Reception apparatus and data processing method

1. A reception apparatus comprising:

processing circuitry configured to

receive content; and

control reproduction of the content on a basis of time correspondence information associating first time information provided from a transmission side of the content with second time information generated on a reception side of the content,

wherein

time indicated by the first time information represents a particular position in a bootstrap or a preamble of a frame in which the first time information is provided,

the frame includes the preamble, which contains time metadata for correcting the first time information, and

the processing circuitry is further configured to correct the first time information based on the time metadata.

2. The reception apparatus according to claim 1 ,

wherein the content is transmitted in units of frames being a unit for transmitting data of the content,

the first time information is included in the frame, and

the processing circuitry is further configured to

obtain the second time information according to a timing at which the first time information is received in a case where the first time information included in the frame is received, and

manage the obtained second time information as the time correspondence information in association with the received first time information.

3. The reception apparatus according to claim 2 , wherein the processing circuitry is further configured to

obtain the time correspondence information associating the first time information and the second time information at a past time point,

obtain the second time information at a current time point,

calculate the first time information at the current time point from a relationship among the second time information at the current time point, the second time information at the past time point, and the first time information at the past time point, and

control the reproduction of the content on the basis of the calculated first time information at the current time point.

4. The reception apparatus according to claim 3 ,

wherein the time correspondence information is information indicating time indicated by the first time information at the past time point and time indicated by the second time information at the past time point, or information being a difference between the time indicated by the first time information at the past time point and the time indicated by the second time information at the past time point.

5. The reception apparatus according to claim 4 ,

wherein the content is broadcast content distributed by broadcast,

the first time information is a Precision Time Protocol (PTP), and

the second time information is a system time (System Time).

6. The reception apparatus according to claim 2 ,

wherein the first time information is included in at least one frame, and

the time indicated by the first time information represents a time at a head position of the frame in which the first time information is provided.

7. The reception apparatus according to claim 1 ,

wherein the processing circuitry is further configured to control operation of:

an application for reproducing the content; and

middleware for managing the time correspondence information,

the middleware provides the time correspondence information in response to a request from the application, and

the application controls reproduction of the content on the basis of the time correspondence information provided from the middleware.

8. The reception apparatus according to claim 1 ,

wherein the content is distributed in streaming distribution conforming to MPEG-Dynamic Adaptive Streaming over HTTP (MPEG-DASH), and

the processing circuitry is further configured to control reproduction of the content on the basis of Media Presentation Description (MPD) metadata.

9. A data processing method on a reception apparatus, the method comprising:

receiving content; and

controlling, by processing circuitry of the reception apparatus, reproduction of the content on the basis of time correspondence information associating first time information provided from a transmission side of the content with second time information generated on a reception side of the content, wherein

time indicated by the first time information represents a particular position in a bootstrap or a preamble of a frame in which the first time information is provided,

the frame includes the preamble, which contains time metadata for correcting the first time information, and

the method further comprises correcting the first time information based on the time metadata.

10. The method according to claim 9 ,

wherein the content is transmitted in units of frames being a unit for transmitting data of the content,

the first time information is included in the frame, and

the method further comprises

obtaining the second time information according to a timing at which the first time information is received in a case where the first time information included in the frame is received, and

managing the obtained second time information as the time correspondence information in association with the received first time information.

11. The method according to claim 10 , wherein the method further comprises:

obtaining the time correspondence information associating the first time information and the second time information at a past time point,

obtaining the second time information at a current time point,

calculating the first time information at the current time point from a relationship among the second time information at the current time point, the second time information at the past time point, and the first time information at the past time point, and

controlling the reproduction of the content on the basis of the calculated first time information at the current time point.

12. The method according to claim 11 , wherein the time correspondence information is information indicating time indicated by the first time information at the past time point and time indicated by the second time information at the past time point, or information being a difference between the time indicated by the first time information at the past time point and the time indicated by the second time information at the past time point.

13. The method according to claim 12 ,

wherein the content is broadcast content distributed by broadcast,

the first time information is a Precision Time Protocol (PTP), and

the second time information is a system time (System Time).

14. The method according to claim 10 ,

wherein the first time information is included in at least one frame, and

the time indicated by the first time information represents a time at a head position of the frame in which the first time information is provided.

15. The method according to claim 9 ,

wherein the method further comprises controlling operation of:

an application for reproducing the content; and

middleware for managing the time correspondence information,

the middleware provides the time correspondence information in response to a request from the application, and

the application controls reproduction of the content on the basis of the time correspondence information provided from the middleware.

16. The method according to claim 9 ,

wherein the content is distributed in streaming distribution conforming to MPEG-Dynamic Adaptive Streaming over HTTP (MPEG-DASH), and

the method further comprises controlling reproduction of the content on the basis of Media Presentation Description (MPD) metadata.