JP5797957B2 - Broadcast service receiving apparatus and program - Google Patents

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 and program for storing and distributing arbitrary files.

  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 a system that stores broadcast content by managing the broadcast date and time based on the content table on the receiving device side, on the transmission side, data and content related to the broadcast content are converted to TS, and the generated TS is digitally converted. Transmit by broadcast wave. 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, a technique for distributing an arbitrary file from a broadcasting station by storage distribution and acquiring it by a receiving device is described as “unique data broadcasting” in ARIB STD-B24, and is a TR that is an operation rule for terrestrial digital audio broadcasting. -It is defined as E profile of B13.

  In the current technology, when a plurality of contents are collectively stored in one storage (download) program (broadcast frame), the content descriptor in the program arrangement information used for digital broadcasting in the ARIB STD-B10 is the conventional EIT. Does not assume that a plurality of contents are broadcast in one broadcast frame, and the genre designation by the content descriptor is only for the broadcast frame.

For example, in advanced broadband satellite digital broadcasting (hereinafter referred to as advanced BS), metadata is proposed to collectively store a plurality of contents in one stored program.
(Before content storage) Information related to a plurality of contents (content identification information, genre, etc.) is described and transmitted in “accumulation (download) information” for this broadcast frame, so genre information is acquired in advance.
(At the time of content storage) Based on the information acquired in advance, the header information of each content is acquired and stored.

  On the other hand, in the multimedia broadcasting for mobile terminals (V-LOW band), the broadcast wave band is narrower than the advanced BS. Therefore, it is not possible to send a large amount of metadata. Thus, using SI, a plurality of contents are collectively stored in one stored program.

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

  However, in the conventional EPG, since there is no information regarding the storage (download) file according to the type of content in the broadcast SI information, an EPG for storing the storage file according to the type of content cannot be realized.

  Also, in the E-profile of terrestrial digital audio broadcasting, it is grasped what kind of file has been distributed until the entire broadcasting signal including the arbitrary file to be actually stored is received, decoded and expanded in the memory on the receiving device side. This is inefficient in terms of the processing cost of the receiving apparatus and the received power.

  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. (Referred to as “stored content”).

  In particular, assuming that traffic information is transmitted in a broadcasting service, it is necessary to constantly distribute new information, and the receiver side also makes effective use of a limited memory capacity, for example, the same type of content file that is stored and broadcast Therefore, it is necessary to construct a broadcasting system that can be overwritten (always updated).

  Further, in the program schedule system using the current EPG, the user of the receiving apparatus performs an overwrite update operation accompanying reservation accumulation on the receiving apparatus side according to the type of stored content such as single-shot content or series content. It is extremely inconvenient to judge and set sequentially.

  Accordingly, an object of the present invention is to provide a receiving apparatus and a program for a broadcast service that stores (downloads) and distributes arbitrary files including content files.

  In the present invention, a “file transmission descriptor” (file_delivery_descriptor), which is a new descriptor in the EIT, is added to the broadcast SI information constituting the EPG as a specific example on the transmission device side, thereby providing an “extended EIT”. Information necessary for configuring and transmitting (to be described later) and content-oriented storage reservation (including reservation recording in the case of video, etc.) that enables creation of a content table for storage reservation of stored content It is assumed that an incorporated content schedule table (CST: a table composed of Content_Schedule_Section described later) is configured and transmitted.

  On the other hand, when using the extended EIT on the receiving device side, any content file for stored broadcasting (hereinafter, also collectively referred to as “arbitrary file”) included in this “file transmission descriptor” is identified, and any It is possible to immediately grasp whether the content file has been distributed, and to update the same type of content file as necessary.

  Also, when using CST on the receiving device side, the CST is assigned to each stored content and “broadcast time identification information” indicating the start time, broadcast duration, and number of times of broadcast of each stored content. Since it includes a unique identifier (event_id) and a descriptor representing the description content of each stored content, this CST is received, and a content table for reserving and storing the stored content associated with the CST is generated. Then, the storage content defined to be reserved in the content table can be executed in units of data blocks that are transmitted in the carousel method at the start time.

  What is important here is that the “extended EIT” and “CST” to be transmitted on the transmitting device side predetermine the type of stored content as a new descriptor or identifier considering the storage reservation operation on the receiving device side. “Content type information (content_type) is embedded. This content type information (content_type) includes“ single content ”,“ series content ”,“ overwrite update (always updated) content ”, and“ multi-item content ”. Is defined at least. Further, on the receiving apparatus side, the storage reservation corresponding to the type of stored content is made possible by combining the extended EIT or CST and the DII information.

  “Single content” is a single stored content.

  “Series content” is stored content constituting a series program.

  “Overwrite update (always update) content” is, for example, stored content that is overwritten (always updated). This is content that changes only the content information, such as weather information and road traffic information, and is stored content for use that only stores the latest stored content.

  “Multiple item content” refers to, for example, a plurality of stored contents sent in a certain broadcast frame. For example, when a plurality of news items are sent depending on the situation in a broadcast frame of a program “National News 12:00”, “News Item 1” is transmitted in the first carousel when transmitting three stored contents with the same event_id. The second carousel transmits “news item 2”, the third carousel transmits “news item 3”, the fourth carousel transmits “news item 1”, and the fifth carousel transmits “news item 2”. Can be transmitted. “Multi-item content” is transmitted in different carousels, for example, within the broadcast time described in the CST.

  The “replacement function” refers to a function in which, for example, a broadcast station modifies stored content after broadcasting and broadcasts it again to replace it with stored content that has already been stored.

In the present invention, the following functions are realized in accumulating broadcast waves using carousel transmission in a mobile reception environment.
(1) Execution of single-shot content, series content, overwrite update content, and multi-item content (2) Execution of replacement of stored content (3) Prevention of duplicate storage of the same stored content (4) There is a new broadcast frame Preventing duplicate storage when there is no news and broadcast the same stored content as before (5) If CST, hold all repeated broadcast times for each stored content (6) Store operation during broadcast time is data carousel Accordingly, it is required to repeatedly broadcast the same stored content because the reception environment is poor in the storage of broadcast waves in a mobile reception environment. In addition, in order to reduce power consumption since the mobile terminal is a target, it is required not to receive repeated broadcasts of stored content that has been successfully stored, or to constantly monitor the stream of the storage (download) channel.
(8) The following functions are realized in accumulating broadcast waves using carousel transmission under a mobile reception environment.

  According to the present invention, it is not necessary to constantly monitor the stored content that is repeatedly broadcast, and conventionally, the above eight functions cannot be realized for the stored content that is repeatedly broadcast. In a mobile reception environment, it is possible to suppress the power consumption of the receiving device and to accumulate broadcast waves.

That is, the receiving apparatus according to the present invention is a receiving apparatus that receives a program schedule table required to reserve storage of a plurality of stored 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 specifies a service that broadcasts each content file, an event identifier that uniquely indicates a start time, a broadcast duration, and a content file, and content type information that indicates a content type. wherein the door, the header information of the de Taburokku, the event identifier and downloaded ID is described, to receive the program schedule table, the accumulation reservation for the accumulation reservation content file identified by the event identifier Management table, content type information A storage reservation management table generating means for generating the storage reservation, a content storage reservation control means for controlling the start of the storage reservation at the start time, the storage content defined to be reserved for storage in the storage reservation management table, Content storage execution means for executing storage of storage content reserved for storage at a start time in units of carousel data blocks according to a combination of the download ID and the content type information.

  In the receiving apparatus according to the present invention, the program schedule table is configured by adding a file transmission descriptor to the EIT.

  In the receiving apparatus according to the present invention, the program schedule table includes broadcast time information of each stored content for each number of repetitions of the carousel method.

Further, in the receiving apparatus according to the present invention, the content storage execution unit determines whether to “single content”, “series content”, “overwrite update content”, “multiple item content” from the combination of the download ID and the content type information. It has a means to perform accumulation control according to the content type of.

  In the receiving apparatus according to the present invention, the program schedule table includes a “series descriptor” for identifying content information of a series program, and the event identifier is a DII that is the header information of the carousel system. The download ID includes a “branch number” of the event identifier and a “data event identifier”, and includes the “single content”, the “series content”, and the “overwrite”. The storage method in each content type of “update content” and “multiple item content” is based on the event identifier, the content type information defined in the program schedule table and the “series descriptor”, Before being transmitted by DII which is header information It is defined on the transmission side by “branch number” and “data event identifier”, and the content storage execution means uses the event identifier as a reference, the content type information and the “series descriptor”, and the header It has a means for discriminating and executing accumulation control according to the content type based on the “branch number” and the “data event identifier” transmitted in the information DII.

  Further, in the receiving apparatus according to the present invention, the header information includes latitude / longitude information for each stored content with respect to the “overwrite update content”, and the content storage execution means is for each stored content with respect to the “overwrite update content”. When executing the storage, the apparatus includes a means for extracting latitude / longitude information from the header information and storing stored content corresponding to the latitude / longitude information.

  In the receiving device according to the present invention, the header information includes genre information of a plurality of item contents, and the content accumulation executing unit executes accumulation control as accumulation contents for each genre information for the accumulation of the plurality of item contents. It has the means to do.

  Also, in the receiving apparatus according to the present invention, the header information includes information on the number of stored contents constituting a plurality of item contents, and the content storage execution unit is configured to store the number of stored contents for the storage of the plurality of item contents. It has a means to perform accumulation control based on this.

  Further, in the receiving apparatus according to the present invention, the program schedule table includes an update information descriptor or an identifier indicating that the version of the resent content is changed, and the content storage execution means includes the update information descriptor or the identifier And means for acquiring the version information of the retransmitted content specified in the header information and storing the retransmitted content.

  Further, in the receiving apparatus according to the present invention, the program schedule table includes broadcast time information for each stored content, and the content storage execution means executes the program schedule in advance before executing the storage of the stored content. It has means for acquiring tables CST [p] and CST [f] each comprising only the part related to the stored content to be broadcasted next and in the table, and determining whether or not the stored content to be stored has changed. Features.

  Further, in the receiving apparatus according to the present invention, the program schedule table includes broadcast time information for each stored content, and the content storage execution means executes the program schedule in advance before executing the storage of the stored content. Tables CST [p] and CST [f], each of which is composed of only the portion related to the broadcast time of one or two times of the stored content to be broadcasted now and next in the table, are acquired, and the stored content to be stored is changed. It has a means for discriminating the presence or absence.

In addition, the program according to the present invention is a reception device that receives a program schedule table required to reserve storage of a plurality of stored contents on the receiving side when receiving a content file on 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, an event identifier that uniquely represents the content file, and content type information that represents the content type. wherein, the header information of the de Taburokku, wherein is described an event identifier and downloaded ID, the receiving program schedule table in the computer constituting the storage controller in the receiver device, is identified by the event identifier Store content files A step of generating a storage reservation management table for reservation by adding content type information, and controlling the start of storage reservation of the stored content defined to be stored in the storage reservation management table at the start time And a step of executing storage of storage contents reserved for storage at the start time in units of carousel data blocks according to a combination of the download ID and the content type information. .

  According to the present invention, the transmitting device can store and broadcast an arbitrary file that can be identified by the extended EIT or CST on the receiving device side. The receiving device can realize the storage reservation function, and the receiving device can efficiently power. Only an arbitrary file identified by the extended EIT or CST can be received at a minimum, and a storage operation corresponding to the content type can be performed.

It is a schematic block diagram of the broadcasting system of one Example by this invention. It is the schematic of extended EIT which concerns on this invention. It is the schematic of CST which concerns on this invention. It is the schematic of the broadcasting station side transmission apparatus of one Example by 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 shows the example of transmission by a carousel system. It is a figure which shows the example of EPG which concerns on the broadcasting system of one Example by this invention. It is the schematic of the content storage reservation control part in the receiver of one Example which concerns on this invention. It is an operation | movement flowchart of the content storage reservation control part in the receiver of one Example which concerns on this invention. (A), (B), (C) is a figure which shows the relationship between CST or extended EIT in the broadcasting system of one Example by this invention, and DII of a carousel system. It is a figure which shows the example of the storage reservation management table | surface in the receiver of one Example which concerns on this invention. It is a figure which shows the example of the stored content management table in the receiver of one Example which concerns on this invention. It is a comparison figure explaining a receiving apparatus request | requirement and a broadcasting station side transmitting apparatus request | requirement. It is a figure which illustrates transmission and accumulation | storage of the single content in the broadcasting system of one Example by this invention. It is a figure which illustrates transmission and accumulation | storage of the series content in the broadcasting system of one Example by this invention. It is a figure which illustrates transmission and accumulation | storage of the multi-item content in the broadcasting system of one Example by this invention. It is a figure which illustrates transmission and accumulation | storage of the overwrite update content in the broadcasting system of one Example by this invention. (A), (b) is a figure which illustrates transmission and accumulation | storage of the single content in the broadcasting system of one Example by this invention. (A), (b) is a figure which illustrates transmission and accumulation | storage of the series content in the broadcasting system of one Example by this invention. (A), (b) is a figure which illustrates transmission and accumulation | storage of the multi-item content in the broadcasting system of one Example by this invention. (A), (b) is a figure which illustrates transmission and accumulation | storage of the overwrite update content in the broadcasting system of one Example by this invention. (A), (b) is a figure which illustrates the replacement function in the broadcasting system of one Example by this invention. It is a figure which illustrates the structure which makes event_id the same in all the broadcast frames in the broadcasting system of one Example by this invention. (A), (b) is a figure which illustrates sending and accumulation | storage of the positional information in the broadcasting system of one Example by this invention. It is a figure which illustrates utilization of the positional information in the broadcasting system of one Example by this invention. It is a figure which shows the 1st example of CST [p / f] in the broadcasting system of one Example by this invention. It is a figure which shows the 2nd example of CST [p / f] in the broadcasting system of one Example by this invention. It is a figure which shows the 3rd example of CST [p / f] in the broadcasting system of one Example by this invention. It is the schematic of another example of the extended EIT which concerns on this invention. It is the schematic of another example of CST which concerns on this invention.

  Hereinafter, an embodiment of a broadcasting system of a broadcasting service for storing and distributing / receiving arbitrary files 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 “file transmission descriptor” which is a new descriptor is added to the EIT, and the “extended EIT” is configured and transmitted, or a content table for storage reservation of stored content is created. A content schedule table (CST: Content_Schedule_Section described later) that incorporates information necessary for content-oriented storage reservation (including reservation recording in the case of video, etc.) A device for transmitting that table) configured to a.

  The receiving device 2 grasps what kind of content file is distributed and how to make a storage reservation by the combination of “extended EIT” or “CST” and DII, and manages the storage reservation of the content file. The “storage reservation management table” for generating the content file and the “storage content management table” for managing the presence / absence of storage of the content file are generated, and the storage of the stored content to be distributed is specified by the user or based on automatic setting It is a device to manage.

[Extended EIT]
As shown in FIG. 2, the “extended EIT” is configured by adding a “file transmission descriptor”, which is a new descriptor, in the existing EIT. Hereinafter, each data in the file transmission descriptor will be described.

  “Descriptor_tag (8 bits)” specifies an organization that uses the file transmission descriptor set by the standardization organization.

  “Descriptor_length (8 bits)” describes the descriptor length of the file transmission descriptor.

  “File_type_value (16 bits)” describes the type of file to be transmitted.

  “Content_type_value1 (8bti)” describes the type of stored content to be transmitted.

  “Content_type_value2 (4 bits)” describes the type of update of stored content to be transmitted.

  “Content_type_value3 (4 bits)” describes the main content / supplement type of the stored content to be transmitted.

  “Content_volume (16 bit)” describes the capacity of stored content. If the stored content capacity is unknown, “0xFFFF” is described.

  “Content_bit_rate (16 bit)” describes an approximate reproduction rate of stored content. If the stored content playback rate is variable or unknown, “0xFFFF” is described.

  “Transmission_bit_rate (16 bit)” describes an approximate transmission rate of stored content. If the transmission rate of stored content is variable or unknown, “0xFFFF” is described.

  “Ex_event_id (12 bits)” describes the item identification value of the stored content. If the stored content item identification value is not used, “0xFFF” is described.

  “Data_event_id (4 bits)” describes the version value of the stored content. When the stored content version is not used, “0xF” is described.

  “Reserved_future_use (8 bits)” describes arbitrary information other than the above.

  The descriptors used in EIT include the short format event descriptors, content descriptors, digital copy control descriptors, audio component descriptors, data content descriptors, staff descriptors used in real-time services, A transmission descriptor and a series descriptor for identifying a series program are used.

  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.

[Content schedule table (CST)]
As illustrated in FIG. 3, “CST” represents a “table identifier” representing the type of CST, “transmission identification information” representing the transmission identification information of CST, and a unique identifier assigned to each stored content. "Event identifier (event_id)", "content type information (content_type)" representing the content type, "broadcast time identification information" representing the start time, broadcast duration, and number of broadcasts of each stored content, It consists of “various descriptors” that represent the description of each stored content. In addition, the content schedule table (CST) includes a plurality of stored contents included in one CST, a predetermined number of “broadcast time information” and various descriptors that are the same as those used in the EIT. “Digital Control Descriptor” indicating that copying is restricted, “Short Event Descriptor” indicating the title of stored content, “Content Descriptor” indicating program content, “Genre and Series” indicating “program” Series descriptor "is described. The content type information (content_type) can be a descriptor in “content information” shown in FIG. The “transmission identification information” can be arbitrarily determined in each service mode, and an example thereof is shown below.

  “Table_id (8bit)” is a value used for identifying the table to which the section belongs, the stored content stream (own stream or other stream) transmitted by the carousel transmission method, and within 1 hour, 6 hours Within 12 hours, within 1 day, within 1 day, and table identifiers categorized by combinations of stored contents of broadcasting hours after 1 day. Note that for () means that it is repeatedly described for a predetermined number of times.

  “Section_syntax_indicator (1 bit)” has two types of section formats, a normal format and an extended format, and is a value for identifying the type. The normal format is 0, and the extended format is 1, which is fixed to “1” in this example, and is one piece of transmission identification information.

  “Reserved_future_use (1 bit)”, when used in a term defining an encoded bit stream, indicates that the value can be used as an extension defined in the predetermined bit (B10) in the future, for example. In this example, it is undefined (all bits are 1). That is, it is one piece of transmission identification information indicating an extension. Separately, “reserved” can be provided, and when used in defining an encoded bit stream, it indicates that the value can be used as an extension defined in the future ISO. In this example, it is undefined (all bits are 1).

  “Section_length (12 bits)” describes the number of bytes of the section from immediately after the section length field to the end of the section including CRC (Cyclic Redundancy Check). That is, it is one piece of transmission identification information indicating the length of CST.

  “Service_id (16 bit)” is a value for identifying this service from other services in the transport stream. That is, it is one piece of transmission identification information describing a channel (service ID) of stored content in CST.

  “Version_number (5 bits)” is one piece of transmission identification information describing the version number of the sub-table. The sub-table indicates that table_id, service_id, transport_stream_id, and version_number are the same section.

  “Current_next_indicator (1 bit)” is “1” when the sub-table is currently available, and “0” when the sub-table is currently unavailable and indicates that it will be valid next. This is one piece of transmission identification information describing a number.

  “Section_number (8 bits)” represents a section number. The first section number in the subtable is 0x00. The section number is incremented by 1 every time a section having the same table_id, service_id, transport_stream_id, and original_network_id is added. That is, it is one piece of transmission identification information that describes the current section number in the CST.

  “Last_section_number (8 bits)” describes the number of the last section of the sub-table to which the section belongs. That is, it is one piece of transmission identification information indicating all section numbers in the CST.

  “Transport_stream_id (16 bits)” is a value for identifying this transport stream indicated by CST from other multiplexes in the distribution system, as in EIT. That is, it is one piece of transmission identification information that describes the TSID for transmitting the CST.

  “Original_network_id (16 bit)” is one piece of transmission identification information describing the network identification of the original distribution system.

  “Segment_last_section_number (8 bits)” can also divide the sub-table into a plurality of segments according to the number of contents, broadcast start time, etc., and describe the number of the last section in the segment to which this section belongs. This is one piece of transmission identification information indicating the last segment section number for transmitting the CST. A section obtained by dividing a sub-table by a certain unit is defined as a section. For example, when 200 stored contents are divided into 10 stored contents, the number of segments is 20. It should be noted that “Last_table_id” may be provided to indicate the final table identification being used. When only one table is used, the table identification of this table is set in this field.

  “Event_id (16 bits)” describes a unique identifier assigned to each stored content.

  file_type_value, content_type_value1, content_type_value2, and content_type_value3 are the same as the data described in the file transmission descriptor described above.

  “Broadcast_count (8 bits)” describes the number of broadcasts of the stored content.

  “Start_time (40 bits)” describes the broadcast start time of stored content for each event_id.

  “Duration (24 bits)” describes the duration of stored content for each event_id.

  “Running_status (3bit)” is undefined and describes “0”.

  “Free_CA_mode (1 bit)” is set to “0” when the program is a free program, and is set to “1” when the program is a pay program.

  “Descriptor_loop_length (12 bits)” describes the length of the subsequent descriptor. As the various descriptors, the descriptors of the operated EIT can be adopted as they are.

  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 content file to be accumulated, and when the same file is repeatedly distributed for a certain time, for example, 24 hours or one week, the same event identifier ( event_id) is used repeatedly. 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.

  Similar to EIT, short format event descriptors, content descriptors, digital copy control descriptors, audio component descriptors, data content descriptors, staff descriptors, and series descriptors are used as descriptors used in CST.

  CST includes event_id, file_type_value, and content_type_value, and describes the transmission time including the re-transmission of content. In the EIT, one piece of transmission time information (start_time, duration) is described for one event_id, whereas in the CST, a plurality of pieces of transmission time information are described for one event_id. As a result, regarding the content to be retransmitted, the amount of information to be transmitted can be reduced as compared with the EIT, and the receiver can acquire schedule information for content accumulation including retransmission. Note that the ex_event_id value and the data_event_id value that are most likely to be changed to the most recent transmission are not described in the CST.

  Table 1 shows examples of file_type_value values transmitted by extended EIT and CST, 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.

  FIG. 4 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 a stored content to be distributed on a broadcast wave, and creates a program schedule serving as basic data for making a storage reservation on the receiving side associated with the “extended EIT” or “CST”. Configured to generate. “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. On the other hand, since “CST” transmits content-oriented program information, it is possible to easily configure a program schedule serving as basic data for making a storage reservation on the receiving side. In addition, the CST can reduce the table size compared to the EIT, and can greatly reduce the burden of receiving or updating information related to stored content.

  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 stored data 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 download ID (downloadID) and “extended EIT” or “CST” in the DII message. An identifier numbering control unit 1021 that controls transmission in a manner associated with an event identifier (event_id) associated with the event identifier (event_id), and a data block (DDB) that is transmitted in a carousel method for each event identified by the event identifier (event_id) And a transmission frequency / cycle management unit 1022 that manages the transmission cycle of the carousel method. 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. Further, the control data generating unit 102 combines “content type information (content_type)” representing a content type, “event identifier (event_id)”, and “series descriptor (series_id)” as content information, “Extended EIT” or “CST” is organized to enable reservation accumulation control for each type, and at least information of “event identifier (event_id)”, its “branch number” and “data component identifier (data_component_id) are stored in DII. ) ”.

  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 configured and sent to the PSI / SI generation encoding unit 12 as EIT program information. 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 EIT generation unit 103 is configured to incorporate the event identifier (event_id) obtained from the identifier numbering control unit 1021 into “CST” used to store the stored content for distribution on the broadcast wave on the receiving device side. Then, it can be configured to be sent to the PSI / SI generation encoding unit 12 as EIT program information. Even when “CST” is transmitted, “file type information (file_type_value)” indicating the content type of the content file can be generated and incorporated.

  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. 7, in a channel (Ch) representing a service ID for content distribution, content data is multiplexed so as to be identified by component tags (component_tag: ESm to ESn), and the content data is expanded. For a plurality of stored contents associated by EIT or CST, the download data block (DDB) is switched for each stored content identified by the event identifier (event_id) using the DII / DDB information extracted from the selected broadcast stream. Can be obtained. 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) necessary for receiving a broadcast wave by the receiving device 2, and sends the PSI / SI information to the multiplexing unit 13. This EIT program information is configured as PSI / SI information including an extended EIT, a start time at the time of broadcasting each stored content, a broadcast duration, and an “event identifier” that uniquely represents the content file.

  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.

  In this way, the broadcasting station-side transmission device 1 transmits the extended EIT at a constant frequency, and transmits the stored content by the carousel transmission method based on the extended EIT or CST. As will be described in detail later, the broadcasting station-side transmitting device 1 re-broadcasts in accordance with the extended EIT or CST in a data block in which each stored content is associated with an event identifier (event_id) associated with a download ID (downloadID). The receiving apparatus 2 can know the number and period of rebroadcast from the extended EIT or CST.

  FIG. 5 is a schematic diagram of a receiving device 2 according to an embodiment of the present invention. The receiving apparatus 2 includes an OFDM demodulator 20 having a receiving antenna, a TS decoder 21, a video decoder 22, an audio decoder 23, a caption / caption super decoder 24, a carousel decoder 25, and a BML. Browser 26, output processing I / F unit 27, SI processing unit 28, content storage reservation control unit 29, storage unit 30, stored content list display / playback instruction unit 31, and stored content management table display / playback An instruction unit 32, a user I / F unit 33, and a stored content reproduction control unit 34 are provided.

  The OFDM demodulator 20 demodulates the EIT program information constituting the extended EIT or CST data, receives a function of sending this TS to the TS decoder 21, and content data corresponding to the extended EIT or CST, 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, extended EIT or CST data can be identified by detecting the PID in TS data and reading this PID, detecting the ES number (component_tag), and The desired data can be identified by reading.

  The TS decoding unit 21 decodes the EIT program information obtained through the OFDM demodulation unit 20 to decode the extended EIT or CST data and sends it to the SI processing unit 28, and the EIT obtained through the OFDM demodulation unit 20 The content data corresponding to the program information is decoded and sent to the video decoding unit 22, the audio decoding unit 23, the caption / caption super decoding unit 24, and the carousel decoding unit 25, which are the corresponding functional units. The video decoding unit 22, the audio decoding unit 23, and the caption / subtitle super decoding unit 24 have a function of decoding the video, audio, and caption / subtitle superimposing the stored content, respectively, and sending them to the output processing I / F unit 27. The carousel decoding unit 25 has a function of decoding the data broadcast data for organizing the stored content while performing the carousel process according to the 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 output processing I / F unit 27. The output processing I / F unit 27 has a function of presenting video, audio, caption / caption super, and other data for organizing stored content on an external device (for example, a display device, a speaker, etc.).

  However, the carousel decoding unit 25 controls the acquisition and storage of content data corresponding to the extended EIT or CST by the control signal from the content storage reservation control unit 29, and the content data corresponding to the extended EIT or CST is Accumulate in the storage unit 30. The content data stored in the storage unit 30 is managed by the content storage reservation control unit 29, and the content storage reservation control unit 29 performs overwriting update or replacement of the stored content acquired in units of data blocks according to the extended EIT or CST. Function for storing and updating “storage reservation management table” for managing storage reservation of content files used for control of storage reservation and “storage content management table” for managing presence / absence of storage of content files in storage unit 30 Have

  The content file stored in the storage unit 30 and the “accumulation reservation management table” and the “accumulation content management table” are stored content so that the user can display or reproduce them by designating via the user I / F unit 33. The 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 extended EIT or CST data, and broadcasts the EIT information of the broadcast content for each channel, the broadcast start time of each stored content, the broadcast duration, and the “event identifier” ”Including PSI / SI information (that is, EIT program information) 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.

  The storage reservation management table display / storage reservation instruction unit 31 displays the “storage reservation management table” stored in the storage unit 30 on a display device (not shown) in response to a display instruction of the storage reservation management table from the user. To do. Also, a reservation instruction signal is sent to the content storage reservation control unit 29 in response to a storage content storage reservation instruction from the user.

  The stored content management table display / playback instruction unit 32 displays the “stored content management table” stored in the storage unit 30 on a display device (not shown) in response to a display instruction of the stored content management table from the user. . Further, in response to a stored content playback instruction and playback end instruction from the user, a playback instruction signal and a playback end instruction signal are sent to the stored content playback control unit 34.

  When the stored content playback control unit 34 receives the playback instruction signal from the stored content management table display / playback instruction unit 32, the stored content content file for which playback has been instructed from the storage unit 30, and the content type ( content_type_value). Then, the stored content reproduction control unit 34 controls the reproduction operation of the content file, as will be described later, according to the acquired content type.

  The receiving apparatus 2 reserves storage by event_id or the like, and executes reception of a file transmitted by the data carousel at the reserved time. If accumulation is not completed due to a packet being missed during accumulation, it transitions to the accumulation standby state again, waits for reservation until the next date and time described in the accumulation broadcast schedule information, and when the broadcast time comes It will be in the accumulation state and it is possible to complement missing data. When the version of the content to be transmitted is updated, the content can be stored as another version by referring to the value of data_event_id in the file transmission descriptor.

  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 general stored content, it is possible to uniquely specify the stored content by specifying event_id. However, if you want to specify items in the stored content uniquely like a news program, in addition to event_id ex_event_id is used. 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 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. A case is assumed where stored contents of 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 the storage service, it is common that transmission is performed at a predetermined time and the stored content is automatically stored in the receiving device 2. A service in which the 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, in the overwritten update (always updated) stored content, if the item in the stored content needs to be identified, the value of ex_event_id is always given, and if the item in the stored content need not be identified, 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. 6 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 is configured such that EIT program information (in this example, the extended EIT or CST included in the EIT) constitutes the extended EIT or CST data at regular intervals. (Content_schedule) is distributed (steps S1 to S3). In addition, information on the current program and the next program (CST [p / f] or extended EIT [p / f]) including whether there is a change in broadcast program information that is time-organized according to the extended EIT or CST 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 transmits content data managed by an event identifier (event_id) according to the extended EIT or CST in a carousel method according to a predetermined period and number of times according to the extended EIT or CST. Retransmit (steps S5 and S6).

  For example, as shown in FIG. 8, 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 this main 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 be identified not only by channel IDs by service IDs (service_id) from EIT program information (extended EIT or CST) but also by time axis organization. Identify by event identifier (event_id) and identify the type of content file identified by event identifier (event_id) by “file type information (file_type_value)” in “file transmission descriptor (file_delivery_descriptor)” For example, an EPG organized as shown in FIG. 8 can be constructed immediately.

  Therefore, the receiving device 2 decodes the extended EIT or CST according to the present invention that functions as EIT program information, and grasps the channel-specific stored 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.

  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 time-organized according to the extended EIT or CST The current program and the next program (CST [p / f] or extended EIT [p / f]) including whether or not the broadcast program is changed are received (step S15). Accordingly, the receiving device 2 reacquires CST or extended EIT several minutes before the reservation time to confirm that there is no change in the broadcast content, and automatically updates the registered content of the storage reservation management table if there is a change. .

  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 time-organized according to the extended EIT or CST The current program and the next program (CST [p / f] or extended EIT [p / f]) including whether or not the broadcast program is changed are received (step S15). Accordingly, the receiving device 2 reacquires CST or extended EIT several minutes before the reservation time to confirm that there is no change in the broadcast content, and automatically updates the registered content of the storage reservation management table if there is a change. .

  The receiving device 2 controls the storage reservation of the stored content in accordance with the registration content of the storage reservation management table, and when the broadcast time comes, acquires the DII of the corresponding elementary stream (ES), and acquires the event identifier ( The content file to be stored is specified together with the content type by the download ID (downloadID) associated with event_id), and the data block (DDB) column in the corresponding module is received to store the stored content (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 or CST, the receiving apparatus 2 can automatically reacquire it according to the registered content 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). Also, using the information on the duration of the broadcast in the extended EIT or CST, when the broadcast time of the cycle ends with the accumulation not completed, if there is a rebroadcast, it is determined that the reservation accumulation is interrupted However, if there is no rebroadcast, it is determined that the reservation accumulation is stopped.

  In addition, when the content receiving apparatus 2 stores the 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, replacement or overwrite update storage is performed. Can be performed (step S18). In addition, if the stored content belonging to the same series as the overwrite update content is already stored, the update is performed, and if not, the stored content is stored as it is.

  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 or CST to be transmitted, creates a storage reservation management table, performs control management of storage reservations with this storage reservation management table, receives the stored content, and automatically accumulate. 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.

  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 a schedule information acquisition unit 2901, a time information processing unit 2902, a CST / 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 schedule information acquisition unit 2901 extracts the extended EIT or CST content schedule information from the input PSI / SI information (ie, EIT program information) and sends it to the CST / EIT information management unit 2903.

  The time information processing unit 2902 extracts the “event identifier” uniquely indicating the start time of each stored content, the broadcast duration, and the content file from the input PSI / SI information (ie, EIT program information). The data is sent to the EIT information management unit 2903.

  The CST / EIT information management unit 2903 generates a storage reservation management table by causing the storage reservation management table generation unit 2909 to function based on the content schedule information of the extended EIT or CST, and stores the content file in the storage unit 30. In accordance with an instruction from the storage reservation control unit 2904, a function to store, a function to cause the corresponding file determination unit 2905 to function and determine whether there is a file that can be reserved for storage from the content schedule information of the extended EIT or CST A function for marking a storage reservation management table for a content file to be reserved for storage, a function for operating the event identifier determination processing unit 2906 to determine information (event identifier, branch number, data event identifier) in the DII, and a differential DDB The decision processing unit 2907 functions to transmit data in multiple DDBs. A function for determining and storing a DDB that has not been accumulated for a data file and acquiring CST [p / f] or extended EIT [p / f], checking whether the reservation information has been changed, and storing if there is a change And a function of updating the reservation management table.

  The storage reservation control unit 2904 has a function of instructing the CST / EIT information management unit 2903 to control storage reservation of storage 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 accumulation from the content schedule information of the extended EIT or CST.

  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)”. Function identified by “file type information (file_type_value)”, “content type information (content_type)” representing content type, “event identifier (event_id)”, and “series descriptor (series_id)” as content information And a function of performing reservation accumulation control for each content type. In addition, the event identifier determination processing unit 2906 has 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 (that is, the file version is updated). It has an overwrite accumulation determination unit 2906a that determines whether or not (content file) exists, and performs replacement or overwrite storage when it exists. In addition, the overwrite accumulation determination unit 2906a determines whether the content is overwrite update content from the content type information (content_type) or the CST update_flag information, and the accumulated content belonging to the same series is accumulated in the case of the overwrite accumulated content. If there is no stored content belonging to the same series that is overwritten, it is stored as it is.

  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 decoding 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 decoding unit 25 in order to control acquisition and storage of the DDB of the content file corresponding to the extended EIT or CST in accordance with an instruction from the event identifier determination processing unit 2906. The download ID determination processing unit 2908 also performs carousel decoding of the control signal to control 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 content schedule information of the extended EIT or CST under the control of the CST / EIT information management unit 2903.

  The stored content management table generating unit 2910 has a function of generating a stored content management table for managing stored content stored according to the storage reservation management table under the control of the CST / 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 expands the received and decrypted extended EIT or CST content schedule information 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” in “file transmission descriptor (file_delivery_descriptor)”. (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 CST / EIT information management unit 2903 a few minutes before the storage reservation time based on the event identifier acquired by the time information processing unit 2902 (step S35). p / f] or extended EIT [p / f] is acquired (step S36), whether or not reservation information has been changed is confirmed (step S37), and if there is a change, the storage reservation management table is updated (step S37).

  Subsequently, the content storage reservation control unit 29 acquires the DII of the download ID (downloadID) associated with the event identifier (event_id) by using the event identifier determination processing unit 2906 and the download ID determination processing unit 2908, and overwrites the storage determination unit 2906a. To determine whether or not there is stored content that has the same event identifier (event_id) and “branch number” but a different data event identifier (data_event_id) (step S39). It is determined to overwrite or accumulate (step S40).

  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 event identifier (event_id) in the download ID in the DII is determined, and the content file type identified by the event identifier (event_id) is set to “file transmission descriptor (file_delivery_descriptor)”. Function identified by “file type information (file_type_value)”, “content type information (content_type)” representing content type, “event identifier (event_id)”, and “series descriptor ( series_id) '' Reservation accumulation control is performed for each item type, and is executed until the DDB accumulation is completed by the differential DDB determination processing unit 2907 (step S42). If it is not completed, the differential DDB is acquired and accumulated (step S42). S43). For example, as shown in FIG. 11A, when the content type of the content file determined by the file type information is a scheduled broadcast of the same content file among the time-organized content files, As shown in FIG. 11B, the event identifier (event_id) of CST or extended EIT is associated with the download ID (downloadID) in the carousel DII, as shown in FIG. It is possible to specify a DDB for each event identifier (event_id) of CST or extended EIT, perform overwrite accumulation on the same file name, or receive a DDB of a difference.

  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 that has been stored is generated and stored in the 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, “Content type information (content_type)” indicating the content type as well as controlling the operation of the storage reservation by acquiring the stored content of “rebroadcast (second and subsequent broadcasts)” transmitted by the carousel transmission method. And “event identifier (event_id)” and “series descriptor (series_id)” as content information can be combined to perform reservation accumulation control for each content type.

  The user can specify reading of the stored content management table stored in the storage unit 30. The stored content stored in the storage unit 30 is subjected to playback control by the stored content list display / playback instruction unit 31, and the user Can be presented.

  As described above, the reception device 2 can acquire information necessary for storage reservation of stored content (including reservation recording in the case of video or the like) from the extended EIT or CST. “File transmission descriptor (file_delivery_descriptor)” is added to the extended EIT or CST, and the file type is immediately identified by “file type information (file_type_value)” in “file transmission descriptor (file_delivery_descriptor)”, and the stored content It is also possible to immediately create a storage reservation management table for the storage reservation and immediately acquire the stored content. 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.

  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.

  In other words, since the content file to be distributed is uniquely identified using the event identifier (event_id) and the download ID (downloadID) of DII in which the event identifier (event_id) is embedded, the file size of item news and the like is distributed small In the case of a file having a short time, a large amount of information on extended EIT or CST is required on the composition time axis, and the amount of information on extended EIT or CST becomes large. 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, detailed files can be distributed without increasing the amount of information of extended EIT or CST.

  Furthermore, the content type of “single content”, “series content”, “overwrite update content”, and “multiple item content” is identified from “content type information (content_type)” included in the extended EIT or CST, and is used as content information. It is possible to identify whether or not the program is a series program from the “series descriptor (series_id)” in combination with the “event identifier (event_id)” included in the DII and perform reservation accumulation control according to the content type. become.

  As described above, according to the present invention, the receiving device 2 acquires information on the extended EIT or CST in advance for use in the storage reservation, and actually stores and broadcasts the information described in the extended EIT or CST. The file information and event identifier are identified from the time information and the “file transmission descriptor”, and it is determined whether or not the file stored based on these information is supported. Therefore, it is possible to make an efficient reservation for stored broadcasting.

  In addition, since all DDBs in the data carousel have unique block numbers in the data carousel, it is possible to manage the unique DDB for each event identifier (event_id) by the receiving device 2. Even when the reception state is unstable, it is possible to efficiently accumulate files by acquiring only the differential DDB in the data carousel repeatedly transmitted.

  Hereinafter, a more specific example is shown and a difference with a prior art is demonstrated.

  Provided a mechanism for mitigating the difference between the request on the receiving device 2 side and the request on the broadcasting station side transmission device 1 in acquiring the content schedule information in advance and making a storage reservation for the stored content. become.

  For example, as shown in FIG. 14, on the receiving device 2 side, the content file of the file element (1, 2, 3) can be received by the program A (event_id = 1) in three times, and the stored content is replaced. When there is an update (for example, file element 3 ′), the content file of the file element (3 ′, 4, 5) can be received by the time organization of three times in the program B (event_id = 2). Suppose you want to identify content replacement updates. In this case, transmission of the latest news is delayed with respect to the broadcasting station side transmitting apparatus 1, and it takes time until the receiving apparatus 2 also replaces it.

  On the other hand, in order to send the latest news as soon as possible, the broadcasting station-side transmitting device 1 has a time organization of six times while sequentially updating file elements in one program (event_id = 1), Suppose that it is desired to send out while updating when the necessity of replacement update occurs (for example, file element 3 ′). In this case, on the receiving device 2 side, in order to store the stored content, all the carousels must be received and monitored even though the stored content is already stored. As a result, the accumulation control becomes uneven and the power consumption load increases, which increases the possibility that the data will be missed in competition with the accumulation schedule of other channels.

  For this reason, in the present invention, it is possible for the receiving device 2 side to acquire only unacquired (unaccumulated) DDB and complete reception of a content file, and to distribute a small file in a short time In order to increase the possibility of reception, the file size of the CST or extended EIT is made as small as possible, and according to the type of stored content (for example, a news program is divided and distributed for each news item) The content type value from “content type information (content_type)” included in the extended EIT or CST, the value from “series descriptor (series_id)” as content information, Combined with each value of “event identifier (event_id)”, “branch number” and “data event identifier (data_event_id)” included in DII It is configured to be able to perform the reservation storage control according to the content type.

  Specific examples will be individually shown below. In the following example, an example will be described in which it is determined whether or not the stored content is to be updated by an update flag (update flag), but an update flag (update flag) is added to the information of “content type information (content_type)”. May be incorporated.

[Transmission and storage of one-time contents]
FIG. 15 is a diagram illustrating transmission and accumulation of single content. In the case of single content broadcast in a carousel, “series descriptor (series_id)” is not described in CST or extended EIT, the update flag is “0”, and “content type information (content_type)” Is “0”, the receiving device 2 side can refer to the “event identifier (event_id)” of the stored content from the information in the DII so as to control only the acquisition of the unstored differential DDB. it can.

  For example, in the example of FIG. 15, the receiving device 2 reserves to store the stored content A with event_id = 1 by CST or extended EIT, acquires DII when the broadcast time comes, and if event_id = 1, stores the corresponding DDB. Acquire and store, and after completing the storage, the reservation information in the storage reservation management table is discarded, and the second and subsequent repeated broadcasts are not received. Subsequently, the receiving device 2 reserves to store the stored content B of event_id = 2 by CST or extended EIT, acquires DII when the broadcast time comes, and acquires and stores the corresponding DDB if event_id = 2. If the storage fails, the difference DDB that failed to be stored at the next repeated broadcast time is acquired again. After the storage is completed, the reservation information in the storage reservation management table is discarded, and the next and subsequent repeated broadcasts are not received. Get better.

[Transmission and accumulation of series contents]
FIG. 16 is a diagram illustrating transmission and accumulation of series content. In the case of series content broadcast on a carousel, in CST or extended EIT, “series descriptor (series_id)” is “1”, update flag (update flag) is “0”, and “content type information (content_type) ) ”Is“ 1 ”, the receiving apparatus 2 side refers to the“ event identifier (event_id) ”of the stored content from the information in the DII, and controls to acquire only the unstored differential DDB. be able to. In addition, when a change occurs in a file to be transmitted with respect to CST or extended EIT (accumulated content C → B), the updated CST or extended EIT is acquired, and the “event identifier ( event_id) ”, it is possible to control to acquire only the unstored difference DDB.

  For example, in the example of FIG. 16, the receiving apparatus 2 automatically reserves all stored contents with series_id = 1 as the series contents with the stored contents A with event_id = 1 as the series contents by CST or extended EIT, and sets DII when the broadcast time comes. If event_id = 1, the corresponding DDB is acquired and stored. After the storage is completed, the reservation information in the storage reservation management table is discarded, and the second and subsequent repeated broadcasts are not received. Subsequently, the receiving device 2 acquires DII when the broadcast time of event_id = 2 is reached in CST or extended EIT, acquires and stores the corresponding DDB if event_id = 2, and if the storage fails. The difference DDB that has failed to be stored at the next repeated broadcast time is acquired again, and after the storage is completed, the reservation information in the storage reservation management table is discarded, and the next and subsequent repeated broadcasts do not have to be received. Subsequently, the broadcasting station side transmitting apparatus 1 is scheduled to broadcast the stored content C of series_id = 1 with event_id = 3, but instead of the stored content C, the stored content B belonging to the same series broadcast before is sent. In this case, the information regarding event_id = 3 is deleted by CST or extended EIT, and the broadcast time of event_id = 3 is added to the broadcast time of event_id = 2 (there is no information of event_id = 2 in CST or extended EIT) Add it again in case). Subsequently, the receiving apparatus 2 can determine that the stored content B of event_id = 2 can be stored when the broadcast time of event_id = 3 is reached by CST or extended EIT. .

[Transmission and storage of series contents with multiple items]
FIG. 17 is a diagram illustrating transmission and accumulation of series content having a plurality of items. In the case of series content having a plurality of items broadcast on the carousel, in the CST or extended EIT, “series descriptor (series_id)” is “1”, the update flag (update flag) is “0”, “ Since the “content type information (content_type)” is “1”, the receiving device 2 only refers to the “event identifier (event_id)” of the stored content from the information in the DII, and only acquires the unstored differential DDB. For multiple item content, the receiving device 2 refers to the “branch number” and “version (value of data_event_id)” of “event identifier (event_id)” in DII for each item. It is possible to control so as to perform only acquisition of the unstored difference DDB.

  For example, in the example of FIG. 17, the receiving device 2 makes a storage reservation for the stored content A with event_id = 1 by CST or extended EIT. At that time, make a series reservation. When series reservation is selected, all stored contents with series_id = 1 are automatically reserved. The receiving device 2 acquires DII at the broadcast time and stores it if event_id = 1. At this time, the stored content is identified by the branch number in DII. When the next DII comes, the receiving device 2 stores the stored content (branch number) that has not been stored yet with event_id = 1. When there is stored content that has failed to be stored, the receiving device 2 goes to acquisition again at the next broadcast time and performs differential reception. If all the stored contents can be stored, it will not go to the next broadcast time. On the other hand, the transmission apparatus 1 on the broadcast station side is scheduled to broadcast the stored content B of series_id = 1 with event_id = 2, but instead of the stored content B, the stored content A belonging to the same series broadcast before is transmitted. In this case, the information regarding event_id = 2 is deleted by CST or extended EIT, and the broadcast time of event_id = 2 is added to the broadcast time of event_id = 1 (when there is no information of event_ied = 1 in CST or extended EIT) , Add it again.) Therefore, the receiving device 2 does not need to be acquired if the stored content A has already been stored, and can be configured to go to acquisition at the broadcast time if it has not been stored yet. In addition, the stored content C with event_id = 3 has three branch numbers, and if there are those previously broadcast, the receiving device 2 acquires DII when the broadcast time of event_id = 3 is reached. If event_id = 3, the stored content C is stored, but if there is an already stored branch number, it is not stored redundantly. In addition, when the reception device 2 has succeeded in the accumulation, the reception device 2 does not have to go to the acquisition after the next repeated broadcast time. In addition, the receiving device 2 has three branch numbers in the stored content D of event_id = 4, and some of them have been broadcast before but the contents are changed, and the version of the branch number (value of data_event_id) ) Is different from the previously acquired value, the broadcast time of event_id = 4 is obtained and DII is acquired. If event_id = 4, the stored branch number is already stored when storing the stored content D. The different versions can be configured to accumulate and replace. Note that the receiving device 2 does not have to go to acquisition at the next and subsequent repeated broadcast times when the accumulation is successful.

[Transmission and storage of overwrite update content]
FIG. 18 is a diagram illustrating transmission and accumulation of overwrite update content. In the case of overwritten update content broadcast on a carousel, in CST or extended EIT, “series descriptor (series_id)” is “1”, the update flag (update flag) is “1”, and “content type information ( content_type) ”is“ 2 ”(however, when it is intended to identify“ overwrite update ”, it may be“ 0 ”or“ 1 ”). With reference to the “event identifier (event_id)” of the content, it is possible to control only to acquire the unaccumulated differential DDB, and to store the accumulated content of the event identification (event_id) different from the accumulated content accumulated with the same series_id. If received, overwrite it.

  Hereinafter, as another example, an example will be described in which accumulation is performed by discriminating with a combination of “series descriptor (series_id)” and “branch number” in order to execute accumulation reservation according to the content type.

[Transmission and reception of one-off contents]
FIGS. 19A and 19B are diagrams illustrating an example of single content transmission. When broadcasting the accumulated content (game [A], game [B]) with the time organization as shown in FIG. 19A, the receiving apparatus broadcasts a predetermined number of times in consideration of reception failure. In this example, the receiving apparatus 2 identifies the broadcast frame (including the initial broadcast and the repeated broadcast) by “event identifier (event_id)”, and there is no description of “series descriptor (series_id)” or “0”. Thus, it is identified as “single content” without referring to “content type information (content_type)”. The “branch number” is used to identify that the single content is “game [A], game [B]”. As in the example of FIG. 15, the operation of the storage reservation eliminates the need to receive again the stored content that has been successfully received.

[Transmission and accumulation of series contents]
FIGS. 20A and 20B are diagrams illustrating an example of transmission of series content. When broadcasting accumulated content (series content [1], [2]) with time organization as shown in FIG. 20A, the receiving device broadcasts a predetermined number of times in consideration of reception failure. In this example, the receiving device 2 identifies all broadcast frames (event_id = 1, 2) whose description of “series descriptor (series_id)” is “1” as broadcast frames in which stored content of the same series is broadcast. Then, DII is acquired when the broadcast time of event_id = 1, and accumulated if event_id = 1, and DII is acquired when the broadcast time of event_id = 2, as shown in FIG. 20, "series descriptor (series_id)" ”And“ branch number ”are different from each other, it is determined that they are different stored contents of“ series content ”, and storage is executed.

[Transmission and storage of multi-item contents]
FIGS. 21A and 21B are diagrams illustrating an example of transmission of multiple item content. When content (multiple item content [F] to [L]) is broadcast in a time organization as shown in FIG. 21 (a), it is broadcast in a predetermined number of carousels in consideration of reception failure on the receiving device side. In this example, the receiving device 2 identifies all broadcast frames (event_id = 1, 2) whose description of “series descriptor (series_id)” is “1” as broadcast frames in which stored content of the same series is broadcast. Then, when the broadcast time of event_id = 1 is reached, DII is acquired, referring to “branch number”, recognized as “multiple item content” in “series content”, and reserved for storage for each “branch number” If event_id = 1 and unstored “branch number” is accumulated, DII is acquired at the broadcast time of event_id = 2, and the accumulated content as shown in FIG. If the combination of “series descriptor (series_id)” and “branch number” is different, it is determined that it is another accumulated content of “series content” and accumulation is performed (“series descriptor (series_id)” And the “branch number” combination is the same Stomach).

[Transmission and storage of overwrite update content]
FIGS. 22A and 22B are diagrams illustrating an example of transmission of overwrite update content. When the stored content (overwrite update content) is broadcasted in a time organization as shown in FIG. 22A, the receiving device side sequentially broadcasts a predetermined number of broadcasts in order to sequentially store new information. In this example, the receiving device 2 has a description of “series descriptor (series_id)” associated with the value of “event identifier (event_id)” being “1” and “content type information (content_type)” is “1”. In the case of indicating “overwrite update content”, all broadcast frames (event_id = 1, 2) whose description of “series descriptor (series_id)” associated with the value of “event identifier (event_id)” is “1”. , 3) is identified as a broadcast frame in which stored content of the same series is broadcasted, and when the broadcast time of event_id = 1 is obtained, DII is obtained, referring to “branch number” and “data event identifier (data_event_id)”, Recognizing that the stored content of each event_id is the content to be stored sequentially, as shown in FIG. 22, the combination of “series descriptor (series_id)” and “branch number” is the same as that of the stored content that has already been stored. , "Data event knowledge If the child (data_event_id) "differs delete to overwrite the stored content of the previously accumulated running accumulation.

[Replacement of accumulated content]
FIGS. 23A and 23B are diagrams illustrating an example of transmission of stored content to be replaced. When the stored content (replacement content) is broadcast with the time organization as shown in FIG. 23A, there is a case where the broadcast station wants to perform the replacement. In this example, the receiving apparatus 2 sets all broadcast frames (event_id = 1, 2, 4) whose description of “series descriptor (series_id)” is “1” as broadcast frames in which stored content of the same series is broadcast. When the broadcast time of event_id = 1 is obtained, DII is acquired, and referring to “branch number” and “data event identifier (data_event_id)”, as shown in FIG. If the combination of “series descriptor (series_id)” and “branch number” is the same and the “data event identifier (data_event_id)” is different, it is deleted to replace the stored content previously stored. In other words, when the broadcast time of event_id = 4, DII is acquired, and when event_id = 4, the combination of “series descriptor (series_id)” and “branch number” is the same, and “data event identifier (data_event_id)” is different It is assumed that the stored content has been modified and broadcast again, and the stored content is replaced.

  Next, further application examples of the present invention will be described.

[Transmission of genre information for multi-item contents]
In the above example, when a plurality of items of content is transmitted in a certain broadcast frame, it is necessary to lighten the reception processing of the extended EIT [p / f] or CST [p / f] in a receiving device that does not have high processing capability. Since the extended EIT is configured so as to describe only the content information of the broadcast frame, there is no method for assigning a genre for each of a plurality of item contents. For example, there is a broadcast frame of “National News 12 o'clock” for stored content broadcasts. If you want to send multiple news items related to politics, economy, and sports as genre-specific information in this broadcast frame, “News” The genre such as politics, economics, and sports cannot be transmitted to the receiving device 2 for each accumulated news only by the CST or the extended EIT.

  Therefore, by additionally describing “genre information” in DII, the broadcasting station-side transmitting apparatus 1 assigns a genre to each of a plurality of item contents transmitted in a certain broadcast frame in CST or extended EIT, and transmits stored contents. To do. The receiving device 2 can identify and store the genre for each of the plurality of item contents, and can use it for presenting and searching the stored contents.

[Transmission of the number of contents of multiple items]
In the above example, when a plurality of content items are sent in a certain broadcast frame, they are transmitted in separate carousels during the broadcast time. When all stored content has been sent, it will be broadcast repeatedly during the broadcast period. In a receiving apparatus that does not have high processing capability, it is necessary to lighten the reception process of the extended EIT [p / f] or CST [p / f], and the stored content information for each item is not sent. In this case, the receiving device 2 sequentially acquires DII within the broadcast time, and stores any DII that has not been stored. If the reception environment is good, it can be determined that all the stored content has been stored at the stage when the DII of the same content has been broadcast, and the process can be terminated. , It may not be possible to determine that all stored content has been stored.

  Therefore, by additionally describing the number of contents in DII, the receiving apparatus 2 can determine whether or not all of the plurality of stored contents can be stored even in a bad reception environment. This is to prevent the receiving device 2 from erroneously judging that all stored contents have been stored at the time of carousel switching and transmitting the next carousel when transmitting multiple item contents in different carousels. There is also an effect.

[Send with the same event_id in all broadcast frames]
In the existing EIT, event_id is used to identify the stored content as a unique “event”. However, in each stored content in the multi-item content, it is possible to send the same stored content with different event_id. It may be desirable for the two sides, and the event_id and the stored content cannot be made to correspond one-to-one. Therefore, in this case, the example in which the stored content is uniquely identified by the combination of series_id and branch number has been described above. However, if configured in this way, it will not be possible to meet the desire to use event_id uniformly as a value for uniquely identifying all stored contents.

  Therefore, the broadcast station side transmission device 1 uses the event_id of multiple items content such as news and automatic update content such as weather information and road traffic information as the same value in all broadcasts, and the reception device 2 stores the event_id. The content is received at all broadcast times. FIG. 24 is a diagram illustrating a configuration in which event_id is the same in all broadcast frames in the broadcast system according to the embodiment of the present invention. For example, instead of acquiring data_event_id and confirming whether or not there is an update, it receives p / f for the stored content of the event_id, and the stored content to be updated by an update information descriptor or identifier (described later) included in p / f It can be configured to determine whether or not there is a presence.

[Notification of storage content change information before storage execution]
In the above example, in order to realize the accumulation of broadcast waves in multimedia broadcasting for mobile terminals, it is possible to repeatedly broadcast by changing the transmission time so that it can be stored regardless of the reception environment. Since it is important to suppress power consumption for driving, an example has been described in which, when reception is successful once, acquisition is not performed during retransmission.

  Further, when the receiving apparatus 2 is put into a dormant state, when news content or the like is changed or replaced in the middle, the receiving apparatus 2 is activated at all retransmission times and a data_event_ID of DII is acquired as means for knowing that the change has occurred. This made it possible to confirm the replacement.

  However, depending on the transmission method of stored content, the power consumption of the receiving device 2 is doubled the number of retransmissions under the worst condition, resulting in poor efficiency. Further, since it is necessary to receive DII in order to obtain change information, DII only flows while the stored content main body is being sent out. Therefore, the receiving apparatus 2 does not know whether there is a change unless the retransmission time is reached. The problem of not remaining remains.

  In view of this, a mechanism is provided in which the receiving device 2 is notified in advance of whether or not the stored content has been changed, and a receiving operation is not required when it is unnecessary. By giving information that indicates whether or not there is a change at the time of retransmission to an SI that sends a program schedule such as EPG or ECG, the receiving apparatus 2 is activated at the time of retransmission, and by acquiring SI information, It is possible to determine whether the version has been changed. When there is a change, the accumulation operation can be performed, and when there is no change, the standby state can be shifted. In order to cope with such a case, it is preferable to newly provide a descriptor indicating that the version of the re-transmission content is changed as an update information descriptor or an identifier and incorporate it in the extended EIT or CST. . For example, it may be determined in advance whether the content (possible in units of items) has been updated with ex_event_id and data_event_id of the file transmission descriptor of the extended EIT [p / f] or CST [p / f], or CST [ It is possible to determine in advance whether or not the stored content has been updated with file_version_number of “schedule] and CST [p / f].

[Notify location information of stored content]
In order to associate the stored content of the multimedia broadcast for portable terminals with the application (map application) of the receiving device, it is preferable to provide the receiving device 2 with location information for each stored content. At that time, it is also necessary for a receiving apparatus with a small storage capacity or battery capacity not to store unnecessary stored content based on the position information. However, there is no means for acquiring position information before or after the accumulation of narrow-band broadcast waves that cannot use metadata.

  Therefore, the stored content is associated with the application of the receiving device by providing the receiving device 2 with the location information for each stored content described in SI, DII, or a predetermined resource list for sending a program schedule such as EPG or ECG. be able to. For example, as shown in FIG. 25 (a), the latitude / longitude information for each stored content is described in DII, and as shown in FIG. 25 (b), the resource list and the stored content are set as one set. It is conceivable to compose the data and describe latitude / longitude information for each stored content in this resource list.

  Thereby, for example, a mobile reception terminal that receives stored content such as traffic information that is sequentially updated can display stored content associated with latitude / longitude information (see FIG. 26).

  As described above, by describing the location information in the SI for sending a program schedule such as EPG or ECG, it is possible to control not to store the stored content in unnecessary places, and the load on the storage capacity and battery capacity of the receiving apparatus can be reduced. .

[Send content information to be broadcast now and next on CST]
In the above example, the example has been described in which the receiving device 2 acquires the extended EIT [p / f] or CST [p / f] immediately before executing the storage of the stored content. However, in CST including broadcast times other than the current and the next, when the number of repeated broadcasts increases (specifically, as shown in FIG. 27, only the portion related to the stored contents broadcasted at the present time and the next time is set to CST [p / The problem arises that the table size for confirmation also increases, even if CST [p] and CST [f] constituting f].

  Therefore, as another method, in the case of CST, even if the information of the broadcast time for each stored content is stored, only the portion related to the broadcast time for one time of the stored content to be broadcast next and the next is stored in each CST. CST [p] and CST [f] constituting [p / f] are configured (see FIG. 28). As a result, it is not necessary to receive p / f information related to stored content other than the storage target, and the table size can be minimized.

  As another method, in the case of CST, even if the broadcast time information for each stored content is stored, only the portion related to the broadcast time of the stored content to be broadcast next and the next time is stored in CST [p / F] are configured as CST [p] and CST [f] (see FIG. 29). As a result, even if the number of repeated broadcasts is large, only the information within the time required for the time being is obtained, and the table size can be minimized. Further, it can be determined whether or not there is a next repeated broadcast, and the receiving device 2 can determine the operation when the accumulation fails.

[Multi-item content information is transmitted by extended EIT / CST]
Information of each item content of the multi-item content is sent by the extended EIT / CST, and the receiver can use the information of each item content according to the processing capability. A receiving device having a low reception processing capability can ignore information on each item content.

  Each item content information includes a branch number and a data event identifier (data_event_id), and the number of item contents included in a plurality of item contents can also be known. Moreover, the genre information of each item content can also be described. For example, the file transmission descriptor can be described as shown in FIG.

[Integration of file_type_value and content_type]
Also, file_type_value and content_type in the file transmission descriptor can be collectively described as one identifier in the extended EIT or CST. For example, when grouping into file_type_value, file_type_value includes at least content type information such as file type information such as a TS file, content type information such as series content and overwritten update content, video content and stored content consisting of audio and data broadcasting. .
In this case, the data structure of the current and next CST [p / f] and the other CST [schedule] is as shown in FIG. file_version_number indicates an update information identifier. In CST [p / f], a file transmission descriptor including information on each item content of the plurality of item contents is inserted. Content nibble level 1 (Content_nibble_level1) and content nibble level 2 (content_nibble_level2) are genre information of major classification and middle classification, respectively, and specify the genre of each item content in combination. In an operation where only one data string is used in the service, component_tag can be omitted. In addition, a file information descriptor including the number of items of multi-item contents and genre information is inserted into DII.
When accumulating a plurality of item contents, the number of item contents and the genre information of each item contents are acquired from the file information descriptor in the DII. A receiver having high processing capability can acquire the number of item contents and the genre information of each item content from the file transmission descriptor of CST [p / f].
The receiving apparatus 2 determines whether update or replacement has occurred based on file_version_number of CST [p / f]. If the value of the data event identifier (data_event_id) of DII has changed, overwriting update or replacement is performed. The receiving device 2 with high processing capability checks the value of the data event identifier (data_event_id) in the file transmission descriptor of CST [p / f], and overwrites or replaces the item content whose value has changed.

  Therefore, in a comprehensive manner, in the broadcasting station side transmission device 1, the program schedule table (extended EIT or CST) includes a service ID that uniquely specifies a service for broadcasting each content file, a start time, a broadcast duration, and A content including an event identifier uniquely representing a content file and content type information representing a content type, and having a program schedule table transmitting means for transmitting the program schedule table at predetermined intervals, and an event identifier associated in the program schedule table Content file transmitting means for transmitting a file in a data block by a carousel method, the event identifier is also described in header information broadcast together with the data block, and the content file transmitting means To perform the accumulation operation corresponding to the content type on the receiving side, configured to transmit and the header information, to control the combination of the content type information the content file.

  In general, the receiving device 2 receives a program schedule table (extended EIT or CST) and stores the content associated with the program schedule table (extended EIT or CST). Reservation for identifying the organization in the time axis direction by an event identifier, and reserving the storage of the content file identified by the event identifier by identifying the combination of header information and content type information broadcast together with the data block. The management table is generated, and the storage content specified to be reserved for storage is controlled to start the storage reservation at a predetermined start time. The storage of the storage content reserved for storage at the start time is stored in the header information and the content type information. Carousel depending on the combination Configured to run on a data block unit of formula.

  In addition, in a comprehensive manner, when the receiving device 2 receives a content file by a digital broadcast wave, a program schedule table (extended EIT) required to reserve the storage of the plurality of stored contents on the receiving side. (Or CST), the program schedule table (extended EIT or CST) uniquely represents a service ID that uniquely specifies a service for broadcasting each content file, a start time, a broadcast duration, and the content file. It includes an event identifier and content type information indicating the content type. The event identifier is also described in header information of a data block broadcast by digital broadcasting, and reserves storage of the content file identified by the event identifier. Storage reservation management table for content type The storage content specified to be stored and reserved in the storage reservation management table is controlled at the start time, and the start of the storage reservation is controlled at the start time. According to the combination of the header information and the content type information, it is configured to execute in units of carousel data blocks.

  In addition, comprehensively, in the receiving device 2, accumulation according to the content type of “single content”, “series content”, “overwrite update content”, and “multiple item content” from the combination of header information and content type information. It can be configured to perform control.

  In general, in the receiving apparatus 2, the program schedule table includes a “series descriptor” for identifying the content information of the series program, and the event identifier is the DII that is the carousel header information. The download ID includes the event identifier “branch number” and “data event identifier”, and includes “single content”, “series content”, “overwrite update content”, The storage method for each content type of “multiple item contents” is transmitted by the content type information and “series descriptor” defined in the program schedule table and the header information DII, based on the event identifier. Sent by “branch number” and “data event identifier” Based on the event identifier, the content type information and the “series descriptor” and the “branch number” and “data event identifier” transmitted in the header information DII correspond to the content type. The storage control can be determined and executed.

  In general, in the receiving device 2, the header information includes genre information of a plurality of item contents. For accumulation of the plurality of item contents, execution of accumulation control as accumulation contents for each genre information, The storage control is executed based on the content number information.

  Also, in a comprehensive manner, in the receiving apparatus 2, the program schedule table includes an update information descriptor or an identifier indicating that the version of the retransmission content is changed, and the version information of the retransmission content specified by the update information descriptor. Is acquired from the header information, and accumulation of retransmission contents is executed.

  In general, in the receiving device 2, the header information includes latitude / longitude information for each accumulated content, and when executing accumulation for each accumulated content, the latitude / longitude information is extracted from the header information, The storage content corresponding to the latitude / longitude information is stored.

  In general, in the receiving device 2, the program schedule table includes broadcast time information for each stored content, and before executing the storage of the stored content, the current and next in the program schedule table in advance. It is configured to acquire tables CST [p] and CST [f] each configured only for the portion related to the stored content to be broadcast, and determine whether there is a change in the stored content to be stored.

  In general, in the receiving device 2, the program schedule table includes broadcast time information for each stored content, and before executing the storage of the stored content, the current and next in the program schedule table in advance. Tables CST [p] and CST [f] each comprising only one part or two parts of the broadcast time related to the broadcast time are acquired to determine whether or not the stored contents to be stored are changed. Composed.

  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 for automatically performing another accumulation operation is provided even when the reception apparatus 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 digital broadcast stored content 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 Video decoding part 23 Audio | voice Decoding unit 24 Subtitle / subtitle super decoding unit 25 Carousel decoding unit 26 BML browser 27 Output processing I / F unit 28 SI processing unit 29 Content storage reservation control unit 30 Storage unit 31 Stored content list display / playback instruction unit 32 Stored content management table Display / playback instruction unit 33 User I / F unit 34 Stored content playback control 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 Schedule Information Acquisition unit 2902 Time information processing unit 2903 CST / EIT information management unit 2904 Storage reservation control unit 2905 Corresponding file determination unit 2906 Event identifier determination processing unit 2906a Overwrite storage determination unit 2907 Difference DDB determination processing unit 2908 Download ID determination processing unit 2909 Storage reservation Management table generator 2910 Stored content management table generator

Claims (12)

A receiving device that receives a program schedule table required to reserve storage of a plurality of stored contents on a receiving side when receiving a content file with a broadcast wave of digital broadcasting,
The program schedule table includes a service ID that uniquely designates a service that broadcasts each content file, a start time, a broadcast duration, an event identifier that uniquely represents the content file, and content type information that represents a content type. ,
The header information of the de Taburokku are described the event identifier and downloaded ID is
A storage reservation management table generating means for receiving the program schedule table and generating a storage reservation management table for storing the content file identified by the event identifier by adding the content type information;
Content storage reservation control means for controlling the start of storage reservation at the start time for storage content defined to be stored in the storage reservation management table;
Content storage execution means for executing storage reservation of storage content reserved for storage at the start time in units of carousel data blocks according to the combination of the download ID and the content type information;
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.   The receiving apparatus according to claim 1, wherein the program schedule table includes broadcast time information of each stored content for each number of repetitions of the carousel method. The content accumulation execution means executes accumulation control according to the content type of “single content”, “series content”, “overwrite update content”, and “multiple item content” from the combination of the download ID and the content type information. The receiving device according to any one of claims 1 to 3, further comprising: The program schedule table includes a “series descriptor” for identifying content information of a series program,
The event identifier is added in association with the download ID in DII, which is the header information of the carousel method,
The download ID includes the event identifier “branch number” and “data event identifier”,
A storage method for each content type of the “single content”, the “series content”, the “overwrite update content”, and the “multiple item content” is defined in the program schedule table based on the event identifier. Further, the content type information and the “series descriptor”, and the “branch number” and the “data event identifier” transmitted in the header information DII are defined on the transmission side,
The content storage execution means uses the content type information, the “series descriptor”, and the “branch number” and the “data event identifier” transmitted in DII as the header information based on the event identifier. The receiving apparatus according to claim 4, further comprising means for determining and executing accumulation control according to the content type. The header information includes latitude / longitude information for each stored content for the “overwrite update content”,
The content storage execution means extracts latitude / longitude information from the header information and stores the stored content corresponding to the latitude / longitude information when executing storage for each stored content with respect to the “overwrite update content”. The receiving device according to claim 4, further comprising means for executing. The header information includes genre information of multiple item content,
The receiving apparatus according to claim 1, wherein the content accumulation execution unit includes a unit that performs accumulation control as accumulation content for each genre information with respect to accumulation of the plurality of item contents. The header information includes information on the number of contents constituting a plurality of item contents,
The receiving apparatus according to claim 1, wherein the content accumulation execution unit includes a unit that performs accumulation control on the basis of the information on the number of contents regarding the accumulation of the plurality of content items. The program schedule table includes an update information descriptor indicating that the version of the retransmission content is changed,
The content storage execution means includes means for acquiring version information of the retransmission content specified by the update information descriptor from the header information and executing the storage of the retransmission content. The receiving device according to one item. The program schedule table includes broadcast time information for each stored content,
The content storage execution means, before executing the storage of stored content, tables CST [p] and CST [f, each of which is configured in advance only in the program schedule table relating to the current and next stored content. The receiving apparatus according to claim 1, further comprising: a unit that determines whether or not the stored content to be stored is changed. The program schedule table includes broadcast time information for each stored content,
The content storage execution means configured in advance only the portion related to the broadcast time of one or two times of the stored content to be broadcasted presently and next in the program schedule table before executing the storage of the stored content. The receiving device according to any one of claims 1 to 10, further comprising means for acquiring the tables CST [p] and CST [f] and determining whether or not the stored content to be stored is changed. When receiving a content file on a digital broadcast wave, a receiving apparatus that receives a program schedule table required to reserve storage of a plurality of stored contents on the receiving side. service ID and the start time for uniquely specifying a service for broadcasting files, broadcast duration, and includes an event identifier uniquely representative of the contents file, and content type information indicating the content type, the header information of the de Taburokku is , The event identifier and the download ID are described,
A storage reservation management table for receiving a reservation of a content file identified by the event identifier is generated by adding content type information to the computer constituting the storage control unit in the receiving device. And steps to
Storing stored contents defined to be stored and reserved in the storage reservation management table at a start time of the storage reservation; and
Executing accumulation of accumulated content reserved for accumulation at the start time in units of carousel data blocks according to the combination of the download ID and the content type information;
A program for running

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