DEBLOCKING FILTER DESIGN FOR INTRA BLOCK COPY

• US 20150373362A1
• Filed: 06/18/2015
• Published: 12/24/2015
• Est. Priority Date: 06/19/2014
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Pang, Chao, Chen, Ying, Sole Rojals, Joel, Karczewicz, Marta
• Application Number:
  US14/743,722
• Publication Number:
  US 20150373362A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04N 19/117 Filters, e.g. for pre-processing or post-processing sub-band filter banks H04N19/635
• CPC Class Codes: H04N 19/159 Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/187 the unit being a scalable video layer
• CPC Class Codes: H04N 19/82 involving filtering within a prediction loop
• CPC Class Codes: H04N 19/86 involving reduction of coding artifacts, e.g. of blockiness

Abstract

A video coding device may encode and/or decode video data. The video coding device encodes a first video block in a first picture by predicting values of the first video block based on a previously encoded video block in a second picture different than the first picture. The video coding device filters the first video block according to a deblocking filtering process. The video coding device encodes a second video block in the first picture by predicting values of the second video block based on a previously encoded video block in the first picture. The video coding device filters the second video block according to the deblocking filtering process. The video coding device decodes the first video block, filters the first video block according to the deblocking filtering process, decodes the second video block, and filters the second video block according to the deblocking filtering process.

Claims

1. A method of decoding video data, the method comprising:

decoding a first video block in a first picture, wherein decoding the first video block includes predicting values of the first video block based on a previously decoded video block in a second picture, wherein the second picture is different than the first picture;

filtering the first video block according to a deblocking filtering process;

decoding a second video block in the first picture, wherein decoding the second video block includes predicting values of the second video block based on a previously decoded video block in the first picture; and

filtering the second video block according to the deblocking filtering process.

2. The method of claim 1, further comprising setting a reference index for the second video block to a value such that the reference index indicates that the second video block in the first picture is predicted based on the previously decoded video block in the first picture.

3. The method of claim 1, further comprising determining a block vector, wherein the block vector comprises a motion vector between the second video block in the first picture and the previously decoded video block in the first picture.

4. The method of claim 1, further comprising:

decoding a third video block in the first picture, wherein decoding the third video block includes predicting values of the third video block based on a previously decoded video block in the first picture and a previously decoded video block in a third picture, wherein the third picture is different than the first picture; and

filtering the third video block according to the deblocking filtering process.

5. The method of claim 4, wherein the third video block is a bi-directional predictive block.

6. The method of claim 1, further comprising:

decoding a third video block in the first picture, wherein decoding the third video block includes predicting values of the third video block in the first picture based on a second previously decoded video block in the first picture, and wherein the second previously decoded video block in the first picture was decoded based on a third previously decoded video block in the first picture and an Intra coding mode;

filtering the third video block according to a second deblocking filtering process.

7. The method of claim 1, wherein the previously decoded block in the first picture was decoded based on a previously decoded block in a third picture, wherein the third picture is different than the first picture.

8. A device for decoding video data, the device comprising:

a memory configured to store the video data; and

one or more processors configured to;

decode a first video block in a first picture, wherein decoding the first video block includes predicting values of the first video block based on a previously decoded video block in a second picture, wherein the second picture is different than the first picture;

filter the first video block according to a deblocking filtering process;

decode a second video block in the first picture, wherein decoding the second video block includes predicting values of the second video block based on a previously decoded video block in the first picture; and

filter the second video block according to the deblocking filtering process.

9. The device of claim 8, wherein the one or more processors are further configured to set a reference index for the second video block to a value such that the reference index indicates that the second video block in the first picture is predicted based on the previously decoded video block in the first picture.

10. The device of claim 8, wherein the one or more processors are further configured to determine a block vector, wherein the block vector comprises a motion vector between the second video block in the first picture and the previously decoded video block in the first picture.

11. The device of claim 8, wherein the one or more processors are further configured to:

decoding a third video block in the first picture, wherein decoding the third video block includes predicting values of the third video block based on a previously decoded video block in the first picture and a previously decoded video block in a third picture, wherein the third picture is different than the first picture; and

filtering the third video block according to the deblocking filtering process.

12. The device of claim 11, wherein the third video block is a bi-directional predictive block.

13. The device of claim 8, wherein the one or more processors are further configured to:

decoding a third video block in the first picture, wherein decoding the third video block includes predicting values of the third video block in the first picture based on a second previously decoded video block in the first picture, and wherein the second previously decoded video block in the first picture was decoded based on a third previously decoded video block in the first picture and an Intra coding mode;

filtering the third video block according to a second deblocking filtering process.

14. The device of claim 8, wherein the previously decoded block in the first picture was decoded based on a previously decoded block in a third picture, wherein the third picture is different than the first picture.

15. The device of claim 8, wherein the device comprises at least one of:

an integrated circuit;

a microprocessor;

or

a wireless communication device.

16. The device of claim 8, further comprising a display configured to display decoded pictures of the video data.

17. A computer-readable storage medium encoded with instructions that, when executed, cause one or more processors to:

decode a first video block in a first picture, wherein decoding the first video block includes predicting values of the first video block based on a previously decoded video block in a second picture, wherein the second picture is different than the first picture;

filter the first video block according to a deblocking filtering process;

decode a second video block in the first picture, wherein decoding the second video block includes predicting values of the second video block based on a previously decoded video block in the first picture; and

filter the second video block according to the deblocking filtering process.

18. The computer-readable storage medium of claim 17, further comprising setting a reference index for the second video block to a value such that the reference index indicates that the second video block in the first picture is predicted based on the previously decoded video block in the first picture.

19. The computer-readable storage medium of claim 17, further comprising determining a block vector, wherein the block vector comprises a motion vector between the second video block in the first picture and the previously decoded video block in the first picture.

20. The computer-readable storage medium of claim 17, further comprising:

decoding a third video block in the first picture, wherein decoding the third video block includes predicting values of the third video block based on a previously decoded video block in the first picture and a previously decoded video block in a third picture, wherein the third picture is different than the first picture; and

filtering the third video block according to the deblocking filtering process.

21. The computer-readable storage medium of claim 20, wherein the third video block is a bi-directional predictive block.

22. The computer-readable storage medium of claim 17, further comprising:

decoding a third video block in the first picture, wherein decoding the third video block includes predicting values of the third video block in the first picture based on a second previously decoded video block in the first picture, and wherein the second previously decoded video block in the first picture was decoded based on a third previously decoded video block in the first picture and an Intra coding mode;

filtering the third video block according to a second deblocking filtering process.

23. The computer-readable storage medium of claim 17, wherein the previously decoded block in the first picture was decoded based on a previously decoded block in a third picture, wherein the third picture is different than the first picture.

24. A method of encoding video data, the method comprising:

encoding a first video block in a first picture, wherein encoding the first video block includes predicting values of the first video block based on a previously encoded video block in a second picture, wherein the second picture is different than the first picture;

filtering the first video block according to a deblocking filtering process;

encoding a second video block in the first picture, wherein encoding the second video block includes predicting values of the second video block based on a previously encoded video block in the first picture; and

filtering the second video block according to the deblocking filtering process.

25. The method of claim 24, further comprising setting a reference index for the second video block to a value such that the reference index indicates that the second video block in the first picture is predicted based on the previously encoded video block in the first picture.

26. The method of claim 24, further comprising determining a block vector, wherein the block vector comprises a motion vector between the second video block in the first picture and the previously encoded video block in the first picture.

27. The method of claim 24, further comprising:

encoding a third video block in the first picture, wherein encoding the third video block includes predicting values of the third video block based on a previously encoded video block in the first picture and a previously encoded video block in a third picture, wherein the third picture is different than the first picture; and

filtering the third video block according to the deblocking filtering process.

28. The method of claim 27, wherein the third video block is a bi-directional predictive block.

29. The method of claim 24, further comprising:

encoding a third video block in the first picture, wherein encoding the third video block includes predicting values of the third video block in the first picture based on a second previously encoded video block in the first picture, and wherein the second previously encoded video block in the first picture was encoded based on a third previously encoded video block in the first picture and an Intra coding mode;

filtering the third video block according to a second deblocking filtering process.

30. The method of claim 24, wherein the previously encoded block in the first picture was encoded based on a previously encoded block in a third picture, wherein the third picture is different than the first picture.