SIGNALING CHANGE IN OUTPUT LAYER SETS

• US 20160044324A1
• Filed: 04/04/2014
• Published: 02/11/2016
• Est. Priority Date: 04/07/2013
• Status: Active Grant

• Current Assignee: Dolby International AB (Dolby Laboratories Incorporated)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Deshpande, Sachin G.
• Granted Patent: US 10,194,160 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04N 19/172 the region being a picture, frame or field
• CPC Class Codes: H04N 19/177 the unit being a group of pictures [GOP]
• CPC Class Codes: H04N 19/30 using hierarchical techniques, e.g. scalability H04N19/63 takes precedence
• CPC Class Codes: H04N 19/423 characterised by memory arrangements H04N19/433 takes precedence
• CPC Class Codes: H04N 19/44 Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards

Abstract

A system for decoding a video bitstream includes receiving a bitstream and a plurality of enhancement bitstreams together with receiving a video parameter set and a video parameter set extension. The system also receives an output layer set change message including information indicating a change in at least one output layer set.

Claims

1-19. -19. (canceled)

20. A method for video coding, comprising:

beginning to parse a first slice header of a current picture;

determining which steps performed by a decoded picture buffer (DPB) will be picture based and which steps will be access unit (AU) based;

performing a removal from the DPB;

performing a picture output from the DPB;

performing a decoding and storing of a current decoded picture in the DPB;

marking the current decoded picture in the DPB; and

performing an additional picture output from the DPB.

21. The method of claim 20, wherein the removal and the output from the DPB is based on at least one AU output flag.

22. The method of claim 21, wherein the AU output flag is one of an AU output flag, an AU no RASL output flag and an AU no output of prior pictures flag.

23. The method of claim 21, wherein the AU output flag is obtained from the first slice header.

26. The method of claim 20, wherein all picture output flag syntax element values are constrained to the same value for all coded pictures in an AU when a picture output flag is present in the first slice header.

28. The method of claim 20, wherein the removal is picture based, wherein the picture output is AU based, wherein the storing and decoding are picture based, wherein the marking is picture based, and wherein the additional picture output is AU based.

31. The method of claim 20, wherein the removal, the picture output, the decoding and storing, the marking and the additional picture output are AU based.

32. The method of claim 20, wherein the removal, the decoding and storing and the marking are picture based, and wherein the picture output and the additional picture output are AU based.

33. The method of claim 20, wherein the removal, the picture output, the decoding and storing, the marking and the additional picture output are picture based.

39. The method of claim 20, wherein the DPB comprises separately identified and managed picture buffers for decoded pictures having one or more of different resolutions, different bit-depths and different color chromaticity.

24-25. -25. (canceled)

27. (canceled)

29-30. -30. (canceled)

34-38. -38. (canceled)

40-43. -43. (canceled)

44. An electronic device configured for video coding, comprising:

a processor;

memory in electronic communication with the processor, wherein instructions stored in the memory are executable to;

begin to parse a first slice header of a current picture;

determine which steps performed by a decoded picture buffer (DPB) will be picture based and which steps will be access unit (AU) based;

perform a removal from the DPB;

perform a picture output from the DPB;

perform a decoding and storing of a current decoded picture in the DPB;

mark the current decoded picture in the DPB; and

perform an additional picture output from the DPB.

45. The electronic device of claim 44, wherein the removal and the output from the DPB is based on at least one AU output flag.

46. The electronic device of claim 45, wherein the AU output flag is one of an AU output flag, an AU no RASL output flag and an AU no output of prior pictures flag.

47. The electronic device of claim 45, wherein the AU output flag is obtained from the first slice header.

50. The electronic device of claim 44, wherein all picture output flag syntax element values are constrained to the same value for all coded pictures in an AU when a picture output flag is present in the first slice header.

52. The electronic device of claim 44, wherein the removal is picture based, wherein the picture output is AU based, wherein the storing and decoding are picture based, wherein the marking is picture based, and wherein the additional picture output is AU based.

55. The electronic device of claim 44, wherein the removal, the picture output, the decoding and storing, the marking and the additional picture output are AU based.

56. The electronic device of claim 44, wherein the removal, the decoding and storing and the marking are picture based, and wherein the picture output and the additional picture output are AU based.

57. The electronic device of claim 44, wherein the removal, the picture output, the decoding and storing, the marking and the additional picture output are picture based.

63. The electronic device of claim 44, wherein the DPB comprises separately identified and managed picture buffers for decoded pictures having one or more of different resolutions, different bit-depths and different color chromaticity.

48-49. -49. (canceled)

51. (canceled)

53-54. -54. (canceled)

58-62. -62. (canceled)

64-67. -67. (canceled)