Marking pictures for inter-layer prediction

Patent metadata

Field	Value
Publication number	US-9351009-B2
Application number	US-201313857986-A
Country	US
Kind code	B2
Filing date	Apr 5, 2013
Priority date	Apr 5, 2013
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

A method for video coding is described. Signaling of a maximum number of sub-layers for inter-layer prediction is obtained. A sub-layer non-reference picture is also obtained. It is determined whether a value of a temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction minus 1. The sub-layer non-reference picture is marked as “unused for reference” if the value of the temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction minus 1. In some cases a sub-layer non-reference picture is also obtained. It is determined whether a value of a temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction. The sub-layer non-reference picture is marked as “unused for reference” if the value of the temporal identifier of the sub-layer non-reference picture is greater than the maximum number of sub-layers for inter-layer prediction.

First claim

What is claimed is:

1. A method for video decoding using circuitry, comprising:
receiving a maximum number of sub-layers for inter-layer prediction, wherein the maximum number of sub-layers for inter-layer prediction indicates whether non-random access point (non-RAP) pictures with a layer identifier equal to a layer identifier syntax element value are used as pictures for inter-layer prediction;
determining whether a picture of a reference picture layer is marked as “used for long-term reference”; wherein
the picture of the reference picture layer is marked as “used for long-term reference” in a case that the value of the maximum number of sub-layers for inter-layer prediction is equal to zero and the picture of the reference picture layer is a random access point (RAP) picture,
the picture of the reference picture layer is not marked as “used for long-term reference” in a case that at least the picture of the reference picture layer is not the RAP picture; and
outputting a decoded picture decoded by using the picture of the reference picture layer.

2. The method of claim 1 , wherein the maximum number of sub-layers for inter-layer prediction has an index of [i].

3. The method of claim 1 , wherein the method is performed by a decoder within an electronic device.

4. The method of claim 3 , wherein the decoder conforms to a high efficiency video coding (HEVC) standard.

5. The method of claim 3 , wherein the decoder conforms to a scalable high efficiency video coding (SHVC) standard.

6. The method of claim 3 , wherein the decoder conforms to a Multi-View high efficiency video coding (MV-HEVC) standard.

7. An electronic device configured for video decoding, comprising:
a processor;
memory in electronic communication with the processor, wherein instructions stored in the memory are executable to:
receive of a maximum number of sub-layers for inter-layer prediction, wherein the maximum number of sub-layers for inter-layer prediction indicates whether non-random access point (non-RAP) pictures with a layer identifier equal to a layer identifier syntax element value are used as reference pictures for inter-layer prediction; and
determine whether a picture of a reference picture layer is marked as “used for long-term reference” wherein

the picture of the reference picture layer is marked as “used for long-term reference” in a case that the maximum number of sub-layers for inter-layer prediction is equal to zero and the picture of the reference picture layer is a random access point (RAP) picture, and
the picture of the reference picture layer is not marked as “used for long-term reference” in a case that at least the picture of the reference picture layer is not the RAP picture.

8. The electronic device of claim 7 , wherein the maximum number of sub-layers for inter-layer prediction has an index of [i].

9. The electronic device of claim 7 , further comprising a decoder.

10. The electronic device of claim 9 , wherein the decoder conforms to a high efficiency video coding (HEVC) standard.

11. The electronic device of claim 9 , wherein the decoder conforms to a scalable high efficiency video coding (SHVC) standard.

12. The electronic device of claim 9 , wherein the decoder conforms to a Multi-View high efficiency video coding (MV-HEVC) standard.

Assignees

• Sharp Kk

Inventors

• Deshpande Sachin G

Classifications

• H04N19/503 Primary

  involving temporal prediction (adaptive coding with adaptive selection between spatial and temporal predictive coding H04N19/107; adaptive coding with adaptive selection among a plurality of temporal predictive coding modes H04N19/109) · CPC title

• H04N19/31 Primary

  in the temporal domain · CPC title

• H04N19/597

  specially adapted for multi-view video sequence encoding · CPC title

• H04N19/70

  characterised by syntax aspects related to video coding, e.g. related to compression standards · CPC title

• H04N19/44

  Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder · CPC title