Hierarchy of motion prediction video blocks

Patent metadata

Field	Value
Publication number	US-10171813-B2
Application number	US-201213402719-A
Country	US
Kind code	B2
Filing date	Feb 22, 2012
Priority date	Feb 24, 2011
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

A video decoder is configured to obtain an index value for a current video block. The video decoder obtains a partition type for a current video block. The video decoder selects one of a plurality of defined sets of ordered candidate predictive video blocks based on the partition type of the current video block. A video decoder selects a predictive video block from a selected one of the plurality of defined sets of ordered candidate predictive video blocks based on an index value. A video decoder generates a motion vector for a current video block based on motion information of the predictive video block.

First claim

What is claimed is:

1. A method of decoding video data according to a merge mode, the method comprising:
obtaining an index value for a current video block coded in the merge mode;
generating a set of candidate predictive blocks for the merge mode based on spatial and temporal neighbors to the current video block;
limiting the set of generated candidate predictive blocks for the merge mode to a subset of generated candidate predictive blocks for the merge mode, wherein the subset of generated candidate predictive blocks for the merge mode is limited to be smaller than the set of generated candidate predictive blocks for the merge mode;
selecting a predictive video block from the subset of generated candidate predictive blocks for the merge mode based on the index value; and
generating motion information for the current video block according to the merge mode based on motion information of the predictive video block, wherein generating the motion information for the current video block includes inheriting motion information from the predictive video block.

2. The method of claim 1 , wherein the subset of generated candidate predictive blocks includes three candidate predictive blocks.

3. The method of claim 2 , wherein the set of generated candidate predictive blocks includes: an adjacent left video block to the current video block, an adjacent upper video block to the current video block, an adjacent upper-right video block to the current video block, an adjacent lower-left video block to the current video block, and an adjacent temporal video block to the current video block.

4. The method of claim 1 , wherein inheriting the motion information includes inheriting a motion vector and a reference frame index from the predictive video block.

5. A device for decoding video data according to a merge mode, the device comprising:
a memory configured to store video data; and
a video decoder configured to communicate with the memory and to:
obtain an index value for the current video block coded in the merge mode;
generate a set of candidate predictive blocks for the merge mode based on spatial and temporal neighbors to the current video block;
limit the set of generated candidate predictive blocks for the merge mode to a subset of generated candidate predictive blocks for the merge mode, wherein the subset of generated candidate predictive blocks for the merge mode is limited to be smaller than the set of generated candidate predictive blocks for the merge mode;
select a predictive video block from the subset of generated candidate predictive blocks for the merge mode based on the index value; and
generate motion information for the current video block according to the merge mode based on motion information of the predictive video block, wherein generating the motion information for the current video block includes inheriting a motion vector from the predictive video block.

6. The device of claim 5 , wherein the subset of generated candidate predictive blocks includes three candidate predictive blocks.

7. The device of claim 6 , wherein the set of generated candidate predictive blocks includes: an adjacent left video block to the current video block, an adjacent upper video block to the current video block, an adjacent upper-right video block to the current video block, an adjacent lower-left video block to the current video block, and an adjacent temporal video block to the current video block.

8. The device of claim 1 , wherein configured to inherit the motion information includes configured to inherit a motion vector and a reference frame index from the predictive video block.

9. The device of claim 5 , wherein the device comprises at least one of:
an integrated circuit;
a microprocessor; and
a wireless communication device that includes the video decoder.

10. A device for decoding video data according to a merge mode, the device comprising:
means for storing video data;
means for obtaining an index value for a current video block coded in the merge mode;
means for generating a set of candidate predictive blocks for the merge mode based on spatial and temporal neighbors to the current video block;
means for limiting the set of generated candidate predictive blocks for the merge mode to a subset of generated candidate predictive blocks for the merge mode, wherein the subset of generated candidate predictive blocks for the merge mode is limited to be smaller than the set of generated candidate predictive blocks for the merge mode;
means for selecting a predictive video block from the subset of generated candidate predictive blocks for the merge mode based on the index value; and
means for generating motion information for the current video block according to the merge mode based on motion information of the predictive video block, wherein the means for generating the motion information for the current video block includes means for inheriting motion information from the predictive video block.

11. The device of claim 10 , wherein the subset of generated candidate predictive blocks includes three candidate predictive blocks.

12. The device of claim 11 , wherein the set of generated candidate predictive blocks includes: an adjacent left video block to the current video block, an adjacent upper video block to the current video block, an adjacent upper-right video block to the current video block, an adjacent lower-left video block to the current video block, and an adjacent temporal video block to the current video block.

13. The device of claim 10 , wherein means for inheriting the motion information includes means for inheriting a motion vector and a reference frame index from the predictive video block.

14. A computer program product comprising a non-transitory computer-readable storage medium having stored thereon instructions that, when executed, cause a processor of a device for decoding video data according to a merge mode to:
obtain an index value for a current video block coded in the merge mode;
generate a set of candidate predictive blocks for the merge mode based on spatial and temporal neighbors to the current video block;
limit the set of generated candidate predictive blocks for the merge mode to a subset of generated candidate predictive blocks for the merge mode, wherein the subset of generated candidate predictive blocks for the merge mode is limited to be smaller than the set of generated candidate predictive blocks for the merge mode;
select a predictive video block from the subset of generated candidate predictive blocks for the merge mode based on the index value; and
generate motion information for the current video block according to the merge mode based on motion information of the predictive video block, wherein generating the motion information for the current video block includes inheriting a motion vector from the predictive video block.

15. The computer program product of claim 14 , wherein the subset of generated candidate predictive blocks includes three candidate predictive blocks.

16. The computer program product of claim 15 , wherein the set of generated candidate predictive blocks includes: an adjacent left video block to the current video block, an adjacent upper video block to the current video block, an adjacent upper-right video block to the current video block, an adjacent lower-left video block to the current video block, and an adjacent temporal video block to the current video block.

17. The computer program product of claim 14 , wherein the instructions that, when executed, cause a processor to inherit the motion inf

Assignees

• Zheng Yunfei
• Chien Wei Jung
• Karczewicz Marta
• Qualcomm Inc

Inventors

• Zheng Yunfei
• Chien Wei-Jung
• Karczewicz Marta

Classifications

• H04N19/105

  Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction · CPC title

• H04N19/176

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

• H04N19/51

  Motion estimation or motion compensation · CPC title

• H04N19/157 Primary

  Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter · CPC title

• H04N19/503

  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