Transmission method, reception method, transmission device, and reception device

• US 10,356,474 B2
• Filed: 12/16/2015
• Issued: 07/16/2019
• Est. Priority Date: 07/25/2013
• Status: Active Grant

• Current Assignee: Sun Patent Trust
• Original Assignee: Sun Patent Trust
• Inventors: Toma, Tadamasa, Iguchi, Noritaka, Nishi, Takahiro, Katou, Hisaya
• Primary Examiner(s): Chen, Cai Y
• Application Number:
  US14/970,750
• Publication Number:
  US 20160100220A1
• Time in Patent Office: 1,308 Days
• Field of Search: None
• CPC Class Codes: H04H 20/18 Arrangements for synchronising broadcast or distribution via plural systems
• CPC Class Codes: H04H 2201/40 characterised in that additional data relating to the broadcast data are available via a different channel than the broadcast channel
• CPC Class Codes: H04H 60/13 Arrangements for device control affected by the broadcast information
• CPC Class Codes: H04N 21/4302 Content synchronisation processes, e.g. decoder synchronisation
• CPC Class Codes: H04N 21/43072 of multiple content streams on the same device
• CPC Class Codes: H04N 21/44004 involving video buffer management, e.g. video decoder buffer or video display buffer
• CPC Class Codes: H04N 21/44012 involving rendering scenes according to scene graphs, e.g. MPEG-4 scene graphs
• CPC Class Codes: H04N 21/4622 Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet web site content organization and management for information retrieval from the Internet G06F16/958; transmission by internet of broadcast information H04H60/82; stock exchange data over packet-switching network H04L12/1804; push services including data channel over packet-switching network H04L12/1859
• CPC Class Codes: H04N 21/4888 for displaying teletext characters
• CPC Class Codes: H04N 21/8543 using a description language, e.g. Multimedia and Hypermedia information coding Expert Group [MHEG], eXtensible Markup Language [XML] information retrieval of semistructured data, the underlying structure being taken into account, e.g. mark-up language structure data G06F16/80

Abstract

According to one aspect of the present disclosure, a transmission method for enabling transmission of content using a broadcast wave and a communication channel includes: transmitting auxiliary information using at least the broadcast wave, the auxiliary information being information for synchronizing content transmission using the broadcast wave and content transmission using the communication channel when the content is transmitted using the broadcast wave and the communication channel, and the auxiliary information causing a reception side to perform the synchronization when the reception side receives the auxiliary information. Therefore, even if timing of starting reception of the content through the communication is delayed, the reception side can play back the content by a combination of the broadcasting and the communication.

Claims

1. A transmission method for enabling transmission of content using a broadcast wave and a communication channel, the transmission method comprising:

generating a first content data and a second content data in a format in accordance with an MPEG Media Transport (MMT) standard;

transmitting auxiliary information using at least the broadcast wave, the auxiliary information being information for synchronizing the first content data and the second content data;

hybrid-transmitting the first content data and the second content data, the first content data being transmitted using the broadcast wave and the second content data being transmitted using the communication channel so that the first content data and the second content data constitute the content, and when the content is hybrid-transmitted using the broadcast wave and the communication channel, the auxiliary information causing a reception side to perform the synchronization when the reception side receives the auxiliary information;

wherein, in the transmitting of the auxiliary information, the auxiliary information includes attribute information indicating that the first content data and the second content data constitute the content and difference information between a reference clock of the content transmitted using the broadcast wave and a reference clock of the content transmitted using the communication channel,

the first content data and the second content data are (i) identical video and audio data each indicating the content, or (ii) video data, audio data, or video and audio data that constitute the content, and

the hybrid-transmitting of the first content and the second content is in the format in accordance with the MMT standard.

2. The transmission method according to claim 1, wherein

the transmitting of the auxiliary information includes transmitting the auxiliary information before hybrid-transmitting the content, and

the auxiliary information further includes location information that indicates an acquisition destination of the content or information indicating an acquisition destination of the location information.

3. The transmission method according to claim 1, wherein, in the transmitting of the auxiliary information, when reference clocks of pieces of content differ, the auxiliary information transmission causes the reception side to perform the synchronization through synchronization of the reference clock of the content transmission using the communication channel with the reference clock of the content transmission using the broadcast wave based on the difference information.

4. The transmission method according to claim 1, wherein, in the generating of the first and second content data constituting the content, the content is generated while the auxiliary information is included in message information that is information relating to the acquisition of the content.

10. The transmission method according to claim 1, wherein

the first content data is basic layer data of (i) video and audio data indicating the content or (ii) video data, audio data, or video and audio data that constitute the content, and

the second content data is extended layer data of (i) the video and audio data indicating the content or (ii) the video data, the audio data, or the video and audio data that constitute the content.

11. The transmission method according to claim 1, wherein

the attribute information includes information for identifying that an asset of the first content data and an asset of the second content data are related to each other.

5. A reception method comprising:

receiving content hybrid-transmitted as first content data transmitted using a broadcast wave and a second content data transmitted using a communication channel, the content being generated and hybrid-transmitted in a format in accordance with an MPEG Media Transport (MMT) standard; and

playing back the content transmitted using the broadcast wave and the content transmitted using the communication channel by synchronizing the first content data transmitted using the broadcast wave and the second content data transmitted using the communication channel so that the first content data and the second content data constitute the content, when auxiliary information for synchronizing the content transmitted using the broadcast wave and the content transmitted using the communication channel is received,

wherein, in the playback of the content,

the content is played back while the synchronization is performed through synchronization of the reference clock of the content transmitted using the communication channel with the reference clock of the content transmitted using the broadcast wave based on the difference information, when the auxiliary information including attribute information indicating that the first content data and the second content data constitute the content and difference information between a reference clock of the content transmitted using the broadcast wave and a reference clock of the content transmitted using the communication channel is received in the receiving step,

the reference clock of the content transmission using the broadcast wave differs from the reference clock of the content transmission using the communication channel, and

the first content data and the second content data are (i) identical data each indicating the content, or (ii) video data, audio data, or video and audio data that constitute the content.

6. The reception method according to claim 5, wherein

the receiving of the content includes receiving the auxiliary information before receiving the content, and

the content is received by acquiring the content based on location information when the auxiliary information includes the location information, the location information indicating an acquisition destination of the content.

7. The reception method according to claim 5, wherein

the receiving of the content includes receiving the auxiliary information before receiving the content, and

the content is received by acquiring location information based on information indicating an acquisition destination of the location information, and acquiring the content based on the acquired location information when the auxiliary information includes the information indicating the acquisition destination of the location information, the location information indicating an acquisition destination of the content.

8. A transmission device that can transmit content using a broadcast wave and a communication channel, the transmission device comprising:

a transmitter that generates a first content data and a second content data in a format in accordance with an MPEG Media Transport (MMT) standard, transmits auxiliary information using at least the broadcast wave, the auxiliary information being information for synchronizing the first content data and the second content, and hybrid-transmitting the first content data using the broadcast wave and the second content data using the communication channel so that the first content data and the second content data constitute the content, and when the content is hybrid-transmitted using the broadcast wave and the communication channel, the auxiliary information causing a reception side to perform the synchronization when the reception side receives the auxiliary information,

wherein, in the transmitting of the auxiliary information by the transmitter, the auxiliary information includes attribute information indicating that the first content data and the second content data constitute the content and difference information between a reference clock of the content transmitted using the broadcast wave and a reference clock of the content transmitted using the communication channel,

the first content data and the second content data are (i) identical data each indicating the content, or (ii) video data, audio data, or video and audio data that constitute the content, and

the hybrid-transmitting of the first content and the second content is in the format in accordance with the MMT standard.

9. A reception device comprising:

a receiver that receives content hybrid-transmitted as a first content data transmitted using a broadcast wave and a second content data transmitted using a communication channel, the content being generated and hybrid-transmitted in a format in accordance with an MPEG Media Transport (MMT) standard; and

a player that plays back the content transmitted using the broadcast wave and the content transmitted using the communication channel by synchronizing the first content data transmitted using the broadcast wave and the second content data transmitted using the communication channel so that the first content data and the second content data constitute the content, when auxiliary information for synchronizing the content transmitted using the broadcast wave and the content transmitted using the communication channel is received,

wherein, in the playback by the player,

the content is played back while the synchronization is performed through synchronization of the reference clock of the content transmitted using the communication channel with the reference clock of the content transmitted using the broadcast wave based on the difference information, when the auxiliary information including attribute information indicating that the first content data and the second content data constitute the content and difference information between a reference clock of the content transmitted using the broadcast wave and a reference clock of the content transmitted using the communication channel is received in the receiving step,

the reference clock of the content transmission using the broadcast wave differs from the reference clock of the content transmission using the communication channel, and

the first content data and the second content data are (i) identical data each indicating the content, or (ii) video data, audio data, or video and audio data that constitute the content.