INTRA PULSE CODE MODULATION (IPCM) AND LOSSLESS CODING MODE DEBLOCKING FOR VIDEO CODING

• US 20130101025A1
• Filed: 10/18/2012
• Published: 04/25/2013
• Est. Priority Date: 10/20/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Van der Auwera, Geert, Karczewicz, Marta, Wang, Xianglin
• Granted Patent: US 9,510,020 B2
• Time in Patent Office: Days
• US Class Current: 375/240.03
• 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 19/12 Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
• CPC Class Codes: H04N 19/157 Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/182 the unit being a pixel
• CPC Class Codes: H04N 19/593 involving spatial prediction techniques
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards
• 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

Techniques for coding video data include coding a plurality of blocks of video data, wherein at least one block of the plurality of blocks of video data is coded using a coding mode that is one of an intra pulse code modulation (IPCM) coding mode and a lossless coding mode. In some examples, the lossless coding mode may use prediction. The techniques further include assigning a non-zero quantization parameter (QP) value for the at least one block coded using the coding mode. The techniques also include performing deblocking filtering on one or more of the plurality of blocks of video data based on the coding mode used to code the at least one block and the assigned non-zero QP value for the at least one block.

Claims

1. A method of coding video data comprising:

coding a plurality of blocks of video data, wherein at least one block of the plurality of blocks of video data is coded using a coding mode that comprises one of an intra pulse code modulation (IPCM) coding mode and a lossless coding mode that uses prediction;

assigning a non-zero quantization parameter (QP) value for the at least one block coded using the coding mode; and

performing deblocking filtering on one or more of the plurality of blocks of video data based on the coding mode used to code the at least one block and the assigned non-zero QP value for the at least one block.

2. The method of claim 1, wherein performing the deblocking filtering on the one or more of the plurality of blocks of video data based on the coding mode used to code the at least one block and the assigned non-zero QP value comprises:

if the coding mode used to code the at least one block comprises the IPCM coding mode, performing the deblocking filtering on the at least one block based on the assigned non-zero QP value; and

if the coding mode used to code the at least one block comprises the lossless coding mode, performing the deblocking filtering on an adjacent block of the plurality of blocks of video data, the adjacent block located adjacent to the at least one block and coded using a lossy coding mode, based on the assigned non-zero QP value.

3. The method of claim 2, wherein performing the deblocking filtering on each of the at least one block and the adjacent block based on the assigned non-zero QP value comprises selecting a filter for the deblocking filtering based on the assigned non-zero QP value.

4. The method of claim 2, wherein performing the deblocking filtering on each of the at least one block and the adjacent block based on the assigned non-zero QP value comprises determining a filter strength for the deblocking filtering based on the assigned non-zero QP value.

5. The method of claim 1, further comprising, prior to performing the deblocking filtering on the one or more of the plurality of blocks of video data based on the coding mode used to code the at least one block and the assigned non-zero QP value, enabling the deblocking filtering for the one or more of the plurality of blocks of video data.

6. The method of claim 1, wherein the coding mode comprises the lossless coding mode, the method further comprising disabling deblocking filtering for the at least one block, including not performing the deblocking filtering for internal boundary edges of the at least one block.

7. The method of claim 1, wherein assigning the non-zero QP value for the at least one block comprises determining the assigned non-zero QP value based on one or more of the following:

a signaled QP value for the at least one block, wherein the signaled QP value indicates the assigned non-zero QP value;

a predicted QP value for the at least one block; and

a signaled delta QP value for the at least one block, wherein the delta QP value represents a difference between the assigned non-zero QP value and the predicted QP value.

8. The method of claim 1, wherein the coding mode used to code the at least one block comprises the IPCM coding mode, and wherein assigning the non-zero QP value for the at least one block comprises:

when a size of the at least one block is smaller than a minimum coding unit quantization group size, setting at least one group QP value for a quantization group that includes the at least one block as the assigned non-zero QP value, wherein the quantization group also includes one or more blocks of video data coded using a lossy coding mode; and

when the size of the at least one block is greater than or equal to the minimum coding unit quantization group size, setting a QP value for a neighboring block of the plurality of blocks of video data, the neighboring block comprising one or more of a block located adjacent to the at least one block and a previously coded block, as the assigned non-zero QP value.

9. The method of claim 1, wherein the coding mode used to code the at least one block comprises the IPCM coding mode, and wherein assigning the non-zero QP value for the at least one block comprises:

when a size of the at least one block is smaller than a minimum coding unit quantization group size, setting a QP value for a neighboring block of the plurality of blocks of video data, the neighboring block comprising one or more of a block located adjacent to the at least one block and a previously coded block, as the assigned non-zero QP value.

10. The method of claim 1, wherein the coding mode used to code the at least one block comprises the lossless coding mode, and wherein assigning the non-zero QP value for the at least one block comprises setting one of a QP value and a delta QP value for a lossy block of the plurality of blocks of video data as the assigned non-zero QP value, wherein the delta QP value represents a difference between the QP value and a predicted QP value for the lossy block, the lossy block comprising a block coded using a lossy coding mode.

11. The method of claim 1, wherein the coding mode used to code the at least one block comprises the lossless coding mode, and wherein assigning the non-zero QP value for the at least one block comprises setting a constant value as the assigned non-zero QP value.

12. The method of claim 1, wherein coding comprises decoding, and wherein

decoding the at least one block comprises receiving one of residual un-quantized video data and reconstructed video data of the at least one block in a received bitstream, and

assigning the non-zero QP value for the at least one block comprises one of receiving the assigned non-zero QP value in the received bitstream, and receiving a delta QP value for the at least one block in the received bitstream, the delta QP value representing a difference between the assigned non-zero QP value and a predicted QP value for the at least one block, and determining the assigned non-zero QP value based on the delta QP value and the predicted QP value,

the method further comprising receiving one or more syntax elements in the received bitstream, the one or more syntax elements indicating that the deblocking filtering is enabled for the one or more of the plurality of blocks of video data.

13. The method of claim 12, wherein the coding mode used to code the at least one block comprises the lossless coding mode, and wherein the one or more syntax elements comprise a first one or more syntax elements, the method further comprising receiving a second one or more syntax elements in the received bitstream, the second one or more syntax elements indicating that the deblocking filtering is disabled for the at least one block.

14. The method of claim 1, wherein coding comprises encoding, and wherein

encoding the at least one block comprises signaling one of residual un-quantized video data and reconstructed video data of the at least one block in a bitstream, and

assigning the non-zero QP value for the at least one block comprises one of signaling the assigned non-zero QP value in the bitstream, and signaling a delta QP value for the at least one block in the bitstream, the delta QP value representing a difference between the assigned non-zero QP value and a predicted QP value for the at least one block,

the method further comprising signaling one or more syntax elements in the bitstream, the one or more syntax elements indicating that the deblocking filtering is enabled for the one or more of the plurality of blocks of video data.

15. The method of claim 14, wherein the coding mode used to code the at least one block comprises the lossless coding mode, and wherein the one or more syntax elements comprise a first one or more syntax elements, the method further comprising signaling a second one or more syntax elements in the bitstream, the second one or more syntax elements indicating that the deblocking filtering is disabled for the at least one block.

16. An apparatus configured to code video data, the apparatus comprising a video coder configured to:

code a plurality of blocks of video data, wherein the video coder is configured to code at least one block of the plurality of blocks of video data using a coding mode that comprises one of an intra pulse code modulation (IPCM) coding mode and a lossless coding mode that uses prediction;

assign a non-zero quantization parameter (QP) value for the at least one block coded using the coding mode; and

perform deblocking filtering on one or more of the plurality of blocks of video data based on the coding mode used to code the at least one block and the assigned non-zero QP value for the at least one block.

17. The apparatus of claim 16, wherein to perform the deblocking filtering on the one or more of the plurality of blocks of video data based on the coding mode used to code the at least one block and the assigned non-zero QP value, the video coder is configured to:

if the coding mode used to code the at least one block comprises the IPCM coding mode, perform the deblocking filtering on the at least one block based on the assigned non-zero QP value; and

if the coding mode used to code the at least one block comprises the lossless coding mode, perform the deblocking filtering on an adjacent block of the plurality of blocks of video data, the adjacent block located adjacent to the at least one block and coded using a lossy coding mode, based on the assigned non-zero QP value.

18. The apparatus of claim 17, wherein to perform the deblocking filtering on each of the at least one block and the adjacent block based on the assigned non-zero QP value, the video coder is configured to perform one or more of:

select a filter for the deblocking filtering based on the assigned non-zero QP value; and

determine a filter strength for the deblocking filtering based on the assigned non-zero QP value.

19. The apparatus of claim 16, wherein the video coder is further configured to, prior to performing the deblocking filtering on the one or more of the plurality of blocks of video data based on the coding mode used to code the at least one block and the assigned non-zero QP value, enable the deblocking filtering for the one or more of the plurality of blocks of video data.

20. The apparatus of claim 16, wherein the coding mode comprises the lossless coding mode, and wherein the video coder is further configured to disable deblocking filtering for the at least one block, including the video coder not performing the deblocking filtering for internal boundary edges of the at least one block.

21. The apparatus of claim 16, wherein to assign the non-zero QP value for the at least one block, the video coder is configured to determine the assigned non-zero QP value based on one or more of the following:

a signaled QP value for the at least one block, wherein the signaled QP value indicates the assigned non-zero QP value;

a predicted QP value for the at least one block; and

a signaled delta QP value for the at least one block, wherein the delta QP value represents a difference between the assigned non-zero QP value and the predicted QP value.

22. The apparatus of claim 16, wherein the coding mode used to code the at least one block comprises the IPCM coding mode, and wherein to assign the non-zero QP value for the at least one block, the video coder is configured to:

when a size of the at least one block is smaller than a minimum coding unit quantization group size, set at least one group QP value for a quantization group that includes the at least one block as the assigned non-zero QP value, wherein the quantization group also includes one or more blocks of video data coded using a lossy coding mode; and

when the size of the at least one block is greater than or equal to the minimum coding unit quantization group size, set a QP value for a neighboring block of the plurality of blocks of video data, the neighboring block comprising one or more of a block located adjacent to the at least one block and a previously coded block, as the assigned non-zero QP value.

23. The apparatus of claim 16, wherein the coding mode used to code the at least one block comprises the IPCM coding mode, and wherein to assign the non-zero QP value for the at least one block, the video coder is configured to:

when a size of the at least one block is smaller than a minimum coding unit quantization group size, setting a QP value for a neighboring block of the plurality of blocks of video data, the neighboring block comprising one or more of a block located adjacent to the at least one block and a previously coded block, as the assigned non-zero QP value.

24. The apparatus of claim 16, wherein the coding mode used to code the at least one block comprises the lossless coding mode, and wherein to assign the non-zero QP value for the at least one block, the video coder is configured to set one of a QP value and a delta QP value for a lossy block of the plurality of blocks of video data as the assigned non-zero QP value, wherein the delta QP value represents a difference between the QP value and a predicted QP value for the lossy block, the lossy block comprising a block coded using a lossy coding mode.

25. The apparatus of claim 16, wherein the coding mode used to code the at least one block comprises the lossless coding mode, and wherein to assign the non-zero QP value for the at least one block, the video coder is configured to set a constant value as the assigned non-zero QP value.

26. The apparatus of claim 16, wherein to code the plurality of blocks of video data including the at least one block, the video coder is configured to decode the plurality of blocks of video including the at least one block, and wherein

to decode the at least one block, the video coder is configured to receive one of residual un-quantized video data and reconstructed video data of the at least one block in a received bitstream, and

to assign the non-zero QP value for the at least one block, the video coder is configured to perform one of receiving the assigned non-zero QP value in the received bitstream, and receiving a delta QP value for the at least one block in the received bitstream, the delta QP value representing a difference between the assigned non-zero QP value and a predicted QP value for the at least one block, and determining the assigned non-zero QP value based on the delta QP value and the predicted QP value,

wherein the video coder is further configured to receive one or more syntax elements in the received bitstream, the one or more syntax elements indicating that the deblocking filtering is enabled for the one or more of the plurality of blocks of video data.

27. The apparatus of claim 26, wherein the coding mode comprises the lossless coding mode, wherein the one or more syntax elements comprise a first one or more syntax elements, and wherein the video coder is further configured to receive a second one or more syntax elements in the received bitstream, the second one or more syntax elements indicating that the deblocking filtering is disabled for the at least one block.

28. The apparatus of claim 16, wherein to code the plurality of blocks of video data including the at least one block, the video coder is configured to encode the plurality of blocks of video including the at least one block, and wherein

to encode the at least one block, the video coder is configured to signal one of residual un-quantized video data and reconstructed video data of the at least one block in a bitstream, and

to assign the non-zero QP value for the at least one block, the video coder is configured to perform one of signaling the assigned non-zero QP value in the bitstream, and signaling a delta QP value for the at least one block in the bitstream, the delta QP value representing a difference between the assigned non-zero QP value and a predicted QP value for the at least one block,

wherein the video coder is further configured to signal one or more syntax elements in the bitstream, the one or more syntax elements indicating that the deblocking filtering is enabled for the one or more of the plurality of blocks of video data.

29. The apparatus of claim 28, wherein the coding mode comprises the lossless coding mode, wherein the one or more syntax elements comprise a first one or more syntax elements, and wherein the video coder is further configured to signal a second one or more syntax elements in the bitstream, the second one or more syntax elements indicating that the deblocking filtering is disabled for the at least one block.

30. The apparatus of claim 16, wherein the apparatus comprises at least one of:

an integrated circuit;

a microprocessor; and

a wireless communication device that includes the video coder.

31. A device configured to code video data, the device comprising:

means for coding a plurality of blocks of video data, including means for coding at least one block of the plurality of blocks of video data using a coding mode that comprises one of an intra pulse code modulation (IPCM) coding mode and a lossless coding mode that uses prediction;

means for assigning a non-zero quantization parameter (QP) value for the at least one block coded using the coding mode; and

means for performing deblocking filtering on one or more of the plurality of blocks of video data based on the coding mode used to code the at least one block and the assigned non-zero QP value for the at least one block.

32. The device of claim 31, wherein the means for performing the deblocking filtering on the one or more of the plurality of blocks of video data based on the coding mode used to code the at least one block and the assigned non-zero QP value comprises:

means for, if the coding mode used to code the at least one block comprises the IPCM coding mode, performing the deblocking filtering on the at least one block based on the assigned non-zero QP value; and

means for, if the coding mode used to code the at least one block comprises the lossless coding mode, performing the deblocking filtering on an adjacent block of the plurality of blocks of video data, the adjacent block located adjacent to the at least one block and coded using a lossy coding mode, based on the assigned non-zero QP value.

33. The device of claim 32, wherein the means for performing the deblocking filtering on each of the at least one block and the adjacent block based on the assigned non-zero QP value comprises one or more of:

means for selecting a filter for the deblocking filtering based on the assigned non-zero QP value; and

means for determining a filter strength for the deblocking filtering based on the assigned non-zero QP value.

34. The device of claim 31, wherein the means for assigning the non-zero QP value for the at least one block comprises means for determining the assigned non-zero QP value based on one or more of the following:

a signaled QP value for the at least one block, wherein the signaled QP value indicates the assigned non-zero QP value;

a predicted QP value for the at least one block; and

a signaled delta QP value for the at least one block, wherein the delta QP value represents a difference between the assigned non-zero QP value and the predicted QP value.

35. The device of claim 31, wherein the coding mode used to code the at least one block comprises the IPCM coding mode, and wherein the means for assigning the non-zero QP value for the at least one block comprises:

means for, when a size of the at least one block is smaller than a minimum coding unit quantization group size, setting at least one group QP value for a quantization group that includes the at least one block as the assigned non-zero QP value, wherein the quantization group also includes one or more blocks of video data coded using a lossy coding mode; and

means for, when the size of the at least one block is greater than or equal to the minimum coding unit quantization group size, setting a QP value for a neighboring block of the plurality of blocks of video data, the neighboring block comprising one or more of a block located adjacent to the at least one block and a previously coded block, as the assigned non-zero QP value.

36. The device of claim 31, wherein the coding mode used to code the at least one block comprises the IPCM coding mode, and wherein the means for assigning the non-zero QP value for the at least one block comprises:

means for, when a size of the at least one block is smaller than a minimum coding unit quantization group size, setting a QP value for a neighboring block of the plurality of blocks of video data, the neighboring block comprising one or more of a block located adjacent to the at least one block and a previously coded block, as the assigned non-zero QP value.

37. The device of claim 31, wherein the coding mode used to code the at least one block comprises the lossless coding mode, and wherein the means for assigning the non-zero QP value for the at least one block comprises means for setting one of a QP value and a delta QP value for a lossy block of the plurality of blocks of video data as the assigned non-zero QP value, wherein the delta QP value represents a difference between the QP value and a predicted QP value for the lossy block, the lossy block comprising a block coded using a lossy coding mode.

38. The device of claim 31, wherein the coding mode used to code the at least one block comprises the lossless coding mode, and wherein the means for assigning the non-zero QP value for the at least one block comprises means for setting a constant value as the assigned non-zero QP value.

39. The device of claim 31, wherein coding comprises decoding, and wherein

the means for decoding the at least one block comprises means for receiving one of residual un-quantized video data and reconstructed video data of the at least one block in a received bitstream, and

the means for assigning the non-zero QP value for the at least one block comprises one of means for receiving the assigned non-zero QP value in the received bitstream, and means for receiving a delta QP value for the at least one block in the received bitstream, the delta QP value representing a difference between the assigned non-zero QP value and a predicted QP value for the at least one block, and determining the assigned non-zero QP value based on the delta QP value and the predicted QP value,

the device further comprising means for receiving one or more syntax elements in the received bitstream, the one or more syntax elements indicating that the deblocking filtering is enabled for the one or more of the plurality of blocks of video data.

40. The device of claim 31, wherein coding comprises encoding, and wherein

the means for encoding the at least one block comprises means for signaling one of residual un-quantized video data and reconstructed video data of the at least one block in a bitstream, and

the means for assigning the non-zero QP value for the at least one block comprises one of means for signaling the assigned non-zero QP value in the bitstream, and means for signaling a delta QP value for the at least one block in the bitstream, the delta QP value representing a difference between the assigned non-zero QP value and a predicted QP value for the at least one block,

the device further comprising means for signaling one or more syntax elements in the bitstream, the one or more syntax elements indicating that the deblocking filtering is enabled for the one or more of the plurality of blocks of video data.

41. A computer-readable storage medium storing instructions that, when executed, cause one or more processors to code video data, wherein the instructions cause the one or more processors to:

code a plurality of blocks of video data, including coding at least one block of the plurality of blocks of video data using a coding mode that comprises one of an intra pulse code modulation (IPCM) coding mode and a lossless coding mode that uses prediction;

assign a non-zero quantization parameter (QP) value for the at least one block coded using the coding mode; and

perform deblocking filtering on one or more of the plurality of blocks of video data based on the coding mode used to code the at least one block and the assigned non-zero QP value for the at least one block.

42. The computer-readable storage medium of claim 41, wherein the instructions that cause the one or more processors to perform the deblocking filtering on the one or more of the plurality of blocks of video data based on the coding mode used to code the at least one block and the assigned non-zero QP value comprise instructions that cause the one or more processors to:

if the coding mode used to code the at least one block comprises the IPCM coding mode, perform the deblocking filtering on the at least one block based on the assigned non-zero QP value; and

if the coding mode used to code the at least one block comprises the lossless coding mode, perform the deblocking filtering on an adjacent block of the plurality of blocks of video data, the adjacent block located adjacent to the at least one block and coded using a lossy coding mode, based on the assigned non-zero QP value.

43. The computer-readable storage medium of claim 42, wherein the instructions that cause the one or more processors to perform the deblocking filtering on each of the at least one block and the adjacent block based on the assigned non-zero QP value comprise instructions that cause the one or more processors to perform one or more of:

select a filter for the deblocking filtering based on the assigned non-zero QP value; and

determine a filter strength for the deblocking filtering based on the assigned non-zero QP value.

44. The computer-readable storage medium of claim 41, wherein the instructions that cause the one or more processors to assign the non-zero QP value for the at least one block comprise instructions that cause the one or more processors to determine the assigned non-zero QP value based on one or more of the following:

a signaled QP value for the at least one block, wherein the signaled QP value indicates the assigned non-zero QP value;

a predicted QP value for the at least one block; and

a signaled delta QP value for the at least one block, wherein the delta QP value represents a difference between the assigned non-zero QP value and the predicted QP value.

45. The computer-readable storage medium of claim 41, wherein the coding mode used to code the at least one block comprises the IPCM coding mode, and wherein the instructions that cause the one or more processors to assign the non-zero QP value for the at least one block comprise instructions that cause the one or more processors to:

when a size of the at least one block is smaller than a minimum coding unit quantization group size, set at least one group QP value for a quantization group that includes the at least one block as the assigned non-zero QP value, wherein the quantization group also includes one or more blocks of video data coded using a lossy coding mode; and

when the size of the at least one block is greater than or equal to the minimum coding unit quantization group size, set a QP value for a neighboring block of the plurality of blocks of video data, the neighboring block comprising one or more of a block located adjacent to the at least one block and a previously coded block, as the assigned non-zero QP value.

46. The computer-readable storage medium of claim 41, wherein the coding mode used to code the at least one block comprises the IPCM coding mode, and wherein the instructions that cause the one or more processors to assign the non-zero QP value for the at least one block comprise instructions that cause the one or more processors to:

when a size of the at least one block is smaller than a minimum coding unit quantization group size, set a QP value for a neighboring block of the plurality of blocks of video data, the neighboring block comprising one or more of a block located adjacent to the at least one block and a previously coded block, as the assigned non-zero QP value.

47. The computer-readable storage medium of claim 41, wherein the coding mode used to code the at least one block comprises the lossless coding mode, and wherein the instructions that cause the one or more processors to assign the non-zero QP value for the at least one block comprise instructions that cause the one or more processors to set one of a QP value and a delta QP value for a lossy block of the plurality of blocks of video data as the assigned non-zero QP value, wherein the delta QP value represents a difference between the QP value and a predicted QP value for the lossy block, the lossy block comprising a block coded using a lossy coding mode.

48. The computer-readable storage medium of claim 41, wherein the coding mode used to code the at least one block comprises the lossless coding mode, and wherein the instructions that cause the one or more processors to assign the non-zero QP value for the at least one block comprise instructions that cause the one or more processors to set a constant value as the assigned non-zero QP value.

49. The computer-readable storage medium of claim 41, wherein coding comprises decoding, and wherein

the instructions that cause the one or more processors to decode the at least one block comprise instructions that cause the one or more processors to receive one of residual un-quantized video data and reconstructed video data of the at least one block in a received bitstream, and

the instructions that cause the one or more processors to assign the non-zero QP value for the at least one block comprise one of instructions that cause the one or more processors to receive the assigned non-zero QP value in the received bitstream, and instructions that cause the one or more processors to receive a delta QP value for the at least one block in the received bitstream, the delta QP value representing a difference between the assigned non-zero QP value and a predicted QP value for the at least one block, and determine the assigned non-zero QP value based on the delta QP value and the predicted QP value,

the computer-readable storage medium further comprising instructions that cause the one or more processors to receive one or more syntax elements in the received bitstream, the one or more syntax elements indicating that the deblocking filtering is enabled for the one or more of the plurality of blocks of video data.

50. The computer-readable storage medium of claim 41, wherein coding comprises encoding, and wherein

the instructions that cause the one or more processors to encode the at least one block comprise instructions that cause the one or more processors to signal one of residual un-quantized video data and reconstructed video data of the at least one block in a bitstream, and

the instructions that cause the one or more processors to assign the non-zero QP value for the at least one block comprise one of instructions that cause the one or more processors to signal the assigned non-zero QP value in the bitstream, and instructions that cause the one or more processors to signal a delta QP value for the at least one block in the bitstream, the delta QP value representing a difference between the assigned non-zero QP value and a predicted QP value for the at least one block,

the computer-readable storage medium further comprising instructions that cause the one or more processors to signal one or more syntax elements in the bitstream, the one or more syntax elements indicating that the deblocking filtering is enabled for the one or more of the plurality of blocks of video data.