Video coding

• US 8,401,089 B2
• Filed: 02/05/2007
• Issued: 03/19/2013
• Est. Priority Date: 07/19/1999
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Hannuksela, Miska
• Primary Examiner(s): DIEP, NHON THANH
• Application Number:
  US11/671,439
• Publication Number:
  US 20070171986A1
• Time in Patent Office: 2,234 Days
• Field of Search: None
• US Class Current: 375/240.28
• CPC Class Codes: H04N 19/00 Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
• CPC Class Codes: H04N 19/159 Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
• CPC Class Codes: H04N 19/172 the region being a picture, frame or field
• CPC Class Codes: H04N 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards
• CPC Class Codes: H04N 19/89 involving methods or arrangements for detection of transmission errors at the decoder

Abstract

A method of video encoding including receiving a video signal to be coded; coding data representing a frame of said video signal; and repeating part, but not all, of the data. The repeated part including the picture header for the frame. A method of decoding an encoded video signal including receiving coded data representing frames of a video signal; examining the coded data to detect header data and picture data; when an error in the picture header is detected, storing the picture data in a temporary picture data store, detecting a repeat of the header data; and decoding the stored picture data using the repeated header data.

Claims

1. A method of video source encoding, using an apparatus, the method comprising:

generating, using the apparatus, a first source encoded bit-stream portion representative of a first video frame, the first source encoded bit-stream portion comprising picture header data for the first video frame and corresponding source encoded picture data for the whole of the first video frame;

generating, using the apparatus, a second source encoded bit-stream portion, the second source encoded bit-stream portion comprising a repeat of at least a part of the picture header data for the first video frame; and

providing, using the apparatus, the second source encoded bit-stream portion in the source encoded bit-stream subsequent to and outside the first source encoded bit-stream portion without repeating the corresponding source encoded picture data for the whole of the first video frame.

2. A method according to claim 1, comprising generating, using the apparatus, a second source encoded bit-stream portion comprising a repeat of at least a part of the picture header data for the first video frame only if the first video frame is encoded in INTRA-frame format.

3. A method according to claim 1, comprising generating, using the apparatus, the second source encoded bit-stream portion as a source encoded bit-stream portion representative of an incomplete part of a video frame that only comprises a repeat of at least a part of the picture header data for the first video frame and a first segment of the source encoded picture data for the first video frame.

4. A method according to claim 1, comprising generating, using the apparatus, the second source encoded bit-stream portion as a source encoded bit-stream portion that comprises a repeat of at least a part of the picture header data for the first video frame and further data, the further data indicating that the second source encoded bit-stream portion is representative of a video frame that is unaltered with respect to a reference frame.

5. A method according to claim 4, wherein the further data comprises an indication or indications that no source encoded picture data has changed with respect to a previous video frame.

6. A method according to claim 1, comprising generating, using the apparatus, the second source encoded bit-stream portion as a source encoded bit-stream portion representative of a video frame subsequent to the first video frame in encoding order, the second source encoded bit-stream portion comprising picture header data for the subsequent video frame and source encoded picture data for the subsequent video frame, and providing, using the apparatus, a repeat of at least a part of the picture header data for the first video frame in the picture header data of the subsequent video frame.

7. A method according to claim 6, comprising repeating, using the apparatus, only certain fields of the picture header data for the first video frame in the picture header data of the subsequent video frame.

8. A method according to claim 1, comprising generating, using the apparatus, the second source encoded bit-stream portion as a source encoded bit-stream portion representative of a video frame subsequent to the first video frame in encoding order, the second source encoded bit-stream portion comprising picture header data for the subsequent video frame and source encoded picture data for the subsequent video frame and providing, using the apparatus, a repeat of at least a part of the picture header data for the first video frame in Supplemental Enhancement Information of the subsequent video frame.

9. A method according to claim 8, comprising providing, using the apparatus, a repeat of at least a part of the picture header data for the first video frame in the Supplemental Enhancement Information of the subsequent video frame, excluding the picture start code for the first video frame.

10. A method according to claim 1, comprising generating the second source encoded bit-stream portion as a source encoded bit-stream portion representative of an incomplete part of a video frame that only comprises the picture header data for the first video frame and a first segment of the source encoded picture data for the first video frame and identifying the second source encoded bit-stream portion as comprising a repeat of the picture header data for the first video frame by giving the repeated picture header data the same temporal reference as the picture header data of the first video frame.

11. Apparatus for video source encoding, wherein the apparatus is configured to:

generate a first source encoded bit-stream portion representative of a first video frame, the first source encoded bit-stream portion comprising picture header data for the first video frame and corresponding source encoded picture data for the whole of the first video frame;

generate a second source encoded bit-stream portion, the second source encoded bit-stream portion comprising a repeat of at least a part of the picture header data for the first video frame; and

provide the second source encoded bit-stream portion in the source encoded bit-stream subsequent to and outside the first source encoded bit-stream portion without a repeat of the corresponding source encoded picture data for the whole of the first video frame.

12. Apparatus for video source encoding according to claim 11, wherein the apparatus is configured to generate a second source encoded bit-stream portion comprising a repeat of at least a part of the picture header data for the first video frame only if the first video frame is encoded in INTRA-frame format.

13. Apparatus for video source encoding according to claim 11, wherein the apparatus is configured to generate the second source encoded bit-stream portion as a source encoded bit-stream portion representative of an incomplete part of a video frame that only comprises a repeat of at least part of the picture header data for the first video frame and a first segment of the source encoded picture data for the first video frame.

14. Apparatus for video source encoding according to claim 11, wherein the apparatus is configured to generate the second source encoded bit-stream portion as a source encoded bit-stream portion that comprises a repeat of at least part of the picture header data for the first video frame and further data, the further data indicating that the second source encoded bit-stream portion is representative of a video frame that is unaltered with respect to a reference frame.

15. Apparatus for video source encoding according to claim 14, wherein the further data comprises an indication or indications that no source encoded picture data has changed with respect to a previous video frame.

16. Apparatus for video source encoding according to claim 11, wherein the apparatus is configured to generate the second source encoded bit-stream portion as a source encoded bit-stream portion representative of a video frame subsequent to the first video frame in encoding order, the second source encoded bit-stream portion comprising picture header data for the subsequent video frame and source encoded picture data for the subsequent video frame and to provide a repeat of at least a part of the picture header data for the first video frame in the picture header data for the subsequent video frame.

17. Apparatus for video source encoding according to claim 16, wherein the apparatus is configured to repeat only certain fields of the picture header data for the first video frame in the picture header data of the subsequent video frame.

18. Apparatus for video source encoding according to claim 11, wherein the apparatus is configured to generate the second source encoded bit-stream portion as a source encoded bit-stream portion representative of a video frame subsequent to the first video frame in encoding order, the second source encoded bit-stream portion comprising picture header data for the subsequent video frame and source encoded picture data for the subsequent video frame and to provide a repeat of at least a part of the picture header data for the first video frame in Supplemental Enhancement Information of the subsequent video frame.

19. Apparatus for video source encoding according to claim 18, wherein the apparatus is configured to provide a repeat of at least a part of the picture header data for the first video frame in the Supplemental Enhancement Information of the subsequent video frame, excluding the picture start code for the first video frame.

20. Apparatus for video source encoding according to claim 11, wherein the apparatus is configured to generate the second source encoded bit-stream portion as a source encoded bit-stream portion representative of an incomplete part of a video frame that only comprises the picture header data for the first video frame and a first segment of the source encoded picture data for the first video frame and to identify the second source encoded bitstream portion as comprising a repeat of the picture header data for the first video frame by giving the repeated picture header data the same temporal reference as the picture header data of the first video frame.

21. A non-transitory computer readable medium comprising a source encoded bit-stream, the source encoded bit-stream comprising:

a first source encoded bit-stream portion representative of a first video frame, the first source encoded bit-stream portion comprising picture header data for the first video frame and corresponding source encoded picture data for the whole of the first video frame; and

a second source encoded bit-stream portion, the second source encoded bit-stream portion comprising a repeat of at least a part of the picture header data for the first video frame, the second source encoded bit-stream portion provided in the source encoded bit-stream subsequent to and outside the first source encoded bit-stream portion without a repeat of the corresponding source encoded picture data for the whole of the first video frame.

22. A network device comprising apparatus for video source encoding, wherein the apparatus for video source encoding is configured to:

generate a first source encoded bit-stream portion representative of a first video frame, the first source encoded bit-stream portion comprising picture header data for the first video frame and corresponding source encoded picture data for the whole of the first video frame;

generate a second source encoded bit-stream portion, the second source encoded bit-stream portion comprising a repeat of at least a part of the picture header data for the first video frame; and

provide the second source encoded bit-stream portion in the source encoded bit-stream subsequent to and outside the first source encoded bit-stream portion without a repeat of the corresponding source encoded picture data for the whole of the first video frame.

23. A network comprising a network device according to claim 22.

24. A terminal device comprising apparatus for video source encoding, wherein the apparatus for video source encoding is configured to:

generate a first source encoded bit-stream portion representative of a first video frame, the first source encoded bit-stream portion comprising picture header data for the first video frame and corresponding source encoded picture data for the whole of the first video frame;

generate a second source encoded bit-stream portion, the second source encoded bit-stream portion comprising a repeat of at least a part of the picture header data for the first video frame; and

provide the second source encoded bit-stream portion in the source encoded bit-stream subsequent to and outside the first source encoded bit-stream portion without a repeat of the corresponding source encoded picture data for the whole of the first video frame.

25. An encoder configured to:

generate a first source encoded bit-stream portion representative of a first video frame, the first source encoded bit-stream portion comprising picture header data for the first video frame and corresponding source encoded picture data for the whole of the first video frame;

generate a second source encoded bit-stream portion, the second source encoded bit-stream portion comprising a repeat of at least a part of the picture header data for the first video frame; and

provide the second source encoded bit-stream portion in the source encoded bit-stream subsequent to and outside the first source encoded bit-stream portion without a repeat of the corresponding source encoded picture data for the whole of the first video frame.

26. Apparatus for video source encoding comprising:

means for generating a first source encoded bit-stream portion representative of a first video frame, the first source encoded bit-stream portion comprising picture header data for the first video frame and corresponding source encoded picture data for the whole of the first video frame;

means for generating a second source encoded bit-stream portion, the second source encoded bit-stream portion comprising a repeat of at least a part of the picture header data for the first video frame; and

means for providing the second source encoded bit-stream portion in the source encoded bit-stream subsequent to and outside the first source encoded bit-stream portion without a repeat of the corresponding source encoded picture data for the whole of the first video frame.

27. Apparatus for video source encoding, comprising a controller configured to:

generate a first source encoded bit-stream portion representative of a first video frame, the first source encoded bit-stream portion comprising picture header data for the first video frame and corresponding source encoded picture data for the whole of the first video frame;

generate a second source encoded bit-stream portion, the second source encoded bit-stream portion comprising a repeat of at least a part of the picture header data for the first video frame; and

provide the second source encoded bit-stream portion in the source encoded bit-stream subsequent to and outside the first source encoded bit-stream portion without a repeat of the corresponding source encoded picture data for the whole of the first video frame.

28. A method of video source encoding, using an apparatus, the method comprising:

generating, using the apparatus, a first source encoded bit-stream portion representative of a first video frame, the first source encoded bit-stream portion comprising picture header data for the first video frame and corresponding source encoded picture data for the whole of the first video frame;

generating, using the apparatus, a second source encoded bit-stream portion representative of a second video frame subsequent to the first video frame in encoding order, the second source encoded bit-stream portion comprising picture header data for the second video frame, picture data for the whole of the second video frame and a repeat of at least a part of the picture header data for the first video frame; and

providing, using the apparatus, the second source encoded bit-stream portion in the source encoded bit-stream subsequent to the first source encoded bit-stream portion.

29. A method according to claim 28, comprising providing, using the apparatus, a repeat of at least a part of the picture header data for the first video frame in the picture header data of the subsequent video frame.

30. A method according to claim 29, comprising repeating, using the apparatus, only certain fields of the picture header data for the first video frame in the picture header data of the subsequent video frame.

31. A method according to claim 28, comprising providing, using the apparatus., a repeat of at least a part of the picture header data for the first video frame in Supplemental Enhancement Information of the subsequent video frame.

32. A method according to claim 31, comprising providing, using the apparatus, a repeat of at least a part of the picture header data for the first video frame in the Supplemental Enhancement Information of the subsequent video frame, excluding the picture start code for the first video frame.

33. An encoder configured to:

generate a first source encoded bit-stream portion representative of a first video frame, the first source encoded bit-stream portion comprising picture header data for the first video frame and corresponding source encoded picture data for the whole of the first video frame;

generate a second source encoded bit-stream portion representative of a second video frame subsequent to the first video frame in encoding order, the second source encoded bitstream portion comprising picture header data for the second video frame, picture data for the whole of the second video frame and a repeat of at least a part of the picture header data for the first video frame; and

provide the second source encoded bit-stream portion in the source encoded bit-stream subsequent to the first source encoded bit-stream portion.

34. An encoder according to claim 33, wherein the encoder is configured to provide a repeat of at least a part of the picture header data for the first video frame in the picture header data for the subsequent video frame.

35. An encoder according to claim 34, wherein the encoder is configured to repeat only certain fields of the picture header data for the first video frame in the picture header data of the subsequent video frame.

36. An encoder according to claim 33, wherein the encoder is configured to provide a repeat of at least a part of the picture header data for the first video frame in Supplemental Enhancement Information of the subsequent video frame.

37. An encoder according to claim 36, wherein the encoder is configured to provide a repeat of at least a part of the picture header data for the first video frame in the Supplemental Enhancement Information of the subsequent video frame, excluding the picture start code for the first video frame.

38. An encoder comprising:

means for generating a first source encoded bit-stream portion representative of a first video frame, the first source encoded bit-stream portion comprising picture header data for the first video frame and corresponding source encoded picture data for the whole of the first video frame;

means for generating a second source encoded bit-stream portion representative of a second video frame subsequent to the first video frame in encoding order, the second source encoded bit-stream portion comprising picture header data for the second video frame, picture data for the whole of the second video frame and a repeat of at least a part of the picture header data for the first frame; and

means for providing the second source encoded bit-stream portion in the source encoded bit-stream subsequent to the first source encoded bit-stream portion.

39. An encoder comprising a controller configured to:

generate a first source encoded bit-stream portion representative of a first video frame, the first source encoded bit-stream portion comprising picture header data for the first video frame and corresponding source encoded picture data for the whole of the first video frame;

generate a second source encoded bit-stream portion representative of a second video frame subsequent to the first video frame in encoding order, the second source encoded bit-stream portion comprising picture header data for the second video frame, picture data for the whole of the second video frame and a repeat of at least a part of the picture header data for the first video frame; and

provide the second source encoded bit-stream portion in the source encoded bit-stream subsequent to the first source encoded bit-stream portion.

40. A method of video source encoding using an apparatus, the method comprising:

generating, using the apparatus, a first source encoded bit-stream portion representative of a first video frame, the first source encoded bit-stream portion comprising picture header data for the first video frame and corresponding source encoded picture data for the whole of the first video frame;

applying, using the apparatus an error correcting code to the picture header data for the first video frame to generate error correction data;

generating, using the apparatus, a second source encoded bit-stream portion representative of a second video frame subsequent to the first video frame in encoding order, the second source encoded bit-stream portion comprising picture header data for the second video frame and picture data for the whole of the second video frame; and

providing, using the apparatus, the error correction data in Supplemental Enhancement Information of the second video frame.

41. An encoder configured to:

generate a first source encoded bit-stream portion representative of a first video frame, the first source encoded bit-stream portion comprising picture header data for the first video frame and corresponding source encoded picture data for the whole of the first video frame;

apply an error correcting code to the picture header data for the first video frame to generate error correction data;

generate a second source encoded bit-stream portion representative of a second video frame subsequent to the first video frame in encoding order, the second source encoded bitstream portion comprising picture header data for the second video frame and picture data for the whole of the second video frame; and

provide the error correction data in Supplemental Enhancement Information of the second video frame.