JP2012085117A - Broadcast service transmitter and receiver, and program of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmitter which, when transmitting a content file by digital broadcast waves, processes supplementary information associated with the content file, and to provide a receiver and a program.SOLUTION: The transmitter is provided with: program schedule table generation means which generates a program schedule table; program schedule table transmission means which transmits the program schedule table at predetermined intervals; and content file transmission means which transmits a content file having an event identifier associated in the program schedule table in a data block by the carousel method. The content file transmission means has means which identifies content type information expressing supplementary information and transmits the supplementary information associated with the content file within the same TS in an accumulable and reservable manner.

Description

  TECHNICAL FIELD 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. The present invention relates to a broadcasting service transmitting apparatus, a receiving apparatus, and a program thereof.

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

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

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

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

  That is, in 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 accumulating content) 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. Furthermore, along with the distribution of the video / audio (movie) download file of this volume, when transmitting information such as subtitles related to the download file, it is not possible to efficiently transmit or receive subtitle-only information In addition, even when it is desired to know only the subtitle information, it is necessary to simultaneously receive and record video and audio. Normally, if there is only subtitle information with a small amount of information, subtitle information must be kept stable during the program length period even though transmission or reception is possible in a very short time with respect to the program length. It is possible that a part of the information is lost and all information cannot be obtained. In this case, there is a problem that subtitle information is retransmitted and “rebroadcasting” of the program length is necessary to compensate for missing information.

  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, on the transmission device side, a new file descriptor “file transmission identifier” (file # delivery # descriptor) is added to EIT as a specific example in the broadcast SI information constituting the EPG. Necessary for the mode of transmission in the form of "extended EIT" (described later) and content-oriented storage reservation (including reservation recording in the case of video, etc.) that enables creation of a content table for content storage reservation It is assumed that a content schedule table incorporating information (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. A unique identifier (event # id) and a descriptor representing the description content of each content. Therefore, a content table for receiving and accumulating the content associated with the CST is received. Content that is generated and reserved for storage reservation in the content table can be executed in units of data blocks in which the storage reservation is transmitted by the carousel method at the start time.

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. 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 depending on 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. , "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" is transmitted in the fifth carousel. 2 "can be transmitted. “Multi-item content” is transmitted in different carousels, for example, within the broadcast time described in the CST.

  The “replacement function” refers to, 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, It is possible to download broadcast waves while reducing the power consumption of the receiving device, and in addition to the transmission of video / audio (movie) download files of this volume, when transmitting information such as subtitles related to the download file `` By transmitting “supplemental information”, it is possible to efficiently transmit or receive information of only captions.

  That is, the transmission device according to the present invention is a transmission device that transmits supplementary information associated with a content file when transmitting the content file by a broadcast wave of digital broadcasting, and uniquely transmits a service for broadcasting each content file. Including a service ID to be designated, 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 that enables the supplemental information to be identified separately from the content file. A program schedule table generating means for generating a program schedule table, a program schedule table transmitting means for transmitting the program schedule table at predetermined intervals, and a content file having an event identifier associated in the program schedule table in a data block Content file transmission means for transmitting in accordance with the Lucer method, and the content file transmission means controls the combination of the header information and the content type information so as to perform a storage operation according to the content type on the receiving side. A means for transmitting a content file, and further describing content type information representing the supplementary information in the program schedule table when transmitting supplementary information associated with the content file separately from the content file And a means for transmitting in association with the content file in the same TS.

  Thereby, for example, along with the distribution of the download file of video / audio (movie sound) of the main part, when transmitting information such as captions related to the download file, on the receiving device side, It is possible to efficiently receive only subtitle information.

  Further, in the transmission device according to the present invention, the content file transmission means assigns a fixed event identifier different from the content file when transmitting the supplement information associated with the content file, and It has the means to transmit, It is characterized by the above-mentioned.

  As a result, for example, with the delivery of a plurality of video / audio (movie) download files of main content, by transmitting “supplemental information” such as subtitles related to one download file, only the subtitles are received on the receiving device side. Can be efficiently received.

  A receiving apparatus according to the present invention is a receiving apparatus that receives supplementary information associated with a content file when receiving the content file by a broadcast wave of digital broadcasting, and the program schedule table relating to the content file includes each content A service ID that uniquely designates a service that broadcasts a file, an event identifier that uniquely indicates a start time, a broadcast duration, and a content file, and a content type that makes it possible to identify the supplemental information separately from the content file The event identifier is also described in header information of a data block broadcast by digital broadcasting, receives the program schedule table, and stores a content file identified by the event identifier To make a reservation Storage reservation management table generating means for generating a storage reservation management table by adding content type information, and controlling the start of storage reservation at the start time for the contents defined to be stored and reserved in the storage reservation management table Content storage reservation control means, and content storage execution means for executing storage of contents reserved for storage at the start time in units of carousel data blocks according to the combination of the header information and the content type information, The content accumulation execution means has means for executing accumulation control according to the content type from a combination of the header information and the content type information. Further, supplemental information associated with the content file is defined as the content file. When receiving separately, in the program schedule table It identifies the content type information representing the supplemental information above, in the accumulation reservation possible embodiment, and having a means for receiving the supplementary information associated with the content file in the same TS.

  As a result, for example, along with the reception of the video / audio (movie) download file of the main part, it is possible to receive “supplemental information” that is information such as subtitles related to the download file, so that only subtitle information can be efficiently transmitted. Can be received.

  Further, in the receiving apparatus according to the present invention, when the content accumulation executing means receives the supplemental information associated with the content file, the content storage executing unit displays the supplemental information to which a fixed event identifier different from the content file is assigned. It has the means to receive, It is characterized by the above-mentioned.

  As a result, for example, with the reception of a plurality of video / audio (movie) download files of the main part, it is possible to receive “supplemental information” that is information such as subtitles related to one download file, and only subtitles can be received. Information can be received efficiently.

  In addition, the program according to the present invention is a receiving device that receives supplementary information associated with a content file when the content file is received by a broadcast wave of digital broadcasting. A service ID that uniquely designates a service that broadcasts a file, an event identifier that uniquely indicates a start time, a broadcast duration, and a content file, and a content type that makes it possible to identify the supplemental information separately from the content file The event identifier is also described in header information of a data block broadcast by digital broadcasting, and the program schedule table is received by a computer constituting the storage control unit in the receiving device. The event A step of generating a storage reservation management table for making a storage reservation for a content file identified by a different child by adding content type information, and a content defined to be reserved for storage in the storage reservation management table, A step of controlling the start of storage reservation at time, and a step of executing storage of content reserved for storage at the start time in units of carousel data blocks according to the combination of the header information and the content type information; The step of storing the content includes a step of executing storage control according to the content type from a combination of the header information and the content type information, and a supplement associated with the content file. Receive information separately from the content file In this case, the content type information representing the supplement information described in the program schedule table is identified, and the supplement information associated with the content file is received in the same TS in a manner that can be reserved for storage. A program including steps.

  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. ), By transmitting “supplemental information” when transmitting information such as subtitles related to the download file, information of only the subtitles can be efficiently transmitted or received. 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 correspondence of the content update classification and content identification information in the receiver of one Example which concerns on this invention. (A), (b), (c) is a figure which shows the transmission example of the supplementary information in the receiver of one Example which concerns on this invention. (A), (b), (c), (d) is a figure which shows the example of sending out the carousel, DII, and Module in one event in the transmitter of one Example which concerns on this invention. It is a figure which shows the example of transmission of the supplement information of a content in case the content in which the item in the transmitter of one Example which concerns on this invention is updated, and supplement information are transmitted within the same event. It is a figure which shows the example of the supplementary information of the content transmitted by download type | mold broadcast and real-time type | mold broadcast in the transmitter 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 a content type are added to the EIT to configure and transmit an “extended EIT”, or A content schedule that incorporates information necessary for content-oriented storage reservation (including scheduled recording in the case of video, etc.) that enables creation of a content table for content storage reservation Buru: a device for transmitting constituting the (CST table consists described later 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 a content type in the existing EIT. EIT ".
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 necessary. According to the “descriptor tag information (descriptor # tag)” for specifying the organization that uses the file transmission identifier set by the standardization organization, and the “identifier length (descriptor #)” indicating the length of the file transmission identifier. length) ”,“ encryption flag (encryption # flag) ”for identifying whether or not the content file has been encrypted in advance, and any information other than the above “Reserve (reserved # future # use)” and “Data component” to identify the data structure (data component) of the content file to be associated with the file transmission identifier set by the standardization organization 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 a platform company that operates, and disclosed to broadcasters and manufacturers. . 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, and “content type information (content #) representing the content type type # value1, content # type # value2, content # type # value3) ”and“ file version number (file # version # number) ”that enables checking whether the content file being broadcast has changed (this is file transmission Identifier (file # delivery # descriptor) can be omitted), “broadcast # count (8bits)” indicating the number of broadcasts, broadcast start time, broadcast duration, and broadcast 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 to the description field of each descriptor and transmitted. In this case, the file version number (file # version # number) ”can be omitted.

  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 content type, etc. For example, it can be used as follows.

(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. file # type # value is a 16-bit value that can be managed by public institutions and disclosed to broadcasters, manufacturers, etc. In this example, there are three types of content # type # value, which are extended It is configured to transmit by EIT or CST.

For example, file type (file # type # value), content type (content # type # value1),
Tables 1 to 5 show examples of bit assignments and identification items of content type (content # type # value2) and main / supplementary type of content (content # type # value3), identification items, 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 , Content # type # value1 and the content type, Table 4 shows the correspondence between content # type # value2 and the content update type, and Table 5 shows content # type # value3 The correspondence relationship with the supplement type is shown. Table 6 shows the relationship between the descriptor and the corresponding reception process.

  Note that the “file version number (file # version # number)” notifies the presence / absence of a change in 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], this “file version number (file # version # number) can be used without describing the file transmission identifier (file # delivery # descriptor). It is possible to determine whether or not a carousel has been received simply by referring to the value of “)”, and by describing in the extended EIT or CST, it is also possible to know that there has been a change in a general program. 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 update 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, At the time of obtaining the p / f information, 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), by describing the genre information for each item for the content of each item in the multi-item content, the receiving device 2 can store and control only the desired genre information. Get better.

  On the receiving device 2 side, when the content file is updated or replaced by CST [p / f], the file information descriptor (file # info # descriptor) described in the carousel DII Confirm by referring to “descriptor tag (descriptor # tag)” and “descriptor length (descriptor # length)” indicating that it is an information descriptor, and include in multiple item content with branch count information (branch # count) The number of item content files to be checked can be confirmed, and genre information (for example, content # nibble # level1, content # nibble # level2) of each item content file can be grasped.

  When the file transmission identifier (file # delivery # descriptor) is described in “CST [p / f]”, the branch number (ex # event # id) and data of the content file of the event identifier (event # id) Based on the 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 multiple item content and its version information.

  “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 by the carousel transmission method, and within 1 hour, 6 It is a table identifier categorized by a combination of contents of broadcast time within 1 hour, within 12 hours, within 1 day, and after 1 day. Note that for () means that it is repeatedly described for a predetermined number of times.

  “Section # syntex # indicator (1bit)” 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.

  When “reserved # future # use (1bit)” is used in a term that defines an encoded bitstream, its value can be used as an extension defined by, for example, a predetermined bit (B10) in the future. Represents. 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 (16bits)” 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 (1bit)” 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 (8bits)” 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 (16bits)” is one piece of transmission identification information indicating the network identification of the original distribution system.

  “Segment # last # section # number (8bits)” can also divide the sub-table into multiple segments according to the number of contents, broadcast start time, etc., and describe the number of the last section in the segment to which this section belongs . This is one piece of transmission identification information indicating the last segment section number for transmitting the CST. A section obtained by dividing a sub-table by a certain unit is defined as a section. For example, when 200 contents are divided into 10 contents, the number of segments is 20. It is also possible to provide “Last # table # id” 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 (8bits)” represents the number of times the content is broadcast.

  “Component # tag (8bits)” 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 the 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 “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 content file of the event identifier (event # id) Based on the branch number (ex # event # id) and data event identifier (data # event # id), whether or not a content file is updated or replaced based on the content file and version information of each item I can grasp it.

  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 used as a unique value by the broadcasting station for a certain 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 The identifier (event # id) is repeatedly used. By repeatedly delivering the same file, the receiving device 2 has an increased chance of receiving it even when it is moving, and can be reliably received. Further, the receiving device 2 can determine that it is not necessary to receive the same file if it has already been received by confirming the event identifier (event # id). It is assumed 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 a real-time service, and an event # id branch number (ex # event # id) and data # event # id are used in addition to event # id in a download service. I am doing so. 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, if you want to uniquely identify an item in the content, such as a news program, in addition to event # id Ex # event # id is used. For example, when event # id = “0x0001” is “national news”, the item “national news” can be uniquely specified by specifying ex # event # id.

<Event # id><ex# event # id>
0x0001 0x000 "National News" item 0
0x0001 0x001 "National News" item 1
0x0001 0x002 "National News" item 2
... ... ...

  If it is necessary to identify an item in the content, the value of ex # event # id is always assigned. If it is not necessary to identify an item in the content, ex # event # id = "0xFFF" or ex Assume that # 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 with different versions, different values of data # event # id are assigned to enable version management on the receiving device 2 side.

For example, if event # id = "0x0001" is "National News", specifying "ex # event # id" and "data # event # id" uniquely identifies the item "National News" including the version. can do.
<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 content version, be sure to assign the value of data # event # id. If the version identification is not required, set data # event # id = "0xF" or set data # event # id to You may not use it.

  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 transmitted for event # id, ex # event # id indicates an item in the content, and data # event # id indicates the version of each item.

For example, if event # id = "0x0002" is "traffic information", specifying the ex # event # id and data # event # id will include the items of each prefecture of "traffic information" including the version. It can be uniquely identified.
<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 identification of an item in the content is necessary, the value of ex # event # id is always given, and if identification of an item in the content is not necessary, ex # event # id = "0xFFF Or ex # event # id may not be used. If the content version needs to be identified, the data # event # id value is always assigned. If the version identification is not necessary, either 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. Further, 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, CST includes event # id, file # type # value, and content # type # value, and describes the transmission time including the re-transmission of content. In the extended EIT, one transmission time information (start # time, duration) is described for one event # id, whereas in the CST, a plurality of transmission time information is 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. Note that ex # event # id value and data # event # id value that are most likely to be changed in the immediate vicinity of transmission may not be described in 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.

  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”. The identifier numbering control unit 1021 that controls transmission in a manner associated with the event identifier (event # id) associated with the event identifier (event # id), and data that is transmitted by the carousel method for each event identified by the event identifier (event # id) It consists of a block count (DDB) transmission count and a transmission count / cycle management unit 1022 that manages the cycle of transmission in the carousel system. In order to manage the content transmitted by the carousel method as an event identified by an event identifier (event # id), the identifier numbering control unit 1021 transmits an event identifier (event # id) to the EIT generation unit 103 Have 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. In addition, the control data generation unit 102 includes “content type information (content # type)” representing a content type, “event identifier (event # id)”, and “series descriptor (series # id)” as content information. Are combined to organize “extended EIT” or “CST” to enable reservation accumulation control for each content type, and at least information of “event identifier (event # id)” and its “branch number” are stored in DII. "And" Data component identifier (data # component # id) "are set.

The EIT generating 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 “ A “file transmission identifier (file # delivery # descriptor)” including “file type information (file # type # value)” is generated and added to form an extended EIT, and PSI / SI generation encoding unit 12 as EIT program information To send. The file transmission descriptor generation unit 1031 includes “file transmission identifier (file # delivery) including“ file type information (file # type # value) ”indicating the content type of the content file identified by the event identifier (event # id). #descriptor) ". The EIT generation unit 103 incorporates 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. And can be configured to be sent to the PSI / SI generation encoding unit 12 as EIT program information. Even when “CST” is transmitted, “file type information (file # type # value)” indicating the type of content 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) is related to a carousel, DII and DDB modules are constructed and sent 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 a component tag (component # tag: ESm to ESn), and the content data is associated with the extended EIT or CST. For a plurality of selected contents, a download data block (DDB) can be switched for each content identified by an event identifier (event # id) using DII / DDB information extracted from a selected broadcast stream. it can. 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 replays 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. Broadcasting is possible, and the receiving apparatus 2 can know the number and cycle 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, PID in TS data is detected, and by reading this PID, content data, extended EIT or CST data can be identified, ES number (component # tag) is detected, and this ES The desired data can be identified by reading the number.

  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.

  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 transmits content data managed by an event identifier (event # id) according to extended EIT or CST according to a predetermined period and number of times according to extended EIT or CST (see FIG. 9)) 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) is set to “file type information (file # delivery # descriptor)” # type # value) "and 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 in the time axis direction in each channel is identified by the event identifier (event # id), and the content file type identified by the event identifier (event # id) is set to “file transmission identifier (file # delivery # descriptor EPG content program list can be immediately constructed by identifying “file type information (file # type # value)”.

  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 type of the content file identified by the event identifier (event # id) and identified by the event identifier (event # id) is set to “file type information” in “file transmission identifier (file # delivery # descriptor)”. (File # type # value) "to determine whether the content in the extended EIT or CST is a file that can be stored as a content file, and the file to be overwritten and stored with the content type information (content # type) Is determined (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. When the broadcast time comes, the DII of the corresponding elementary stream (ES) is acquired and the event identifier (event) described in the DII is obtained. The content file to be downloaded is specified together with the content type by the download ID (downloadID) associated with #id), and the data block (DDB) column 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 storage reserved content is being broadcast according to the broadcast start time (start # time), and if the content is outside the broadcast start time (start # time) (storage) If the reserved content is not being broadcast), it is registered in the storage reservation management table and waits 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 receiving device 2 stores 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, Replacement and overwrite update accumulation 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. 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 multiple item content Is transmitted as a multi-part data block. 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. When the receiving device 2 includes content nibble level 1 (Content # nibble # level1) and content nibble level 2 (content # nibble # level2) as genre information or hierarchical genre information, the genre of each item content Can be grasped.

  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) as “file transmission identifier ( Function identified by “file type information (file # type # value)” in “file # delivery # descriptor)”, “content type information (content # type)” indicating content type, and “event identifier (event # id)” ”And“ series descriptor (series # id) ”as content information, and has a function of performing reservation accumulation control for each content type. Further, the event identifier determination processing unit 2906 has the same content number as the event identifier (event # id) in the download ID (downloadID), and the content file in which only the data event identifier (data # event # id) is updated (that is, A content file whose file version has been updated), and an overwrite accumulation determination unit 2906a that performs replacement and overwrite accumulation when the file file exists. Further, 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 “file transmission identifier (file # delivery # descriptor)”. The file is identified by the “file type information (file # type # value)”, and the storage reservation management table generation unit 2909 generates the storage reservation management table and presents it to the user. Simultaneously with the generation of the management table, the corresponding file is automatically reserved (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 determines whether or not to overwrite. The unit 2906a determines whether or not 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 that the content received from this is to be overwritten or replaced (step S40).

  Subsequently, the content storage reservation control unit 29 uses the event identifier determination processing unit 2906 and the download ID determination processing unit 2908 to generate a carousel-type ES including the download ID (downloadID) DII associated with the event identifier (event # id). Obtaining (step S41), determining the event identifier (event # id) in the download ID in DII, and specifying the content file type identified by the event identifier (event # id) as “file transmission identifier (file Function identified by “file type information (file # type # value)” in “# delivery # descriptor)”, “content type information (content # type)” indicating content type, and “event identifier (event # id)” And a series descriptor (series # id) to identify 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 determined by the file type information is a scheduled download broadcast of the same content file among time-organized content files, the event identifier (event # id) of CST or extended EIT ) Is associated 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. Or DDB reception of the difference 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 “re-broadcast (the second and subsequent broadcasts)” content transmitted by the system can not only control the operation of storage reservation, but also “content type information (content # type)” that represents the content type. The combination of “event identifier (event # id)” and “series descriptor (series # id)” as content information enables reservation accumulation control for each content type.

  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 “file type information (file # type # value)” in “file transmission identifier (file # delivery # descriptor)” It is also possible to immediately identify the file type, immediately create a storage reservation management table for content storage reservation, and acquire 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.

  Further, 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 the content Reservation accumulation control according to the content type by identifying whether it is a series program from the “series descriptor (series # id)” as information and combining it with the “event identifier (event # id)” included in DII Can be performed.

  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 a unique DDB for each event identifier (event # id) by the receiving device 2. Even if the reception state is unstable, it is possible to efficiently download a file by acquiring only the differential DDB in the data carousel repeatedly transmitted.

  Hereinafter, a more specific example regarding the “content supplement information” according to the present invention will be described, and differences from the related art will be described.

  First, in the case of a real-time service, 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 a download service, in addition to data # event # id, event # id is embedded in the 0th to 15th bits, and ex # event # id is embedded in the 16th to 27th bits. Each DDB message header contains download # id with the same value as DII, so it is possible to uniquely identify the DDB block for each event # id and ex # event # id, and differential reception is possible It becomes. In addition, by using 4 bits of data # event # id as update information, it is possible to manage the version of the downloaded content.

  In a receiving device that always receives the latest information, such as traffic information, it is necessary to constantly monitor the update information of the downloaded file, and if the information is updated, store and receive and update the information by overwriting . In the download service, the 4 bits of data # event # id embedded in the download # id of DII or DDB are used as update information, so that the receiving device can overwrite and update the file. As for supplementary information, download # id is a fixed value, and differential reception is not performed.

  On the other hand, in the download service, the same event # id is different because the same content can be transmitted continuously or multiple times after a certain period of time, in order to enable missing data to be supplemented on the receiving side. There will be cases that are sent out in time. Also, it is assumed that the content is updated using the same event # id (ex # event # id is updated), such as news, or content that is constantly updated, such as traffic information. Is done. In addition, since the value of event # id is described in the CST required for download reservation after 8 days before the first transmission start time, in order to uniquely identify the content for a certain period, Except for retransmission, item update, constant update, and supplementary information transmission, the value of event # id needs to be kept unique.

  Therefore, as shown in Table 8, the case where the same event # id is used for general content is the case of retransmission of the same content (including retransmission of content with different data # event # id values) It is limited to.

(Content supplement information for download service)
Information for downloading content is transmitted by SI using broadcast waves, but there are cases where information supplementing the main content is also transmitted. Therefore, by using the “supplemental information” according to the present invention, it is possible to effectively present the downloaded content on the receiving device 2 side, and even if the content main content is missed, it is supplemented. Information can be presented. The supplementary information is normally transmitted on the assumption that it will be used in a download service. However, even if the receiving device 2 does not receive this supplementary information, it has an effect on the basic functions of content reservation, storage, and playback. There is no. Moreover, the utilization method of the supplementary information of the receiving device 2 that has received the supplementary information can be set as appropriate. The correspondence relationship between the content update type and the content identification information is illustrated in FIG.

In the present invention, when transmitting the supplement information associated with the content file in such a manner that the broadcast station side transmission device 1 can reserve for storage by describing the content type information representing the supplement information in the program schedule table. A fixed event identifier different from that of the content file is assigned, and the content file is transmitted in association with the content file in the same TS. On the other hand, the receiving device 2 identifies the content type information representing the supplementary information described in the program schedule table, and stores the content file associated with the content file in the same TS in a manner that allows storage reservation. The supplementary information to which a fixed event identifier different from that is attached is received.
For example, it is assumed that the supplemental information itself is given an event # id value as in the main content and is operated with a fixed value “0xFFFF”. Also, ex # event # id and data # event # id are not used, and “0xFFF” and “0xF” are described in transmission, respectively. As shown in FIG. 16, three types of supplemental information transmission methods are assumed in this case.

(1) Transmission within content (see FIG. 16A)
The supplementary information of the content is transmitted together with the time zone of the main content. In the extended EIT and CST, the event # id value and transmission time of the main part and the value of content # type # value3 = “0x0” are described, and the event # id value “0xFFFF” of supplementary information is not described. In this example, when the user of the receiving device 2 reserves content, the main part and the supplementary information can be downloaded during the transmission time period. When downloading, if the event # id value “0xFFFF” is described in the download # id on the DII in the carousel transmission, it can be processed by determining that it is supplementary information, and otherwise the main part.

(2) Transmission as another content (see FIG. 16B)
Like normal download content, supplemental information is transmitted in a time zone specified by extended EIT or CST, and supplemental information is transmitted for a plurality of main contents. In the extended EIT and CST, the event # id value “0xFFFF” of the supplementary information, the transmission time, and the value of content # type # value3 = “0x1” are described. In this example, when the user of the receiving device 2 makes a reservation for acquiring supplementary information, the supplementary information can be downloaded during the transmission time period. In the downloaded supplemental information, the event # id value, ex # event # id value, and data # event # id value of a plurality of contents are described, and the receiving device 2 determines that the supplementary information is for the content. Processing can be performed.

(3) Transmission as a separate service (see FIG. 16C)
In this example, as with normal download content, supplemental information is transmitted in a time zone specified by the extended EIT or CST, and supplementary information for a plurality of content mains with different service IDs in the same TS as the main content Is transmitted. In the extended EIT and CST, the event # id value “0xFFFF” of the supplementary information, the transmission time, and the value of content # type # value3 = “0x1” are described. In this example, when the user of the receiving device 2 makes a reservation for acquiring supplementary information, the supplementary information can be downloaded during the transmission time period. In the downloaded supplemental information, the event # id value, ex # event # id value, data # event # id value, and service # id value of a plurality of contents are described, and the receiving apparatus 2 supplements the supplementary information of the contents It can be judged that

  In the case of the above aspects (2) and (3), the supplementary information transmission period for the main part can be the same as the extended EIT or CST transmission period for the main part. For example, when the first transmission start time of the main part is T1, transmission of supplementary information can start within T1 + 8 days from T1-8 days. In addition, supplementary information of content with updated items may be limited to 7 days within 5 days from the day before the item occurrence date in this volume.

  In the supplementary information, the service # id value, event # id value, data # event # id value of the main part, and the ex # event # id value of the main part are described for the content whose items are updated. Can be uniquely identified. In addition, since it is assumed that the content of the supplementary information is updated, the version number of the supplementary information itself is also described in the supplementary information.

(Event, data event, carousel, module)
Hereinafter, a specific example of the carousel transmission of supplementary information and contents will be described. Similar to the real-time service, the download service provides coherent content for each event. One event is composed of one or more data events, and one data event is transmitted in one carousel. One carousel is composed of one DII and a plurality of modules (Modules) or one module, and one module is composed of a plurality of DDBs. When one carousel is composed of a plurality of modules, they can be combined by the Module # Link descriptor in the third part of ARIB STD-B24 described in DII.

  Each module is composed of a plurality of DDBs, and each DDB is given the number and block number of the module to which each DDB belongs in addition to the same download # id as DII. When one carousel is composed of a plurality of modules, in one carousel, the modules are transmitted in ascending order from the lowest number, and when all modules are transmitted, the transmission is performed again from the lowest number.

  Diagram showing a transmission example of carousel, DII, and Module in one event when one carousel is composed of a plurality of modules for general content, content whose items are updated, content that is constantly updated, and supplementary information of content 17 shows.

  As shown in FIG. 17A, in the case of general content, one event is composed of one data event. One carousel exists in one event, and one carousel is repeatedly transmitted.

  As shown in FIG. 17B, in the case of content in which items are updated, one event includes data events for the number of items. There are a plurality of carousels present in one event, and carousels corresponding to the number of items (ex # event # id) are sequentially transmitted. When transmission of all the carousels is completed, the transmission returns to the carousel that was transmitted first, and transmission is performed again.

  As shown in FIG. 17C, in the case of constantly updated content, one event includes a plurality of data events. There are a plurality of carousels existing in one event, and carousels of the maximum number of items multiplied by the data version (the number of ex # event # id x the number of data # event # id) are sequentially transmitted. When transmission of all carousels is completed, it returns to the carousel that was transmitted first, and transmission is performed again, but in the case of constantly updated content, the value of data # event # id is `` 0x0 '' to `` 0xE '', It should be noted that the data returns to “0x0” again, and the contents of the data are updated to the latest one at that time (different from the original value of “0x0”).

  As shown in FIG. 17 (d), in the case of supplementary information of content, a case where (1) transmission within the content, (2) transmission as another content, and (3) transmission through another service is assumed. When events for transmitting supplementary information are used as in (2) and (3), one carousel exists in one event, and one carousel is repeatedly transmitted. At this time, it is also possible to operate such that one module in the carousel transmits supplementary information for one main part and does not transmit supplementary information for two or more main parts.

  FIG. 18 shows an example in which (1) one carousel in the case of transmission in the content is configured by a plurality of modules and transmitted as supplementary information of the content. FIG. 18 shows a case where the content for which the item is updated and the supplemental information are transmitted in the same event, and supplementary information for the entire event (all items) is sent after item 1 (ex # event # id = 1). Then, after the item 2 (ex # event # id = 2), the whole supplement information having the same content is sent again. By repeatedly sending supplementary information with the same content, even if part of the main part could not be obtained, it is possible to receive supplementary information more reliably and present more accurate supplementary information It becomes.

  FIG. 19 shows an example of supplementary information of contents sent by download broadcasting and real-time broadcasting. Note that the content types in FIG. 19 can be identified by file # type # value for the following 1) to 7). (In FIG. 19, * 1 is a value that has no meaning in real-time content. * 2 is a value that has no meaning because the data # event # id value changes every moment. Further, supplementary information made up of still images is used for thumbnail display, for example.)

(Content type)
1) “Single” for general content
2) General content "series"
3) "News" of the content whose items are updated
4) “Sports” for content with updated items
5) “Weather / Meteorology” of the content whose items are updated
6) “Traffic information” for constantly updated content
7) and later Other (undefined)

  Compared with the prior art as a specific effect of transmitting supplementary information of the present invention, for example, in the conventional mode shown in FIG. 20, on the transmission side, subtitles are transmitted in PES in conjunction with video and audio for real-time broadcasting. On the receiving side, subtitles are displayed 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. 21, in the case of transmitting supplementary information according to the present invention, for example, subtitle information is converted into text information and transmitted as supplementary information as content linked to real-time broadcasting, so that the information of supplementary information is transmitted. Since the amount is small, it is possible to retransmit the supplementary information of the same content many times within the program time, and it is possible to prevent the loss of reception at the time of poor reception and solve the conventional problems. In addition, download broadcast content linked to real-time broadcast content is transmitted as a still image file for thumbnail display of the real-time broadcast content itself. ), It can be used for transmitting various information. In addition, in the conventional technology, since the reception environment is poor in the mobile environment, it has been necessary to repeatedly broadcast the content itself to download the content itself. According to the invention, by sending supplementary information with a small amount of information, related information can be obtained relatively quickly before the content itself is downloaded.

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

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

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

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

DESCRIPTION OF SYMBOLS 1 Broadcasting station side transmission apparatus 2 Reception apparatus 10 Content organization part 11 Carousel processing part 12 PSI / SI production | generation encoding part 13 Multiplexing part 14 OFDM modulation part 15 Transmission part 20 OFDM demodulation part 21 TS decoding part 22 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 supplementary information associated with a content file when transmitting the content file with a broadcast wave of digital broadcasting,
A service ID that uniquely specifies a service that broadcasts each content file, a start time, a broadcast duration, an event identifier that uniquely represents the content file, and a content type that can identify the supplemental information separately from the content file Program schedule table generating means for generating a program schedule table, including content type information representing
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,
The content file transmission means includes means for transmitting the content file by controlling a combination of the header information and the content type information so as to perform an accumulation operation according to the content type on the receiving side, and When transmitting supplementary information associated with a content file separately from the content file, the content schedule information can be reserved by describing the content type information representing the supplementary information in the program schedule table. A transmission apparatus comprising means for transmitting in association with a content file.   The content file transmitting means includes means for transmitting the supplementary information by giving a fixed event identifier different from the content file when transmitting supplementary information associated with the content file. The transmission apparatus according to claim 1. A receiving device that receives supplementary information associated with a content file when receiving the content file on a broadcast wave of digital broadcasting,
The program schedule table for the content file includes a service ID that uniquely specifies a service that broadcasts each content file, a start time, a broadcast duration, an event identifier that uniquely represents the content file, and the content file separately from the content file Content type information representing a content type that makes it possible to identify supplemental information, and the event identifier is also described in header information of a data block broadcast by digital broadcasting,
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 has means for executing accumulation control according to the content type from a combination of the header information and the content type information. Further, supplemental information associated with the content file is defined as the content file. When receiving separately, the content type information representing the supplementary information described in the program schedule table is identified, and the supplementary information associated with the content file in the same TS is stored in a manner capable of being reserved for storage. A receiving device comprising receiving means.   The content storage execution means includes means for receiving the supplement information to which a fixed event identifier different from that of the content file is given when the supplement information associated with the content file is received. The receiving device according to claim 3. When a content file is received by a broadcast wave of digital broadcasting, the program schedule table for the content file uniquely specifies a service for broadcasting each content file in the receiving device that receives supplementary information associated with the content file. A service ID, 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 that allows the supplementary information to be identified separately from the content file, The identifier is also described in the header information of the data block broadcast by digital broadcasting, and the computer constituting the accumulation 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 includes executing accumulation control according to the content type from a combination of the header information and the content type information.
When receiving supplementary information associated with the content file separately from the content file, the content type information representing the supplemental information described in the program schedule table is identified and stored in the same manner in a manner that can be reserved for storage. Receiving the supplementary information associated with the content file in the TS.

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