JP4182851B2 - Receiving apparatus and method, recording medium, and program - Google Patents

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 completing the processing of step S 2, in step S3, it acquires the modules that have been broadcast. 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 the modules corresponding to the DII session analyzed in step S2 have been acquired, the downloaded data is restored by combining and decompressing all the acquired modules. 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 again until the module immediately after the DII session is broadcast, there is a problem that the time required to complete 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-mentioned 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.

Receiving apparatus of the present invention, carousel sent multiple modules, and comprises a first module management information including information for identifying the multiple module, periodically a plurality of times in a predetermined time Including a receiving means for receiving data, an analyzing means for analyzing the received first module management information, schedule information indicating the transmission date and time of the carousel data, and second module management information, and preceding the transmission of the carousel data Acquisition means for acquiring the notification information to be transmitted, and second module management information from the acquired notification information preceding the transmission date and time indicated by the schedule information included in the acquired notification information by a predetermined time extraction means for extracting, by the analysis means, when the first module management information received has not been analyzed, the received module If it is a correct module corresponding to the second module management information extracted from the notification information, the received module is stored, and the received module is stored in the second module management information extracted from the notification information. if not a corresponding correct module discards the received module memory means and including.

In the receiving device of the present invention, when the first module management information received by the analyzing means has been analyzed in the storage means, the received module has been received and analyzed. if the correct module corresponding to stores the received module, the received module, if not the correct modules corresponding to the first module management information is received is already analyzed, is received the modules can you discard.

The receiving apparatus of the present invention further includes confirmation means for confirming whether or not the second module management information extracted from the notification information matches the first module management information that has been received and analyzed. Can do. In the receiving means, when it is confirmed by the checking means that the second module management information extracted from the notification information and the first module management information received and analyzed do not match, Reception can be canceled.

Receiving method of the present invention, the receiving means, multiple modules, and comprises a first module management information including information for identifying the multiple module, periodically a plurality of times in a predetermined time receives carousel data to be transmitted, the analysis means comprises analyzing the first module management information received, the acquisition means, the schedule information indicating the transmission time of the carousel data, and a second module management information, The notification information acquired prior to the transmission of the carousel data is acquired, and the extraction means acquires the notification information acquired by a predetermined time before the transmission date and time indicated by the schedule information included in the acquired notification information. The second module management information is extracted from the storage means, and the storage means is received when the received first module management information has not been analyzed by the analysis means. If the module is a correct module corresponding to the second module management information extracted from the notification information, the received module is stored, and the received module is extracted from the notification information. if not the correct module corresponding to the information, including discarding step the received module.

Recording medium program of the present invention, the computer comprises a first module management information including the multiple module, and the information for identifying the multiple module, periodically a plurality of times in a predetermined time A carousel including receiving means for receiving carousel data to be transmitted, analyzing means for analyzing the received first module management information, schedule information indicating the transmission date and time of carousel data, and second module management information obtaining means for obtaining notification information previously transmitted to the transmission of data, preceded by a predetermined time than the transmission time indicated by the scheduling information included in the acquired notification information, the from the obtained notifying information extraction means for extracting the second module management information, by the analysis means, the first module management information received it already analysis If the received module is a correct module corresponding to the second module management information extracted from the notification information, the received module is stored, and the received module is extracted from the notification information. If it is not a correct module corresponding to the second module management information, it is a program for causing the received module to function as storage means for discarding .

Program of the present invention, computer, multiple modules, and comprises a first module management information including information for identifying the multiple modules are periodically transmitted a plurality of times in a predetermined time Receiving carousel data, analyzing means for analyzing the received first module management information, schedule information indicating the transmission date and time of the carousel data, and second module management information, and transmitting carousel data Means for acquiring the notification information transmitted prior to the second module, and the second module from the acquired notification information by a predetermined time prior to the transmission date and time indicated by the schedule information included in the acquired notification information extracting means for extracting the management information, the analyzing means, when the first module management information received has not been analyzed, receiving If the received module is a correct module corresponding to the second module management information extracted from the notification information, the received module is stored, and the received module is extracted from the notification information. If it is not a correct module corresponding to the module management information, it is a program for causing the received module to function as storage means for discarding .

Receiving apparatus and method of the present invention, and the program, multiple modules, and comprises a first module management information including information for identifying the multiple modules, a plurality of times in a predetermined time period Transmitted first carousel data is received, the received first module management information is analyzed , and includes schedule information indicating the transmission date and time of the carousel data, and second module management information, and precedes the transmission of the carousel data. Notification information to be transmitted is acquired. Then, prior predetermined time than the transmission time indicated by the scheduling information included in the obtained notifying information, the second module management information from the acquired notification information is extracted, the first module management received If the information has not been analyzed, if the received module is the correct module corresponding to the second module management information extracted from the notification information, the received module is stored and the received module is If it is not a correct module corresponding to the second module management information extracted from the information, the received module is discarded.

  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, a future divisional application. It does not deny the existence of an invention that is added by correction.

[Claim 1]
In a receiving device 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,
Several said module (e.g., module # 1 to #n in FIG. 1), and the first module management information including information for identifying the modules multiple (e.g., DII section shown in FIG. 1) Receiving means (for example, the demultiplexer 19 in FIG. 5 that performs steps S13 and S16 in FIG. 6) for receiving carousel data periodically transmitted a plurality of times at a predetermined date and time;
Analysis means for analyzing the received first module management information (for example, the control unit 11 that performs the process of step S14 in FIG. 6);
Acquisition that acquires schedule information indicating the transmission date and time of the carousel data and the second module management information, and obtains notification information (for example, SDTT shown in FIG. 3) transmitted prior to the transmission of the carousel data Means (for example, the control unit 11 that performs the process of step S11 in FIG. 6);
Extraction means (for example, FIG. 6) that extracts the second module management information from the acquired notification information ahead of the transmission date and time indicated by the schedule information included in the acquired notification information by a predetermined time . A control unit 11) that performs the process of step S11 in FIG .
If the first module management information received by the analyzing means has not been analyzed, the received module is a correct module corresponding to the second module management information extracted from the notification information. For example, the received module is stored, and if the received module is not a correct module corresponding to the second module management information extracted from the notification information, the received module is discarded. storage means (e.g., control unit 11 performing the processing of step S18, S19 in FIG. 6) and the receiving device comprising.
[Claim 2 ]
The storage means corresponds to the first module management information that has been received and analyzed when the first module management information received by the analysis means has been analyzed. if the correct module for, storing received said module, if the received the module is not the correct modules corresponding to the first of the module management information is received is already analyzed, reception discard the module which is
The receiving apparatus according to 請 Motomeko 1.
[Claim 3]
Confirmation means for confirming whether or not the second module management information extracted from the notification information matches the first module management information that has been received and analyzed (for example, step S15 in FIG. 6). further comprising processing the control unit 11 for performing) of,
When the receiving means confirms that the second module management information extracted from the notification information does not match the first module management information received and analyzed by the confirmation means , Stop receiving the module
The receiving device according to claim 1 or 2.
[Claim 4]
In a receiving method of a receiving apparatus that receives data multiplexed in a digital broadcast signal in a state where it is divided into a plurality of modules,
The receiving device is:
Receiving means;
Analysis means;
Acquisition means;
Extraction means;
Storage means
Including
Carousel said receiving means, said module multiple, and comprises a first module management information including information for identifying the modules several are periodically transmitted a plurality of times in a predetermined time receiving data (e.g., step S13, S16 in FIG. 6),
The analysis unit analyzes the received first module management information (for example, step S14 in FIG. 6),
The acquisition means includes schedule information indicating a transmission date and time of the carousel data and second module management information, and acquires notification information transmitted prior to the transmission of the carousel data (for example, FIG. 6 Step S11)
The extraction means extracts second module management information from the acquired notification information, for a predetermined time before the transmission date and time indicated by the schedule information included in the acquired notification information (for example, , Step S11 in FIG.
When the first module management information received by the storage means is not analyzed by the analysis means, the received module corresponds to the second module management information extracted from the notification information. If it is a correct module, the received module is stored, and if the received module is not a correct module corresponding to the second module management information extracted from the notification information, it is received. Discard the module (for example, steps S18 and S19 in FIG. 6).
Reception method comprising the steps.

Note that the correspondence relationship between the program recorded in the recording medium of the present invention and 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 device of the present invention Since it is the same as that of the thing, the description is abbreviate | omitted.

  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 the acquired module, whether the correct module corresponding to DII session analyzed in step S1 4. However, if the process of step S14 is not completed at this point, 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 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 as necessary to restore the download data. 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 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,
Wherein the multiple modules, and comprises a first module management information including information for identifying the modules multiple reception that receives carousel data sent over by periodically a plurality of times in a predetermined time Means,
Analyzing means for analyzing the received first module management information;
Acquisition means for acquiring notification information transmitted prior to transmission of the carousel data, including schedule information indicating transmission date and time of the carousel data, and second module management information;
Extraction means for extracting the second module management information from the acquired notification information ahead of a transmission date and time indicated by the schedule information included in the acquired notification information by a predetermined time ;
If the first module management information received by the analyzing means has not been analyzed, the received module is a correct module corresponding to the second module management information extracted from the notification information. For example, the received module is stored, and if the received module is not a correct module corresponding to the second module management information extracted from the notification information, the received module is discarded. receiving device and a storage unit. The storage means corresponds to the first module management information that has been received and analyzed when the first module management information received by the analysis means has been analyzed. if the correct module for, storing received said module, if the received the module is not the correct modules corresponding to the first of the module management information is received is already analyzed, reception discard the module which is
The receiving apparatus according to 請 Motomeko 1.   And further comprising confirmation means for confirming whether or not the second module management information extracted from the notification information matches the first module management information that has been received and analyzed,
  When the receiving means confirms that the second module management information extracted from the notification information does not match the first module management information received and analyzed by the confirmation means , Stop receiving the module
  The receiving device according to claim 1 or 2. In a receiving method of a receiving apparatus that receives data multiplexed in a digital broadcast signal in a state where it is divided into a plurality of modules,
The receiving device is:
Receiving means;
Analysis means;
Acquisition means;
Extraction means;
Storage means
Including
Carousel said receiving means, said module multiple, and comprises a first module management information including information for identifying the modules several are periodically transmitted a plurality of times in a predetermined time receiving the data,
The analyzing means analyzes the received first module management information;
Said acquisition means, it said includes scheduling information indicating the transmission time of the carousel data, and a second of said module management information, obtains the announcement information transmitted prior to transmission of the carousel data,
The extraction means extracts the second module management information from the acquired notification information in advance by a predetermined time before the transmission date and time indicated by the schedule information included in the acquired notification information ,
When the first module management information received by the storage means is not analyzed by the analysis means, the received module corresponds to the second module management information extracted from the notification information. If it is a correct module, the received module is stored, and if the received module is not a correct module corresponding to the second module management information extracted from the notification information, it is received. Discard the module
Reception method comprising the steps. A computer of a receiving device that receives data multiplexed in a digital broadcast signal in a state where it is divided into a plurality of modules,
Wherein the multiple modules, and comprises a first module management information including information for identifying the modules multiple reception that receives carousel data sent over by periodically a plurality of times in a predetermined time Means,
Analyzing means for analyzing the received first module management information;
Acquisition means for acquiring notification information transmitted prior to transmission of the carousel data, including schedule information indicating transmission date and time of the carousel data, and second module management information;
Extraction means for extracting the second module management information from the acquired notification information ahead of a transmission date and time indicated by the schedule information included in the acquired notification information by a predetermined time ;
If the first module management information received by the analyzing means has not been analyzed, the received module is a correct module corresponding to the second module management information extracted from the notification information. For example, the received module is stored, and if the received module is not a correct module corresponding to the second module management information extracted from the notification information, the received module is discarded. Storage means
Recorded computer read-possible record medium, a program for causing a function in. A computer of a receiving device that receives data multiplexed in a digital broadcast signal in a state where it is divided into a plurality of modules,
Wherein the multiple modules, and comprises a first module management information including information for identifying the modules multiple reception that receives carousel data sent over by periodically a plurality of times in a predetermined time Means,
Analyzing means for analyzing the received first module management information;
Acquisition means for acquiring notification information transmitted prior to transmission of the carousel data, including schedule information indicating transmission date and time of the carousel data, and second module management information;
Extraction means for extracting the second module management information from the acquired notification information ahead of a transmission date and time indicated by the schedule information included in the acquired notification information by a predetermined time ;
If the first module management information received by the analyzing means has not been analyzed, the received module is a correct module corresponding to the second module management information extracted from the notification information. For example, the received module is stored, and if the received module is not a correct module corresponding to the second module management information extracted from the notification information, the received module is discarded. Storage means
Program to make it function .

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