Method and apparatus for encoding media data comprising generated content

Patent metadata

Field	Value
Publication number	US-11070893-B2
Application number	US-201816497215-A
Country	US
Kind code	B2
Filing date	Mar 20, 2018
Priority date	Mar 27, 2017
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

The present invention concerns a method for encoding media data composed of a plurality of samples, the method comprising by a server device: encoding the media data to obtain encoded media data; encapsulating the encoded media data in a set of at least one first track; generating a second track; wherein: the second track describes samples representing the result of applying a set of at least one transformation operator to samples of at least one first track; the second track comprises references to at least one of the first tracks; and the second track comprises in the metadata part, a description of the set of transformation operators.

First claim

The invention claimed is:

1. A method for encapsulating encoded media data composed of a plurality of samples, the method comprising by a server device:
obtaining encoded media data;
encapsulating the encoded media data in a set of at least one first track;
generating a second track;
wherein:
the second track describes samples comprising a set of transformation rules and parameters adapted to be applied on samples of at least one first track;
the second track comprises references to at least one of the first tracks; and
the second track comprises in a metadata part, a description of the set of transformation operators.

2. The method of claim 1 , further comprising:
encapsulating one or more parameters for characterizing at least one transformation operator, in a metadata part of the second track.

3. The method of claim 2 , further comprising:
encapsulating one or more parameters for characterizing at least one transformation operator, in a header part of the metadata part of the second track.

4. The method of claim 3 , further comprising:
encapsulating one or more parameters for characterizing at least one transformation operator, in a sample table box of the metadata part, of the second track.

5. The method of claim 2 , further comprising:
encapsulating one or more specific parameters for characterizing at least one transformation operator, to be used for specific samples described in the second track, in a media data part of the second track.

6. The method of claim 2 , further comprising:
encapsulating one or more specific parameters for characterizing at least one transformation operator, to be used for specific samples described in the second track, in the metadata part of the second track, and providing some references to these specific parameters, in a media data part of the second track.

7. The method of claim 2 , wherein:
the data part of the second track is marked as empty.

8. The method of claim 1 , further comprising:
providing one or more parameters for characterizing at least one transformation operator, in a third track, the second track further comprising a reference to the third track.

9. The method of claim 8 , wherein the one or more parameters are included in a media data part of the third track.

10. The method of claim 1 , wherein the second track further comprises in the media data, samples representing the result of applying a set of at least one transformation operator to samples of the at least one first track.

11. The method of claim 1 , wherein one of the transformation operator allows to signal a spatial portion of a capturing projection.

12. A non-transitory computer-readable storage medium storing instructions of a computer program for implementing a method according to claim 1 .

13. A method for reading encapsulated encoded media data composed of a plurality of samples, the method comprising by a client device:
receiving a second track describing samples comprising a set of transformation rules and parameters adapted to be applied on samples of at least one first track, the second track comprising references to the at least one first track and, the second track comprising in a metadata part of the second track, a description of the set of at least one transformation operator;
receiving the at least one first track;
generating the samples of the media data by applying the set of transformation operators to samples received in the at least one first track.

14. A server device for encapsulating encoded media data composed of a plurality of samples, the server device comprising a processor adapted to:
obtaining encoded media data;
encapsulating the encoded media data in a set of at least one first track;
generating a second track;
wherein:
the second track describes samples comprising a set of transformation rules and parameters adapted to be applied to samples of at least one first track;
the second track comprises references to at least one of the first tracks; and
the second track comprises in a metadata part, a description of the set of transformation operators.

15. A client device for reading encapsulated encoded media data composed of a plurality of samples, the client device comprising a processor adapted to:
receiving a second track describing samples comprising a set of transformation rules and parameters adapted to be applied to samples of at least one first track, the second track comprising references to the at least one first track and, the second track comprising in a metadata part of the second track, a description of the set of at least one transformation operator;
receiving the at least one first track;
generating the samples of the media data by applying the set of transformation operators to samples received in the at least one first track.

Assignees

• Canon Kk

Inventors

• Denoual Franck
• Maze Frédéric

Classifications

• H04N21/85406

  involving a specific file format, e.g. MP4 format · CPC title

• H04N21/8456 Primary

  by decomposing the content in the time domain, e.g. in time segments · CPC title

• H04N21/2353 Primary

  specifically adapted to content descriptors, e.g. coding, compressing or processing of metadata · CPC title

• H04N21/23439 Primary

  for generating different versions · CPC title

• H04N21/234345 Primary

  the reformatting operation being performed only on part of the stream, e.g. a region of the image or a time segment · CPC title