Transmission apparatus, transmission method, reception apparatus and reception method

• US 10,069,930 B2
• Filed: 11/11/2014
• Issued: 09/04/2018
• Est. Priority Date: 06/04/2014
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kitazato, Naohisa, Dewa, Yoshiharu
• Primary Examiner(s): WHIPPLE, BRIAN P
• Application Number:
  US15/303,754
• Publication Number:
  US 20170041423A1
• Time in Patent Office: 1,393 Days
• Field of Search: None
• CPC Class Codes: H04H 60/27 Arrangements for recording or accumulating broadcast information or broadcast-related information
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04L 67/5681 Pre-fetching or pre-delivering data based on network characteristics
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04N 21/4331 Caching operations, e.g. of an advertisement for later insertion during playback
• CPC Class Codes: H04N 21/4345 Extraction or processing of SI, e.g. extracting service information from an MPEG stream
• CPC Class Codes: H04N 21/8173 End-user applications, e.g. Web browser, game

Abstract

A data broadcasting file based on HTML5 is transported in an MMT method. In a data content management table, information of a list of broadcasting transport files and a central file constituting a presentation unit, and a list of files to be pre-cached is described for each data broadcasting presentation unit. When a list of broadcasting files constituting a data broadcasting presentation unit to be referred to next after a current data broadcasting presentation unit is designated as a pre-cache target, a receiver side can pre-cache file data necessary for a data broadcasting presentation unit to be transitioned to next, and a timely data broadcasting service interoperating with a broadcast program can be realized.

Claims

1. A transmission apparatus comprising:

a data file transmission unit configured to transmit a data file to be used in data broadcasting in a first transport packet in which first payload type information indicating that the data file is included in a payload is inserted into a packet header; and

a signaling message transmission unit configured to transmit a signaling message related to the data broadcasting in a second transport packet in which second payload identification information indicating that the signaling message is included in a payload is inserted into a packet header,

wherein the signaling message transmission unit includes, in the signaling message, a data content management table in which a presentation unit tag for identifying a presentation unit of data broadcasting, the number of nodes to be unlocked from cache of each presentation unit, and unlock cache information indicating a node tag for identifying an unlock target node are described, and a data asset management table in which item identification information for identifying a data file related to the node tag is described, and transmits the message.

2. The transmission apparatus according to claim 1, wherein the signaling message transmission unit further includes, in the signaling message, a link presentation unit tag for identifying another presentation unit linked to the presentation unit of the data broadcasting and transmits the message.

3. A transmission method comprising:

a data file transmission step of a data file transmission unit included in a transmission apparatus transmitting a data file to be used in data broadcasting in a first transport packet in which first payload type information indicating that the data file is included in a payload is inserted into a packet header; and

a signaling message transmission step of a signaling message transmission unit included in the transmission apparatus transmitting a signaling message related to the data broadcasting in a second transport packet in which second payload type information indicating that the signaling message is included in a payload is inserted into a packet header,

wherein, in the signaling message transmission step, a data content management table in which a presentation unit tag for identifying a presentation unit of data broadcasting, the number of nodes to be unlocked from cache of each presentation unit, and unlock cache information indicating a node tag for identifying an unlock target node are described, and a data asset management table in which item identification information for identifying a data file related to the node tag is described are included in the signaling message and transmitted.

4. A reception apparatus comprising:

a data file reception unit configured to receive a first transport packet that includes a data file to be used in data broadcasting in a payload, in which first payload type information indicating that the data file is included in the payload is inserted into a packet header;

a signaling message reception unit configured to receive a second transport packet that includes a signaling message to be used in the data broadcasting in a payload, in which second payload identification information indicating that the signaling message is included in the payload is inserted into a packet header; and

a control unit configured to control cache of a data file based on a data content management table in which a presentation unit tag for identifying a presentation unit of data broadcasting, the number of nodes to be unlocked from cache of each presentation unit, and unlock cache information indicating a node tag for identifying an unlock target node are described, and a data asset management table in which item identification information for identifying a data file related to the node tag is described, both tables included in the signaling message.

5. A reception method comprising:

a data file reception step of a data file reception unit included in a reception apparatus receiving a first transport packet that includes a data file to be used in data broadcasting in a payload, in which first payload type information indicating that the data file is included in the payload is inserted into a packet header;

a signaling message reception step of a signaling message reception unit included in the reception apparatus receiving a second transport packet that includes a signaling message related to the data broadcasting in a payload, in which second payload identification information indicating that the signaling message is included in the payload is inserted into a packet header; and

a control step of a control unit included in the reception apparatus controlling cache of a data file based on a data content management table in which a presentation unit tag for identifying a presentation unit of data broadcasting, the number of nodes to be unlocked from cache of each presentation unit, and unlock cache information indicating a node tag for identifying an unlock target node are described, and a data asset management table in which item identification information for identifying a data file related to the node tag is described, both tables included in the signaling message.