Method and apparatus for compressing coding unit in high efficiency video coding

Patent metadata

Field	Value
Publication number	US-9813726-B2
Application number	US-201615335129-A
Country	US
Kind code	B2
Filing date	Oct 26, 2016
Priority date	Jan 25, 2011
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A method for decoding of a video bitstream including receiving coded data for a 2N×2N coding unit (CU) from the video bitstream, selecting one or more first codewords according to whether asymmetric motion partition is disabled or enabled, selecting one or more second codewords when a size of the 2N×2N CU is equal to a smallest CU size, wherein none of the second codewords corresponds to INTER N×N partition when N is 4, determining a CU structure for the 2N×2N CU from the video bitstream using the first codewords or the second codewords, and decoding the video bitstream using the CU structure. A corresponding method for encoding a 2N×2N coding unit of video data is also disclosed.

First claim

The invention claimed is:

1. A method for decoding of a video bitstream by a video decoding circuit, the method comprising:
receiving coded data for a 2N×2N coding unit (CU) from the video bitstream;
selecting one or more first codewords according to whether asymmetric motion partition is disabled or enabled, wherein none of said one or more first codewords corresponds to INTER N×N partition;
selecting one or more second codewords when a size of said 2N×2N CU is equal to a smallest CU size, wherein none of said one or more second codewords corresponds to the INTER N×N partition when N is 4;
determining a CU structure for said 2N×2N CU from the video bitstream using said one or more first codewords or said one or more second codewords; and
decoding the video bitstream using the CU structure.

2. The method of claim 1 , further comprises:
receiving an indication from the video bitstream regarding whether the asymmetric motion partition is disabled or enabled.

3. The method of claim 1 , wherein said one or more first codewords correspond to INTER 2N×2N partition, INTER N×2N partition, and INTER 2N×N partition when the asymmetric motion partition is disabled, wherein said one or more first codewords correspond to INTER 2N×2N partition, INTER 2N×N partition, INTER 2N×nU partition, INTER 2N×nD partition, INTER N×2N partition, INTER nL×2N partition, and INTER nR×2N partition when the asymmetric motion partition is enabled.

4. The method of claim 1 , wherein said one or more first codewords correspond to INTER 2N×2N partition, INTER N×2N partition, INTER 2N×N partition when the asymmetric motion partition is disabled and the size of said 2N×2N CU is larger than the smallest CU size, wherein said one or more first codewords correspond to INTER 2N×2N partition, INTER 2N×N partition, INTER 2N×nU partition, INTER 2N×nD partition, INTER N×2N partition, INTER nL×2N partition, and INTER nR×2N partition when the asymmetric motion partition is enabled and the size of said 2N×2N CU is larger than the smallest CU size.

5. The method of claim 1 , wherein said one or more first codewords and said one or more second codewords are used for entropy decoding based on CABAC (Context-Adaptive Binary Arithmetic Coding) or CAVLC (Context-Adaptive Variable-Length Coding).

6. A method of processing coding units of video data by a video encoding circuit, the method comprising:
receiving input data associated with a 2N×2N coding unit (CU);
selecting one or more first codewords according to whether asymmetric motion partition is disabled or enabled, wherein none of said one or more first codewords corresponds to INTER N×N partition;
selecting one or more second codewords when a size of said 2N×2N CU is equal to a smallest CU size, wherein none of said one or more second codewords corresponds to the INTER NxN partition when N is 4;
determining a CU structure for said 2N×2N CU; and
encoding the CU structure using said one or more first codewords or said one or more second codewords.

7. The method of claim 6 , further comprises:
determining whether the asymmetric motion partition is disabled or enabled; and
transmitting an indication in a video bitstream regarding whether the asymmetric motion partition is disabled or enabled.

8. The method of claim 6 , wherein said one or more first codewords correspond to INTER 2N×2N partition, INTER N×2N partition, and INTER 2N×N partition when the asymmetric motion partition is disabled, wherein said one or more first codewords correspond to INTER 2N×2N partition, INTER 2N×N partition, INTER 2N×nU partition, INTER 2N×nD partition, INTER N×2N partition, INTER nL×2N partition, and INTER nR×2N partition when the asymmetric motion partition is enabled.

9. The method of claim 6 , wherein said one or more first codewords correspond to INTER 2N×2N partition, INTER N×2N partition, INTER 2N×N partition when the asymmetric motion partition is disabled and the size of said 2N×2N CU is larger than the smallest CU size, wherein said one or more first codewords correspond to INTER 2N×2N partition, INTER 2N×N partition, INTER 2N×nU partition, INTER 2N×nD partition, INTER N×2N partition, INTER nL×2N partition, and INTER nR×2N partition when the asymmetric motion partition is enabled and the size of said 2N×2N CU is larger than the smallest CU size.

10. The method of claim 6 , wherein said one or more first codewords and said one or more second codewords are used for entropy encoding based on CABAC (Context-Adaptive Binary Arithmetic Coding) or CAVLC (Context-Adaptive Variable-Length Coding).

11. A non-transitory computer readable medium storing a computer-executable program, the computer-executable program, when executed, causing a decoder to perform the following steps:
receiving coded data for a 2N×2N coding unit (CU) from the video bitstream;
selecting one or more first codewords according to whether asymmetric motion partition is disabled or enabled, wherein none of said one or more first codewords corresponds to INTER N×N partition;
selecting one or more second codewords when a size of said 2N×2N CU is equal to a smallest CU size, wherein none of said one or more second codewords corresponds to the INTER N×N partition when N is 4;
determining a CU structure for said 2N×2N CU from the video bitstream using said one or more first codewords or said one or more second codewords; and
decoding the video bitstream using the CU structure.

12. The non-transitory computer-readable medium of claim 11 , wherein the decoder is further configured by the computer-executable program to receive an indication from the video bitstream regarding whether the asymmetric motion partition is disabled or enabled.

13. The non-transitory computer-readable storage medium of claim 11 , wherein said one or more first codewords correspond to INTER 2N×2N partition, INTER N×2N partition, and INTER 2N×N partition when the asymmetric motion partition is disabled, wherein said one or more first codewords correspond to INTER 2N×2N partition, INTER 2N×N partition, INTER 2N×nU partition, INTER 2N×nD partition, INTER N×2N partition, INTER nL×2N partition, and INTER nR×2N partition when the asymmetric motion partition is enabled.

14. The non-transitory computer-readable medium of claim 11 , wherein said one or more first codewords correspond to INTER 2N×2N partition, INTER N×2N partition, INTER 2N×N partition when the asymmetric motion partition is disabled and the size of said 2N×2N CU is larger than the smallest CU size, wherein said one or more first codewords correspond to INTER 2N×2N partition, INTER 2N×N partition, INTER 2N×nU partition, INTER 2N×nD partition, INTER N×2N partition, INTER nL×2N partition, and INTER nR×2N partition when the asymmetric motion partition is enabled and the size of said 2N×2N CU is larger than the smallest CU size.

15. The non-transitory computer-readable medium of claim 11 , wherein said one or more first codewords and said one or more second codewords are used for entropy decoding based on CABAC (Context-Adaptive Binary Arithmetic Coding) or CAVLC (Context-Adaptive Variable-Length Coding).

Assignees

• Hfi Innovation Inc

Inventors

• Liu Shan
• Huang Yu-Wen
• Lei Shaw-Min

Classifications

• H04N19/44

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

• H04N19/463

  by compressing encoding parameters before transmission · CPC title

• H04N19/51 Primary

  Motion estimation or motion compensation · CPC title

• H04N19/13

  Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC] · CPC title

• H04N19/176 Primary

  the region being a block, e.g. a macroblock · CPC title