USING AN AVERAGE MOTION VECTOR FOR A MOTION SEARCH

• US 20140177716A1
• Filed: 12/21/2012
• Published: 06/26/2014
• Est. Priority Date: 12/21/2012
• Status: Active Grant

• Current Assignee: NVIDIA Corporation
• Original Assignee: NVIDIA Corporation
• Inventors: Chen, Jianjun, He, Xi, Yu, Xinyang, Fan, Hank
• Granted Patent: US 10,602,175 B2
• Time in Patent Office: Days
• US Class Current: 375/240.16
• CPC Class Codes: H04N 19/513 Processing of motion vectors
• CPC Class Codes: H04N 19/56 Motion estimation with initialisation of the vector search, e.g. estimating a good candidate to initiate a search

Abstract

A method for using an average motion vector in a motion vector search process. The method includes accessing an input frame for processing and reading average motion vector information from memory. The method further includes performing a motion vector search by using the average motion vector and a plurality of hints, calculating a winner motion vector based on the average motion vector and the plurality of hints, and storing the winner motion vector back into memory to create a new updated average motion vector. The method further includes finishing processing the input frame using the winning motion vector.

Claims

1. A method for using an average motion vector in a motion vector search process, comprising:

accessing an input frame for processing;

reading average motion vector information from memory;

performing a motion vector search by using the average motion vector and a plurality of hints;

calculating a winner motion vector based on the average motion vector and the plurality of hints;

storing the winner motion vector back into memory to create a new updated average motion vector; and

finishing processing the input frame using the winning motion vector.

2. The method of claim 1, wherein the motion vector search process implements a video compression process.

3. The method of claim 1, wherein the average motion vector comprises an average of a plurality of prior winning motion vectors.

4. The method of claim 1, wherein the motion vector search process is performed on a macro block.

5. The method of claim 1, wherein a plurality of winner motion vector values are chelated and an average motion vector hint is calculated before encoding a current frame.

6. The method of claim 1, wherein the motion vector search process is implemented in a GPU.

7. The method of claim 1, wherein the average motion vector is scaled based on a distance between a current frame and a reference frame.

8. A non-transitory computer readable media having computer readable code which when executed by a computer system causes said computer system to implement a method for using an average motion vector in a motion vector search process, comprising:

accessing an input frame for processing;

reading average motion vector information from memory;

performing a motion vector search by using the average motion vector and a plurality of hints;

calculating a winner motion vector based on the average motion vector and the plurality of hints;

storing the winner motion vector back into memory to create a new updated average motion vector; and

finishing processing the input frame using the winning motion vector.

9. The non-transitory computer readable media of claim 8, wherein the motion vector search process implements a video compression process.

10. The non-transitory computer readable media of claim 8, wherein the average motion vector comprises an average of a plurality of prior winning motion vectors.

11. The non-transitory computer readable media of claim 8, wherein the motion vector search process is performed on a macro block.

12. The non-transitory computer readable media of claim 8, wherein a plurality of winner motion vector values are chelated and an average motion vector hint is calculated before encoding a current frame.

13. The non-transitory computer readable media of claim 8, wherein the motion vector search process is implemented in a GPU.

14. The non-transitory computer readable media of claim 8, wherein the average motion vector is scaled based on a distance between a current frame and a reference frame.

15. A computer system, comprising:

a computer system having a processor coupled to a computer readable storage media and executing computer readable code which causes the computer system to;

access an input frame for processing;

read average motion vector information from memory;

perform a motion vector search by using the average motion vector and a plurality of hints;

calculate a winner motion vector based on the average motion vector and the plurality of hints;

store the winner motion vector back into memory to create a new updated average motion vector; and

finish processing the input frame using the winning motion vector.

16. The computer system of claim 15, wherein the motion vector search process implements a video compression process.

17. The computer system of claim 15, wherein the average motion vector comprises an average of a plurality of prior winning motion vectors.

18. The computer system of claim 15, wherein the motion vector search process is performed on a macro block.

19. The computer system of claim 15, wherein a plurality of winner motion vector values are chelated and an average motion vector hint is calculated before encoding a current frame.

20. The computer system of claim 15, wherein the average motion vector is scaled based on a distance between a current frame and a reference frame.