JP2012016001A - Broadcast service receiving device and program thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To receive a program schedule table which is required to perform cumulative reservation of multiple contents on a reception side at the time of receiving contents files by broadcast wave of digital broadcast.SOLUTION: A program schedule table includes a service ID, an event identifier and a file transmission descriptor. The file transmission descriptor is configured to include file classification information and identifies a content associated in the received program schedule table with the event identifier concerning organization in time base direction of a content file which is able to be cumulation-reserved. A classification of the content of the content file that is identified by the event identifier is identified with the file classification information and a cumulative reservation management table is generated. A content cumulative reservation control section 29 controls start of the cumulative reservation at a start time for the content which is defined to be cumulation-reserved in the cumulative reservation management table, and executes cumulation of the content which is cumulation-reserved at the start time for each data block of carousel system.

Description

  The present invention relates to a technique for distributing broadcast program table data from a broadcast station side by broadcast waves and enabling acquisition of an arbitrary file in a file format stored (downloaded) and distributed from a broadcast station on a reception side. The present invention relates to a broadcast service receiving apparatus for storing (downloading) and receiving an arbitrary file and a program thereof.

  2. Description of the Related Art Conventionally, a system using an EPG (Electric Program Guide) is known as a system in which a receiving device receives data related to broadcast content distributed from a broadcasting station, creates a content table, and obtains desired content from the content table. (See Patent Documents 1 and 2).

  Usually, in a system using EPG, the receiving device acquires and displays desired content from a dedicated content server based on the content table, and the receiving device manages the broadcast date and time based on the content table. Some of them store content that will be broadcast.

  When the source of the content is digital broadcasting, the reception frequency and transport stream identification (TSID) are switched at a constant cycle so that each channel is sequentially selected, and TS data is transmitted in units of packets, and the beginning of the packet A PID (Packet Identification) is added to the part. The receiving device converts the data into video data, audio data, data broadcasting data, subtitle data, etc. by converting the data into a transport stream (TS) signal in the demodulator, and PAT ( PID of each data is detected based on PSI (Program Specific Information) data such as Program Association Table) and PMT (Program Map Table), and the video data, audio data, and EPG data are identified by reading this PID. .

  Data necessary for configuring the EPG is transmitted in a data structure defined by a standard “program display information used for digital broadcasting” or the like in the Japan Radio Industry Association (commonly known as ARIB). As main configuration data, SDT (Service Description Table) that transmits information related to the organization channel, such as the name of the organization channel and the name of the broadcaster, the name of the content to be broadcast, the broadcast start date and time, the content description, etc. Examples include an EIT (Event Information Table) for transmitting information, a TOT (Time Offset Table) for transmitting current date and time information, and the like. The EIT is described in “ARIB TR-B14 Volume 4 Terrestrial Digital Television Broadcasting PSI / SI Operation Regulations”.

  That is, in the system that stores (downloads) the broadcast content by managing the broadcast date and time based on the content table on the receiving device side, the transmission side generates and converts the data and content related to the broadcast content into TS TS is transmitted by broadcast wave of digital broadcasting. The receiving apparatus demodulates the broadcast wave, decodes the TS, extracts the EIT from the TS, creates an electronic program guide (EPG) using the EIT, and displays the EPG on the screen.

  In addition, a plurality of contents associated with the EIT are acquired by switching for each contents using download related information DII (Download Information Indication) / download data block DDB (Download Data Block) information extracted from the selected broadcast stream. (For example, refer to Patent Document 3).

  Therefore, the conventional technology for transmitting and receiving broadcast services is an EPG in which a receiving device creates a broadcast content table based on broadcast SI information distributed from a broadcast station, and views or schedules desired content. It is configured as a system using

  On the other hand, the technique of distributing an arbitrary file from a broadcasting station by storage (downloading) distribution and acquiring it by a receiving device is described as “unique data broadcasting” in ARIB STD-B24, and the operation rules for terrestrial digital audio broadcasting Is defined as the E-profile of TR-B13.

JP 2007-36726 A JP 2001-136495 A JP 2005-197992 A

  However, in the conventional EPG, there is no information related to downloading an arbitrary file in the broadcast SI information, and therefore an EPG for downloading an arbitrary file cannot be realized.

  In addition, in the E profile of digital radio, it is possible to grasp what kind of file has been distributed until the receiving apparatus receives the entire broadcast signal including the arbitrary file to be downloaded, decodes it and develops it in the memory. It was not possible, and the processing cost of the receiving device and the received power were inefficient.

  In recent years, there has been an increasing demand for broadcasting services for portable receiving terminals such as multimedia broadcasting assuming mobile reception by mobile receiving terminals. Therefore, there is a demand for the construction of a broadcasting system that can receive stored content).

  In particular, assuming that traffic information is transmitted in a broadcasting service, it is always necessary to distribute new information, and the receiving device side also makes effective use of a limited memory capacity, for example, the same type that is stored (downloaded) broadcasted. It is necessary to build a broadcasting system that can overwrite and update the content files.

  Accordingly, an object of the present invention is to provide a broadcast service receiving apparatus and program for storing (downloading) and receiving an arbitrary file.

  In the present invention, an extended EIT is configured by adding a “file transmission descriptor” (file_delivery_descriptor), which is a new descriptor in the EIT, as a specific example, in the broadcast SI information constituting the EPG on the transmission device side. The receiving device identifies any content file for storage (download) broadcasting included in the “file transmission descriptor” (hereinafter, also collectively referred to as “arbitrary file”), and any content. It is possible to immediately grasp whether the file has been distributed, and to update the same type of content file as necessary. It is also possible to construct a broadcasting system so that a dedicated table other than the EIT is provided and a “file transmission descriptor” is added to the dedicated table for transmission.

  In other words, the receiving device of the present invention is a receiving device that receives a program schedule table required to reserve the storage of the plurality of contents on the receiving side when receiving a content file by a digital broadcast wave. The program schedule table includes a service ID that uniquely designates a service that broadcasts each content file, a start time, a broadcast duration, and an event identifier that uniquely represents a program event that stores (downloads) the content file; A file transmission descriptor, the file transmission descriptor includes file type information for identifying the contents of a content file, receives the program schedule table, and associates the content associated in the program schedule table with the content When content files can be reserved A storage reservation that identifies the organization in the axial direction by the event identifier, and identifies the content type of the content file identified by the event identifier by the file type information, and generates a storage reservation management table for making a storage reservation Management table generation means, content storage reservation control means for controlling the start of storage reservation at the start time for content specified to be reserved in the storage reservation management table, and storage of content reserved for storage at the start time Content storage execution means for executing data in units of carousel data blocks.

In the receiving apparatus of the present invention, the program schedule table is configured by adding a file transmission descriptor to the EIT.
In the receiving device of the present invention, the storage reservation management table generating means receives the program schedule table, determines whether there is a content file that can be reserved for storage, and discards information that cannot be stored. It has a file determination means.
In the receiving device of the present invention, the event identifier is added in association with a download ID in the carousel type DII, and the content storage execution means is a DDB of the content file to be stored in the carousel type. Until the storage of the data is completed, a means for acquiring and storing the DDB of the difference representing the unacquired DDB within the range of the predetermined number of broadcasts of the carousel method is characterized.
In the receiving device of the present invention, the event identifier is added in association with a download ID in the carousel DII, and the content storage execution unit is configured to store the content file determined by the file type information. The content type is characterized in that when the same content file is scheduled to be downloaded among time-organized content files, the content file has means for overwriting and accumulating the content file according to the branch number.
In the receiving device of the present invention, the event identifier is associated with a branch number representing a further subdivided content of the content file identified by the file type information, and the branch number is associated with a carousel DII. The content storage execution unit is configured to perform download broadcasting of the same content file among content files whose content file type determined by the file type information is time-organized. If it is scheduled, it has means for overwriting and accumulating the content file according to the branch number.

  Furthermore, the present invention provides a computer configured as a receiving device that receives a program schedule table required to reserve and store a plurality of contents on the receiving side when receiving a content file using a digital broadcast wave. The program schedule table includes a service ID that uniquely designates a service that broadcasts each content file, an event identifier that uniquely indicates a start time, a broadcast duration, and a program event that downloads the content file, and a file transmission descriptor. The file transmission descriptor includes file type information for identifying the content of the content file, receives the program schedule table, and stores the content associated with the program schedule table in the storage reservation. When in file Identifying the organization in the axial direction with the event identifier, identifying the content file content type identified with the event identifier with the file type information, and generating a storage reservation management table for making a storage reservation; , The step of controlling the start of storage reservation at the start time for the content specified to be reserved for storage in the storage reservation management table, and the storage of the content reserved for storage at the start time is executed in units of carousel data blocks And a step for executing the program.

  According to the present invention, the transmission device can perform storage (download) broadcasting of an arbitrary file that can be identified by the extended EIT or the dedicated table on the reception device side, and the reception device can realize the storage (download) reservation function, It is possible for the device to efficiently minimize power and receive only arbitrary files identified by the extended EIT or the dedicated table.

  In addition, the transmission device includes file type information (file_type_value) that can be grasped as the same type of content files to be stored (downloaded) in the “file transmission descriptor”, thereby creating a future file format that does not currently exist. As an identifier that can be supported, transmission of an arbitrary file in a broadcasting system can be further expanded.

  In addition, EIT reservation information can be expanded relatively easily in a manner in accordance with the current operation of digital broadcasting by distributing EIT event identifier (event_id) and download ID (dounloadID) as matched information. Files that are actually stored (downloaded) can be linked to each other, and arbitrary files can be overwritten and updated efficiently. For example, it is possible to efficiently store repeated downloads and efficiently download files using difference information. To obtain arbitrary files and to store (download) data that needs to be overwritten and updated as sequentially updated information such as traffic information.

It is a schematic block diagram of the broadcasting system of one Example by this invention. It is the schematic of the broadcasting station side transmission apparatus of one Example which concerns on this invention. It is the schematic of the receiver of one Example which concerns on this invention. It is operation | movement explanatory drawing of the broadcasting system of one Example by this invention. It is a figure which illustrates the module of DII and DDB. It is a figure which illustrates the accumulation | storage content of 3 channels multiplex-transmitted with the broadcasting system of one Example by this invention. It is a figure which illustrates extended EIT which carries out multiple transmission in the broadcasting system of one Example by this invention. It is a figure which illustrates the accumulation | storage content which carries out accumulation | storage (download) broadcasting by the carousel system in the broadcasting system of one Example by this invention. It is a block diagram of the content storage reservation control part of the receiver in the broadcasting system of one Example by this invention. It is operation | movement explanatory drawing of the content storage reservation control part of the receiver in the broadcasting system of one Example by this invention. It is a figure which illustrates the data structure at the time of accumulation reservation of accumulation | storage content and accumulation | storage execution which accumulate | store (download) broadcast by the carousel system in the broadcasting system of one Example by this invention. It is a figure which illustrates the storage reservation management table | surface used with the receiver in the broadcasting system of one Example by this invention. It is a figure which illustrates the stored content management table used with the receiver in the broadcasting system of one Example by this invention. (A), (B), (C) is a figure explaining the correlation with the extended EIT and the carousel system in the broadcasting system of one Example by this invention. (A), (B), (C) is a figure explaining the correlation with the service channel and carousel system in the broadcasting system of one Example by this invention. It is a figure explaining the correlation with the event identifier and download ID of a carousel system in extended EIT in the broadcasting system of one Example by this invention. (A), (B) is a figure which illustrates the branch number of the event identifier in extended EIT in the broadcasting system of one Example by this invention. It is a figure explaining the correlation with the service channel in the broadcasting system of one Example by this invention, and the data event identifier of a carousel system. FIG. 6 is a diagram illustrating a file transmission descriptor according to the present invention.

  Hereinafter, an embodiment of a broadcasting system of a broadcasting service for storing (downloading) delivering / receiving an arbitrary file according to the present invention will be described. From the description of the broadcasting system according to the present embodiment, the configurations of the transmission device and the reception device according to the present invention are also clarified.

[System configuration]
FIG. 1 is a schematic configuration diagram of a broadcasting system according to an embodiment of the present invention. The broadcasting station side transmitting apparatus 1 receives each data such as video data, audio data, data broadcasting data, and subtitle data of stored content by digital broadcasting (in FIG. 1, in-vehicle / portable receiving terminal 2- 1, a mobile phone 2-2 is exemplified, but in the following description, it is a device that is distributed toward a “reception device 2” in general, and in particular, among information on broadcast SI that constitutes an EPG. In addition, as a specific example, a device that adds a new file descriptor “file transmission descriptor” in the EIT and configures and transmits the extended EIT. Details of the “file transmission descriptor” will be described later.

  The receiving device 2 grasps what kind of content file has been distributed by this “file transmission descriptor”, and stores the “storage reservation management table” for managing the storage reservation of the content file and the storage of the content file. This is an apparatus that generates an “accumulated content management table” for managing presence / absence, and manages accumulation of accumulated content to be distributed by user designation or based on automatic setting.

  As will be described in detail later, the “file transmission descriptor (file_delivery_descriptor)” includes “descriptor tag information (descriptor_tag)” for identifying the organization that uses the file transmission descriptor set by the standardization organization, and the file transmission. To describe “descriptor length (descriptor_length)” indicating the length of the descriptor, “file type information (file_type_value)” for identifying the contents of the content file on the receiving device side, and any other information than the above Including “reserved_future_use”. In the present embodiment, the broadcasting station-side transmitting device 1 adds this “file transmission descriptor” to an existing EIT to constitute an “extended EIT” for transmission. It is also possible to construct a broadcasting system so that a dedicated table other than the EIT is provided and a “file transmission descriptor” is added to the dedicated table for transmission. It should be noted that a “file transmission descriptor (file_delivery_descriptor)” to be newly added to the existing EIT is preferably additionally described in the PMT. In this case, the association with the stored content can be reconfirmed. The “file type information (file_type_value)” is preferably managed by an organization that follows the standardization organization, or an operating platform company, and is disclosed to broadcasters, manufacturers, and the like. Thus, the receiving device 2 can grasp the contents of the distributed file before actually receiving the arbitrary file, and can determine whether or not the file can be received.

  In current digital broadcasting, an event identifier (event_id) uniquely indicating each program is described in an EIT describing program information. The event identifier (event_id) is operated by the broadcasting station as a unique value for a fixed time, for example, within 24 hours. Then, after a certain period of time, it is reassigned as a unique value again. In the present invention, an event identifier (event_id) is assigned to each arbitrary file to be stored (downloaded), and when the same file is repeatedly distributed for a certain time, for example, 24 hours or one week, the same file is stored. The event identifier (event_id) is repeatedly used. By repeatedly delivering the same file, the receiving device 2 has an increased chance of receiving it even when it is moving, and can be reliably received. Further, the receiving device 2 can determine that it is not necessary to receive the same file if it has already been received by checking the event identifier (event_id). Note that the standardization organization or the like defines how long the event identifier (event_id) value is unique.

  FIG. 2 is a schematic diagram of the broadcasting station side transmitting apparatus 1 according to an embodiment of the present invention. The broadcast station side transmission apparatus 1 includes a content organization unit 10, a carousel processing unit 11, a PSI / SI generation encoding unit 12, a multiplexing unit 13, an OFDM modulation unit 14, and a transmission unit 15. The content organization unit 10 includes a content generation unit 101, a control data generation unit 102, and an EIT generation unit 103. The control data generation unit 102 includes an identifier numbering control unit 1021 and a transmission count / cycle management unit 1022. The EIT generation unit 103 includes a file transmission descriptor generation unit 1031.

  The content organization unit 10 generates stored content for distribution by broadcast waves, and generates a program schedule as basic data for making a storage reservation on the receiving side associated with the “extended EIT”. Composed. “Extended EIT” is an existing EIT with a “file transmission descriptor” added to receive or update information related to stored content without substantially increasing the transmission capacity compared to the conventional EIT. The burden is greatly reduced (details will be described later).

  More specifically, the content generation unit 101 generates stored content and generates a content file. For example, in the case of a TS file, video, audio, data, subtitles, and PSI, which are elements that organize stored content, are generated and encoded, multiplexed (packaged), and a TS is generated. The PSI is information such as PAT and PMT necessary for reproducing the TS on the receiving side.

  When the content transmitted through the content generation unit 101 is transmitted by the carousel processing unit 11 by the carousel method, the control data generation unit 102 receives the download ID (downloadID) and the EIT event identifier (event_id) in the DII message. An identifier numbering control unit 1021 that controls transmission in an associated manner, a transmission number of data blocks (DBB) transmitted in a carousel method for each event identified by an event identifier (event_id), and a carousel method The transmission frequency / cycle management unit 1022 manages the cycle of transmission. In order to manage the stored content transmitted by the carousel method as an event identified by the event identifier (event_id), the identifier numbering control unit 1021 has a function of sending the event identifier (event_id) to the EIT generating unit 103. That is, the content file is transmitted at a constant frequency according to the set transmission cycle, and this transmission cycle can be set for each stored content, and can be set, for example, between 5 minutes and 120 minutes.

  The EIT generation unit 103 incorporates the event identifier (event_id) obtained from the identifier numbering control unit 1021 into the existing EIT used to store the stored content for distribution on the broadcast wave on the receiving device side, A “file transmission descriptor (file_delivery_descriptor)” including “type information (file_type_value)” is generated and added, and an extended EIT is formed and sent to the PSI / SI generation encoding unit 12 as EIT program information (EIT). The file transmission descriptor generation unit 1031 has a function of generating “file transmission descriptor (file_delivery_descriptor)” including “file type information (file_type_value)” indicating the type of content of the content file identified by the event identifier (event_id). Have.

  The carousel processing unit 11 converts the stored content encoded by the content generation unit 101 into the number of transmissions and the transmission cycle of the carousel method by the control data generation unit 102, the download ID (downloadID) in the DII message, and the event identifier (event_id) ) Are related to each other to construct a DII and DDB module and send them to the multiplexing unit 13.

  For example, as shown in FIG. 5, the content data is multiplexed so that it can be identified by component tags (component_tag: ESm to ESn) in the channel (Ch) representing the service ID of the stored content distribution. A plurality of stored contents associated with the EPG in the extended EIT (in this embodiment, generated from EIT program information (EIT) including “file transmission descriptor”) are extracted from the selected broadcast stream. The download data block (DDB) can be switched and acquired for each stored content identified by the event identifier (event_id) using the DII / DDB information. Note that the stored content can also be configured by one or a plurality of modules and transmitted.

  The PSI / SI generation / encoding unit 12 generates and encodes PSI / SI information (that is, EIT program information (EIT)) necessary for receiving the broadcast wave by the receiving device 2, and sends the PSI / SI information to the multiplexing unit 13. To do. This EIT program information (EIT) includes an extended EIT, a start time at the time of broadcasting each stored content, a broadcast duration, and an “event identifier” that uniquely represents a program event that stores (downloads) a content file. / SI information.

  The multiplexing unit 13 multiplexes the carouseled content data, PSI / SI, and the like for each channel, forms a TS, and sends the TS to the OFDM modulation unit 14.

  The OFDM modulation unit 14 modulates the TS obtained through the multiplexing unit 13 with a modulation method according to the OFDM method of digital broadcasting, and transmits the TS as a broadcast wave to the outside via the transmission unit 15.

  As described above, the broadcasting station-side transmission device 1 transmits the extended EIT at a constant frequency, and transmits the stored content based on the extended EIT by the carousel transmission method. As will be described in detail later, the broadcasting station-side transmission device 1 rebroadcasts each stored content in a data block associated with an event identifier (event_id) associated with a download ID (downloadID) according to the extended EIT. The receiving apparatus 2 can know the number and period of rebroadcast from the extended EIT (see FIG. 11).

  FIG. 3 is a schematic diagram of a receiving device 2 according to an embodiment of the present invention. The receiving apparatus 2 includes an OFDM demodulating unit 20 having a receiving antenna, a TS decoding unit 21, an audio decoding unit 22, a video decoding unit 23, a caption / character super decoding unit 24, a carousel processing unit 25, and a BML. A browser 26, a presentation processing unit 27, an SI processing unit 28, a content storage reservation control unit 29, a content storage unit 30, a stored content list display / playback instruction unit 31, and a user I / F unit 32 are provided. .

  The OFDM demodulator 20 demodulates EIT program information (EIT) constituting the data of the extended EIT, receives the function of sending this TS to the TS decoder 21, and the stored content data corresponding to this extended EIT, It has a function of demodulating via the OFDM demodulator 20 and sending this TS to the TS decoder 21. In digital broadcasting, content data and extended EIT data can be identified by detecting the PID in the TS data and reading this PID, detecting the ES number (component_tag) and reading this ES number Thus, the desired data can be identified.

  The TS decoding unit 21 decodes the EIT program information (EIT) obtained through the OFDM demodulation unit 20 to decode the extended EIT data, and sends it to the SI processing unit 28. The TS decoding unit 21 is obtained through the OFDM demodulation unit 20. The content data corresponding to the extended EIT of the EIT program information (EIT) is decoded and transmitted to the audio decoding unit 22, the video decoding unit 23, the caption / character super decoding unit 24, and the carousel processing unit 25, which are the corresponding functional units. . The audio decoding unit 22, the video decoding unit 23, and the caption / character super decoding unit 24 each have a function of decoding the audio, video, subtitle, and character superimposing the stored content and sending them to the presentation processing unit 27. The processing unit 25 has a function of decoding data broadcast data for organizing stored content while performing carousel processing according to a carousel method corresponding to the transmission side, and sending the decoded data to the BML browser 26. The decoded data for data broadcasting is converted according to the drawing method defined by the BML browser 26 and sent to the presentation processing unit 27. The presentation processing unit 27 has a function of presenting audio, video, subtitles, character superimposing, and other data for organizing stored content on an external device (for example, a display device or a speaker).

  However, the carousel processing unit 25 controls the acquisition and storage of content data corresponding to the extended EIT according to a control signal from the content storage reservation control unit 29, and the content storage unit 30 stores the content data corresponding to the extended EIT. To accumulate. The content data stored in the content storage unit 30 is managed by the content storage reservation control unit 29. The content storage reservation control unit 29 performs overwriting update or storage reservation of the stored content acquired in units of data blocks according to the extended EIT. It has a function of storing and updating the “storage reservation management table” for managing the storage reservation of content files used for control and the “storage content management table” for managing whether or not content files are stored in the content storage unit 30. .

  The content files stored in the content storage unit 30 and the “storage reservation management table” and “stored content management table” are stored so that the user can display or play them by designating via the user I / F unit 32. The content list display / playback instruction unit 31 controls display or playback.

  The “storage reservation management table” is used as an EPG that can specify the broadcast time, title, series, and genre for each stored content according to the broadcast time axis (see FIG. 12). In addition, the “stored content management table” is configured in such a manner that it is possible to manage whether or not each stored content has been stored and whether or not there is an unstored DDB (see FIG. 13).

  The SI processing unit 28 receives the EIT information of the broadcast content for each channel by inputting the extended EIT data, the broadcast start time of each stored content, the broadcast duration, and the program event for storing (downloading) the content file. PSI / SI information (that is, EIT program information (EIT)) including the uniquely represented “event identifier” is sent to the content storage reservation control unit 29.

  Although details of the content storage reservation control unit 29 will be described later, the content storage reservation control unit 29 has a function of controlling the storage reservation operation of the stored content specified by the “storage reservation management table” by the user. For example, the content storage reservation control unit 29 generates a “storage reservation management table” to manage the storage reservation state of the specified stored content, and indicates whether or not each storage content is waiting for storage reservation Thus, it is possible to manage the storage reservation control of the stored content.

  Next, the file transmission descriptor will be described.

[File transmission descriptor]
FIG. 19 is a diagram illustrating a file transmission descriptor according to the present invention.
“Descriptor tag information (descriptor_tag)” specifies an organization that uses the file transmission descriptor set by the standardization organization.
“Descriptor length (descriptor_length)” describes the descriptor length of the file transmission descriptor. “File type (file_type_value)” describes the type of file to be transmitted.
“Content type (content_type_value1)” describes the type of stored content to be transmitted.
“Content update type (content_type_value2)” describes the type of update of stored content to be transmitted.
“Main part / supplement type (content_type_value3)” describes the main part / supplement type of the stored content to be transmitted.
“Content volume (content_volume)” describes the volume of stored content. If the stored content capacity is unknown, “0xFFFF” is described.
“Content bit rate (content_bit_rate)” describes an approximate reproduction rate of stored content. If the stored content playback rate is variable or unknown, “0xFFFF” is described.
“Transmission bit rate (transmission_bit_rate)” describes an approximate transmission rate of the stored content. If the transmission rate of stored content is variable or unknown, “0xFFFF” is described.
“Event_id branch number (ex_event_id)” describes an item identification value of stored content. If the stored content item identification value is not used, “0xFFF” is described.
“Data event identifier (data_event_id)” describes the version value of the stored content. When the stored content version is not used, “0xF” is described.
“Reserved (reserved_future_use)” describes arbitrary information other than the above.

  The loop count N of ex_event_id and data_event_id is N = 1 for general stored content and constantly updated stored content, and N = number of items for stored content whose items are updated. In the case of supplementary information, N = 1. Note that N is determined in a range where the section length of the entire EIT is within 4093 bytes.

  Table 1 shows examples of file_type_value values, Table 2 shows examples of content_type_value1 values, Table 3 shows examples of content_type_value2 values, and Table 4 shows examples of content_type_value3 values.

  In real-time broadcasting services, event_id is used for program identification, but in storage (download) services, event_id branch number (ex_event_id) and data_event_id are used in addition to event_id. That is, in the storage (download) service, the stored content is uniquely specified by event_id + ex_event_id + data_event_id. Table 5 shows content identification information, the number of bits, and identification contents of the storage (download) service.

  When storing (downloading) general stored content, it is possible to uniquely specify the stored content by specifying event_id. However, if you want to uniquely specify items in the stored content, such as news programs, event_id Ex_event_id is used in addition to. For example, when event_id = “0x0001” is “national news”, the item “national news” can be uniquely specified by specifying ex_event_id. An example of this is shown below.

<Event_id><ex_event_id> Meaning
0x0001 0x000 "National News" item 0
0x0001 0x001 "National News" item 1
0x0001 0x002 "National News" item 2

  When identification of items in stored content is necessary, ex_event_id value is always assigned, and when identification of items in stored content is unnecessary, ex_event_id = "0xFFF" or ex_event_id is not used . If the value of ex_event_id is 12 bits, the designation of different items can be a maximum of 4096 types (exactly 4095 types except 0xFFF).

  In addition, in the accumulation (download) service, it is possible to transmit the accumulated content of the same content multiple times and use it as a supplement for missing data on the receiving device 2 side, but partially change the content in the second and subsequent transmissions It is assumed that stored contents with different versions are transmitted. In this case, if missing data is complemented in a state in which the version change is not known to the receiving side, data such as video and audio at the changed portion becomes discontinuous, which hinders viewing of stored content. Thus, when stored contents having different versions are sent, different data_event_id values are assigned to enable version management on the receiving device 2 side. For example, when event_id = “0x0001” is “national news”, the item “national news” including the version can be uniquely specified by specifying ex_event_id and data_event_id. An example of this is shown below.

<Event_id><ex_event_id><data_event_id> Meaning
0x0001 0x000 0x0 Ver0 of “National News” item 0
0x0001 0x000 0x1 "National News" item 0 Ver1
0x0001 0x001 0x0 Ver0 of “National News” item 1
0x0001 0x002 0x0 Ver0 of “National News” item 2

  When the stored content version needs to be identified, the value of data_event_id is always given. When the version identification is not necessary, data_event_id = “0xF” or data_event_id is not used. Note that the value of data_event_id is 4 bits, and different versions can be specified up to 16 types (exactly 15 types except 0xF).

  In addition, in a storage (download) service, transmission is usually performed at a predetermined time and stored content is automatically stored in the receiving device 2, but transmission is always performed like traffic information. In other words, a service in which the latest information is always presented by the receiving device 2 is also assumed. In the case of such constantly updated accumulated content, a constant value is sent for event_id, ex_event_id indicates an item in the accumulated content, and data_event_id indicates the version of each item. For example, when event_id = “0x0002” is “traffic information”, by specifying ex_event_id and data_event_id, each prefecture item of “traffic information” can be uniquely specified including the version. An example of this is shown below.

<Event_id><ex_event_id><data_event_id> Meaning
0x0002 0x000 0x0 "Traffic Information" Prefecture 0 Ver0
0x0002 0x000 0x1 "Traffic Information" Prefecture 0 Ver1
0x0002 0x000 0xE "Traffic Information" Prefecture 0 Ver14
0x0002 0x001 0x0 "Traffic Information" Prefecture 1 Ver0
0x0002 0x002 0x0 "Traffic Information" Prefecture 2 Ver0

  In the case of the above example, the receiving device 2 presenting information on prefecture 0 presents information on Ver0 when receiving Ver0 data, and presents information on Ver1 when receiving Ver1 data. Similarly, when Ver14 data is received, Ver14 data is presented. After Ver14, the process returns to Ver0, and the same operation is repeated.

  In addition, even in constantly updated accumulated content, if the item in the accumulated content needs to be identified, the value of ex_event_id is always given, and if identification of the item in the accumulated content is not necessary, ex_event_id = “0xFFF” Or ex_event_id is not used. If the stored content version needs to be identified, the value of data_event_id is always assigned. If the version identification is not necessary, data_event_id = “0xF” or data_event_id is not used.

  Next, a typical operation of the broadcasting system including the broadcasting station side transmitting device 1 and the receiving device 2 will be described.

[System operation]
FIG. 4 is an explanatory diagram of the operation of the broadcasting system of one embodiment according to the present invention.

  First, the operation of the broadcast station side transmission apparatus 1 will be described. The broadcast station side transmission apparatus 1 distributes EIT program information (in this example, the extended EIT included in the EIT) constituting the extended EIT data at regular intervals. (Steps S1 to S3). In addition, information on the current program and the next program (EITp / f) including whether there is a change in the program information to be broadcast time-organized according to the extended EIT is distributed (step S4). Here, unlike the case of re-requesting and re-transmitting stored content by bidirectional communication such as general network communication, since it is broadcast content, it is assumed in advance that reception failure occurs on the receiving device side. The control data generation unit 102 included in the broadcasting station-side transmission device 1 transmits and retransmits the content data managed by the event identifier (event_id) according to the extended EIT in a carousel method at a predetermined period and the number of times according to the extended EIT ( Steps S5 and S6).

  For example, as shown in FIG. 6, the broadcasting station side transmitting apparatus 1 includes a main channel (main ch1) for transmitting program contents of real-time broadcasting in time organization within one TS (one-segment or three-segment broadcasting), and the main channel. A unique channel (unique ch1) used uniquely by the content provider that multiplexes and transmits an arbitrary file (for example, a video file, PDF, TS file, 3GPP, etc.) linked to the program content of ch1, and the main ch1 A second unique channel (uniquely used by the content provider) that multiplexes and transmits independent arbitrary files (for example, traffic information that requires real-time update) without being linked to the program content The stored contents of the three channels of ch2) are multiplexed and transmitted.

  The stored contents of these main ch1, original ch1 and original ch2 can not only identify the channel type by the service ID (serviceID) but also the time from the extended EIT according to the present invention that functions as EIT program information (EIT). The organization in the axial direction is also identified by the event identifier (event_id), and the content file content type identified by the event identifier (event_id) is set to “file type information (file_type_value) in“ file transmission descriptor (file_delivery_descriptor) ”. For example, an EPG organized as shown in FIG. 6 can be constructed immediately.

  For example, as shown in FIG. 7, the extended EIT is configured in such a manner that a “file transmission descriptor (file_delivery_descriptor)” is added to an EIT having an existing descriptor. “File transmission descriptor (file_delivery_descriptor)” includes “descriptor tag information (descriptor_tag)” for specifying the organization that uses the file transmission descriptor set by the standardization organization, and the length of the file transmission descriptor. "Descriptor length (descriptor_length)" to represent, "File type information (file_type_value)" for identifying the content of the content file on the receiving device side, and "Reserved (reserved_future_use)" for describing arbitrary information other than the above Etc.

  Accordingly, the receiving device 2 decodes the extended EIT according to the present invention that functions as EIT program information (EIT), and grasps the channel-specific contents for each channel of the main ch1, the original ch1, and the original ch2 by the service ID. The organization of each channel in the time axis direction is identified by the event identifier (event_id), and the content file type identified by the event identifier (event_id) is set to “file transmission descriptor (file_delivery_descriptor)” Identification by “type information (file_type_value)”, and an EPG content program list can be immediately constructed.

  Hereinafter, the operation of the receiving device 2 will be described.

  The receiving device 2 receives the EIT program information (EIT), decodes the extended EIT, grasps the channel-specific stored contents for each channel of the main ch1, the original ch1, and the original ch2, with the channel type, and the time in each channel. The type of content file identified by the event identifier (event_id) for the organization in the axial direction and the content type identified by the event identifier (event_id) is set in the “file type information (file_type_value)” in the “file transmission descriptor (file_delivery_descriptor)” In step S13, it is determined whether the stored content in the extended EIT is a file that can be stored as a content file.

  Subsequently, the receiving device 2 specifies a broadcast time, a title, a series, and a genre for each stored content according to a time axis that is broadcast for a file that can be stored, and generates a “storage reservation management table” to be used as an EPG. It can be presented to the user of the receiving device 2 (step S14). The receiving apparatus 2 sets and registers the storage content designated by the user as a storage reservation in the “storage reservation management table”, activates the storage reservation immediately before the broadcast time, and is a broadcast program that is time-organized according to the extended EIT The current program and the next program (EITp / f) including the presence / absence of the change are received (step S15). Accordingly, the receiving device 2 reacquires the extended EIT a few minutes before the reservation time to confirm that there is no change in the broadcast content, and when there is a change, automatically updates the registered content of the storage reservation management table.

  The receiving device 2 controls the storage reservation of the stored content according to the registration content of the storage reservation management table. When the broadcast time comes, the DII of the corresponding elementary stream (ES) is acquired, and the event identifier ( The content file to be stored (downloaded) is specified by the download ID (downloadID) associated with event_id), the data block (DDB) string in the corresponding module is received, and the stored content is stored (step S16). When the corresponding stored content is module-linked, the data block (DDB) sequence in the corresponding plurality of modules is received and stored. The reception device 2 receives and executes the storage operation if the storage content reserved for storage is being broadcast according to the broadcast start time (start_time), and the storage device performs storage operation outside the broadcast start time (start_time) (storage reserved for storage). If the content is not broadcast), it is registered in the storage reservation management table and waits until the broadcast time. Even when all the data constituting the stored content cannot be received at one time due to poor reception, the stored content can be reacquired within the number of carousels transmitted in the carousel method because it is transmitted in DDB units. If there is, the data can be stored in units of DDBs that have failed to be received, and if reception fails within the number of carousels, they can be acquired at the time of rebroadcasting. Since this rebroadcast date and time information is embedded in advance in the extended EIT, the receiving apparatus 2 can automatically reacquire it according to the registered contents of the storage reservation management table.

  The receiving device 2 deletes the registration of the storage reservation management table for the stored content that has been stored, and registers it in the stored content management table to manage the storage status. For example, when the storage of the stored content is completed, it is registered in the stored content management table, and the marking is deleted from the storage reservation management table so that reacquisition at the time of rebroadcasting is not executed. Furthermore, when it cannot accumulate completely within 1 cycle (carousel cycle), it acquires again in the next cycle (carousel cycle). However, the accumulated data (DDB unit) is saved (temporarily saved) without being discarded, and if there is an unacquired DDB, the DDB differential accumulation of the content file is executed (step S17). In addition, using the broadcast duration information in the extended EIT, when the broadcast time of the cycle ends without being completed, if there is a rebroadcast, it is determined that the reservation storage is interrupted, If there is no rebroadcast, it is determined that the reservation accumulation is canceled.

  In addition, when the receiving device 2 accumulates a content file in which the branch number is the same as the event identifier (event_id) in the download ID (downloadID) and only the data event identifier (data_event_id) is updated, it is overwritten as an update file. Accumulation can be performed (step S18).

  The receiving apparatus 2 preferably creates a list of stored contents (stored content management table) stored for each series and genre so as to be presented to the user (step S19). The user can delete unnecessary stored content from the stored content management table by a predetermined operation. Of the stored contents of the series, those with a short broadcast interval can be deleted from the oldest ones. (When the series is reserved, the user can specify the number to be stored and whether to overwrite or not.) It is also possible to store a plurality of stored contents in a pattern in units of series or categories.

  The receiving device 2 can reproduce the stored content specified by the user (step S20). For example, when the receiving device 2 is configured by a mobile phone, information can be obtained by designating a plurality of stored contents included in the title of the stored contents displayed on the screen via the user interface. When video, audio, data broadcast, and caption data are associated with the stored content, these data can be reproduced. For example, a thumbnail image of the stored content can be transmitted to the data broadcast of the stored content, and can be used when the storage reservation content table is displayed on the receiving device 2 side.

  In this way, the receiving device 2 receives the extended EIT to be transmitted, creates a storage reservation management table, performs control management of storage reservations using this storage reservation management table, and receives and automatically stores stored content. . In particular, when the receiving device 2 is a mobile receiving device (for example, a cellular phone), even when the stored content cannot be completely received and stored by one carousel method, re-broadcasting from the broadcasting station side transmitting device 1 is possible. The accumulation operation can be automatically performed again at the timing. Also, as shown in FIG. 8, the receiving device 2 recognizes the same file by confirming the event identifier (event_id) when it has been received for the first time, and does not need to receive the second time.

  Here, the configuration and operation of the content storage reservation control unit 29 will be described in more detail with reference to FIGS. 9 and 10.

  The content accumulation reservation control unit 29 includes an EIT information acquisition unit 2901, a time information processing unit 2902, an EIT information management unit 2903, an accumulation reservation control unit 2904, a corresponding file determination unit 2905, and an event identifier determination processing unit 2906. , A differential DDB determination processing unit 2907, a download ID determination processing unit 2908, a storage reservation management table generation unit 2909, and a storage content management table generation unit 2910.

  The EIT information acquisition unit 2901 extracts the EIT information of the extended EIT from the input PSI / SI information (that is, EIT program information (EIT)) and sends it to the EIT information management unit 2903.

  The time information processing unit 2902 is a program event for storing (downloading) the start time, broadcast duration, and content file of each stored content from the input PSI / SI information (ie, EIT program information (EIT)). “Event identifier” that uniquely represents the information is extracted and sent to the EIT information management unit 2903.

  The EIT information management unit 2903 has a function of generating the storage reservation management table by causing the storage reservation management table generation unit 2909 to function based on the EIT information of the extended EIT and storing it in the content storage unit 30 that stores the content file. A function for causing the corresponding file determination unit 2905 to function to determine whether there is a file that can be reserved for storage from the EIT information of the extended EIT, and a content file for which a storage reservation is made according to an instruction from the storage reservation control unit 2904 A function for marking the storage reservation management table, a function for causing the event identifier determination processing unit 2906 to function to determine an event identifier in the DII, and a function for transmitting a difference DDB determination processing unit 2907 to transmit a plurality of DDBs A function for determining and accumulating the DDB of unaccumulated difference and EITp / f And, to confirm the presence or absence of change of reservation information, and a function to update the accumulation reservation management table if there is a change.

  The storage reservation control unit 2904 has a function of instructing the EIT information management unit 2903 to control storage reservation of stored content designated by the user for the storage reservation management table presented to the user.

  The corresponding file determination unit 2905 has a function of determining whether there is a file that can be reserved for storage from the EIT information of the extended EIT.

  The event identifier determination processing unit 2906 determines the event identifier (event_id) in the download ID in the DII, and sets the content file type identified by the event identifier (event_id) as “file transmission descriptor (file_delivery_descriptor)”. In the “file type information (file_type_value)”. Further, the event identifier determination processing unit 2906 determines whether or not there is a content file having the same branch number as the event identifier (event_id) in the download ID (downloadID) and having only the data event identifier (data_event_id) updated. , An overwrite accumulation determination unit 2906a that performs accumulation when it exists.

  The difference DDB determination processing unit 2907 stores (temporarily saves) accumulated data (DDB units) without discarding, and executes DDB difference accumulation of the content file when there is an unacquired DDB. Have

  The download ID determination processing unit 2908 acquires the DII obtained from the carousel processing unit 25 for the content file to be reserved for storage, extracts the download ID (downloadID), and sends it to the event identifier determination processing unit 2906 and the differential DDB determination processing unit 2907. And a function of sending a control signal to the carousel processing unit 25 in order to control acquisition and accumulation of the DDB of the content file corresponding to the extended EIT according to an instruction from the event identifier determination processing unit 2906. Also, the download ID determination processing unit 2908 performs a carousel process on the control signal to control the acquisition and storage of unstored differential DDBs for content files transmitted by a plurality of DDBs in response to an instruction from the differential DDB determination processing unit 2907. A function of sending to the unit 25;

  The storage reservation management table generation unit 2909 has a function of generating a storage reservation management table based on the EIT information of the extended EIT under the control of the EIT information management unit 2903.

  The stored content management table generation unit 2910 has a function of generating a stored content management table for managing the stored content stored according to the storage reservation management table under the control of the EIT information management unit 2903.

  FIG. 10 is a diagram showing an operation flow of the content storage reservation control unit 29. In order to execute the storage reservation, the content storage reservation control unit 29 first receives EIT program information (in this example, the extended EIT included in the EIT) and expands the EIT information of the extended EIT decoded in the memory (step S31). Subsequently, the content storage reservation control unit 29 determines whether there is a file that can be reserved for storage by using the corresponding file determination unit 2905, and discards the information that cannot be stored (step S32). The content storage reservation control unit 29 uses the event identifier determination processing unit 2906 to grasp the channel-specific stored content of the main ch1, the original ch1, and the original ch2 for each content file that can be reserved for storage, with the service ID. The organization of the channel in the time axis direction is identified by the event identifier (event_id), and the content file type identified by the event identifier (event_id) is set to “file type information” (File_type_value) ”, the storage reservation management table generation unit 2909 generates the storage reservation management table and presents it to the user, and the corresponding file is automatically set simultaneously with the setting of the reservation by the user or the generation of the storage reservation management table. Set reservation (steps S33, S) 4).

  Subsequently, the content storage reservation control unit 29 activates the EIT information management unit 2903 several minutes before the storage reservation time based on the event identifier acquired by the time information processing unit 2902 (step S35), and sets EITp / f. The reservation information is acquired (step S36), and whether or not the reservation information has been changed is confirmed (step S37). If there is a change, the storage reservation management table is updated (step S37).

  Subsequently, the content storage reservation control unit 29 uses the overwrite storage determination unit 2906a to determine whether or not there is a stored content having the same download ID (downloadID) as the stored stored content (step S39), and the same as the stored stored content. If there is an accumulation content of download ID (downloadID), it is overwritten and accumulated (step S40). This may be a news program whose contents are updated with the same content file name.

  Subsequently, the content storage reservation control unit 29 acquires the carousel-type ES including the DII of the download ID (downloadID) associated with the event identifier (event_id) by the event identifier determination processing unit 2906 and the download ID determination processing unit 2908. (Step S41) The difference DDB determination processing unit 2907 executes the DDB accumulation until it is completed (step S42). If it is not completed, the difference DDB is acquired and accumulated (step S43). For example, as shown in FIG. 14A, the content file content type determined by the file type information is scheduled to be stored (downloaded) for the same content file among time-organized content files. In some cases, as shown in FIG. 14B, by associating the event identifier (event_id) of the EIT with the download ID (downloadID) in the carousel DII as shown in FIG. 14C, It becomes possible to specify a DDB for each event identifier (event_id) of the EIT, perform overwriting accumulation on the same file name, and receive a differential DDB.

  When the accumulation is completed (step S44), the content accumulation reservation control unit 29 deletes the corresponding file reservation control from the accumulation reservation management table, and the accumulated content management table generation unit 2910 follows the accumulation reservation management table. A stored content management table for managing the stored content is generated and stored in the content storage unit 30. The stored content management table is a table that can be presented by a user instruction.

  Therefore, the content storage reservation control unit 29 acquires the stored content of “main broadcast (first broadcast)” transmitted by the carousel transmission method when executing the storage reservation of the stored content specified by the user, The operation of the storage reservation can be controlled by acquiring the stored content of “rebroadcast (the second and subsequent broadcasts)” transmitted by the carousel transmission method.

  The user can specify reading of the stored content management table stored in the content storage unit 30, and the stored content stored in the content storage unit 30 is played back by the stored content list display / playback instruction unit 31 shown in FIG. Control is made and it can be presented to the user.

  In this way, the receiving device 2 can acquire information necessary for storage reservation of stored content (including reserved recording in the case of video or the like) from the extended EIT. “File transmission descriptor (file_delivery_descriptor)” is added to the extended EIT, and the file type is immediately identified by the “file type information (file_type_value)” in the “file transmission descriptor (file_delivery_descriptor)”, and the stored content is stored. The storage reservation management table for reservation can be created immediately, and the stored content can be acquired immediately. For this reason, it is possible to reduce the burden of reception processing of the receiving device 2 and reduce the risk of reception failure, and acquire only the DDB that has not been acquired due to reception failure and complete the reception of the content file.

  For example, when the moving image file of the original channel (ch1) shown in FIG. 15A is divided into a plurality of data blocks (DDB) and transmitted as shown in FIG. 15B, the block number (blocknumber) is The given DDB is transmitted by the carousel method as shown in FIG. At this time, in the current operation of digital broadcasting, the download ID (downloadID) defines the data event identifier (data_event_id) in 28 bits to 31 bits, but all other bits are filled with 1 and are not used. Therefore, as an example, as shown in FIG. 16, it is possible to link the download ID (downloadID) and the event identifier (event_id) by embedding the event identifier (event_id) from the 0th bit to the 15th bit. As a result, for each event identifier (event_id), a module can be uniquely identified by a download ID (downloadID) + block number (blocknumber), and differential reception is possible. In addition, it is possible to determine whether the file is to be overwritten or a new file by using the data event identifier (data_event_id) as the branch number of the event identifier (event_id) from the 16th bit to the 27th bit. Become. It is also possible to uniquely manage a module by download ID (downloadID) + moduleID in moduleID units for each module.

  In mobile reception where the reception environment is unstable, it is more likely that a file with a small file size can be received in a short time than a file with a large file size distributed over a long period of time. Therefore, it is more efficient to distribute a news program or the like by dividing the program for each news item.

  That is, since the file to be distributed is uniquely specified using the event identifier (event_id) of the EIT information on the composition time axis and the download ID (downloadID) of DII in which the event identifier (event_id) is embedded, the item news In the case of a file with a small file size and a short delivery time, a large amount of EIT information on the composition time axis is required, and the amount of EIT information increases. Therefore, by setting the “branch number” of the event identifier (event_id) from the 16th bit to the 27th bit of the download ID (downloadID), the event identifier (event_id) specifies a large item such as a news program and uses the branch number. By specifying individual news items, it is possible to distribute detailed files without increasing the amount of EIT information. For example, as shown in FIG. 17A, when the branch number is not considered, the event identifier (event_id) and the carousel have a one-to-one relationship, so the information amount of the EIT increases, but as shown in FIG. When the branch number is taken into consideration, since a plurality of carousels can be handled for the event identifier (event_id), the information amount of the EIT does not increase.

  Furthermore, as shown in FIG. 18, in the receiving device 2 that always receives the latest information such as traffic information, such as the in-vehicle receiving device, the update information of the file that is stored (downloaded) is always monitored, and the information When is updated, it is necessary to update and overwrite the information by storing and receiving. Therefore, by using 4 bits of the data event identifier (data_event_id) embedded in the download ID (downloadID) of the DII as the update information, the receiving apparatus can monitor the file update. Further, by looking at the event identifier (event_id) and branch number embedded in the download ID (downloadID), it is possible to determine whether the file should be overwritten or updated.

  As described above, according to the present invention, the receiving device 2 acquires the information on the pre-EIT for use in the storage reservation, the time information actually stored (downloaded) broadcast described in the EIT, Since the file information and event identifier are identified from the “file transmission descriptor” and it is determined whether or not the file to be stored (downloaded) is supported based on the information, the storage reservation is performed. Without receiving the entire broadcast signal including arbitrary files that are actually stored (downloaded) from information, files that can be handled by the receiving device are stored from the “file transmission descriptor” in the broadcast schedule described in the EIT. It is possible to grasp in advance whether or not (downloading) is to be performed, and it is possible to reserve an efficient storage (download) broadcast.

  In addition, the broadcasting station-side transmitting device 1 broadcasts an expanded EIT by adding a “file transmission descriptor” to an existing EIT, and stores an arbitrary file of stored (download) broadcasting associated with the expanded EIT. By broadcasting a plurality of times in the carousel system, the receiving device can repeatedly receive, for example, even in an unstable mobile reception environment, and can reliably receive an arbitrary file.

  Also, the broadcasting station-side transmission device 1 can distribute the distribution of the arbitrary file associated with the expanded EIT by the data carousel method according to the DSM-CC standard of MPEG-2. More specifically, by using the download ID (downloadID) in the DII message constituting the data carousel extended from the current digital broadcast operation, the receiving device 2 can be used for the current digital broadcast operation. It becomes possible to expand and configure relatively easily in a conforming manner, and an arbitrary file to be distributed by the data carousel can be uniquely specified. As a result, the receiving device 2 temporarily stores individual DDBs, which are distribution block units of data distributed by the carousel method, in a temporary memory or the like, so that some DDBs cannot be received in the first distribution. Even in this case, it is possible to connect or update an arbitrary file to complete by receiving the differential DDB.

  At that time, the event identifier (event_id) is embedded in the download ID (downloadID) that uniquely identifies the carousel, thereby associating the event identifier (event_id) with the download ID (downloadID) of the DII message. Even when the same file is distributed with the same event identifier (event_id) a plurality of times on the axis, it is possible for the receiving device 2 to determine whether the file has already been received.

  In addition, since all DDBs in a data carousel have a unique block number (blocknumber) in the data carousel, a unique DDB can be managed by a receiving device for each event identifier (event_id). Even if the reception state is unstable, it is possible to efficiently store (download) files by acquiring only the differential DDB in the repeatedly transmitted data carousel.

  In particular, when the broadcasting station side transmitting device 1 always stores (downloads) broadcasts the same type of files such as traffic information, it can be understood that the content files to be stored (downloaded) on the receiving device side are of the same type. The file type information (file_type_value) is included in the “file transmission descriptor” and distributed as information that matches the event identifier (event_id) of EIT and the download ID. It is possible to extend the file comparatively easily and efficiently to overwrite and update an arbitrary file.

  Therefore, comprehensively, in the broadcasting station side transmitting apparatus 1, the program schedule table (extended EIT or equivalent) includes a service ID that uniquely specifies a service for broadcasting each content file, a start time, and a broadcast duration. And an event identifier that uniquely represents a program event in which the content file is stored (downloaded) and a file transmission descriptor, the file transmission descriptor including file type information for identifying the contents of the content file, A program schedule table for transmitting a program schedule table (extended EIT or equivalent) at a predetermined interval is transmitted, and a content file having an event identifier associated with file type information in the program schedule table (extended EIT or equivalent) is data Carousel in the block In configured to transmit.

  Also, comprehensively, the receiving device 2 can receive a program schedule table (extended EIT or equivalent thereof) and reserve storage of the associated content associated with the program schedule table (extended EIT or equivalent thereof). A time-axis organization in a simple content file is identified by an event identifier, and the content file content type identified by the event identifier is identified by file type information, and a storage reservation management table for making a storage reservation is generated At the same time, the storage content defined to be reserved for storage is controlled to start the storage reservation at a predetermined start time, and the storage of the storage content reserved for storage at the start time is executed in units of carousel data blocks. The

  In the broadcasting station-side transmitting device 1, the program schedule table (extended EIT or equivalent) is configured by adding a file transmission descriptor to the EIT, so that a change burden from the current EPG system is almost generated. Is feasible.

  Further, in the broadcasting station-side transmission device 1, the event identifier is associated with a branch number that represents a further subdivided content of the content file identified by the file type information. In DII, it can be added in association with the download ID. On the receiving device 2 side, the content file content type determined by the file type information is stored in the same content file among time-organized content files ( If download is scheduled to be broadcast, the content file according to the branch number can be overwritten and accumulated.

  Further, in the broadcasting station side transmitting apparatus 1, the event identifier is added in association with the download ID in the carousel type DII, and on the receiving apparatus 2 side, the DDB of the stored content file in the carousel type is stored. Until completion of the storage, a difference DDB representing an unacquired DDB can be acquired and stored within a predetermined number of broadcasts of the carousel method.

  Furthermore, as one aspect of the present invention, the content storage reservation control unit can be configured as a computer. A program for causing a computer to realize the above-described content storage reservation control unit is stored in a storage unit (memory) provided inside or outside the computer. Such a storage unit can be realized by an external storage device such as an external hard disk or an internal storage device such as ROM or RAM. The control unit provided in the computer can be realized by controlling a central processing unit (CPU) or the like. In other words, the CPU can appropriately read from the storage unit a program in which the processing content for realizing the function of each component is described, and realize the function of each component on the computer. Here, the function of each component may be realized by a part of hardware.

  In addition, the program describing the processing contents can be distributed by selling, transferring, or lending a portable recording medium such as a DVD or CD-ROM, and such a program can be distributed on a server on a network, for example. Can be distributed by transferring the program from the server to another computer via the network.

  In addition, a computer that executes such a program can temporarily store, for example, a program recorded on a portable recording medium or a program transferred from a server in its own storage unit. As another embodiment of the program, the computer may directly read the program from a portable recording medium and execute processing according to the program, and each time the program is transferred from the server to the computer. In addition, the processing according to the received program may be executed sequentially.

  According to the present invention, a mechanism is provided for automatically performing the accumulation operation again even when the reception device side is in an environment where the reception condition is unstable (for example, when the user gets on a subway). Therefore, it is particularly useful for obtaining stored contents of digital broadcasting that is reserved for storage in a program guide.

DESCRIPTION OF SYMBOLS 1 Broadcasting station side transmission apparatus 2 Reception apparatus 10 Content organization part 11 Carousel processing part 12 PSI / SI production | generation encoding part 13 Multiplexing part 14 OFDM modulation part 15 Transmission part 20 OFDM demodulation part 21 TS decoding part 22 Audio | voice decoding part 23 Image | video Decoding unit 24 Subtitle / subtitle super decoding unit 25 Carousel processing unit 26 BML browser 27 Presentation processing unit 28 SI processing unit 29 Content storage reservation control unit 30 Content storage unit 31 Stored content list display / playback instruction unit 32 User I / F unit 101 Content generation unit 102 Control data generation unit 103 EIT generation unit 1021 Identifier numbering control unit 1022 Transmission frequency / cycle management unit 1031 File transmission descriptor generation unit 2901 EIT information acquisition unit 2902 Time information processing unit 2903 EIT information management unit 2904 Storage reservation Control unit 2905 Corresponding file determination unit 2906 Event identifier determination processing unit 2906a Overwrite accumulation determination unit 2907 Difference DDB determination processing unit 2908 Download ID determination processing unit 2909 Storage reservation management table generation unit 2910 Storage content management table generation unit

Claims (7)

A receiving device for receiving a program schedule table required to reserve storage of the plurality of contents on the receiving side when receiving a content file by a broadcast wave of digital broadcasting,
The program schedule table includes a service ID that uniquely specifies a service that broadcasts each content file, an event identifier that uniquely indicates a start time, a broadcast duration, and a program event that downloads the content file, a file transmission descriptor, The file transmission descriptor includes file type information for identifying the contents of the content file,
The program schedule table is received, and the content associated in the program schedule table is identified by the event identifier for the organization in the time axis direction in the content file that can be reserved for storage, and the content file identified by the event identifier A storage reservation management table generating means for identifying a content type by the file type information and generating a storage reservation management table for reservation for storage;
Content storage reservation control means for controlling the start of storage reservation at the start time for the content specified to be stored in the storage reservation management table;
Content accumulation execution means for executing accumulation of content reserved for accumulation at the start time in units of carousel data blocks;
A receiving apparatus comprising:   The receiving apparatus according to claim 1, wherein the program schedule table is configured by adding a file transmission descriptor to EIT.   3. The storage reservation management table generating unit includes a corresponding file determining unit that receives the program schedule table, determines whether there is a content file that can be reserved for storage, and discards information that cannot be stored. The receiving device described in 1. The event identifier is added in association with the download ID in the carousel DII.
The content storage execution means stores a difference DDB representing an unacquired DDB within a predetermined number of broadcasts of the carousel method until the DDB storage of the stored content file of the carousel method is completed. The receiving device according to claim 3, further comprising means for acquiring and accumulating. The event identifier is added in association with the download ID in the carousel DII.
When the content file content type determined by the file type information is such that a download broadcast of the same content file is scheduled among the time-organized content files, the content storage execution means 5. The receiving apparatus according to claim 4, further comprising means for performing overwriting accumulation of a content file according to the above. The event identifier is associated with a branch number representing a further subdivided content of the content file identified by the file type information, and the branch number is added in association with the download ID in the carousel DII. And
When the content file content type determined by the file type information is such that a download broadcast of the same content file is scheduled among the time-organized content files, the content storage execution means The receiving device according to claim 5, further comprising means for performing overwriting accumulation of a content file according to the above. When receiving a content file on a digital broadcast wave, a computer configured as a receiving device that receives a program schedule table required to reserve and store the plurality of contents on the receiving side;
The program schedule table includes a service ID that uniquely specifies a service that broadcasts each content file, an event identifier that uniquely indicates a start time, a broadcast duration, and a program event that downloads the content file, a file transmission descriptor, The file transmission descriptor includes file type information for identifying the contents of the content file,
Receiving a program schedule table, identifying the content associated in the program schedule table with the event identifier for organization in the time axis direction in the content file that can be reserved for storage, and the content of the content file identified by the event identifier Identifying the file type by the file type information and generating a storage reservation management table for reservation for storage;
Controlling the start of storage reservation at the start time for the content specified to be stored in the storage reservation management table;
Executing accumulation of contents reserved for accumulation at the start time in units of data blocks in a carousel method;
A program for running

Images