JP2009049573A - Information processor, method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To acquire download data which is to be downloaded in an early stage. <P>SOLUTION: A module comparison part 114 compares a module ID of the module which is data for constituting download data that have been acquired when the download data were transmitted in the past, with a module ID contained in SDTT which is a notice information. An acquisition time setting part 131, if there is an unacquired module after the comparison, sets an acquisition start time for starting acquisition of the unacquired module and an acquisition finish time for finishing acquisition. An acquisition control part 132 acquires a module according to the acquisition start time and acquisition finish time. This invention can be applied to, for example, a digital broadcast receiver for receiving digital broadcasting. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an information processing apparatus and method, and a program, and in particular, an information processing apparatus and method that enable early acquisition of download data to be downloaded, for example, in a digital broadcast receiver or the like. , As well as programs.

  For example, in digital broadcasting such as terrestrial digital broadcasting, BS (Broadcasting Satellite) digital broadcasting, and broadband CS (Communication Satellite) digital broadcasting, a digital broadcasting receiver that receives broadcasting waves using radio waves transmitted from broadcasting stations. Data (including a program) for updating the software (program and data) is transmitted / received as download data to be downloaded by the digital broadcast receiver. That is, in the broadcasting station of digital broadcasting, notification information notifying that transmission of download data is performed in advance is transmitted to the digital broadcasting receiver, and at the time notified by the notification information in the digital broadcasting receiver. A transport stream of a specific frequency is received. As a result, the digital broadcast receiver acquires download data and updates the software of the digital broadcast receiver.

  The download data is created by the manufacturer that manufactures the digital broadcast receiver, and transmitted using the radio waves of the broadcast station. The number of download data transmissions per day, the transmission period, and the like are determined by the manufacturer requesting the broadcasting station. Here, the transmission period is a period in which the same download data is repeatedly transmitted. For example, in the current operation, the download data transmission period is one week.

  The download data is created by the manufacturer and transmitted without being processed at the broadcasting station. Therefore, in the broadcasting station, the order of modules that are constituent units constituting download data is basically not changed at the time of transmission. However, it is not guaranteed that the order of modules constituting download data created by the manufacturer will not be changed in the broadcasting station.

  Furthermore, because the frequency characteristics of the broadcast wave rarely change its bandwidth, the time required from the start of transmission of a certain amount of download data to the end of the transmission is the same broadcast. According to the wave, the transmission time is almost constant no matter how many times it is transmitted.

  A conventional digital broadcast receiver receives, for example, SDTT (Software Download Trigger Table) as notification information, and includes download data transmission (transmission) start time and download duration ( The download is scheduled based on the download data transmission time). Then, the digital broadcast receiver acquires download data by receiving a specific frequency band with the tuner according to the scheduling result.

  In order to supply download data more efficiently, the same type of functional block is extracted from multiple types of software data, and different types are used so that different identifiers are not assigned to the same type of functional block. By assigning an identifier to each functional block, and adding each identifier to each content of different types of functional blocks to generate download data, download data can be sent to a plurality of receivers that require the functional block. It has been proposed to distribute at once (see, for example, Patent Document 1).

JP 2005-142960 A

  By the way, in the digital broadcast receiver, since the user's operation is given priority, the frequency band received by the tuner is assigned to the transmission of the download data by the user's operation during downloading (during reception of download data by the tuner). There is a case where the download data is interrupted due to a change from a specific frequency band to another frequency band.

  For example, in a digital broadcast receiver having only one tuner, the download data is acquired by occupying the tuner. Therefore, during downloading, for example, the tuner may change the channel of the program that the user is viewing. When the frequency band to be received is changed to a frequency band other than the specific frequency band from which the download data is transmitted, the acquisition of the download data is interrupted.

  Also, even in a digital broadcast receiver having two tuners, acquisition of download data may be interrupted by a user performing a two-screen simultaneous viewing operation during download.

  During downloading, it is possible to prevent interruption of download data acquisition (interruption of download) by prohibiting the change of the frequency band received by the tuner. In this case, the user wants to watch the program that the user wants to view. Difficult to do.

  If acquisition of download data is interrupted as described above and the modules constituting the download data cannot be acquired, the digital broadcast receiver is all or part of the modules that could not be acquired. Regardless, scheduling is performed again so that all modules are acquired.

  Therefore, as the amount of download data increases and the download time required for downloading increases with the increase in the number of digital broadcast receivers in the future, in the worst case, due to user operations, radio interference, etc. The download data acquisition is repeatedly interrupted, which may delay the software update and cause a disadvantage to the user.

  The present invention has been made in view of such a situation, and enables download data to be acquired at an early stage.

  An information processing apparatus or program according to an aspect of the present invention is an information processing apparatus that acquires the download data according to notification information for notifying transmission of download data to be downloaded, the download data having been downloaded in the past And a comparison means for comparing the identification information of the configuration data constituting the download data and the identification information included in the notification information, which is acquired when If there is acquisition configuration data, setting means for setting an acquisition start time for starting acquisition of the unacquired configuration data and an acquisition end time for ending acquisition, and the configuration according to the acquisition start time and the acquisition end time As an information processing apparatus provided with an acquisition control means for acquiring data, or an information processing apparatus, a computer Is a program to function.

  The notification information includes a transmission start time at which transmission of the download data is started, a transmission band indicating a data amount transmitted per unit time, and a data amount of each of the configuration data constituting the download data to be transmitted. Further including a configuration data size to be set, and causing the setting means to set the acquisition start time and the acquisition end time of the non-acquired configuration data based on the transmission start time, transmission band, and configuration data size. it can.

  The information processing apparatus further includes holding means for holding time information regarding acquisition start time and acquisition end time of each of the configuration data when the download data has been transmitted in the past, and the setting means includes the holding The acquisition start time and the acquisition end time of the unacquired configuration data can be set based on the time information of the unacquired configuration data among the time information held by the means.

  The acquisition control means can acquire the unacquired configuration data for each of the unacquired configuration data based on the acquisition start time and the acquisition end time of each of the unacquired configuration data.

  The acquisition control means includes an acquisition start time of unacquired configuration data transmitted first in time among the unacquired configuration data and an untransmitted last time transmitted in the unacquired configuration data. The configuration data transmitted between the acquisition end time of the acquired configuration data can be acquired.

  An information processing method according to one aspect of the present invention is an information processing method for an information processing apparatus that acquires the download data according to notification information for notifying transmission of download data to be downloaded, the download data being downloaded in the past. The identification information of the configuration data constituting the download data acquired when the data is transmitted is compared with the identification information included in the notification information. As a result of the comparison, an unacquired configuration that is unacquired configuration data If there is data, setting an acquisition start time for starting acquisition of the unacquired configuration data and an acquisition end time for ending acquisition, and acquiring the configuration data according to the acquisition start time and the acquisition end time including.

  In one aspect of the present invention, the identification information of the configuration data constituting the download data acquired when the download data was transmitted in the past is compared with the identification information included in the notification information. If there is unacquired configuration data that is acquisition configuration data, the acquisition start time to start acquisition of unacquired configuration data and the acquisition end time to end acquisition are set, and the configuration is configured according to the acquisition start time and acquisition end time. Data is acquired.

  According to one aspect of the present invention, download data that is a download target can be acquired at an early stage.

  Embodiments of the present invention will be described below. Correspondences between the constituent elements of the present invention and the embodiments described in the specification or the drawings are exemplified as follows. This description is intended to confirm that the embodiments supporting the present invention are described in the specification or the drawings. Therefore, even if there is an embodiment which is described in the specification or the drawings but is not described here as an embodiment corresponding to the constituent elements of the present invention, that is not the case. It does not mean that the form does not correspond to the constituent requirements. Conversely, even if an embodiment is described here as corresponding to a configuration requirement, that means that the embodiment does not correspond to a configuration requirement other than the configuration requirement. It's not something to do.

  An information processing apparatus or program according to an aspect of the present invention is an information processing apparatus that acquires the download data according to notification information for notifying transmission of download data to be downloaded, the download data having been downloaded in the past A comparison means (for example, the module comparison unit 114 in FIG. 2) for comparing the identification information of the configuration data constituting the download data and the identification information included in the notification information acquired when As a result, when there is unacquired configuration data that is unacquired configuration data, setting means for setting an acquisition start time for starting acquisition of the unacquired configuration data and an acquisition end time for ending acquisition (for example, FIG. 4) The acquisition time setting unit 131) acquires the configuration data according to the acquisition start time and the acquisition end time. Acquisition control means (e.g., acquisition control unit 132 of FIG. 4) an information processing apparatus and a (e.g., the system controller 51 in FIG. 2) or as an information processing apparatus, a program causing a computer to function.

  The notification information (eg, SDTT) includes a transmission start time at which transmission of the download data is started, a transmission band indicating the amount of data transmitted per unit time, and the configuration data constituting the download data to be transmitted And further including a configuration data size indicating each data amount, and the setting means includes the acquisition start time and the acquisition end time of the unacquired configuration data based on the transmission start time, transmission band, and configuration data size. Can be set (for example, step S71 in FIG. 9).

  The information processing apparatus includes holding means (for example, an acquisition time DB 171 in FIG. 10) that holds time information related to the acquisition start time and the acquisition end time of each of the configuration data when the download data has been transmitted in the past. Further, the setting means sets the acquisition start time and the acquisition end time of the unacquired configuration data based on the time information of the unacquired configuration data among the time information held by the holding means. It can be set (for example, step S91 in FIG. 11).

  The acquisition control means can acquire the unacquired configuration data for each of the unacquired configuration data based on the acquisition start time and the acquisition end time of each of the unacquired configuration data (for example, FIG. 7 step S53).

  The acquisition control means includes an acquisition start time of unacquired configuration data transmitted first in time among the unacquired configuration data and an untransmitted last time transmitted in the unacquired configuration data. The configuration data transmitted between the acquisition end time of the acquired configuration data can be acquired (for example, step S113 in FIG. 12).

  An information processing method according to one aspect of the present invention is an information processing method for an information processing apparatus that acquires the download data according to notification information for notifying transmission of download data to be downloaded, the download data being downloaded in the past. The identification information of the configuration data constituting the download data acquired when the data is transmitted is compared with the identification information included in the notification information (for example, step S16 in FIG. 5). If there is unacquired configuration data that is acquisition configuration data, an acquisition start time for starting acquisition of the unacquired configuration data and an acquisition end time for ending acquisition are set (for example, step S51 in FIG. 7), and the acquisition is performed. A step of acquiring the configuration data according to a start time and the acquisition end time (for example, step S53 in FIG. 7). Including.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration example of an embodiment of a digital broadcast receiver to which the present invention is applied.

  1 includes an antenna 31, a monitor 32, a speaker 33, a system controller 51, a volatile memory 52, a nonvolatile memory 53, an operation input unit 54, a bus 55, a drive 56, a recording medium 57, and a front end unit 58. , A demultiplexer 59, an AV (Audio Visual) decoder 60, a video signal processing unit 61, and an audio signal processing unit 62.

  The receiver 11 in FIG. 1 receives a broadcast signal from a broadcast device (not shown) via an antenna 31, displays a video corresponding to the broadcast signal on the monitor 32, and outputs audio corresponding to the broadcast signal. Output from the speaker 33.

  The system controller 51 incorporates a processor (CPU (Central Processing Unit)) 71, a memory (not shown), and the like, and controls each unit of the receiver 11 when the processor 71 executes a program.

  In the example of FIG. 1, a volatile memory 52, a nonvolatile memory 53, and an operation input unit 54 are connected to the system controller 51. The system controller 51 is obtained via the operation input unit 54 as necessary by the processor 71 executing a program loaded in the volatile memory 52 or a program stored in the nonvolatile memory 53. Each part of the receiver 11 is controlled according to an operation signal indicating a user operation to be performed, and various processes are executed.

  The volatile memory 52 appropriately stores (holds) data necessary for the system controller 51 to execute processing.

  The nonvolatile memory 53 includes a program executed by the processor 71 and software of the receiver 11 including data such as a logo mark and a genre code of a broadcaster of a broadcasting station as data used in the program, Download data for updating the software of the receiver 11, a manufacturer ID (Identification) that is information indicating the manufacturer of the receiver 11, and a model ID that is information indicating the model and model number of the receiver 11 are currently held. The stored version number (downloaded data version number) and the like are stored (held).

  Here, hereinafter, the software of the receiver 11 will be described as including a program or data used in the program.

  For software update, in addition to overwriting the download data on the software of the receiver 11, the download data is, for example, an installation program, and the software of the receiver 11 is rewritten by executing the installation program. To do.

  The download data is composed of a minimum unit of download data called a module. A module corresponds to one function when, for example, a certain series of processing is realized by a plurality of functions.

  Further, when each part is called a content when a series of processes is divided into parts that are a group of processes, the content is composed of one or more modules.

  The unit of download data can be considered as a module, or it can be considered as content.

  The operation input unit 54 includes input buttons, dials, and the like, and supplies an operation signal corresponding to a user operation to the system controller 51.

  The drive 56, the front end unit 58, the demultiplexer 59, the AV decoder 60, the video signal processing unit 61, and the audio signal processing unit 62 are connected to the system controller 51 via the bus 55, and are controlled by the system controller 51. In response to this, a predetermined process is executed.

  A recording medium 57 composed of a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is appropriately attached to the drive 56. The drive 56 reads / writes data from / to the recording medium 57. Data read from the recording medium 57 by the drive 56 is supplied to and stored in the nonvolatile memory 53 via the bus 55, for example.

  The front end unit 58 extracts (receives) a broadcast signal in a frequency band corresponding to the user's channel selection from the broadcast signal supplied from the antenna 31, demodulates it, generates a transport stream, and demultiplexes 59. To supply.

  The demultiplexer 59 separates the transport stream from the front end unit 58 into a stream such as video data or audio data, or section data. The demultiplexer 59 supplies video data and audio data to the AV decoder 60 and supplies necessary section data to the system controller 51 via the bus 55.

  The system controller 51 temporarily develops each piece of section data from the demultiplexer 59 in the volatile memory 52. The section data includes a DSM-CC section (for example, download data) used for data broadcasting and data download, SDTT as notification information, EPG (Electronic Program Guide) data, and the like.

  The AV decoder 60 decodes the video data from the demultiplexer 59 and supplies it to the video signal processing unit 61. Further, the AV decoder 60 decodes the audio data from the demultiplexer 59 and supplies it to the audio signal processing unit 62.

  The video signal processing unit 61 adds (superimposes) data broadcast data or the like to the video data from the AV decoder 60, converts the data into a signal in the NTSC (National Television System Committee) format, and sends the corresponding video to the monitor 32. Display.

  The audio signal processing unit 62 supplies the audio data from the AV decoder 60 to the speaker 33 and outputs the corresponding audio.

  FIG. 2 shows a functional configuration example of the system controller 51 of FIG.

  In FIG. 2, the system controller 51 includes an SDTT acquisition unit 111, an ID determination unit 112, and a version comparison unit when a processor 71 included in the system controller 51 executes a predetermined control program stored in the nonvolatile memory 53. 113, a module comparison unit 114, a module acquisition unit 115, a storage control unit 116, and an update unit 117.

  Section data is supplied from the demultiplexer 59 to the SDTT acquisition unit 111. The SDTT acquisition unit 111 acquires SDTT as notification information described later with reference to FIG. 3 from the section data from the demultiplexer 59 and supplies it to the ID determination unit 112.

  In addition to the SDTT being supplied from the SDTT acquisition unit 111, the manufacturer ID and the model ID held in the nonvolatile memory 53 are supplied from the storage control unit 116 to the ID determination unit 112.

  The ID determination unit 112 uses the manufacturer ID and model ID (included in the SDTT) described in the SDTT from the SDTT acquisition unit 111 held in the nonvolatile memory 53 from the storage control unit 116. It is determined whether or not. When it is determined that the manufacturer ID and model ID described in the SDTT match the manufacturer ID and model ID held in the nonvolatile memory 53, the ID determination unit 112 should acquire the SDTT from the SDTT acquisition unit 111 The SDTT is supplied to the version comparison unit 113 as SDTT.

  The version comparison unit 113 is supplied with the SDTT from the ID determination unit 112 and the version number (version number of download data) held in the nonvolatile memory 53 from the storage control unit 116.

  The version comparison unit 113 is different from the version number described in the SDTT from the ID determination unit 112 (the version number of the download data notified to be transmitted by the SDTT) and the version number held in the nonvolatile memory 53. It is determined whether or not.

  When it is determined that the version number described in the SDTT is different from the version number stored in the nonvolatile memory 53, that is, the version number described in the SDTT from the version of the download data stored in the nonvolatile memory 53. When the version indicated by is newer, the version comparison unit 113 instructs the module acquisition unit 115 together with the SDTT to acquire all the modules that are the configuration data constituting the download data of the version indicated by the version number described in the SDTT. To supply.

  Further, the version comparison unit 113 updates the version number held in the nonvolatile memory 53 to a new version number described in the SDTT via the storage control unit 116.

  When it is determined that the version number described in the SDTT is the same as the version number of the download data stored in the nonvolatile memory 53, the version comparison unit 113 displays the version indicated by the version number described in the SDTT. An instruction for comparing the module constituting the download data with the module constituting the download data held in the nonvolatile memory 53 is supplied to the module comparison unit 114 together with the SDTT.

  In the following description, the configuration unit of download data is described as a module that is the minimum unit.

  Based on the instruction from the version comparison unit 113, the module comparison unit 114 acquires the module ID of the previously acquired module held in the volatile memory 52 via the storage control unit 116, The module ID, which is identification information for identifying the module constituting the download data, described in the SDTT from the version comparison unit 113 is compared with the module ID of the previously acquired module held in the volatile memory 52. .

  As a result of the comparison, when there is a module ID that exists in the module ID described in the SDTT and does not exist in the module ID held in the volatile memory 52, the module comparison unit 114 is identified by the module ID that does not exist. The module is specified as an unacquired module that has not yet been acquired, and an instruction to acquire the unacquired module is supplied to the module acquisition unit 115 together with the SDTT.

  The module acquisition unit 115 is supplied with section data from the demultiplexer 59. The module acquisition unit 115 acquires modules constituting download data from the section data from the demultiplexer 59 in accordance with an instruction from the version comparison unit 113 or the module comparison unit 114.

  That is, the module acquisition unit 115 acquires a module constituting download data of the version indicated by the version number described in the SDTT from the version comparison unit 113 based on an instruction from the version comparison unit 113. More specifically, the module acquisition unit 115, based on the SDTT from the version comparison unit 113, an acquisition start time that is a time at which acquisition of a module constituting download data required by the receiver 11 is started, and Scheduling to set an acquisition end time, which is the time to end acquisition, is performed, and all modules constituting the download data are acquired from the section data from the demultiplexer 59 based on the acquisition start time and acquisition end time.

  Further, the module acquisition unit 115 performs scheduling for setting an acquisition start time and an acquisition end time for acquiring an unacquired module based on the SDTT from the module comparison unit 114 based on an instruction from the module comparison unit 114. And an unacquired module is acquired from the section data from the demultiplexer 59 based on the acquisition start time and the acquisition end time.

  The module acquisition unit 115 supplies the module acquired from the demultiplexer 59 to the storage control unit 116.

  In addition, the module acquisition unit 115 supplies the module ID of the module acquired from the demultiplexer 59 to the storage control unit 116.

  Furthermore, when there is no unacquired module, the module acquisition unit 115 supplies information indicating that all modules to be acquired have been acquired to the update unit 117.

  The storage control unit 116 controls writing and reading of the volatile memory 52 and the nonvolatile memory 53.

  More specifically, the storage control unit 116 reads various data held in the volatile memory 52 and the nonvolatile memory 53 and supplies the data to the ID determination unit 112, the version comparison unit 113, or the module comparison unit 114. .

  In addition, the storage control unit 116 supplies the module supplied from the module acquisition unit 115 to the nonvolatile memory 53.

  Further, the storage control unit 116 supplies the module ID of the acquired module supplied from the module acquisition unit 115 to the volatile memory 52 to hold it.

  The update unit 117 uses the download data composed of the modules stored in the nonvolatile memory 53 in accordance with the information indicating that all the modules to be acquired from the module acquisition unit 115 have been acquired, and uses the nonvolatile memory 53 The software of the receiver 11 stored in the above is updated.

  FIG. 3 is a diagram showing the format of the SDTT included in the section data supplied from the demultiplexer 59 to the SDTT acquisition unit 111.

  In the example of FIG. 3, the SDTT starts from the beginning, the SDTT header, ..., manufacturer ID, model ID, ..., network identification, service identification, ..., content count, content ID, content size, ..., version number, ..., Including start time, duration, ..., component size, ..., transmission band, timeout value, ..., number of modules, module ID, module size, ....

  The SDTT header is information indicating that the data is SDTT.

  The manufacturer ID is information for identifying the manufacturer where the receiver 11 from which download data is to be acquired is manufactured. The model ID is information for identifying the model and model number of the receiver 11 from which download data is to be acquired.

  The network identification is a label for identifying a region of a broadcasting station (broadcasting device) that transmits a broadcast signal, a local business operator, or the like. The service identification is a label for identifying a service to which download data is transmitted during downloading.

  The number of contents is information indicating the number of contents of download data that is notified to be transmitted by the SDTT. The content ID is identification information for identifying each content. The content size is information for indicating the data amount of each content.

  The version number is information indicating the version of download data that is notified to be transmitted by the SDTT.

  The start time is information indicating the date and time (year / month / day, time) when the download data is transmitted. When transmission of download data is executed a plurality of times, the start time includes a period of one day after the date when the SDTT is transmitted.

  The duration is information indicating a time during which transmission of download data is continued. The duration is, for example, approximately twice as long as transmission of all modules of download data.

  The component size is information indicating the total amount of download data transmitted from the broadcast station.

  The transmission band is information indicating the amount of data transmitted per unit time (for example, 1 second) of download data that is notified to be transmitted by the SDTT.

  The timeout value is a timeout value recommended for receiving all of the download data, and is indicated in milliseconds.

  The number of modules is information indicating the number of modules constituting the download data notified to be transmitted by the SDTT. The module ID is identification information for identifying each module. The module size is information for indicating the data amount of each module.

  FIG. 4 is a block diagram illustrating a configuration example of the module acquisition unit 115 of FIG.

  The module acquisition unit 115 in FIG. 4 includes an acquisition time setting unit 131 and an acquisition control unit 132.

  The acquisition time setting unit 131 is supplied with a module acquisition instruction and SDTT from the version comparison unit 113 or the module comparison unit 114.

  When the module comparison instruction and SDTT are supplied from the version comparison unit 113 (FIG. 2), the acquisition time setting unit 131 notifies the transmission by the SDTT based on the start time and duration described in the SDTT. Scheduling is performed to set an acquisition start time and an acquisition end time for acquiring all the modules constituting the downloaded data.

  More specifically, the acquisition time setting unit 131 uses the start time described in the SDTT from the version comparison unit 113 as the acquisition start time, and the time elapsed by the duration from the start time described in the SDTT from the version comparison unit 113 Is set as the acquisition end time.

  Further, when the module acquisition instruction and the SDTT are supplied from the module comparison unit 114 (FIG. 2), the acquisition time setting unit 131 calculates the SDTT from the start time, the transmission band, and the module size described in the SDTT. Scheduling to set the acquisition start time and acquisition end time for each unacquired module by calculating the acquisition start time and acquisition end time for each unacquired module among the modules constituting the download data notified of transmission by I do.

  More specifically, the acquisition time setting unit 131 obtains the time obtained by the product of the module size and the transmission band of the module transmitted before the unacquired module from the start time described in the SDTT from the module comparison unit 114 ( Of the modules constituting the download data, the time elapsed by the time required for transmission of the modules transmitted before the unacquired modules is defined as the acquisition start time of the unacquired modules.

  In addition, the acquisition time setting unit 131 sets the time that has elapsed from the acquisition start time of the unacquired module by the time obtained by the product of the module size of the unacquired module and the transmission band (the time required for transmission of the unacquired module). The acquisition end time of an unacquired module.

  Similarly, even when there are a plurality of unacquired modules among the modules constituting the download data, the acquisition time setting unit 131 determines the acquisition start time for each unacquired module from the module size and transmission band described in the SDTT. The acquisition end time is calculated.

  When the acquisition start time and the acquisition end time are obtained by scheduling, the acquisition time setting unit 131 supplies the acquisition start time and the acquisition end time to the acquisition control unit 132.

  The acquisition control unit 132 controls module acquisition in the module acquisition unit 115 based on the acquisition start time and acquisition end time supplied from the acquisition time setting unit 131.

  More specifically, the acquisition control unit 132 controls the front end unit 58 at a time slightly before the acquisition start time, and download data that has been scheduled for acquisition (hereinafter referred to as target download data as appropriate). The reception of the broadcast signal of the frequency band transmitted is started. Thus, at the acquisition start time, the demultiplexer 59 separates the section data including the target download data from the transport stream and supplies it to the acquisition control unit 132 of the module acquisition unit 115. The acquisition control unit 132 acquires a module constituting the target download data from the section data supplied from the demultiplexer 59 from the acquisition start time to the acquisition end time, and stores the module in the nonvolatile memory 53 via the storage control unit 116. Remember.

  If the user performs an operation to change the channel (service) received by the receiver 11 between the acquisition start time and the acquisition end time, the user's operation is given priority in the receiver 11. Therefore, when the frequency band of the broadcast signal of the channel after the change is different from the frequency band in which the target download data is transmitted, the front end unit 58 receives the broadcast signal in the frequency band in which the target download data is transmitted. Therefore, the acquisition of the target download data is interrupted.

  In addition, after the acquisition of the target download data is interrupted and before the acquisition end time elapses, the frequency band of the broadcast signal becomes the same as the frequency band from which the target download data is transmitted, that is, the channel is returned. In such a case, the acquisition of the target download data is resumed from that point.

  Next, download processing by the system controller 51 of FIG. 2 executed based on the SDTT configured as shown in FIG. 3 will be described with reference to the flowchart of FIG.

  In step S11, the SDTT acquisition unit 111 acquires the SDTT from the section data from the demultiplexer 59, supplies the SDTT to the ID determination unit 112, and the process proceeds to step S12.

  In step S <b> 12, the ID determination unit 112 determines whether the manufacturer ID and model ID described in the SDTT from the SDTT acquisition unit 111 match the manufacturer ID and model ID stored in the nonvolatile memory 53. .

  If it is determined in step S12 that the manufacturer ID and model ID described in the SDTT from the SDTT acquisition unit 111 match the manufacturer ID and model ID stored in the nonvolatile memory 53, the ID determination unit 112 The SDTT from the acquisition unit 111 is used as the SDTT to be acquired, and the SDTT is supplied to the version comparison unit 113, and the process proceeds to step S13.

  On the other hand, if it is determined in step S12 that the manufacturer ID and model ID described in the SDTT from the SDTT acquisition unit 111 do not match the manufacturer ID and model ID held in the nonvolatile memory 53, the SDTT acquisition unit 111 Since the SDTT acquired by the receiver 11 is not the SDTT that the receiver 11 should acquire, that is, the SDTT that notifies the transmission of download data that the receiver 11 should acquire, the ID determination unit 112 discards the SDTT. . Thereafter, the process returns to step S11 and waits for acquisition of the next SDTT.

  In step S <b> 13, the version comparison unit 113 determines whether the version number described in the SDTT from the ID determination unit 112 is different from the version number held in the nonvolatile memory 53.

  If it is determined in step S13 that the version number described in the SDTT from the ID determination unit 112 is different from the version number held in the nonvolatile memory 53, that is, the download data held in the nonvolatile memory 53 When the version indicated by the version number described in the SDTT is newer than the version of the version, the version comparison unit 113 gives an instruction to acquire all the modules constituting the download data of the version indicated by the version number described in the SDTT. The data is supplied to the module acquisition unit 115 together with the SDTT, and the process proceeds to step S14.

  In step S14, the version comparison unit 113 updates the version number held in the nonvolatile memory 53 via the storage control unit 116 to a new version number, that is, the version number described in the SDTT, Proceed to S15.

  In step S15, the module acquisition unit 115 acquires all the modules constituting the download data of the version indicated by the version number described in the SDTT from the version comparison unit 113 based on the instruction from the version comparison unit 113. An acquisition process is performed, and then the process proceeds to step S18.

  On the other hand, if it is determined in step S13 that the version number described in the SDTT from the ID determination unit 112 is the same as the version number held in the nonvolatile memory 53, that is, the step S14 performed in the past. The version number held in the non-volatile memory 53 and the version number described in the SDTT match with each other and the download data notified of transmission by the SDTT is acquired for all modules in step S15. However, when the version comparison unit 113 has been performed at least once in the past, the version comparison unit 113 includes a module that configures the download data of the version indicated by the version number described in the SDTT, and a non-volatile memory of a version that matches the version Modules constituting the download data held in 53 Instructions for comparing the Le, with SDTT, supplied to the module comparing section 114, the process proceeds to step S16.

  In step S16, the module comparison unit 114, based on the instruction from the version comparison unit 113, the module ID described in the SDTT from the version comparison unit 113 and the previously acquired module stored in the volatile memory 52, That is, the module ID of the module acquired by the all module acquisition process of step S15 performed in the past or the unacquired module acquisition process of step S17 described later is compared.

  As a result of the comparison, when there is a module ID that exists in the module ID described in the SDTT and does not exist in the module ID of the module held in the volatile memory 52, the module comparison unit 114 identifies the module ID that does not exist. The module to be acquired is specified as an unacquired module, and an instruction to acquire the unacquired module is supplied to the module acquisition unit 115 together with the SDTT from the version comparison unit 113, and the process proceeds to step S17.

  In step S17, the module acquisition unit 115 performs an unacquired module acquisition process for acquiring an unacquired module based on an instruction from the module comparison unit 114, and then the process proceeds to step S18.

  In step S18, the module acquisition unit 115 obtains the module to be acquired by the all module acquisition process in step S15 or the unacquired module acquisition process in step S17, that is, the version represented by the version number held in the nonvolatile memory 53. It is determined whether or not all the modules constituting the download data (modules constituting the download data notified of transmission by SDTT) have been acquired.

  If the module acquisition unit 115 determines in step S18 that all modules to be acquired have been acquired, that is, all the modules constituting the version of download data represented by the version number held in the nonvolatile memory 53 are non-volatile. If it is held in the memory 53, information indicating that all the modules to be acquired have been acquired is supplied to the update unit 117, and the process proceeds to step S19.

  In step S <b> 19, the update unit 117 uses download data composed of modules held in the nonvolatile memory 53 in accordance with information indicating that all modules to be acquired from the module acquisition unit 115 have been acquired. The software of the receiver 11 held in the nonvolatile memory 53 is updated, and the process returns to step S11.

  On the other hand, if it is determined in step S18 that the module to be acquired has not yet been acquired, the module acquisition unit 115 performs the all-module acquisition process in step S15 performed immediately before or the unacquired module acquisition process in step S17. The module ID of the acquired module is supplied to the storage control unit 116, and the process proceeds to step S20.

  In step S20, the storage control unit 116 volatilizes the module ID of the module acquired from the module acquisition unit 115 acquired in the immediately preceding all module acquisition process in step S15 or the unacquired module acquisition process in step S17. In the memory 52. As a result, the volatile memory 52 has already acquired the non-volatile memory of the modules constituting the download data of the version represented by the version number (version number described in the SDTT) held in the non-volatile memory 53. The module ID of the module (acquired module) held in 53 is held.

  Thereafter, the process returns from step S20 to step S11 and waits for the acquisition of the next SDTT.

  Next, the module acquisition process of the module acquisition unit 115 in FIG. 2 will be described with reference to FIGS. 6 and 7.

  FIG. 6 is a flowchart illustrating a detailed example of the all module acquisition process in step S15 of the flowchart of FIG.

  In step S31, the acquisition time setting unit 131 of the module acquisition unit 115 performs the start time and continuation described in the SDTT from the version comparison unit 113 in accordance with the acquisition instruction supplied from the version comparison unit 113 in step S13 of FIG. Based on the time, the acquisition start time and the acquisition end time for acquiring all the modules constituting the download data notified of transmission by the SDTT are set, and the acquisition start time and the acquisition end time are set as the acquisition control unit 132. The process proceeds to step S32.

  In step S <b> 32, the acquisition control unit 132 determines whether or not the current time has reached the acquisition start time supplied from the acquisition time setting unit 131. If it is determined in step S32 that the acquisition start time has not been reached, this processing is repeated until the acquisition start time is reached.

  On the other hand, if it is determined in step S32 that the acquisition start time has come, the process proceeds to step S33, the acquisition control unit 132 starts acquiring the module, and the process proceeds to step S34.

  That is, the acquisition control unit 132 extracts the modules constituting the download data notified of transmission by SDTT from the section data from the demultiplexer 59 and supplies the modules to the nonvolatile memory 53 via the storage control unit 116. Remember.

  In step S <b> 34, the acquisition control unit 132 determines whether or not the current time has reached the acquisition end time supplied from the acquisition time setting unit 131. If it is determined in step S34 that the acquisition end time has not been reached, the transmission of all the modules constituting the download data notified of transmission by the SDTT from the broadcast station has not been completed yet. Returning to step S33, the module acquisition process of step S34 is repeated.

  On the other hand, if it is determined in step S34 that the acquisition end time has come, transmission of all modules has been completed, and the process returns.

  While the module acquisition process in step S33 is repeated, for example, as described above, the user performs an operation of changing the channel received by the receiver 11, and as a result, the front end unit 58 ( In FIG. 1), when it becomes impossible to receive a broadcast signal in a frequency band in which download data is transmitted, for example, the all-module acquisition process is interrupted.

  In this case, all or part of the download data becomes an unacquired module due to the interruption of the all module acquisition process. The unacquired module is acquired by performing the unacquired module acquisition process in step S17 of FIG.

  FIG. 7 is a flowchart for explaining a detailed example of the unacquired module acquisition process in step S17 of the flowchart of FIG.

  In step S51, the acquisition time setting unit 131 of the module acquisition unit 115 follows the acquisition instruction supplied from the module comparison unit 114 in step S16 of FIG. 5 and based on the information described in the SDTT from the module comparison unit 114. An acquisition start time and an acquisition end time for each unacquired module are set and supplied to the acquisition control unit 132.

  In step S <b> 52, the acquisition control unit 132 sets the current time to the acquisition start time of the unacquired module transmitted first in time among the acquisition start times for each of the unacquired modules supplied from the acquisition time setting unit 131. It is determined whether or not. If it is determined in step S52 that the acquisition start time transmitted first in time is not reached, this processing is repeated until the acquisition start time of the unacquired module transmitted first in time is reached.

  On the other hand, when it is determined in step S52 that the acquisition start time has come, the process proceeds to step S53, and the acquisition control unit 132 acquires the unacquired module transmitted first in time, and the process proceeds to step S54. Proceed to

  That is, the acquisition control unit 132 extracts an unacquired module from among the modules constituting the download data notified of transmission by SDTT from the section data from the demultiplexer 59, and stores the nonvolatile data via the storage control unit 116. It is supplied to the memory 53 and stored.

  In step S54, whether the acquisition control unit 132 has reached the acquisition end time of the unacquired module transmitted last in time based on the acquisition end time for each unacquired module supplied from the acquisition time setting unit 131. Determine whether or not. If it is determined that it is not the acquisition end time of the unacquired module that is transmitted last in time, the unacquired module among the modules that make up the download data from the broadcasting station that is notified of transmission by SDTT Is not completed, the process returns to step S52 to wait for the acquisition start time of the next unacquired module.

  On the other hand, if it is determined in step S54 that the acquisition end time of the unacquired module transmitted last in time is reached, the process returns because the transmission of the unacquired module to be acquired has been completed.

  While the module acquisition process in step S53 is repeated, for example, as described above, the user performs an operation of changing the channel received by the receiver 11, and as a result, the front end unit 58 ( In FIG. 1), when it becomes impossible to receive a broadcast signal in a frequency band to which download data is transmitted, for example, the unacquired module acquisition process is interrupted.

  In this case, all or a part of the downloaded data remains unacquired modules due to the interruption of the unacquired module acquisition process. The unacquired module is acquired by performing the unacquired module acquisition process again.

  With reference to FIG. 8, the unacquired module acquisition process for each unacquired module described in the flowchart of FIG. 7 will be further described.

  In the example of FIG. 8, download data required by the receiver 11 is composed of modules 1 to 8. In FIG. 8, acquired modules in the receiver 11 are represented by solid lines, and unacquired modules are represented by broken lines.

  Therefore, in the example of FIG. 8, the modules 3 and 6 are unacquired modules. In this case, according to the unacquired module acquisition process of FIG. 7, scheduling for setting the acquisition start time and the acquisition end time of each of the module 3 and the module 6 is performed.

  Thereafter, in the unacquired module acquisition process, an unacquired module is acquired according to the scheduling result.

  That is, of the unacquired modules, when the acquisition start time is earlier in time, the acquisition of the unacquired module is performed from the acquisition start time to the corresponding acquisition end time, and the last acquisition end in time When the time comes, the unacquired module acquisition process ends.

  Now, in FIG. 8, assuming that modules 1 to 8 are transmitted in that order, module 3 that is transmitted first in time among modules 1 to 8 in the unacquired module acquisition process. When the acquisition start time is reached, the module 3 is acquired.

  When the acquisition end time of the module 3 is reached, and the acquisition start time of the module 6 that is transmitted last in time is reached, the acquisition of the module 6 is started. The acquisition module acquisition process ends.

  In this way, the receiver 11 performs two schedulings, the scheduling for acquiring the module 3 and the scheduling for acquiring the module 6, which are indicated by the arrows at the bottom of the modules 1 to 8 in FIG. 8. The receiver 11 acquires an unacquired module by performing such scheduling.

  Next, the acquisition time setting process in step S51 of the flowchart of FIG. 7 will be described with reference to FIGS.

  FIG. 9 is a flowchart for explaining a detailed example of the acquisition time setting process in step S51 of the flowchart of FIG.

  In step S71, the acquisition time setting unit 131 calculates the acquisition start time and the acquisition end time for each unacquired module from the start time, transmission band, and module size described in the SDTT from the module comparison unit 114. The acquisition start time and acquisition end time are set, and the process returns.

  More specifically, the acquisition time setting unit 131 obtains the time obtained by the product of the module size and the transmission band of the module transmitted before the unacquired module from the start time described in the SDTT from the module comparison unit 114 ( The time elapsed by the time required to transmit a module transmitted before the unacquired module is set as the acquisition start time of the unacquired module.

  In addition, the acquisition time setting unit 131 sets the time that has elapsed from the acquisition start time of the unacquired module by the time obtained by the product of the module size of the unacquired module and the transmission band (the time required for transmission of the unacquired module). The acquisition end time of an unacquired module.

  For example, when the SDTT from the module comparison unit 114 is an SDTT for notifying transmission of download data composed of the modules 1 to 8 shown in FIG. 8, and the unacquired modules are the module 3 and the module 6. The acquisition time setting unit 131 obtains the time (module 1 and module 2) obtained from the product of the module size and the transmission band of the modules 1 and 2 in FIG. 8 from the start time described in the SDTT from the module comparison unit 114. The time that has elapsed for the time required for transmission) is taken as the acquisition start time of the module 3, which is an unacquired module.

  Further, for example, the acquisition time setting unit 131 sets the time that has elapsed from the acquisition start time of the module 3 by the time obtained by the product of the module size of the module 3 and the transmission band (the time required for transmission of the module 3). 3 acquisition end time.

  Similarly, the acquisition time setting unit 131 calculates the acquisition start time and the acquisition end time of the module 6 that is an unacquired module.

  FIG. 10 is a block diagram illustrating another configuration example of the module acquisition unit 115 of FIG.

  The module acquisition unit 115 in FIG. 10 includes an acquisition time setting unit 151 and an acquisition control unit 152. In FIG. 10, the nonvolatile memory 53 connected to the module acquisition unit 115 via the storage control unit 116 has a storage area as an acquisition time database 171 (hereinafter referred to as acquisition time DB 171). Yes.

  When the acquisition instruction is supplied from the version comparison unit 113 (FIG. 2), the acquisition time setting unit 151 is notified of the transmission by the SDTT from the version comparison unit 113 as in the acquisition time setting unit 131 of FIG. An acquisition start time and an acquisition end time for acquiring all modules constituting download data are set.

  More specifically, the acquisition time setting unit 151 uses the start time described in the SDTT from the version comparison unit 113 as the acquisition start time, and sets the time that has elapsed from the start time described in the SDTT as the acquisition end time. Set.

  Further, when an acquisition instruction is supplied from the module comparison unit 114 (FIG. 2), the acquisition time setting unit 151 receives download data (module) from the acquisition time DB 171 of the nonvolatile memory 53 in the past (first time). The acquisition start time for each unacquired module is read out by reading out the time information of the unacquired module among the time information related to the acquisition start time and acquisition end time of each module generated and stored (held) when transmitted. And set the acquisition end time. The acquisition time DB 171 and time information will be described later.

  The acquisition time setting unit 151 supplies the acquisition start time and the acquisition end time to the acquisition control unit 152.

  Similar to the acquisition control unit 132 in FIG. 4, the acquisition control unit 152 controls the module acquisition unit 115 to acquire a module based on the acquisition start time and the acquisition end time supplied from the acquisition time setting unit 151. More specifically, the acquisition control unit 152 acquires download data from the section data separated by the demultiplexer 59 from the acquisition start time to the acquisition end time, and the nonvolatile memory 53 via the storage control unit 116. To remember.

  The acquisition time DB 171 uses each module based on the start time described in the SDTT supplied from the version comparison unit 113 to the acquisition time setting unit 151 in the first download data acquisition process, that is, all module acquisition processes. The acquisition start time and the acquisition end time are stored (held) as time information.

  Here, the acquisition start time of each module with reference to the start time described in the SDTT in the time information will be referred to as start time information, and the acquisition end time of each module with reference to the start time described in the SDTT. Is called end time information.

  The time information of each module is acquired in step S33 of FIG. 6 by the acquisition control unit 152 using the start time described in the SDTT supplied from the version comparison unit 113 to the acquisition time setting unit 151 as a reference. It is obtained by measuring the start time and the acquisition end time based on a clock unit (not shown). The acquisition control unit 152 associates the time information of each module with the module ID of each module and supplies the module to the acquisition time DB 171.

  Here, when the all module acquisition process is interrupted, the acquisition control unit 152 acquires the module acquired before the all module acquisition process is interrupted and the module acquired after the all module acquisition process is interrupted and restarted. Even if the time information can be acquired, the time information about the module transmitted while the all module acquisition process is interrupted cannot be acquired.

  In the all module acquisition process, the time information of a module that has not been acquired (unacquired module) can be obtained from the end time information of the module acquired before and the start time information of the module acquired after that. In addition, when there are modules that have not been acquired continuously, the modules that have not been acquired continuously are regarded as one module, and the end time information of the module acquired before and after that are acquired. From the start time information of the module, the time information of the module that has not been acquired can be obtained.

  Then, the acquisition time setting unit 151 reads the time information associated with the module ID of the unacquired module from the acquisition time DB 171 and adds the time information of each unacquired module to the start time described in the SDTT, Set the acquisition start time and acquisition end time for each unacquired module.

  FIG. 11 is a flowchart illustrating a detailed example of the acquisition time setting process in step S51 when the module acquisition unit 115 in FIG. 10 performs the non-acquisition module acquisition process in FIG.

  In step S91, the acquisition time setting unit 151 sets the acquisition start time and the acquisition end time by reading the time information of the unacquired module from the acquisition time DB 171, and the process returns.

  More specifically, the acquisition time setting unit 151 reads the time information associated with the module ID of the non-acquisition module from the acquisition time DB 171 and sets the start time described in the SDTT as the start time. By adding the time information of each acquisition module, the acquisition start time and acquisition end time for each unacquired module are set.

  In this way, the receiver 11 does not need to calculate the acquisition start time and the acquisition end time in the second and subsequent download data acquisition processing (unacquired module acquisition processing), and the processing load of the system controller 51 Can be reduced.

  FIG. 12 is a flowchart for explaining another detailed example of the unacquired module acquisition process in step S17 of the flowchart of FIG.

  In step S111, the acquisition time setting unit 131 (or acquisition time setting unit 151) of the module acquisition unit 115 follows the acquisition instruction supplied from the module comparison unit 114 in step S16 of FIG. Based on the information described in the SDTT, an acquisition start time and an acquisition end time for each unacquired module are set and supplied to the acquisition control unit 132 (or the acquisition control unit 152).

  In step S112, the acquisition control unit 132 (or the acquisition control unit 152) determines that the current time is the acquisition start time for each unacquired module supplied from the acquisition time setting unit 131 (or the acquisition time setting unit 151). It is determined whether or not the acquisition start time of the unacquired module transmitted first in time has come. If it is determined in step S112 that the acquisition start time of the unacquired module transmitted first in time is not reached, this processing is repeated until the acquisition start time is reached.

  On the other hand, if it is determined in step S112 that the acquisition start time of the first unacquired module has been reached, the process proceeds to step S113, and the acquisition control unit 132 (or acquisition control unit 152) is transmitted first in time. Start acquiring unacquired modules.

  That is, the acquisition control unit 132 (or the acquisition control unit 152) extracts, from the section data from the demultiplexer 59, an unacquired module among the modules constituting the download data notified of transmission by the SDTT, and the storage control unit The data is supplied to and stored in the nonvolatile memory 53 via 116.

  In addition, between step S113 and step S114, the acquisition control unit 132 (or the acquisition control unit 152) starts acquiring the unacquired module transmitted first in time, and then continues to the unacquired module. Regardless of whether the transmitted module is an acquired module or an unacquired module, modules are acquired continuously.

  In step S <b> 114, the acquisition control unit 132 (or the acquisition control unit 152) determines the time based on the acquisition end time for each unacquired module supplied from the acquisition time setting unit 131 (or the acquisition time setting unit 151). It is determined whether or not the acquisition end time of the unacquired module transmitted last is reached.

  If it is determined in step S114 that the acquisition end time of the last unacquired module has not been reached, the transmission of the module constituting the download data notified of transmission by the SDTT from the broadcast station has not been completed. The process returns to step S113, and module acquisition is continued.

  On the other hand, if it is determined in step S114 that the acquisition end time of the unacquired module transmitted last in time is reached, the process returns because the transmission of the module to be acquired has been completed.

  While the module acquisition process in step S113 is being performed, for example, as described above, the user performs an operation of changing the channel received by the receiver 11, and as a result, the front end unit 58 ( In FIG. 1), when it becomes impossible to receive a broadcast signal in a frequency band to which download data is transmitted, for example, the unacquired module acquisition process is interrupted.

  In this case, all or a part of the downloaded data remains unacquired modules due to the interruption of the unacquired module acquisition process. The unacquired module is acquired by performing the unacquired module acquisition process again.

  With reference to FIG. 13, the non-acquired module acquisition process including the acquired module described in the flowchart of FIG. 12 will be further described.

  In the example of FIG. 13, the download data required by the receiver 11 is composed of modules 1 to 8 as in FIG. In FIG. 13, acquired modules in the receiver 11 are represented by solid lines, and unacquired modules are represented by broken lines.

  Therefore, in the example of FIG. 13, the module 3 and the module 6 are unacquired modules as in FIG. In this case, according to the unacquired module acquisition process of FIG. 12, scheduling for setting the acquisition start time and the acquisition end time of each of the module 3 and the module 6 is performed.

  Thereafter, in the unacquired module acquisition process, an unacquired module is acquired according to the scheduling result.

  In other words, when the acquisition start time that is the earliest among the unacquired modules is reached, the acquisition of unacquired modules is acquired from the acquisition start time to the last acquisition end time in time, including the acquired modules. When the last acquisition end time is reached, the non-acquisition module acquisition process ends.

  Now, in FIG. 13, if the modules 1 to 8 are transmitted in that order, the module 3 that is transmitted first in time among the modules 1 to 8 in the unacquired module acquisition process. When the acquisition start time is reached, the module 3 is acquired.

  Then, after the acquisition of the module 3 is started, the acquisition of the module is continuously performed until the acquisition end time of the module 6 transmitted last in time is reached, and the acquisition of the module 4, the module 5, and the module 6 is performed. When the acquisition end time of module 6 is reached, the unacquired module acquisition process ends.

  In this way, the receiver 11 performs one scheduling for acquiring the modules 3 to 6 indicated by the arrows at the bottom of the modules 1 to 8 in FIG. The receiver 11 acquires an unacquired module by performing such scheduling.

  As a scheduling method for acquiring unacquired modules, either the scheduling method described in FIG. 8 or the scheduling method described in FIG. 13 may be applied.

  For example, when the data amount of each unacquired module is large, the method of acquiring only the unacquired module described with reference to FIG. 8 can be applied in order to reduce the occupied time of the tuner.

  Further, when the data amount of each of the unacquired modules is small, for example, in order to reduce the number of timers (not shown) used at the time of scheduling, the unacquired modules are acquired including the acquired modules described in FIG. A scheme can be applied.

  Furthermore, in one download data to be acquired by the receiver 11, when a plurality of unacquired modules with a large amount of data and a plurality of unacquired modules with a small amount of data are mixed, the unacquired described with reference to FIG. The method of acquiring only the module and the method of acquiring an unacquired module including the acquired module described in FIG. 13 can be used in combination.

  As described above, the receiver 11 does not need to perform scheduling again so as to acquire all the modules even when acquisition of download data is interrupted due to a user operation or further radio wave interference or the like. Only modules can be acquired. Thereby, software update can be performed without delay.

  As described above, the receiver 11 compares the module ID of the module as the configuration data acquired when the download data was transmitted in the past with the module ID included in the SDTT that is the notification information, and the comparison result. If there is an unacquired module that is an unacquired module, set the acquisition start time to start acquisition of the unacquired module and the acquisition end time to end acquisition, and set the module according to the acquisition start time and acquisition end time. Since acquisition is performed, even when acquisition of download data is interrupted, only necessary modules can be acquired, and download data to be downloaded can be acquired at an early stage.

  Note that, by assigning a model ID for identifying a receiver to the module in the above description as shown in Patent Document 1 described above, the receiver can only receive the module necessary for the receiver. Download data can be acquired earlier.

  In the above description, the configuration data constituting the download data is described as a module. However, the content may be composed of one or more modules.

  Furthermore, the above-described processing can be applied to the case where the download data is composed of a single module as well as the case where the download data is composed of a plurality of modules.

  In the above, the embodiment in which the present invention is applied to the receiver 11 incorporating the monitor 32 has been described. However, the present invention is not limited to a receiver, set top box, PDA (Personal) connected to an external television receiver. It can be applied to Digital Assistant) and mobile phones.

  The series of processes described above can be executed by hardware or can be executed by software. When a series of processing is executed by software, a program constituting the software is installed from the recording medium 57 into the nonvolatile memory 53.

  In the present specification, the step of describing the program stored in the recording medium 57 is not limited to the processing performed in time series in the described order, but is not necessarily performed in time series. Or the process performed separately is also included.

  The embodiments of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

It is a block diagram which shows the structural example of one Embodiment of the receiver to which this invention is applied. 2 is a diagram illustrating an example of a functional configuration of a system controller 51. FIG. It is a figure which shows the format of SDTT. It is a block diagram which shows the structural example of a module acquisition part. It is a flowchart explaining a download process. It is a flowchart explaining the detailed example of all the module acquisition processes. It is a flowchart explaining the detailed example of an unacquired module acquisition process. It is a figure explaining the unacquired module acquisition process for every unacquired module. It is a flowchart explaining the detailed example of an acquisition time setting process. It is a block diagram which shows the other structural example of a module acquisition part. It is a flowchart explaining the detailed example of an acquisition time setting process in case the module acquisition part of FIG. 10 performs an unacquired module acquisition process. It is a flowchart explaining the other detailed example of an unacquired module acquisition process. It is a figure explaining the unacquired module acquisition process including the acquired module.

Explanation of symbols

  11 receiver, 31 antenna, 32 monitor, 33 speaker, 51 system controller, 52 volatile memory, 53 nonvolatile memory, 54 operation input unit, 55 bus, 56 drive, 57 recording medium, 58 front end unit, 59 demultiplexer , 61 video signal processing unit, 62 audio signal processing unit, 71 processor, 111 SDTT acquisition unit, 112 ID discrimination unit, 113 version comparison unit, 114 module comparison unit, 115 module acquisition unit, 116 storage control unit, 117 update unit, 131 Acquisition Time Setting Unit, 132 Acquisition Control Unit, 151 Acquisition Time Setting Unit, 152 Acquisition Control Unit, 171 Acquisition Time DB

Claims (7)

In the information processing apparatus for acquiring the download data according to the notification information for notifying the transmission of download data to be downloaded,
Comparison means for comparing the identification information of the configuration data constituting the download data acquired when the download data was transmitted in the past and the identification information included in the notification information;
As a result of the comparison, when there is unacquired configuration data that is unacquired configuration data, setting means for setting an acquisition start time for starting acquisition of the unacquired configuration data and an acquisition end time for ending acquisition;
An information processing apparatus comprising: an acquisition control unit that acquires the configuration data according to the acquisition start time and the acquisition end time. The notification information includes a transmission start time at which transmission of the download data is started, a transmission band indicating a data amount transmitted per unit time, and a data amount of each of the configuration data constituting the download data to be transmitted. Further including the configuration data size shown,
The information processing apparatus according to claim 1, wherein the setting unit sets the acquisition start time and the acquisition end time of the unacquired configuration data based on the transmission start time, a transmission band, and a configuration data size. Further comprising holding means for holding time information related to the acquisition start time and the acquisition end time of each of the configuration data when the download data has been transmitted in the past,
The setting unit sets the acquisition start time and the acquisition end time of the non-acquired configuration data based on the time information of the unacquired configuration data among the time information held by the holding unit. Item 4. The information processing apparatus according to Item 1. The information processing according to claim 1, wherein the acquisition control unit acquires the unacquired configuration data for each of the unacquired configuration data based on the acquisition start time and the acquisition end time of each of the unacquired configuration data. apparatus. The acquisition control means includes an acquisition start time of unacquired configuration data transmitted first in time among the unacquired configuration data and unacquired transmitted last in the unacquired configuration data The information processing apparatus according to claim 1, wherein configuration data transmitted between a configuration data acquisition end time is acquired. In the information processing method of the information processing apparatus for acquiring the download data according to the notification information for notifying the transmission of download data to be downloaded,
Comparing the identification information of the configuration data constituting the download data acquired when the download data was transmitted in the past with the identification information included in the notification information;
As a result of the comparison, when there is unacquired configuration data that is unacquired configuration data, an acquisition start time for starting acquisition of the unacquired configuration data and an acquisition end time for ending acquisition are set.
An information processing method including the step of acquiring the configuration data according to the acquisition start time and the acquisition end time. In a program that causes a computer to function as an information processing apparatus that acquires the download data in accordance with notification information for notifying transmission of download data to be downloaded,
Comparison means for comparing the identification information of the configuration data constituting the download data acquired when the download data was transmitted in the past and the identification information included in the notification information;
As a result of the comparison, when there is unacquired configuration data that is unacquired configuration data, setting means for setting an acquisition start time for starting acquisition of the unacquired configuration data and an acquisition end time for ending acquisition;
A program that causes a computer to function as an acquisition control unit that acquires the configuration data according to the acquisition start time and the acquisition end time.

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