JP5593193B2 - Broadcast service transmitter, receiver, and program thereof - 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 that is downloaded and distributed from a broadcast station on the reception side, and in particular, real-time broadcasting. The present invention relates to a broadcasting service transmitting apparatus, a receiving apparatus, and a program for downloading and distributing the arbitrary file attached to the content.

  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 by download distribution from a broadcasting station and acquiring it by a receiving apparatus is described as “unique data broadcasting” in ARIB STD-B24, and TR-B13, which is an operation rule of digital radio. E profile.

  In the current technology, when a plurality of contents are collectively stored in one download program (broadcast frame), the conventional EIT is 1 in the content descriptor in the program arrangement information used for digital broadcasting in ARIB STD-B10. It is not assumed 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), it is proposed to collectively store a plurality of contents in one download program using metadata.
(Before content storage) Since information related to a plurality of contents (content identification information, genre, etc.) is described and transmitted in “download information” for this broadcast frame, 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 download program.

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

  However, in the conventional EPG, there is no information regarding the download file corresponding to the type of content in the broadcast SI information, so an EPG for downloading a download file corresponding to the type of content cannot be realized.

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

  In recent years, the demand for broadcasting services for mobile receiving terminals such as multimedia broadcasting assuming mobile reception by mobile receiving terminals has increased, so that content that can be downloaded and broadcasted reliably can be received even in unstable reception conditions. The construction of a broadcasting system is desired.

  In particular, in the conventional technology, for content composed of a plurality of items even with the same service ID, each item content is transmitted in a separate carousel. In this case, when the carousel is switched, the receiving apparatus also switches the reception process, and in consideration of the loss at the time of switching, the transmitting apparatus needs to transmit the carousel to be transmitted one or more times redundantly. is there.

Further, in the program schedule system using the current EPG, the user of the receiving device determines the overwrite update operation accompanying the reservation accumulation on the receiving device side according to the type of content such as single-shot content or series content. Therefore, it must be set sequentially, which is extremely inconvenient. In particular, even for content during real-time broadcasting, there is an annoyance that a content file must be acquired separately by download broadcasting after confirming whether the content can be downloaded after viewing.
Furthermore, receiving devices that cannot receive data broadcasts are still prevalent, and even receiving devices in the V-LOW band, such as car radios, are not expected. There is a problem that a data broadcast parser is required to download real-time broadcast-linked content with such a receiving apparatus.

  Accordingly, an object of the present invention is made in view of the above-described problems, and it is an object of the present invention to provide a broadcasting service transmitting apparatus, a receiving apparatus, and a program for downloading and distributing an arbitrary file including a content file.

  In the present invention, a “file transmission identifier” (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, and the “extended EIT” ( Information necessary for content-oriented storage reservation (including scheduled recording in the case of video, etc.) that enables the creation and transmission of a content table for content storage reservation, and the configuration of transmission (to be described later) It is assumed that a content schedule table (CST: a table composed of Content_Schedule_Section described later) is configured and transmitted.

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

  When the CST is used on the receiving device side, the CST is assigned to each content by “broadcast time identification information” indicating a data packet at the time of broadcasting of each content, a start time, a broadcast duration, and the number of broadcasts. Since the unique identifier (event_id) and the descriptor representing the description content of each content are included, the content table for storing and reserving the content associated with the CST is generated by receiving this CST. The content defined to be reserved for storage in the content table can be executed in units of data blocks transmitted at the start time in accordance with the carousel method.

What is important here is that the “extended EIT” and “CST” transmitted on the transmitting device side are defined in advance as a new descriptor or identifier considering the storage reservation operation on the receiving device side. The content type information (content_type) is embedded.
The content type information (content_type) defines at least “single content”, “series content”, “overwrite update content”, and “multiple item content”. Further, on the receiving apparatus side, it is possible to make an accumulation reservation corresponding to the type of content by combining the extended EIT or CST and the information of DII.

  “Single content” is a single content.

  “Series content” is content that constitutes a series program.

  “Overwrite update content” is, for example, content that is overwritten and updated. This is content that changes only the contents, such as weather information and road traffic information, and is intended for use only for storing the latest content.

  “Multiple item content” refers to, for example, a plurality of contents sent in a certain broadcast frame. For example, when sending a plurality of news items according to the situation in a broadcast frame of a program “National News 12:00”, when transmitting three contents with the same event_id, “News Item 1” is transmitted in the first carousel. Then, “news item 2” is transmitted in the second carousel, “news item 3” is transmitted in the third carousel, “news item 1” is transmitted in the fourth carousel, and “news item 2” is transmitted in the fifth carousel. 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, for example, a function in which a broadcast station modifies content after broadcast and broadcasts again to replace the stored content.

In the present invention, the following functions are realized in broadcast wave download using carousel transmission in a mobile reception environment.
(1) Execution of download of single contents, series contents, overwrite update contents, and multi-item contents (2) Execution of replacement of contents (3) Prevention of duplicate storage of the same contents (4) There is a broadcast frame, but new news No duplicate storage when broadcasting the same content as the previous time (5) If CST, hold all repeated broadcast times for each content (6) Accumulation operation during broadcast time is repeatedly transmitted by data carousel Acquisition of download broadcast data (7) In broadcast wave download in a mobile reception environment, it is required to repeatedly broadcast the same content because the reception environment is poor. In addition, in order to reduce power consumption because the mobile terminal is a target, it is required not to receive repeated broadcasts of content that has been successfully stored, or to constantly monitor the download channel stream.
(8) The following functions are realized in broadcast wave download using carousel transmission under a mobile reception environment.

  According to the present invention, it is not necessary to constantly monitor content that is repeatedly broadcast. In particular, according to the conventional technology, each item content is divided into separate carousels for a plurality of item contents including a plurality of items even with the same service ID. Therefore, on the transmitting device side, there is no need to transmit the carousel redundantly for more than one round, and even on the receiving device side, under the mobile reception environment, by eliminating the need to switch the receiving process, Downloading of broadcast waves can be realized while reducing the power consumption of the receiving device, and even for content during real-time broadcasting, it is confirmed separately whether it is downloadable content at the time of viewing or after viewing It is possible to automatically store the content file without the trouble of having to acquire the content file by download broadcasting.

  In other words, the transmission device according to the present invention is a transmission device that transmits a content file associated with content at the time of real-time broadcasting using a broadcast wave of digital broadcasting, and uniquely specifies a service for broadcasting each content file. Program schedule table generating means for generating a program schedule table, including a service ID, 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, and the program schedule table A program schedule table transmitting means for transmitting at a predetermined interval, a content file transmitting means for transmitting a content file having an event identifier associated in the program schedule table in a data block in a carousel method, A predetermined service for sending a content file to be transmitted by download broadcast and a content to be transmitted by real-time broadcast in the same TS with different service IDs, and grouping the real-time broadcast as primary and the download broadcast as secondary Content organization means for transmitting a group identifier.

  As a result, content files can be automatically stored by separate download broadcasting even for content at the time of real-time broadcasting on the receiving side.

  In the transmission device according to the present invention, the secondary content file may be electronic data (text, graphics, still image, audio signal, control information, PDF file, video file, etc.) associated with the video content transmitted by the primary. ).

  Accordingly, when the content at the time of real-time broadcasting on the receiving side is video content, one or more of text, graphics, still images, audio signals, control information, PDF files, and video files associated with the video content are stored. Enables automatic accumulation of content files.

Further, the receiving device of the present invention is a receiving device for automatically storing a content file at the time of download broadcasting associated with the content when receiving the content at the time of real-time broadcasting with a broadcast wave of digital broadcasting, The content file at the time of broadcasting is managed by a program schedule table required for making a reservation for accumulation on the receiving side. The program schedule table includes a service ID for uniquely designating a service for broadcasting each content file, and a start time. , An event identifier that uniquely represents a broadcast duration and a content file, and content type information that represents a content type, and the event identifier is also described in header information of a data block that is broadcast in digital broadcasting, The program schedule table A storage reservation management table for generating and storing a storage reservation management table for content file identified by the event identifier by adding content type information, and storage reservation management table by the storage reservation management table Content storage reservation control means for controlling the start of storage reservation at the start time, and storage of the content reserved for storage at the start time according to a combination of the header information and the content type information. Content storage execution means that executes in units of carousel data blocks,
The content accumulation execution means includes
When receiving content transmitted by real-time broadcasting, a predetermined service group identifier that groups real-time type broadcast as primary and download-type broadcast as secondary is received, and linked to the content transmitted by real-time broadcast. Means for determining the presence or absence of a content file to be transmitted;
When it is determined that the content file is present, automatic accumulation of the content file transmitted by the download broadcast of the service ID different from the content transmitted by the real-time broadcast is performed in accordance with the automatic download execution instruction set in the receiving device. It has the means to control, It is characterized by the above-mentioned.

  As a result, the receiving apparatus can automatically store content files by separate download broadcasting even for content during real-time broadcasting.

  In the receiving apparatus of the present invention, the secondary content file is electronic data (text, graphics, still image, audio signal, control information, PDF file, video file, etc.) associated with the video content transmitted by the primary. It is characterized by including.

  Accordingly, when the content at the time of real-time broadcasting is video content, the receiving device can select one or more of text, graphics, still images, audio signals, control information, PDF files, and video files associated with the video content. Content files can be automatically stored.

The program of the present invention, when receiving the contents of the real time broadcast in the broadcast wave of digital broadcasting, in the receiving apparatus for automatically storing the content file at the time of download broadcasting associated to the content, turn sets the 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, and the event identifier Is also described in header information of a data block broadcast by digital broadcasting, and the content identified by the event identifier is received by the computer constituting the storage control unit in the receiving device and the program schedule table is received. Preserve files A step of generating a storage reservation management table for adding content type information; and a step of controlling the start of storage reservation at the start time for the content defined to be reserved for storage in the storage reservation management table; Storing the content reserved for storage at the start time according to a combination of the header information and the content type information in units of carousel data blocks. The step of storing the content is to receive a predetermined service group identifier that groups the real-time broadcast as primary and the download-type broadcast as secondary when receiving the content transmitted by the real-time broadcast, and transmits the content transmitted by the real-time broadcast. Linked to Determining whether or not there is a content file to be transmitted by broadcast, and content to be transmitted by real-time broadcast according to ON / OFF of automatic download execution set in the receiving device when determining the presence of the content file; Includes a step of controlling automatic accumulation of content files transmitted by download broadcasting of different service IDs.

  According to the present invention, the transmission device can perform download broadcasting of an arbitrary file that can be identified by the extended EIT or CST on the reception device side, and the reception device can realize the download reservation function and can efficiently receive power. It is possible to receive only an arbitrary file identified by the extended EIT or CST with a minimum, and further, it is possible to perform an accumulation operation according to the content type. Content can be automatically distributed for individually downloadable content, and the receiving device must check whether the content is downloadable and acquire the content file separately by download broadcasting. Automatic accumulation is possible without the need for bothersomeness. In the present invention, for downloadable contents, it is no longer necessary to transmit a carousel in a redundant manner for one or more rounds, and it is possible to eliminate the necessity of switching reception processing on the receiving apparatus side.

It is a schematic block diagram of the broadcasting system of one Example by this invention. (A), (b) is a conceptual diagram of a prior art, its subject, and the operation | movement which concerns on 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 a figure which shows the example which uses together CST and extended EIT which concern 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. (A), (b) is a figure which illustrates the aspect which delivers multiple item content sequentially in the broadcasting system of one Example by 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. 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 figure which illustrates the relationship of the download type broadcast content interlock | cooperated with the real-time type broadcast content received with the receiver of one Example which concerns on this invention. It is a figure which shows an example of the service group identifier which prescribes | regulates the grouping of the download type | mold broadcast content linked with the real-time type | mold broadcast content received with the receiver of one Example which concerns on this invention. It is a figure which illustrates the operation | movement flow at the time of receiving the download type broadcast content interlock | cooperated with a real-time type broadcast content in the receiver of one Example which concerns on this invention. It is a figure which illustrates the reception mode of the content at the time of the real-time broadcast in the conventional receiver. It is a figure which illustrates the reception mode of the content at the time of the real-time broadcast in the receiver of this invention.

  First, in order to help understanding of the present invention, an embodiment of a broadcasting system of a broadcasting service for distributing and receiving an arbitrary file according to the present invention will be described. From the description of the broadcasting system according to the present embodiment, the configurations of the transmission device and the reception device according to the present invention are also clarified.

[System configuration]
FIG. 1 is a schematic configuration diagram of a broadcasting system according to an embodiment of the present invention. The broadcasting station side transmitting apparatus 1 receives each data such as video data, audio data, data broadcasting data, and subtitle data of contents by digital broadcasting (in FIG. 1, in-vehicle / portable receiving terminal 2-1). , The mobile phone 2-2 is exemplified, but in the following description, it is a device that is distributed toward the “reception device 2” in general, and in particular, in the information of the broadcast SI constituting the EPG As a specific example, a new descriptor “file transmission identifier” and “content type information (content_type)” indicating the content type are added in the EIT to configure and transmit an “extended EIT”, or the content A content schedule that incorporates information necessary for content-oriented storage reservation (including reserved recording in the case of video, etc.) that enables creation of a content table for storage reservation Buru: a device for transmitting constituting the (CST composed table from below to Content_Schedule_Section). Details of “extended EIT” and “CST” will be described later.

  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. "Storage reservation management table" and "Storage content management table" for managing the presence / absence of storage of content files are generated, and distribution of content to be distributed is managed by user designation or based on automatic settings It is a device to do.

  First, in the conventional technology, download contents are distributed without being divided into content types, so that the processing load on the transmission side and the reception side is large. In particular, for content composed of a plurality of items even with the same service ID, each item content is transmitted by a separate carousel. In this case, at the time of carousel switching, the receiving device 2 switches the reception process, and in consideration of data loss at the time of switching, the transmitting device 1 transmits redundantly at least one carousel to be transmitted. It was necessary to do. Therefore, in the present invention, as will be described in detail later, a transmission system that enables accumulation control according to the content types of “single content”, “series content”, “overwrite update content”, and “multiple item content” is configured. For the content type of “multiple item content”, more efficient download distribution is realized.

  In order to help understanding of the present invention, FIG. 2 shows a conceptual diagram of the prior art, its problems, and the operation according to the present invention. FIG. 2A exemplifies a mode in which, for example, the program “always news”, “weather information”, and “always news” are sequentially distributed by EPG and ECG constituting the program schedule. “Anytime News” constitutes a multi-item content, and includes content files of the items “News A”, “News B”, “News C”, and “News D”. In this case, as shown in FIG. 2 (b), in the prior art, it is necessary to transmit the carousel for one or more rounds (for example, 1.5 carousel) on the transmission device side. This is because it is a broadcast content, so the receiving device side expects the program content to be missed. As a result, the broadcast time becomes long and inefficient.

  Therefore, in the method of the present invention, the content files of the items “news A”, “news B”, “news C”, and “news D” are multipartified and transmitted as one “multiple item content”. In this case, as a countermeasure against the loss on the receiving device 2 side, the transmitting device 1 describes the event identifier associated with the content type information in the header information (DII) when transmitting the content file of the multi-item content as the content type information. Information indicating the branch number and version for identifying the content of each item of the multi-item content is described in a predetermined storage resource list, and the information of the storage resource list and the content of each item are multipart. It is configured to transmit in the form of data blocks. As a result, the receiving device 2 acquires the event identifier associated with the content type information described in the header information when accumulating and controlling the content file of the multiple item content as the content type information, and associates it with the event identifier. All the data blocks obtained are temporarily stored, one module is constructed from the obtained data blocks, and the content of each item of the multi-item content is identified from the predetermined accumulation type resource list included in the constructed module The information indicating the branch number and version is extracted, and the content of each item to be stored is stored based on the extracted information indicating the branch number and version.

  Hereinafter, an embodiment of a broadcasting system of a broadcasting service that downloads and receives an arbitrary file according to the present invention will be described.

[Extended EIT]
As shown in FIG. 3, the “extended EIT” adds a “file transmission identifier”, which is a new descriptor, and “content type information (content_type)” indicating the content type in the existing EIT. Is configured.
As will be described in detail later, the “file transmission identifier (file_delivery_descriptor)” includes “file type information (file_type_value)” for identifying the contents of the content file on the receiving device 2 side, and is set by the standardization organization as necessary. “Descriptor tag information (descriptor_tag)” for specifying the organization that uses the file transmission identifier to be specified, “Identifier length (descriptor_length)” indicating the length of the file transmission identifier, and the content file “Encryption flag (encryption_flag)” for identifying whether or not the encryption has been performed, “Reserved (future_use)” for describing any information other than the above, and the standards set by the standards body "Data component" to identify the data structure (data component) of the content file to be associated with the file transmission identifier And a cement identifier (data_component_id) ". It should be noted that the “file transmission identifier (file_delivery_descriptor)” to be newly added to the existing EIT is preferably additionally described in the PMT, and in this case, the association with the 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 shown in FIG. 4A, “CST” is assigned to each content by “table identifier” indicating the type of CST, “transmission identification information” indicating transmission identification information (section information) of CST, and each content. An “event identifier (event_id)” representing a unique identifier, “file type information (file_type_value)” for identifying the content of the content file, “content type information (content_type_value1, content_type_value2, content_type_value3)” representing the content type, and , “File version number (file_version_number)” (which can be omitted if a file transmission identifier (file_delivery_descriptor) is transmitted), and “ broadcast_count (8bits) '', the broadcast start time, broadcast duration, and release of each content It consists of “broadcast time identification information” indicating the number of transmissions and “various descriptors” indicating the description contents of each content. The content schedule table (CST) is a copy of content that is the same number of descriptors as those used in EIT for a predetermined number of times of “broadcast time information” for a plurality of contents included in one CST. “Digital Control Descriptor” indicating control to be restricted, “Short Event Descriptor” indicating content title, “Content Descriptor” indicating program content, “Series Descriptor indicating genre and series program” 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.

  As shown in FIG. 4B, “CST [p / f]” is used in place of EIT [p / f], and the contents of the contents to be broadcasted now and next to the description contents of CST. It is configured to transmit the start time and broadcast duration of one broadcast. However, a file transmission identifier (file_delivery_descriptor) for identifying the contents of the content file can be added and transmitted in the description field of various descriptors. In this case, the description of “file version number (file_version_number)” is omitted. be able to.

  That is, “CST [p / f]” indicates whether the content file is updated or replaced on the receiving device 2 side, as shown in FIG. 4C. It can be confirmed by “file version number (file_version_number)” or can be confirmed from the contents of the file transmission identifier (file_delivery_descriptor).

  “File type information (file_type_value)” and “content type information (content_type_value1, content_type_value2, content_type_value3)” are used as values representing the type of content, and can be used as follows, for example.

(File, content type and file_type_value, content_type_value)
In addition to general content, content used in the download service includes content that is updated (news, etc.) and constantly updated content (traffic information, etc.), and information that supplements the content of these content Is also preferably present. Values identifying these file and content types are file_type_value and content_type_value. The file_type_value is a 16-bit value that can be managed by a public institution and disclosed to broadcasters, manufacturers, etc. In this example, there are three types of content_type_value, which are transmitted by extended EIT or CST. Configure.

For example, file type (file_type_value), content type (content_type_value1),
Tables 1 to 5 show examples of bit assignment and identification items of content type (content_type_value2) and main / supplement type (content_type_value3) of content, and identification contents. Table 1 shows the relationship between identification items corresponding to file_typ_value and content_type_value, Table 2 shows the correspondence between file_type_value and file type, and Table 3 shows the correspondence between content_type_value1 and content type. Table 4 shows the correspondence between content_type_value2 and the content update type, and Table 5 shows the correspondence between content_type_value3 and the main part / supplement type. Table 6 shows the relationship between the descriptor and the corresponding reception process.

  Note that “file version number (file_version_number)” notifies whether or not the content is changed with the content of the same event_id. When it is desired to reduce the reception processing of the extended EIT [p / f] or CST [p / f], only the value of the “file version number (file_version_number)” is referred to without describing the file transmission identifier (file_delivery_descriptor). Thus, the presence or absence of carousel reception can be determined, and it is also possible to know that there has been a change in a general program by describing it in the extended EIT or CST. In addition, when the “file version number (file_version_number)” is different from the previous time, the overwrite update content is also advantageous information for receiving the carousel and performing the overwrite update.

  On the other hand, the file transmission identifier (file_delivery_descriptor) can be inserted into the extended EIT [p / f] or CST [p / f] to identify the content file of each item in the multi-item content, and the p / f information At the time of acquisition, it becomes possible to grasp the update replacement information and the number of items for each item in the multi-item content. In the file transmission identifier (file_delivery_descriptor), the genre information for each item is described for the content of each item in the multi-item content, so that the receiving device 2 only needs to perform accumulation control for only desired genre information.

  On the receiving device 2 side, when the content file is updated or replaced by CST [p / f], the file information descriptor is changed from the file information descriptor (file_info_descriptor) described in the carousel DII. Confirm with reference to “descriptor tag (descriptor_tag)” and “descriptor length (descriptor_length)” indicating the presence, check the number of item content files included in the multiple item content with branch count information (branch_count), The genre information (for example, content_nibble_level1, content_nibble_level2) of each item content file can be grasped.

  When a file transmission identifier (file_delivery_descriptor) is described in “CST [p / f]”, a multi-item content is determined from the content file branch number (ex_event_id) and data event identifier (data_event_id) of the event identifier (event_id). Based on the content file of each item and its version information, it is possible to determine whether the content file has been updated or replaced.

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

  “Section_syntex_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)” defines 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 bits)” is a value for identifying this service from other services in the transport stream. That is, it is one piece of transmission identification information that represents a content channel (service ID) in CST.

  “Version_number (5 bits)” is one piece of transmission identification information indicating 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. When the sub-table is currently unusable and indicates that it will be valid next, it is “0”, which is one piece of transmission identification information indicating the serial number of the CST itself.

  “Section_number (8bits)” 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 representing the current section number in the CST.

  “Last_section_number (8 bits)” is the number of the last section of the subtable 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 indicating a TSID for transmitting a CST.

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

  “Segment_last_section_number (8 bits)” can divide the sub-table into a plurality of segments according to the number of contents, the broadcast start time, etc., and can 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 contents are divided into 10 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_length (8 bits)” represents the length of a unique identifier (event_id) assigned to each content.

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

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

  “Component_tag (8 bits)” is tag information indicating a data string to be multiplexed and transmitted for each event_id. In operation where only one data string is used in the service, component_tag can be omitted.

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

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

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

[Combination of CST and extended EIT]
FIG. 5 shows an example in which CST and extended EIT are used in combination. In this example, CST is used for the program schedule, and extended EIT [p / f] is used for the table acquired immediately before content storage. The CST shown in FIG. 5A is the same as that shown in FIG. The extended EIT [p / f] shown in FIG. 5B is obtained by adding a “file transmission identifier (file_delivery_descriptor)” to the existing EIT as shown in FIG. 5B. Even when configured as shown in FIG. 4, when a file transmission identifier (file_delivery_descriptor) is described in “CST [p / f]”, the branch number (ex_event_id) of the content file of the event identifier (event_id) and From the data event identifier (data_event_id), it is possible to grasp whether or not the content file is updated or replaced based on the content file of each item of the multi-item content and its version information.

  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 downloaded, 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.

  Here, the content of the real-time service will be described in detail. In the present invention, event_id is used for identifying a program in the real-time service, and an event_id branch number (ex_event_id) and data_event_id are used in addition to event_id in the download service. That is, in the download service, content is uniquely specified by event_id + ex_event_id + data_event_id. Table 7 shows the content identification information, number of bits, and identification contents of the download service.

  When downloading general content, it is possible to uniquely identify the content by specifying event_id. However, ex_event_id is used in addition to event_id when you want to uniquely identify an item in the content, such as a news program. It is done. For example, when event_id = “0x0001” is “national news”, the item “national news” can be uniquely specified by specifying ex_event_id.

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

  When identification of an item in content is necessary, the value of ex_event_id is always given, and when identification of an item in content is unnecessary, ex_event_id = “0xFFF” or ex_event_id is not used. The value of ex_event_id can be set to 12 bits, for example, and different items can be specified up to 4096 types (exactly 4095 types except 0xFFF).

  In the download service, content with the same content is transmitted multiple times, and can be used as a supplement for missing data on the receiving device 2 side. It is assumed that different contents are transmitted. In this case, if missing data is complemented in a state where the version change is not known to the receiving side, data such as video and audio in the changed portion becomes discontinuous, which hinders content viewing. Therefore, when sending contents of different versions, different data_event_id values are assigned, and version management on the receiving device 2 side is enabled.

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.
<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
... ... ...

  If it is necessary to identify the version of the content, the value of data_event_id must be assigned. If the identification of the version is not necessary, data_event_id = “0xF” or data_event_id may not be used.

  In download services, transmission is usually performed at a specified time and content is automatically stored in the receiving device. However, it is always transmitted like traffic information, and the latest information is received. A service that is always presented on the device is also assumed. In the case of such constantly updated content, a constant value is sent for event_id, ex_event_id indicates an item in the 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, the items of each prefecture of “traffic information” including the version can be uniquely specified.
<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.

  Even in constantly updated content, if the item in the content needs to be identified, the value of ex_event_id is always given, and if the item in the content is not necessary to be identified, ex_event_id = “0xFFF” or ex_event_id is used Can not be. In addition, when the content version needs to be identified, the value of data_event_id is always given, and when the version identification is not necessary, data_event_id = “0xF” or data_event_id may not be used.

  The receiving device 2 makes a download reservation by event_id or the like, and receives a file transmitted by the data carousel at the reserved time. If the download is not completed due to a packet being dropped during the download, it will transition to the download standby state again, wait for the reservation until the next date and time listed in the download broadcast schedule information, and when the broadcast time comes It becomes a download 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.

  The descriptors used in extended EIT in the download service are in addition to the short format event descriptor, content descriptor, digital copy control descriptor, audio component descriptor, data content descriptor, and staff descriptor used in the real-time service. It is preferable to use the aforementioned file transmission descriptor and the series descriptor for identifying the series program.

  As described above, event_id, file_type_value, and content_type_value are included in CST, and the transmission time including the re-transmission of content is described. In the extended 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, the amount of information to be retransmitted can be reduced as compared with the extended EIT, and the receiving apparatus can acquire schedule information for content storage including retransmission. It should be noted that the ex_event_id value and the data_event_id value that are most likely to be changed in the most recent transmission can be omitted from the CST.

  FIG. 6 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 encoding 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 content to be distributed by broadcast waves, and also generates a program schedule serving as basic data for making a storage reservation on the receiving side for content associated with “extended EIT” or “CST”. Configured as follows. “Extended EIT” is an existing EIT with a “file transmission identifier” added, and does not substantially increase the transmission capacity compared to the conventional EIT, and does not increase the burden of receiving or updating information about content. Reduce greatly. On the other hand, since “CST” transmits content-oriented program information, it is possible to easily configure a program schedule as basic data for making a content 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 content. In addition, when executing download linked to real-time broadcasting, the content organizing unit 10 transmits a content file transmitted by download broadcasting and content transmitted by real-time broadcasting in the same TS with different service IDs. In addition to sending out, the NIT has a function of transmitting a predetermined service group identifier (service_group_descriptor) for grouping a real-time broadcast as a primary and a download broadcast as a secondary (details will be described later).

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

  When the content transmitted through the content encoding unit 101 is transmitted by the carousel processing unit 11 by the carousel method, the control data generation unit 102 download ID (downloadID) in the DII message and “extended EIT” or “CST”. 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 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 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 an existing EIT used for storing content to be distributed by broadcast waves on the receiving device side, and “file type A “file transmission identifier (file_delivery_descriptor)” including “information (file_type_value)” is generated and added, and an extended EIT is formed and sent to the PSI / SI generation encoding unit 12 as EIT program information. The file transmission descriptor generation unit 1031 has a function of generating “file transmission identifier (file_delivery_descriptor)” including “file type information (file_type_value)” indicating the content type of the content file identified by the event identifier (event_id). . The EIT generating unit 103 is configured by incorporating the event identifier (event_id) obtained from the identifier numbering control unit 1021 into “CST” used for storing content to be distributed by broadcast waves on the receiving device side. The ESI program information can be sent to the PSI / SI generation encoding unit 12. 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, the content encoded by the content encoding unit 101, 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, in a channel (Ch) representing a service ID for content distribution, the content data is multiplexed so that it can be identified by component tags (component_tag: ESm to ESn), and the content data is associated with the extended EIT or CST. A plurality of contents can be obtained by switching the download data block (DDB) for each content identified by the event identifier (event_id) using the DII / DDB information extracted from the selected broadcast stream. Note that the content can also be transmitted by constituting one or a plurality of modules.

  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 data packet at the time of broadcasting of each content, a start time, 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.

  As described above, the broadcasting station-side transmission device 1 transmits the extended EIT at a constant frequency, and transmits the 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 rebroadcasts each content in a data block associated with an event identifier (event_id) associated with a download ID (downloadID) according to the extended EIT or CST. The receiving apparatus 2 can know the number and period of rebroadcast from the extended EIT or CST.

  FIG. 7 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, an audio / decoder 22, a video / decoder 23, a caption / decoder 24, a carousel processor 25, and a BML. A browser 26, a presentation processing unit 27, an SI processing unit 28, a content storage reservation control unit 29, a content storage unit 30, a stored content list display / playback instruction unit 31, and a user I / F unit 32 are provided. .

  The OFDM demodulator 20 demodulates 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 corresponding audio / decoding unit 22, video / decoding unit 23, subtitle / decoding unit 24, and carousel processing unit 25. The audio / decoding unit 22, the video / decoding unit 23, and the subtitle / decoding unit 24 each have a function of decoding the audio, video, and subtitles that organize the content, and sending them to the presentation processing unit 27. The carousel processing unit 25 In addition, it has a function of decoding data broadcast data for organizing contents while performing carousel processing according to a carousel system corresponding to the transmission side, and sending the decoded data to the BML browser 26. The decoded data for data broadcasting is converted according to the drawing method defined by the BML browser 26 and sent to the presentation processing unit 27. The presentation processing unit 27 has a function of presenting audio, video, captions, and other data for organizing content on an external device (for example, a display device or a speaker).

  However, the carousel processing unit 25 controls the acquisition and storage of content data corresponding to the extended EIT 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 Store in the content storage unit 30. The content data stored in the content storage unit 30 is managed by the content storage reservation control unit 29. The content storage reservation control unit 29 performs overwriting update or replacement of content acquired in units of data blocks according to the extended EIT or CST. Store and update the “storage reservation management table” for managing the storage reservation of content files used for storage reservation control and the “storage content management table” for managing the presence / absence of storage of content files in the content storage unit 30. It has a function.

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

  The “storage reservation management table” is used as an EPG that can specify the broadcast time, title, series, and genre for each content according to the broadcast time axis (see FIG. 13). Further, the “accumulated content management table” is configured in a manner capable of managing whether or not each content has been accumulated and whether or not there is an unstored DDB (see FIG. 14).

  The SI processing unit 28 inputs the extended EIT or CST data and uniquely represents the EIT information of the broadcast content for each channel, the data packet at the time of broadcasting each content, the start time, the broadcast duration, and the content file. PSI / SI information (that is, EIT program information) including “event identifier” is sent to the content storage reservation control unit 29.

  Although details of the content storage reservation control unit 29 will be described later, the content storage reservation control unit 29 has a function of controlling the storage reservation operation of the content specified by the user in the “storage reservation management table”. For example, the content storage reservation control unit 29 generates a “storage reservation management table” in order to manage the storage reservation state of the specified content, and performs marking indicating whether or not each content is waiting for storage reservation. Thus, control of content storage reservation can be managed. In addition, the content storage reservation control unit 29 receives a predetermined service group identifier that groups real-time broadcast as primary and download-type broadcast as secondary when receiving content transmitted by real-time broadcast, and transmits it by the real-time broadcast. In accordance with the automatic download execution instruction set in the receiving device 2 when it is determined whether or not there is a content file that is transmitted in a download broadcast that is linked to the downloaded content, It functions as a content storage execution means for controlling automatic storage of content files transmitted by download broadcasting with a service ID different from the content to be transmitted.

  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. 8 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 device 1 will be described. The broadcast station side transmission device 1 is configured to transmit EIT program information (in this example, EITschedule or CST included in 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 / extended EIT-p / f) including whether or not the program information to be broadcast time-organized according to the extended EIT or CST is changed is distributed (step S4). Here, unlike what is re-requested and re-transmitted of content by bidirectional communication such as general network communication, since it is a broadcast content, assuming a reception failure on the receiving device side in advance, The control data generation unit 102 included in the broadcasting station-side transmission device 1 uses the carousel method (see FIG. 9) for content data managed by an event identifier (event_id) according to the extended EIT or CST according to a predetermined period and number of times according to the extended EIT or CST. ) And retransmit (steps S5 and S6).

  For example, the broadcast station side transmission device 1 is linked to a main channel (main ch1) for transmitting real-time broadcast program content in time organization within 1 TS (1 segment or 3 segment broadcast), and the main ch1 program content. An arbitrary file (for example, moving image file, PDF, TS file, 3GPP, etc.) is multiplexed and transmitted, and the original channel (original ch1) used uniquely by the content provider is not linked to the main ch1 program content. Content of 3 channels of the second unique channel (unique ch2) uniquely used by the content provider, which multiplexes and transmits independent arbitrary files (for example, traffic information that requires real-time update) Can be multiplexed.

  The contents of these main ch1, original ch1 and original ch2 are not only identified by the service ID (serviceID) from the EIT program information (extended EIT or CST), but also the events in the time axis direction. The content file type identified by the identifier (event_id) and identified by the event identifier (event_id) can be identified by the “file type information (file_type_value)” in the “file transmission identifier (file_delivery_descriptor)” The EPG can be configured immediately.

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

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

  The receiving device 2 receives the EIT program information, decodes the extended EIT, grasps the contents of each channel of the main ch1, the original ch1, and the original ch2 with the service type as the service ID, and organizes the time axis direction in each channel. The content file content type identified by the event identifier (event_id) is identified by the “file type information (file_type_value)” in the “file transmission identifier (file_delivery_descriptor)”. Thus, it is determined whether or not the content in the extended EIT or CST is a file that can be stored as a content file, and it is determined whether or not it is a file that is overwritten and stored with content type information (content_type) (steps S11 to S13). .

  Subsequently, the receiving device 2 specifies the broadcast time, title, series, and genre for each content according to the time axis that is broadcast for the storable file, generates a “storage reservation management table” to be used as an EPG, and receives it. It can be presented to the user of the device 2 (step S14). The receiving device 2 sets and registers the content designated by the user in the “storage reservation management table” as a storage reservation, starts the storage reservation immediately before the broadcast time, and broadcasts time-organized according to the extended EIT or CST The current program and the next program (CST / extended EIT-p / f) including whether the program has been 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 content according to 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 (event_id) described in the DII The content file to be downloaded is specified together with the content type by the download ID (downloadID) associated with ()), the data block (DDB) string in the corresponding module is received, and the content is stored (step S16). When the corresponding content is module-linked, the data block (DDB) sequence in the corresponding plurality of modules is received and stored. Note that the receiving device 2 receives and executes the storage operation if the content reserved for storage is being broadcast according to the broadcast start time (start_time), and the content reserved for storage is outside the broadcast start time (start_time). If it is not being broadcast), it will be registered in the storage reservation management table and will wait until the broadcast time. Even if all the data constituting the content cannot be received at one time due to reception failure, the content is transmitted in units of DDB, so if it can be reacquired within the number of times of carousel transmitted by the carousel method The data can be stored in units of DDBs that have failed to be received, and can be acquired at the time of re-broadcasting if reception fails within the number of carousels. 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 content that has been stored, and registers it in the stored content management table to manage the storage status. For example, when content storage is completed, the content is registered in the stored content management table, and the marking is deleted from the storage reservation management table so that re-acquisition during re-broadcasting 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, when content that belongs to the same series as overwrite update content has already been accumulated, overwrite update is performed, and otherwise, it is accumulated as it is.

  The receiving apparatus 2 preferably creates a list of contents accumulated by series and genre (accumulated content management table) so that it can be presented to the user (step S19). The user can also delete unnecessary content from the stored content management table by a predetermined operation. A series of content with a short broadcast interval can be configured to be deleted from the oldest. (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 contents in a pattern in units of series or categories.

  The receiving device 2 can reproduce the accumulated content designated by the user (step S20). For example, when the receiving device 2 is configured by a mobile phone, information can be obtained by specifying a plurality of contents included in the title of the content displayed on the screen via the user interface. When video, audio, data broadcast, and caption data are associated with the content, the data can be reproduced. For example, for content data broadcasting, a thumbnail image of the content can be transmitted and used when displaying the storage reservation content table 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 storage reservation control management with this storage reservation management table, receives content, and automatically stores it To do. In particular, when the receiving apparatus 2 is a mobile receiving apparatus (for example, a mobile phone), the timing of rebroadcasting from the broadcasting station side transmitting apparatus 1 even when the content cannot be completely received and stored by one carousel method. The storage operation can be automatically performed again.

  For example, FIG. 10A exemplifies a mode in which, for example, the program “always news”, “weather information”, and “always news” are sequentially distributed by EPG and ECG constituting the program schedule. In the extended EIT or CST, the receiving apparatus 2 can construct an EPG or an ECG in order to transmit a program schedule indicating that a plurality of items of content that are content information of “always news” is transmitted. The transmission apparatus 1 according to the present invention can transmit a program schedule table (extended EIT or CST) and can also transmit an extended EIT or CST [p / f]. Further, in the case of delivery of a plurality of item contents, the transmission apparatus 1 according to the present invention, as shown in FIG. 10B, the event identifier described in the download ID in the header information (DII) constituting the header part. This is a data block in which the branch number (ex_event_id) and version information (data_event_id) are also described in the "storage type resource list", and the information of the storage type resource list and the contents of each item of multi-item content are multipartified. Send. The information of the accumulation type resource list and the contents of each item (“news A”, “news B”, “news C”, and “news D”) that are made into a multipart are transmitted as one module. That is, in order to divide and transmit one module into a plurality of parts, the receiving device 2 side first grasps the event identifier from DII when receiving and storing the content of each item of the multi-item content, All data blocks associated with the event identifier are acquired, one module is constructed from the acquired data blocks, and the content of each item of the multi-item content is obtained from a predetermined accumulation type resource list included in the constructed module. Information indicating the branch number and version for identification is extracted, and the contents (“news A”, “news B”, “news C” and “news” of each item based on the extracted information indicating the branch number and version are extracted. D ") is stored. A resource header is provided for each resource, and a number associated with descriptor tag information (descriptor_tag) in the “storage type resource list” is described. The reception device 2 can grasp the genre of each item content when the content nibble level 1 (Content_nibble_level1) and the content nibble level 2 (content_nibble_level2) are included as genre information or hierarchical genre information.

  Here, the configuration and operation of the content storage reservation control unit 29 will be described in more detail with reference to FIGS. 11 and 12.

  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” that uniquely represents the start time of each content, the broadcast duration, and the content file from the input PSI / SI information (ie, EIT program information), and performs CST / EIT. The information is sent to the information management unit 2903.

  The CST / EIT information management unit 2903 causes the storage reservation management table generation unit 2909 to function based on the content schedule information of the extended EIT or CST, generates a storage reservation management table, and stores the content file. In accordance with an instruction from the storage reservation control unit 2904, a function for storing the file, a function for determining 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 the storage reservation management table for content files to be reserved for storage, a function for causing the event identifier determination processing unit 2906 to function and determining information (event identifier, branch number, data event identifier) in the DII, and a difference The DDB determination processing unit 2907 functions to transmit with multiple DDBs. Function to determine and accumulate DDB of unaccumulated difference for content file to be acquired, CST / extended EIT-p / f, check whether reservation information has been changed, and update accumulated reservation management table if there is a change It has the function to do.

  The storage reservation control unit 2904 has a function of instructing the CST / EIT information management unit 2903 to control the storage reservation of the 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) in the “file transmission identifier (file_delivery_descriptor)” Functions identified by “file type information (file_type_value)”, “content type information (content_type)” representing content type, “event identifier (event_id)”, “series descriptor (series_id)” as content information, And a function for 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 or not the content is overwrite update content from the content type information (content_type). If the content belongs to the same series in the case of the overwrite accumulation content, the overwrite accumulation is performed. If there is no content belonging to the same series stored, 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 processing unit 25 for the content file to be reserved for storage, extracts the download ID (downloadID), and sends it to the event identifier determination processing unit 2906 and the differential DDB determination processing unit 2907. And a function for sending a control signal to the carousel processing 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. Also, the download ID determination processing unit 2908 performs a carousel process on the control signal to control the acquisition and storage of unstored differential DDBs for content files transmitted by a plurality of DDBs in response to an instruction from the differential DDB determination processing unit 2907. A function of sending to the unit 25;

  The storage reservation management table generation unit 2909 has a function of generating a storage reservation management table based on the 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 generation unit 2910 has a function of generating a stored content management table for managing content stored in accordance with the storage reservation management table under the control of the CST / EIT information management unit 2903.

  FIG. 12 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 contents of each channel of the main ch1, the original ch1, and the original ch2 for each content file that can be reserved for storage, with the channel type as the service ID. The organization of the time axis direction is identified by the event identifier (event_id), and the content file content type identified by the event identifier (event_id) is set to “file type information (file_type_value) in“ file transmission identifier (file_delivery_descriptor) ” ) ”, And the storage reservation management table generation unit 2909 generates the storage reservation management table and presents it to the user. When the reservation setting by the user or the generation of the storage reservation management table is generated, the corresponding file is automatically reserved. Setting is performed (steps S33 and S34). .

  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). 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 there is accumulated 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 do or replace (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 identifier (file_delivery_descriptor)” Function identified by “type information (file_type_value)”, “content type information (content_type)” representing the content type, “event identifier (event_id)”, and “series descriptor (series_id) for identifying the content information of the series program ) '' 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). If the content type of the content file identified by the file type information is a scheduled download broadcast of the same content file among the time-organized content files, the event identifier (event_id) of CST or extended EIT is set. By associating with the download ID (downloadID) in the carousel DII, the DDB is specified for each event identifier (event_id) of the CST or extended EIT, and the same file name is overwritten and accumulated. DDB reception can be performed.

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

  Therefore, the content storage reservation control unit 29 acquires the content of “main broadcast (first broadcast)” transmitted by the carousel transmission method and performs the carousel transmission when executing the storage reservation of the content designated by the user. The acquisition of the content of “rebroadcast (the second and subsequent broadcasts)” transmitted by the method can not only control the operation of the storage reservation, but also “content type information (content_type)” representing the content type, By combining the “event identifier (event_id)” and the “series descriptor (series_id)” as content information, reservation accumulation control for each content type can be performed.

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

  In this way, the receiving device 2 can acquire information necessary for content storage reservation (including reserved recording in the case of video or the like) from the extended EIT or CST. “File transmission identifier (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 the “file transmission identifier (file_delivery_descriptor)”, and content storage reservation is made. You can immediately create a storage reservation management table for the content and get the content immediately. For this reason, it is possible to reduce the burden of reception processing of the receiving device 2 and reduce the risk of reception failure, and acquire only the DDB that has not been acquired due to reception failure and complete the reception of the content file.

  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, the receiving device 2 acquires the information of the extended EIT or CST in advance for use in the storage reservation, and the time information actually downloaded and broadcast described in the extended EIT or CST or “file Since the file information and event identifier are identified from the `` transmission identifier '', it is determined whether the file to be downloaded is supported based on these information, and further, the storage reservation according to the content type is performed. It becomes possible to reserve an efficient download broadcast.

  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 download a file by acquiring only the differential DDB in the repeatedly transmitted data carousel.

  Hereinafter, a difference from the prior art will be described by showing a more specific example regarding download linked to real-time broadcasting. Several modes are conceivable for the manner of download processing on the receiving device side.

(Mode by download reservation from EPG)
As in the prior art, when the EPG is activated in the receiving device 2 by a button operation or the like by the user, an EPG that can be reserved for content download is generated by SI transmitted by broadcast waves. When a list of contents that can be reserved is displayed and the user selects the contents, the EPG passes information for download control to the downloader. The downloader analyzes the download control information and waits until the described broadcast schedule arrives.

(Mode by download reservation from BML Browser)
As is conventionally known, when the BML browser is activated in the receiving device 2 by a button operation or the like by the user, the BML content acquired from the data carousel is presented, and the function of searching for the content is provided by the BML content. As a result of the search by the user, when download execution is instructed for the selected content, information for download control is passed to the downloader. The downloader analyzes the download control information and waits until the described broadcast schedule arrives.

(Aspect by downloading reservation from communication browser)
As is conventionally known, when a communication browser is activated on the receiving device 2 (a receiving device equipped with a network communication function) by a button operation or the like by a user, it is possible to make a reservation for downloading content based on information transmitted by communication. A screen is generated. A list of contents that can be reserved is displayed, and when the user selects contents, information for controlling download is passed to the downloader. The downloader analyzes the download control information and waits until the described broadcast schedule arrives.

(Aspect by acquiring information for downloading)
Like the receiving device 2 according to the present invention, information for downloading content is acquired from broadcast waves by SI processing. Information to be acquired can be a method using an extended EIT based on a current event information table EIT (Event Information Table) and a method using a content schedule table CST (Contents Schedule Table).

(Download linked to real-time broadcasting)
As in the case of the receiving device 2 according to the present invention, when downloading of content linked to real-time broadcasting is selected by the receiving device 2 by a button operation or the like by the user, the content is downloaded in the background when the user watches the real-time broadcasting. Done automatically.

  More specifically, for download reservations, there are reservations by EPG generated by extended EIT and CST, reservations by BML content, reservations by screens generated by information acquired by communication, etc. In addition to advance reservations, downloads linked to real-time broadcasting are also possible.

  When downloading content linked to real-time broadcasting, the content is automatically downloaded in the background when the user views the real-time broadcast. An example of the relationship between download-type broadcast content linked to real-time-type broadcast content is shown in FIG.

  As shown in FIG. 15, the real-time broadcast content and the linked download content are transmitted in the same TS and transmitted with different service IDs. Each service is grouped by a service group identifier (service_group_descriptor), and the real-time type is primary and the download type is secondary.

  FIG. 16 shows the service group identifier (service_group_descriptor). The service group type (service_group_type) in the service group identifier uses a value (for example, “0x2”) indicating linkage in multimedia broadcasting, the primary_service_id is a real-time broadcasting service ID, and the secondary_service_id is linked downloading type broadcasting. The service ID is used. This service group identifier can be transmitted in NIT (Network Information Table, for example, second loop).

  It is assumed that one secondary service is grouped for one primary service, and two or more linked download-type contents are not sent out at the same time for one real-time type content. For example, in the case of the example shown in FIG. 15, linked content (linked-1) and (linked-1) are transmitted twice at different times for real-time type content (1). In addition, as with the real-time type content (3), linked download type content may not be transmitted.

  The event_id value of real-time type content and the event_id value of linked download type content are independent, and there is no association information between events. Therefore, after the NIT confirms whether the service ID linked to the service ID of the real-time broadcast is present in the reception device 2, if there is a linked service ID, the secondary extended EIT [p / f] (or CST) ), The presence / absence of linked content is confirmed, and if linked content exists, download is performed.

  An example of the operation of the receiving device 2 is shown in FIG. Note that FIG. 17 is merely an example of operation, and does not restrict the operation of the receiving apparatus. In FIG. 17, the receiving apparatus 2 performs a standby process for a predetermined time (assuming about 1 minute) after the channel selection process of the real-time channel by the OFDM demodulator 20, and frequently switches the channel (such as zapping). ) (Steps S101 to S103). In the receiving apparatus 2, the SI processing unit 28 determines whether or not there is a secondary service by determining whether or not there is a service ID that is linked to the service ID of the real-time broadcasting (step S105). If it is determined that there is broadcast), the content storage reservation control unit 29 acquires and confirms the corresponding extended EIT [p / f] (step S106), confirms the presence or absence of linked content (step S107), According to ON / OFF of automatic download execution set by the user, downloading is performed when linked content exists (steps S108, S109, S110, S112). In addition, it is assumed that the automatic download execution ON / OFF is set by the user for each real-time channel, but the mounting method is appropriately determined. If channel switching is detected by the OFDM demodulator 20 during the download (step S111), it is possible to confirm whether or not the download is continued and to execute the accumulation control during the download (step S111). , S113 to S115).

  When a real-time channel is changed during execution of automatic download in the background, it is desirable to confirm whether or not to interrupt the download before switching the channel.

In addition, handling of event_id, ex_event_id, and data_event_id of linked download content is the same for non-linked and file_type_value and content_type_value are also handled for unlinked, but for constantly updated content (contetn_type_value2 = '0x2') Shall be sent only. Similarly to the case of the non-linked download content, the linked EIT and CST are transmitted as the linked download content, and the download can be reserved in advance from the EPG or the like.
It is also possible to prepare a new type for content_type_value3 so that the linked download content cannot be downloaded from the EPG or the like on the broadcast station side. Specifically, the extended EIT or CST is transmitted with content_type_value3 = 0x2, and the receiving device does not display this content on the EPG or the like, and does not include it in the content search result in the receiving device. Prevent downloads.

  Moreover, about the supplementary information mentioned above, the aspect transmitted as information which supplements real-time content as download content linked with real-time type broadcasting is also considered. In this case, the supplementary information is transmitted using a secondary service ID that is a combination of real-time broadcasting and a service group. The information to be sent is limited to information relating to real-time content sent at the same time, and the same content is repeatedly sent by carousel transmission.

  As described above, in the case of real-time broadcasting, download_id embeds the value of data_event_id in 28 bits to 31 bits, but all other bits are not used with “1”. In the case of download broadcasting, in addition to data_event_id, event_id is embedded from 0 bit to 15 bit, and ex_event_id is embedded from 16 bit to 27 bit. Since the download_id having the same value as DII is described in the header part of each DDB message, the DDB block can be uniquely identified for each event_id and ex_event_id, and differential reception is possible. In addition, by using 4 bits of data_event_id as update information, it is possible to manage the version of the downloaded content.

  For example, in the receiving device 2 that always receives the latest information such as traffic information, the update information of the downloaded file is always monitored, and when the information is updated, the accumulated reception is performed and the information is overwritten and updated. There is a need. In the download service, by using 4 bits of data_event_id embedded in the download_id of DII or DDB as update information, the receiving device 2 can update the file by overwriting. For supplementary information, download_id is a fixed value, and differential reception is not performed.

  On the other hand, in the download service, in order to make it possible to complement missing data on the receiving side, it is assumed that the same content will be transmitted continuously or multiple times after a certain period of time, and the same event_id will be at different times A case will be sent out. Moreover, the case where the content in which an item is updated using the same event_id (ex_event_id is updated), such as news, or the content that is constantly updated, such as traffic information, is also assumed. Further, since the value of event_id is described in a CST required for download reservation after a predetermined date (for example, 8 days before) the first transmission start time, the content can be uniquely identified for a certain period. Therefore, the value of event_id needs to be kept unique except in the case of retransmission, item update, constant update, and transmission of supplementary information.

  Therefore, as shown in Table 8, the case where the same event_id is used in general content is limited to the case of retransmission of the same content (including retransmission of content with different data_event_id values).

  Compared with the prior art as a specific effect in downloading linked to real-time broadcasting of the present invention, for example, in the conventional mode shown in FIG. It is transmitted by PES, and the receiving side displays subtitles in conjunction with video and audio. In this case, if you want to know information only for subtitles that cannot efficiently receive information only for subtitles, or if you want to store the content of the real-time broadcast, you can use EPG storage reservation to acquire the entire content file. Accumulation based was necessary.

  On the other hand, as shown in FIG. 19, in the download linked to the real-time broadcast according to the present invention, for example, subtitles are converted into text information and transmitted as supplemental information as content linked to the real-time broadcast. Since the amount of information is small, it is possible to retransmit the supplemental information of the same content many times within the time of the program, and it is possible to prevent the loss of reception at the time of poor reception and solve the conventional problem. Furthermore, by automatically accumulating download broadcast content linked to real-time broadcast content as a video file, PDF file or commercial information file of the real-time broadcast content itself, along with viewing of the real-time broadcast content, Since it is possible to eliminate the need for a user operation to perform download storage in a hurry, it can be used for various purposes.

  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, in both the real-time broadcast and the download broadcast, the re-accumulation operation is automatically performed even when the reception device is in an unstable environment (for example, when the user is on the subway). Since a mechanism for performing the operation is provided, stable content accumulation can be realized. Therefore, the present invention is particularly useful for obtaining digital broadcast content reserved for accumulation 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 Voice | voice decoding part 23 Video / decoding unit 24 Subtitle / decoding unit 25 Carousel processing unit 26 BML browser 27 Presentation processing unit 28 SI processing unit 29 Content storage reservation control unit 30 Content storage unit 31 Stored content list display / playback instruction unit 32 User I / F unit 101 Content encoding 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 generation unit 2910 Storage content management table generation unit

Claims (5)

A transmission device that transmits a content file associated with a content at the time of a real-time broadcast by a broadcast wave of a digital broadcast by download broadcasting,
Generate a program schedule table including a service ID that uniquely specifies a service that broadcasts each content file, a start time, a broadcast duration, an event identifier that uniquely identifies the content file, and content type information that represents the content type Program schedule table generating means for performing,
Program schedule table transmission means for transmitting the program schedule table at predetermined intervals;
Content file transmission means for transmitting a content file having an event identifier associated in the program schedule table in a data block by a carousel method;
A predetermined service for grouping the content file transmitted by the download broadcast and the content transmitted by the real-time broadcast in the same TS with different service IDs, and grouping the real-time broadcast as primary and the download broadcast as secondary Content organization means for transmitting the group identifier;
A transmission device comprising:   The transmission apparatus according to claim 1, wherein the secondary content file includes electronic data associated with video content transmitted by the primary. When receiving content at the time of real-time broadcasting with a broadcast wave of digital broadcasting, a receiving device that automatically stores a content file at the time of download broadcasting associated with the content,
The content file at the time of the download broadcast is managed by a program schedule table required for making a storage reservation on the receiving side, and the program schedule table includes a service ID for uniquely designating a service for broadcasting each content file; Including an event identifier that uniquely represents a start time, a broadcast duration, and a content file, and content type information that represents a content type, and the event identifier is also described in header information of a data block broadcast by digital broadcasting And
A storage reservation management table generating means for receiving the program schedule table and generating a storage reservation management table for storing and reserving a content file identified by the event identifier by adding content type information;
Content storage reservation control means for controlling the start of storage reservation at the start time for the content specified to be stored in the storage reservation management table;
Content accumulation execution means for executing accumulation of content reserved for accumulation at the start time in units of data blocks of a carousel method according to a combination of the header information and the content type information;
The content accumulation execution means includes
When receiving content transmitted by real-time broadcasting, a predetermined service group identifier that groups real-time type broadcast as primary and download-type broadcast as secondary is received, and linked to the content transmitted by real-time broadcast. Means for determining the presence or absence of a content file to be transmitted;
When it is determined that the content file is present, automatic accumulation of the content file transmitted by the download broadcast of the service ID different from the content transmitted by the real-time broadcast is performed in accordance with the automatic download execution instruction set in the receiving device. A receiving device comprising means for controlling.   The receiving apparatus according to claim 3, wherein the secondary content file includes electronic data associated with video content transmitted by the primary. When receiving the contents of the real time broadcast in the broadcast wave of digital broadcasting, the content files when downloading broadcast associated with the content in the receiving apparatus for automatic storage, the turn sets the schedule table, which broadcasts each content file It includes a service ID that uniquely specifies a service, 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, and the event identifier is broadcast by digital broadcasting. It is also described in the header information of the data block, in the computer constituting the storage control unit in the receiving device,
Receiving the program schedule table and generating a storage reservation management table for storing and reserving a content file identified by the event identifier by adding content type information; and
Controlling the start of storage reservation at the start time for the content specified to be stored in the storage reservation management table;
Executing the storage of content reserved for storage at the start time in units of data blocks in a carousel method according to the combination of the header information and the content type information.
The step of accumulating the content is to receive a predetermined service group identifier that groups real-time broadcast as primary and download-type broadcast as secondary when receiving content transmitted by real-time broadcast, and is transmitted by real-time broadcast. Determining whether or not there is a content file transmitted in a download broadcast that is linked to the downloaded content;
When it is determined that the content file is present, according to ON / OFF of automatic download execution set in the receiving device, the content file automatically transmitted by the download broadcast having a service ID different from the content transmitted by the real-time broadcast Controlling the accumulation.

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