JP2005102004A - Receiving device and method, recording medium and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To acquire download data multiplexed to digital broadcasting more efficiently than heretofore. <P>SOLUTION: In a step S11, a control part 11 extracts a download identifier and module management information consisting of the total number of modules, module IDs and module size from download notification information stored in a RAM 14 at a time ahead of, just by a prescribed period of time, a time when a DII session and modules which a schedule of the download notification information shows and a user wants to receive are broadcasted (e.g. before several minutes). In a step S12, the control part 12 starts to acquire the DII session and the modules to be broadcasted according to a DSM-CC data carousel method. This invention is applicable to a receiver that receives digital broadcasting. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a receiving apparatus and method, a recording medium, and a program, and more particularly, to a receiving apparatus and method, and a recording medium that efficiently receive download data multiplexed on a broadcast signal such as digital television broadcast. , As well as programs.

  In digital broadcasting such as BS digital broadcasting, wide-area CS digital broadcasting, and terrestrial digital broadcasting, in addition to video data and audio data of a program, for example, a control program for operating a receiving device, a program table on a display, etc. A data signal (hereinafter referred to as download data) including common data including a broadcaster's logo mark, genre code, and the like used for display is multiplexed with the broadcast signal.

  The download data is broadcast (supplied) according to the DSM-CC data carousel method which is a kind of data transfer protocol. Here, an outline of the DSM-CC data carousel method will be described with reference to FIG. In the DSM-CC data carousel method, the download data is divided into multiple modules, and it takes several cycles per day, several tens of minutes per cycle, starting with the DII section containing information on each module. Sent repeatedly.

  FIG. 2 shows the data structure of the DII section. The DII section header is information indicating that the data is a DII session. The download identifier is information for identifying download data to be restored by combining the modules transmitted following the DII session. The total number of modules is information indicating the number of modules (n in the case of FIG. 1) transmitted following the DII session. The module ID is information for identifying a module transmitted subsequent to the DII session. The module size is information indicating the data size of the module transmitted following the DII session. The module version is information indicating the version of the module transmitted following the DII session. Note that there are as many module IDs, module sizes, and module versions as the total number of modules.

  The date and time when a plurality of modules are broadcast starting from the DII section is recorded in the download notification information (SDTT) broadcast several days before the DII section and the like.

  FIG. 3 shows the data structure of the download notification information. The SDTT header is information for indicating that the data is SDTT. The maker ID is information for specifying a maker such as a digital broadcast receiving apparatus from which download data is to be acquired. The model ID is information for specifying the model of a digital broadcast receiving device or the like from which download data is to be acquired. The schedule is information indicating the date and time and frequency at which a plurality of modules are broadcast starting from the DII section.

  The download identifier is information for identifying download data corresponding to the download notification information. The total number of modules is information indicating the total number of modules into which the download data corresponding to the download notification information is divided. The module ID is information for identifying the module. The module size is information indicating the data size of the module. Note that there are as many module IDs and module sizes as the total number of modules.

  FIG. 4 is a flowchart for explaining conventional processing for acquiring download data broadcast according to the DSM-CC data carousel method. This process is started at a timing based on a schedule recorded in download notification information acquired in advance. In step S1, a DII session is acquired from the broadcast signal, and in step S2, the DII session is analyzed. As a result, the identification information, data size, version, and the like of each module broadcast following the DII session can be determined.

  After the process of step 2 is completed, the broadcasted module is acquired in step S3. However, this module is not necessarily the module immediately after the DII session (module # 1 in the example of FIG. 1).

  In step S4, it is determined whether or not the module acquired in step S3 is a correct module corresponding to the DII session analyzed in step S2. If it is determined that the module is not correct, the process proceeds to step S5, and the module acquired in step S3 is discarded.

  If it is determined in step S4 that the module received in step S3 is a correct module corresponding to the DII session analyzed in step S2, the process proceeds to step S6, and all the modules corresponding to the DII session analyzed in step S2 are processed. Determine whether the module has been acquired. If it is determined that all modules corresponding to the DII session analyzed in step S2 have not yet been acquired, the process returns to step S3 and the subsequent processing is repeated. If it is determined in step S6 that all modules corresponding to the DII session analyzed in step S2 have been acquired, the download data is restored by combining all the acquired modules and decompressing. Above, description of the conventional download data acquisition process is complete | finished.

  By the way, in the conventional download data acquisition process, as described above, the module immediately after the DII session (module # 1 in the example of FIG. 1) is acquired in the first step S3 after the process of step S2. It is not always possible. This is because the module immediately after the DII session may be broadcast during the process of step S2. In such a case, since it is necessary to wait until the module immediately after the DII session is broadcast, there is a problem that the time required for completing the download data acquisition process becomes long.

  Conventionally, in order to solve such a problem, there is an invention in which a module # 1 is broadcast after a DII session is broadcast on the broadcast side after a predetermined interval (see, for example, Patent Document 1). ).

JP 2002-358228 A

  In the future, there will be more opportunities to download the receiver control program in order to cope with bug fixes caused by the complexity of the receiver control program structure and changes to the broadcast standard accompanying the launch of digital terrestrial broadcasting. That is expected.

  In addition, the data size of download data tends to increase as the number of functions of the receiving device increases. Due to these factors, it is expected that the transmission bandwidth for download, which is a shared resource, will be imminent.

  However, taking measures as described above on the broadcasting side is expensive and undesirable from the viewpoint of radio wave use efficiency, and therefore, the appearance of a method for solving the above problems on the receiving side is desired. Yes.

  The present invention has been made in view of such a situation, and an object of the present invention is to make it possible to acquire download data multiplexed in a digital broadcast wave more efficiently than before.

  The receiving apparatus according to the present invention includes a plurality of modules and module management information including information for identifying the plurality of modules, and receives carousel data periodically transmitted a plurality of times at a predetermined date and time. Including means, schedule information indicating the transmission date and time of carousel data, and module management information, acquisition means for acquiring notification information transmitted prior to transmission of carousel data, and included in the notification information acquired by the acquisition means Control means for controlling the receiving means to start reception of carousel data ahead of the transmission date and time indicated by the scheduled information.

  The receiving apparatus of the present invention may further include a confirmation unit that confirms a match between the module management information included in the notification information acquired by the acquisition unit and the module management information received by the reception unit.

  The receiving device of the present invention is received by the receiving unit when the checking unit confirms that the module management information included in the notification information acquired by the acquiring unit matches the module management information received by the receiving unit. A plurality of modules are stored and received by the receiving means when the confirmation means does not confirm that the module management information included in the notification information acquired by the acquiring means matches the module management information received by the receiving means. Further, a storage unit for discarding the plurality of modules can be further included.

  The reception method of the present invention comprises a plurality of modules and module management information including information for identifying the plurality of modules, and reception for receiving carousel data periodically transmitted a plurality of times at a predetermined date and time. Step, acquisition information including schedule information indicating transmission date and time of carousel data, and module management information, and acquiring notification information transmitted prior to transmission of carousel data, and notification information acquired in the processing of the acquisition step And a control step of starting reception of carousel data by controlling the processing of the reception step ahead of the transmission date and time indicated by the schedule information included in.

  The recording medium program of the present invention comprises a plurality of modules and module management information including information for identifying the plurality of modules, and receives carousel data periodically transmitted a plurality of times at a predetermined date and time. Acquired in the processing of the acquisition step, the acquisition step of acquiring the notification information transmitted prior to the transmission of the carousel data, including schedule information indicating the transmission date of the carousel data, and module management information And a control step of starting reception of carousel data by controlling the processing of the reception step preceding the transmission date and time indicated by the schedule information included in the notification information by a predetermined time.

  The program of the present invention comprises a plurality of modules and module management information including information for identifying the plurality of modules, and receives a carousel data periodically transmitted a plurality of times at a predetermined date and time. Including the schedule information indicating the transmission date and time of the carousel data, and the module management information, the acquisition step for acquiring the notification information transmitted prior to the transmission of the carousel data, and the notification information acquired in the processing of the acquisition step It is characterized by causing a computer to execute a process including a control step of starting reception of carousel data by controlling the process of a reception step by a predetermined time before the transmission date and time indicated by the included schedule information.

  In the receiving apparatus and method, and the program of the present invention, the schedule information indicating the transmission date and time of the carousel data, and the module management information are included, the notification information transmitted prior to the transmission of the carousel data is acquired, and the notification information is obtained. Reception of carousel data is started ahead of the transmission date and time indicated by the included schedule information by a predetermined time.

  According to the present invention, download data multiplexed in digital broadcasting can be acquired more efficiently than before.

  Embodiments of the present invention will be described below. Correspondences between constituent elements described in the claims and specific examples in the embodiments of the present invention are exemplified as follows. This description is to confirm that specific examples supporting the invention described in the claims are described in the embodiments of the invention. Therefore, even if there are specific examples that are described in the embodiment of the invention but are not described here as corresponding to the configuration requirements, the specific examples are not included in the configuration. It does not mean that it does not correspond to a requirement. On the contrary, even if a specific example is described here as corresponding to a configuration requirement, this means that the specific example does not correspond to a configuration requirement other than the configuration requirement. not.

  Further, this description does not mean that all the inventions corresponding to the specific examples described in the embodiments of the invention are described in the claims. In other words, this description is an invention corresponding to the specific example described in the embodiment of the invention, and the existence of an invention not described in the claims of this application, that is, in the future, a divisional application will be made. It does not deny the existence of an invention that is added by correction.

[Claim 1]
In a receiving device (for example, the digital broadcast receiving device 10 in FIG. 5) that receives data multiplexed in a digital broadcast signal (for example, a control program for the receiving device) in a state of being divided into a plurality of modules,
The module management information (for example, the DII section shown in FIG. 1) including the plurality of modules (for example, modules # 1 to #n in FIG. 1) and information for identifying the plurality of modules. Receiving means (for example, the demultiplexer 19 in FIG. 5 that performs the processes of steps S13 and S16 in FIG. 6) for receiving carousel data that is periodically transmitted multiple times during the day;
An acquisition means (for example, SDTT shown in FIG. 3) that includes schedule information indicating the transmission date and time of the carousel data, and the module management information and that is transmitted prior to the transmission of the carousel data (for example, SDTT shown in FIG. 3). , A control unit 11) that performs the process of step S11 of FIG.
Control means for controlling the receiving means to start reception of the carousel data ahead of the transmission date and time indicated by the schedule information included in the notification information obtained by the obtaining means (for example, reception of the carousel data) And a control unit 11) that performs the process of step S12 of FIG.
[Claim 2]
Confirmation means for confirming a match between the module management information included in the notification information acquired by the acquisition means and the module management information received by the reception means (for example, the process of step S15 in FIG. 6 is performed) The receiving apparatus according to claim 1, further comprising a control unit 11).
[Claim 3]
If the confirmation means confirms that the module management information included in the notification information acquired by the acquisition means matches the module management information received by the reception means, the confirmation means receives the module management information. The plurality of modules are stored, and the checking unit does not check whether the module management information included in the notification information acquired by the acquiring unit matches the module management information received by the receiving unit. 3. The storage device according to claim 2, further comprising a storage unit (for example, the control unit 11 that performs the processes of steps S <b> 19 and S <b> 21 in FIG. 6) that discards the plurality of modules received by the receiving unit. Receiver device.
[Claim 4]
In a receiving method for receiving data multiplexed in a digital broadcast signal in a state where it is divided into a plurality of modules,
A receiving step of receiving carousel data, which is composed of the plurality of modules and module management information including information for identifying the plurality of modules and periodically transmitted a plurality of times at a predetermined date and time (for example, FIG. 6 steps S13, S16),
An acquisition step (for example, the processing of step S11 in FIG. 6 is performed) that includes the schedule information indicating the transmission date and time of the carousel data and the module management information, and acquires notification information transmitted prior to the transmission of the carousel data. Control unit 11),
Control that starts reception of the carousel data by controlling the processing of the reception step by a predetermined time before the transmission date and time indicated by the schedule information included in the notification information acquired in the processing of the acquisition step And a step (for example, the control unit 11 that performs the process of step S12 in FIG. 6).

  Note that the correspondence relationship between the program recorded in the recording medium of the present invention, the constituent elements described in the claims of the program of the present invention, and the specific example in the embodiment of the present invention is the above-described receiving method of the present invention. The description is omitted because it is similar to the above.

  Hereinafter, a digital broadcast receiving apparatus to which the present invention is applied will be described. FIG. 5 shows a configuration example of a digital broadcast receiving apparatus to which the present invention is applied. The control unit 11 is connected to an operation input unit 12 that receives a user operation and generates a corresponding operation command, a ROM 13 that stores a control program, and a RAM 14 that stores various data. In addition, the communication unit 16 through the audio signal processing unit 22 are connected to the control unit 11 via the bus 15.

  The control unit 11 controls each unit of the digital broadcast receiving apparatus 10 in response to an operation command input from the operation input unit 12 based on a control program stored in the ROM 13. The communication unit 16 communicates predetermined data with other digital broadcast receiving apparatuses 10 and other electronic devices connected via a network according to a communication protocol such as TCP / IP. The RAM 14 stores the received download notification information, DII section, module, and the like.

  The front end unit 17 extracts a broadcast signal corresponding to the user's channel selection from the output of the antenna and outputs it to the descrambler 18. The descrambler 18 appropriately cancels the scramble of the broadcast signal input from the front end unit 17 and outputs it to the demultiplexer 19. The demultiplexer 19 separates video data and audio data from the broadcast signal input from the descrambler 18 and outputs the video data and audio data to the MPEG decoder 20. Further, the demultiplexer 19 separates the download data corresponding to the download identifier specified from the control unit 11 from the broadcast signal input from the descrambler 18, and outputs it to the control unit 11 via the bus 15.

  The MPEG decoder 20 decodes the video data and audio data input from the demultiplexer 19 and outputs the resulting video signal and audio signal to the video signal processing unit 21 or the audio signal processing unit 22, respectively. The video signal processing unit 21 performs predetermined image processing on the video signal input from the MPEG decoder 20 and outputs it to the monitor 30. The audio signal processing unit 22 performs predetermined audio processing on the audio signal input from the MPEG decoder 20 and outputs the result.

  Next, it is a flowchart explaining the process which acquires the download data broadcast by the digital broadcast receiver 10 according to a DSM-CC data carousel system. This process is started on the assumption that download notification information broadcast several days ahead of the download data to be acquired is acquired and held in the RAM 14.

  In step S11, the control unit 11 is stored in the RAM 14 a predetermined time before (for example, several minutes before) the time when the DII section and module to be received indicated by the schedule of the download notification information are broadcast. Module management information including the download identifier and the total number of modules, the module ID, and the module size is extracted from the downloaded notification information. In step S12, the control unit 11 starts acquisition of a DII session and modules broadcast according to the DSM-CC data carousel method.

  In step S13, the control unit 11 stands by until a DII session is acquired. If acquired, the process proceeds to step S14. In step S14, the control unit 11 analyzes the acquired DII session. In step S15, the control unit 11 determines whether the module management information included in the DII session analyzed in step S14 matches the module management information in the download notification information extracted in step S11. To do. If the two match, the process proceeds to step S16.

  In addition, acquisition of the module is performed while the processes of steps S14 and S15 are performed. In step S16, the control unit 11 stands by until a module is acquired. If acquired, the process proceeds to step S17.

  In step S17, the control unit 11 determines whether or not the acquired module is a correct module corresponding to the DII session analyzed in step S13. However, at this time, if the process of step S14 is not completed, it is determined whether or not the module is a correct module corresponding to the module management information of the download notification information extracted in the process of step S11. If it is determined that the acquired module is not a correct module, the process proceeds to step S18. In step S18, the control unit 11 discards the acquired module. The process returns to step S16, and the subsequent processes are performed.

  If it is determined in step S17 that the acquired module is a correct module, the process proceeds to step S19. In step S <b> 19, the control unit 11 stores the acquired module in the RAM 14. In step S20, the control unit 11 determines whether or not all modules corresponding to the DII session analyzed in step S14 have been acquired. If it is determined that all modules corresponding to the DII session analyzed in step S14 have not yet been acquired, the process returns to step S16 and the subsequent processing is repeated. If it is determined in step S20 that all the modules corresponding to the DII session analyzed in step S14 have been acquired, all the modules stored in the RAM 14 are combined and decompressed or the like to restore the download data as appropriate. To do.

  If it is determined in step S15 that the module management information included in the DII session analyzed in step S14 does not match the module management information in the download notification information extracted in step S11, the process is as follows. Proceed to step S21. In this case, since the DII session acquired in step S13 and the module following the DII session cannot restore the desired download data, in step S21, the control unit 11 stops acquiring the module. Thereafter, the process returns to step S12, and the subsequent processes are repeated. Above, description of the download data acquisition process by the digital broadcast receiving apparatus 10 is complete | finished.

  As described above, according to the digital broadcast receiving apparatus 10 to which the present invention is applied, since the module is acquired based on the module management information included in the download notification information, the module is supplied immediately after the DII session. Module can be prevented from being missed.

  Therefore, the success probability of obtaining download data is increased, and it is possible to contribute to effective use of frequencies. In the current digital broadcast receiving apparatus, since program viewing and downloading exclusively use digital resources, there are many cases where downloading is stopped by viewing, and the probability of successful download is low. Therefore, shortening the time required for obtaining download data according to the present invention is also beneficial for users who view the program.

  Note that the present invention can be applied to a television receiver and the like in addition to the present embodiment.

  Further, in this specification, the steps for describing a program include not only processes performed in time series according to the described order, but also processes executed in parallel or individually even if not necessarily processed in time series. Is included.

It is a figure for demonstrating the outline | summary of a DSM-CC data carousel system. It is a figure which shows the data structure of a DII section. It is a figure which shows the data structure of download notification information. It is a flowchart explaining the conventional download data acquisition process. It is a block diagram which shows the structural example of the digital broadcast receiver to which this invention is applied. It is a flowchart explaining the download data acquisition process by the digital broadcast receiver of FIG.

Explanation of symbols

  10 digital broadcast receiver, 11 control unit, 12 operation input unit, 13 ROM, 14 RAM, 19 demultiplexer

Claims (6)

In a receiving apparatus that receives data multiplexed in a digital broadcast signal in a state where it is divided into a plurality of modules,
Receiving means for receiving carousel data periodically consisting of a plurality of modules and module management information including information for identifying the plurality of modules and periodically transmitted at a predetermined date and time;
Acquisition means for acquiring notification information transmitted prior to transmission of the carousel data, including schedule information indicating the transmission date and time of the carousel data, and the module management information;
Control means for controlling the reception means to start reception of the carousel data ahead of a transmission time indicated by the schedule information included in the notification information acquired by the acquisition means by a predetermined time. A receiving apparatus. The apparatus according to claim 1, further comprising a confirmation unit that confirms a match between the module management information included in the notification information acquired by the acquisition unit and the module management information received by the reception unit. The receiving device described. When the confirmation means confirms that the module management information included in the notification information acquired by the acquisition means matches the module management information received by the reception means, the confirmation means receives the module management information. Storing the plurality of modules;
When the confirmation means does not confirm the match between the module management information included in the notification information acquired by the acquisition means and the module management information received by the reception means, it is received by the reception means. The receiving apparatus according to claim 2, further comprising storage means for discarding the plurality of modules. In a receiving method for receiving data multiplexed in a digital broadcast signal in a state where it is divided into a plurality of modules,
A reception step of receiving carousel data periodically composed of a plurality of times at a predetermined date and time, comprising module management information including information for identifying the plurality of modules and the plurality of modules;
An acquisition step including schedule information indicating the transmission date and time of the carousel data, and the module management information, and acquiring notification information transmitted prior to the transmission of the carousel data;
Control for starting reception of the carousel data by controlling the processing of the receiving step ahead of the transmission date and time indicated by the schedule information included in the notification information acquired in the processing of the acquiring step by a predetermined time And a reception method comprising: steps. A program for receiving data multiplexed in a digital broadcast signal in a state of being divided into a plurality of modules,
A reception step of receiving carousel data periodically composed of a plurality of times at a predetermined date and time, comprising module management information including information for identifying the plurality of modules and the plurality of modules;
An acquisition step including schedule information indicating the transmission date and time of the carousel data, and the module management information, and acquiring notification information transmitted prior to the transmission of the carousel data;
Control for starting reception of the carousel data by controlling the processing of the receiving step ahead of the transmission date and time indicated by the schedule information included in the notification information acquired in the processing of the acquiring step by a predetermined time A recording medium on which a computer-readable program is recorded. A program for receiving data multiplexed in a digital broadcast signal in a state of being divided into a plurality of modules,
A reception step of receiving carousel data periodically composed of a plurality of times at a predetermined date and time, comprising module management information including information for identifying the plurality of modules and the plurality of modules;
An acquisition step including schedule information indicating the transmission date and time of the carousel data, and the module management information, and acquiring notification information transmitted prior to the transmission of the carousel data;
Control for starting reception of the carousel data by controlling the processing of the receiving step ahead of the transmission date and time indicated by the schedule information included in the notification information acquired in the processing of the acquiring step by a predetermined time A program that causes a computer to execute processing including steps.

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