the PMT, and the CRC of the PMT are changed to TS. The channel selection information corresponding to the service ID in the channel selection information storage unit 106 is updated with the channel selection information acquired from the TS processing unit 107 by updating with the PAT and PMT acquired from the processing unit 107.

  When receiving the ECM, the TS processing unit 107 sets the ECM in the B-CAS card 108 and acquires a decryption key necessary for descrambling.

  When receiving the video PES, the audio PES, and the caption PES, the TS processing unit 107 generates a video ES, an audio ES, and a caption ES from the video PES, the audio PES, and the caption PES, and the video ES, the audio ES, and the caption ES. Each PTS (Presentation Time Stamp) is set in the receiver control unit 101, and the video ES, audio ES, caption ES, and decryption key of each ES are set in the descrambler 109.

  The receiver control unit 101 holds the video ES, audio ES, and subtitle ES PTSs until the display is completed.

  The descrambler 109 performs descrambling processing of the video ES, audio ES, and subtitle ES, and sets the descrambled video ES, audio ES, and subtitle ES in the TS processing unit 107.

  The TS processing unit 107 sets the descrambled video ES, audio ES, caption ES, and each DTS (Decoding Time Stamp) in the decoding control unit 110.

  The decode processing unit 110 decodes the video ES, the audio ES, and the caption ES based on the DTSs of the video ES, the audio ES, and the caption ES, and sets the decoding result in the output control unit 111.

  The receiver control unit 101 sets the video / audio output timing based on the decoding result and each PTS, and the output control unit 111 outputs the decoding result video / audio to the display 2 based on each PTS.

  In addition, when the receiver control unit 101 receives an external input switching request from the control signal input unit 102, the receiver control unit 101 sets input switching in the display switching control unit 112. When the receiver control unit 101 switches from the normal viewing state to the external input state, the channel selection information collection unit 113 receives the reception frequency for resuming the process of collecting channel selection information from the channel selection information storage unit 106. And the reception control frequency is set in the tuner control unit 104.

  The channel selection information collection unit 113 performs PAT filtering setting in the TS processing unit 107, acquires the PAT from the TS processing unit 107, and stores the PAT in the channel selection information collection unit 113.

  The channel selection information collection unit 113 performs PMT filtering setting in the TS processing unit 107 and acquires the PMT from the TS processing unit 107. Further, the channel selection information collection unit 113 stores the channel selection information acquired from the TS processing unit 107 in the channel selection information storage unit 106.

  Further, the channel selection information collection unit 113 stores the channel selection information in the channel selection information storage unit 106, stops the filtering processing of the TS processing unit 107, and updates the reception frequency held by the channel selection information collection unit 113. The updated reception frequency is stored in the channel selection information storage unit 106.

  When the receiver control unit 101 is in the external input state, the channel selection information collection unit 113 acquires channel selection information from the TS processing unit 107 and stores it in the channel selection information storage unit 106.

  When the receiver control unit 101 is in the normal viewing state, the receiver control unit 101 acquires channel selection information from the channel selection information storage unit 106, and simultaneously sets a plurality of filterings using the channel selection information in the TS processing unit 107. To do.

  As described above, the TS processing unit 107 can acquire channel selection information in an order that the tuner can receive without depending on the order of channel selection information. As a result, the TS processing unit 107 can shorten the tuning information acquisition waiting time, and thus can shorten the tuning time.

  FIG. 2 is a diagram showing an example of a device connection configuration of the digital broadcast receiver according to the present invention. The digital broadcast receiver 1 is connected to the display device 2, the digital broadcast receiver 3, the AV device 4, and the game machine 5 through, for example, an HDMI cable, a composite cable, a wireless LAN, and the like.

  The digital broadcast receiver 1 receives video / audio output signals from the digital broadcast receiver 3, the AV device 4, and the game machine 5, and outputs the received video / audio output signals to the display 2.

  FIG. 3 is a diagram illustrating the concept of shortening the channel selection time of the digital broadcast receiver according to the present invention. In the conventional channel selection technology, it is necessary to acquire PAT first. After channel selection is started (301), until PAT1 (310) is acquired, PMT1 (305), ECM1 (306), video PES1 ( 307), the audio PES (308) and the subtitle PES1 (309) cannot be acquired. Therefore, it takes time t2 until the channel selection information is acquired (303).

  In the channel selection technique of the present invention, since channel selection information can be acquired in advance, after channel selection is started (301), PMT1 (305), ECM1 (306), video PES (307), audio PES (308) Subtitle PES (309) can be acquired. Thereby, it becomes possible to shorten the acquisition waiting time of channel selection information to t1 (302).

  As described above, the time required for channel selection can be shortened by the time Δ as compared with the prior art (304).

  Next, the processing flow of the receiver control unit 101 will be described in detail with reference to FIG. FIG. 4 is a diagram illustrating a processing flow of the receiver control unit 101. The receiver control unit 101 initializes the state of the receiver control unit 101 to the normal viewing state (401). At this time, the service ID and reception frequency whose final viewing service flag is “1” are acquired from the setting information storage unit 103.

  It is determined whether the state of the receiver control unit 101 has changed from the normal viewing state to another state (402). When the normal viewing state is changed to another state, the service ID and the reception frequency held by the receiver control unit 101 are stored in the setting information storage unit 103 (403). If the normal viewing state has not changed to another state, it is determined whether the state has changed from another state to the normal viewing state (404).

  When the state changes from the other state to the normal viewing state, the service ID and reception frequency whose final viewing service flag is “1” are acquired from the setting information storage unit 103 (405). If the state has not changed from the other state to the normal viewing state, the state of the receiver control unit 101 is determined (406).

  As a result, when the receiver control unit 101 is in the normal viewing state, the normal viewing (407) process is performed. When the receiver control unit 101 is in the external input state, the channel selection information acquisition (409) is performed. When the receiver control unit 101 is in the power OFF state, the digital broadcast receiver 1 is stopped (412).

  Then, after performing the normal viewing (407) process or the tuning information acquisition (409) process, it is determined whether the normal viewing state has changed to another state (402).

  FIG. 5 is a diagram showing details of the table of the setting information storage unit 103. The table of the setting information storage unit 103 includes a service ID (501), a reception frequency (502), a TS-ID (503), and a final viewing service flag (504). The final viewing service flag (504) stores “1” for the last received service. “0” is stored in other services.

  Next, the flow of the normal viewing (407) process of the receiver control unit 101 will be described in detail with reference to FIGS.

  FIG. 6 is a diagram showing a flow of normal viewing processing. The receiver control unit 101 determines whether there is a channel selection request from the control signal input unit 102 (601). When there is a channel selection request, the receiver control unit 101 stops the video / audio output of the output control unit 111 (602). If there is no channel selection request, the PAT, PMT, ECM, video PES, audio PES, and subtitle PES are acquired from the TS processing unit 107 (610).

  The receiver control unit 101 stops the video / audio output of the output control unit 111 and then stops the filtering setting of the TS processing unit 107 (603). After stopping the filtering setting, the receiver control unit 101 sets the PAT and PMT acquisition flags to “0” (604).

  In addition, after completing the setting of the PAT and PMT acquisition flags, the receiver control unit 101 acquires the reception frequency corresponding to the service ID received together with the channel selection request from the setting information storage unit 103 (605).

  The receiver control unit 101 determines whether there is a change in the reception frequency acquired from the setting information storage unit 103 and the reception frequency held by the receiver control unit 101 (606). If the reception frequency is changed, the receiver control unit 101 sets the reception frequency corresponding to the service ID in the tuner control unit 104 (607). When there is no change in the reception frequency, the receiver control unit 101 reads the channel selection information from the channel selection information storage unit 106. Here, in the case of BS / CS digital broadcasting, the TS-ID is also read (608).

  After reading the channel selection information from the channel selection information storage unit 106, the receiver control unit 101 starts a plurality of filtering settings simultaneously in the TS processing unit 107 (609). The receiver control unit 101 obtains PAT, PMT, video PES PTS, audio PES PTS, and subtitle PES PTS from the TS processing unit 107 (610), and sets the output timing of the output control unit 111 (611). ).

  FIG. 7 is a diagram showing details of a digital terrestrial broadcast table in the channel selection information storage unit 106. The table of digital terrestrial broadcasting in the channel selection information storage unit 106 includes service ID (701), reception frequency (702), PAT version number (703), PAT CRC (704), PMT PID (705), and PMT Version number (706), PMT CRC (707), ECM PID (708), Video PES PID (709), Audio PES PID (710), Caption PES PID (711), Tuning information collection flag ( 712).

  The channel selection information stored in the table of the channel selection information storage unit 106 is received by the TS processing unit 107 from the tuner 105 while the receiver control unit 101 is in the external input state. When the TS processing unit 107 performs the filtering process, in the case of a service that does not include a subtitle PID, “0” is stored in the subtitle PID of the service. The channel selection information collection unit 113 acquires the channel selection information from the TS processing unit 107 based on the service information whose channel selection information collection flag (712) is “1”.

  FIG. 8 is a diagram showing details of a BS / CS digital broadcast table in the channel selection information storage unit 106. The BS / CS digital broadcast table of the channel selection information storage unit 106 includes service ID (801), reception frequency (802), TS-ID (803), PAT version number (804), PAT CRC (805), PMT PID (806), PMT version number (807), PMT CRC (808), ECM PID (809), video PES PID (810), audio PSE PID (811), subtitle PES PID ( 812), and a channel selection information collection flag (813).

  Since BS / CS digital broadcasting includes services of a plurality of broadcasting stations in one reception frequency, the service is specified using TS-ID in addition to the service ID and the reception frequency.

  The channel selection information stored in the table of the channel selection information storage unit 106 is received by the TS processing unit 107 from the tuner 105 while the receiver control unit 101 is in the external input state.

  When the TS processing unit 107 performs the filtering process, in the case of a service that does not include a subtitle PID, “0” is stored in the subtitle PID of the service.

  The channel selection information collection unit 113 acquires the channel selection information from the TS processing unit 107 based on the information of the service whose channel selection information collection flag (813) is “1”.

  FIG. 9 is a diagram illustrating a flow of channel selection information acquisition processing of the TS processing unit 107 in the normal viewing state. This corresponds to the process (608) of acquiring channel selection information from the TS processing unit 107 of FIG. When the TS processing unit 107 acquires any one of PAT, PMT, ECM, video PES, audio PES, and caption PES (901), the TS processing unit 107 determines the type of the acquired information (902).

  When the PAT is acquired, the TS processing unit 107 performs a PAT process (903). When the PMT is acquired, the TS processing unit 107 performs PMT processing (904). After performing the PAT process (903) and the PMT process (904), the TS processing unit 107 proceeds to a process of acquiring any one of the PAT, PMT, ECM, video PES, audio PES, and subtitle PES (901).

  When the ECM is acquired, the TS processing unit 107 performs ECM processing (905).

  When the video PES, audio PES, and subtitle PES are acquired, the TS processing unit 107 performs video PES / audio PES / subtitle PES processing (907). After performing the ECM process (905) and the video PES / audio PES / caption PES process (907), the TS processing unit 107 determines whether the PAT and PMT acquisition flags are set to “1” (906). ).

  When the PAT and PMT acquisition flags are set to “1”, the TS processing unit 107 ends the channel selection information acquisition process (608) of the receiver control unit 101. When the acquisition flag of PAT or PMT is not set to “1”, the TS processing unit 107 proceeds to processing for acquiring any of PAT, PMT, ECM, video PES, audio PES, and subtitle PES (901). ).

  FIG. 10 is a diagram showing a flow of processing for the PAT of the receiver control unit in the normal viewing state. This corresponds to the PAT process (903) in FIG. The receiver control unit 101 determines whether there is a change between the PAT version number acquired from the TS processing unit 107 and the PAT version number acquired from the channel selection information storage unit 106 (1001).

  When there is a change in the PAT version number, the receiver control unit 101 updates the PMT filtering setting of the TS processing unit 107 using the PAT acquired from the TS processing unit 107 (1003).

  If there is no change in the PAT version number, the receiver control unit 101 determines whether there is a change in the CRC of the PAT acquired from the TS processing unit 107 and the CRC of the PAT acquired from the channel selection information storage unit 106 ( 1002).

  When there is a change in the CRC of the PAT, the receiver control unit 101 updates the PMT filter setting of the TS processing unit 107 by using the PAT acquired from the TS processing unit 107 (1003). If there is no change in the CRC of the PAT, the receiver control unit 101 sets the PAT acquisition flag to “1” and ends the processing (1006).

  After the PMT filtering setting of the TS processing unit 107, the receiver control unit 101 updates the PAT held by the receiver control unit 101 using the PAT acquired from the TS processing unit 107 (1004), and stores channel selection information. The PAT stored in the unit 106 is updated using the PAT acquired from the TS processing unit 107 (1005), and the PAT acquisition flag is set to “1” (1006).

  FIG. 11 is a diagram illustrating a flow of processing for the PMT of the receiver control unit 101 during normal viewing. This corresponds to the PMT process (904) in FIG. The receiver control unit 101 determines whether there is a change between the version number of the PMT acquired from the TS processing unit 107 and the version number of the PMT acquired from the channel selection information storage unit 106 (1101).

  When there is a change in the PMT version number, the receiver control unit 101 updates the filtering settings of the ECM, video PES, audio PES, and caption PES of the TS processing unit 107 using the PMT acquired from the TS processing unit 107 ( 1103). When there is no change in the version number of the PMT, the receiver control unit 101 determines whether there is a change in the CRC of the PMT acquired from the TS processing unit 107 and the CRC of the PMT acquired from the channel selection information storage unit 106 (1102). ).

  When there is a change in the CRC of the PMT, the receiver control unit 101 updates the ECM, video PES, audio PES, and subtitle PES filtering settings of the TS processing unit 107 using the PMT acquired from the TS processing unit 107 ( 1103). If there is no change in the CRC of the PMT, the receiver control unit 101 sets the PMT acquisition flag to “1” and ends the processing (1106).

  The receiver control unit 101 sets filtering of ECM, video PES, audio PES, and caption PES in the TS processing unit 107, and then uses the PMT acquired from the TS processing unit 107 for the PMT held by the receiver control unit 101. Update (1104), update the PMT stored in the channel selection information storage unit 106 using the PMT acquired from the TS processing unit 107 (1105), and set the PMT acquisition flag to “1” (1106). ).

  FIG. 12 is a diagram illustrating a process flow for the ECM of the TS processing unit 107 during normal viewing. This corresponds to the ECM processing (905) of FIG. The TS processing unit 107 sets an ECM in the B-CAS card 108 (1201), and acquires a decryption key necessary for descrambling from the B-CAS card 108 (1202).

  FIG. 13 is a diagram illustrating a flow of processing for video PES, audio PES, and subtitle PES of the TS processing unit 107 during normal viewing. This corresponds to the video PES / audio PES / caption PES processing (907) of FIG.

  When the TS processing unit 107 acquires any one of the video PES, the audio PES, and the caption PES from the tuner 105, the TS processing unit 107 determines whether a decryption key necessary for descrambling has been acquired (1301). When the decryption key has been acquired, the TS processing unit 107 sets the video PES, audio PES, subtitle PES, and decryption key in the descrambler 109 (1302), and descrambles the video PES, audio PES, and subtitle PES.

  If the decryption key has not been acquired, the TS processing unit 107 generates a video ES, an audio ES, and a caption ES from the video PES, the audio PES, and the caption PES (1304).

  The TS processing unit 107 scrambles the video PES, audio PES, and subtitle PES, and then sets each PTS in the receiver control unit 101 (1303). From the video PES, audio PES, and subtitle PES, the video ES and audio ES and caption ES are generated (1304), and video ES, audio ES, caption ES, and each DTS are set in the decode control unit 110 (1305).

  FIG. 14 is a diagram showing a flow of processing of the decoding control unit 110 during normal viewing. The decode control unit 110 determines whether the acquired video ES, audio ES, and subtitle ES have been descrambled (1401). When the video ES, audio ES, and subtitle ES have been descrambled, the decode control unit 110 decodes the video ES, audio ES, and subtitle ES based on each DTS (1402), and outputs the decoding result to the output control unit 111. (1403). If the video ES, audio ES, and subtitle ES are not descrambled, the process ends.

  FIG. 15 is a diagram illustrating a flow of processing of the channel selection information collection unit 113. This corresponds to the process of channel selection information acquisition (408) in FIG. The channel selection information collection unit 113 reads the reception frequency whose channel selection information collection flag is “1” from the table managed by the channel selection information storage unit 106 (1501), and sets the reception frequency in the tuner control unit 104. (1502).

  Next, the channel selection information collection unit 113 performs PAT filtering setting in the TS processing unit 107 (1503). The channel selection information collection unit 113 acquires the PAT from the TS processing unit 107 and holds it in the channel selection information collection unit 113 (1504). After acquiring the PAT from the TS processing unit 107, the channel selection information collection unit 113 performs PMT filtering setting in the TS processing unit 107 (1505). The channel selection information collection unit 113 acquires the PMT from the TS processing unit 107 (1506). The channel selection information collection unit 113 stores the channel selection information acquired from the PAT and the PMT in the channel selection information storage unit 106 (1507).

  Next, the channel selection information collection unit 113 stops the PAT and PMT filtering of the TS processing unit 107 (1508), updates the reception frequency held by the channel selection information collection unit 113 (1509), and stores the channel selection information. The updated reception frequency is stored in the unit 106, and “1” is set in the channel selection information collection flag corresponding to the updated reception frequency in the channel selection information storage unit 106 (1510).

  According to the embodiment described above, the channel selection information collection unit 113 acquires channel selection information from the TS processing unit 107 and the channel selection information storage unit 106 while the receiver control unit 101 uses an external input. It becomes possible to store in.

  Further, when the receiver control unit 101 switches from external input to viewing, the receiver control unit 101 uses the channel selection information acquired from the channel selection information storage unit 106 to perform a plurality of filtering operations on the TS processing unit 107. Are set at the same time, and the TS processing unit 107 can acquire channel selection information in an order that the tuner can receive without depending on the order of channel selection information.

  Thereby, when viewing a digital broadcast, the digital broadcast receiver can shorten the channel information acquisition waiting time and the channel selection time.

1 is a block diagram of a digital broadcast receiver according to a first embodiment of the present invention. It is an apparatus connection block diagram of the digital broadcast receiver of this invention. It is a conceptual diagram of channel selection information collection time shortening of the digital broadcast receiver of this invention. It is a flowchart figure of the receiver control part of the digital broadcast receiver of this invention. It is explanatory drawing of an example of the table of the setting information storage part of the digital broadcast receiver of this invention. It is a flowchart figure of the normal viewing-and-listening state of the receiver control part of the digital broadcast receiver of this invention. It is explanatory drawing of an example of the table in the case of the terrestrial digital broadcasting of the channel selection information storage part of the digital broadcast receiver of this invention. It is explanatory drawing of an example of the table in the case of BS / CS digital broadcasting of the channel selection information storage part of the digital broadcasting receiver of this invention. It is a flowchart figure of channel selection information acquisition of the TS process part of the normal viewing state of the digital broadcast receiver of this invention. It is a flowchart figure of PAT acquisition of the receiver control part of the normal viewing state of the digital broadcast receiver of this invention. It is a flowchart figure of PMT acquisition of the receiver control part of the normal viewing state of the digital broadcast receiver of this invention. It is a flowchart figure of ECM acquisition of the TS process part of the normal viewing state of the digital broadcast receiver of this invention. It is a flowchart figure of video PES / audio PES / caption PES acquisition of the TS processing part of the normal viewing state of the digital broadcast receiver of the present invention. It is a flowchart figure of the decoding process part of the normal viewing condition of the digital broadcast receiver of this invention. It is a flowchart figure of the channel selection information collection part of the external input state of the digital broadcast receiver of this invention.

Explanation of symbols

  1: Digital broadcast receiver 101: Receiver control unit 103: Setting information storage unit 104: Tuner control unit 106: Tuning information storage unit 107: TS processing unit 110: Decode control unit 111: Output Control unit 112: Display switching control unit 113: Channel selection information collection unit

Claims (3)

A tuner that receives digital broadcast waves;
A TS processing unit that controls a stream of broadcast waves received by the tuner;
A channel information storage unit that records channel selection information of the stream;
A receiver control unit that controls the tuner, the TS processing unit, and the setting information storage unit;
The receiver control unit, when not using the tuner, controls the tuner and the TS processing unit to acquire channel tuning information, and records the channel tuning information in the channel tuning information storage unit,
A digital broadcast receiver that controls the tuner and the TS processing unit with reference to channel selection information in the channel selection information storage unit when the tuner is used. A digital broadcast receiver comprising a receiver control unit, a control signal input, a tuner control unit, a TS processing unit, a setting information storage unit, a tuning information collection unit, and a tuning information storage unit,
The receiver control unit, when receiving a request for switching from the control signal input unit to the external input, notifies the tuning information collection unit,
The channel selection information collection unit obtains a reception frequency from the setting information storage unit and sets it in the tuner control unit while the receiver control unit is using an external input, and Start setting PAT,
When receiving the PAT, the TS processing unit sets the PAT in the channel selection information collection unit, and then the channel selection information collection unit sets the PMT in the TS processing unit, and the TS processing unit If the PMT is acquired, the PMT is set in the tuning information collection unit,
The channel selection information storage unit, when the channel selection information collection unit acquires the PAT and PMT, PAT version number, PAT CRC, PMT PID, PMT version number, PMT CRC, ECM PID, video A digital broadcast receiver having a function of storing channel selection information including a PES PID, an audio PES ID, and a subtitle PES PID. The digital broadcast receiver according to claim 2,
When the receiver control unit switches from external input to viewing, using the tuning information acquired from the tuning information storage unit, simultaneously set a plurality of filtering in the TS processing unit,
The TS processing unit has a function of acquiring channel selection information in the order in which channel selection information can be acquired by filtering.

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