Increasing decoding throughput of intra-coded blocks

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

determining, by one or more processors implemented in circuitry, a picture size of a picture according to a picture size restriction, wherein the picture size restriction comprises determining a maximum between a minimum coding unit size for the picture and 8 and determining a width of the picture and a height of the picture to each be a respective multiple of the determined maximum;

determining, by the one or more processors, a partition of the picture into a plurality of blocks;

generating, by the one or more processors, a prediction block for a block of the plurality of blocks;

decoding, by the one or more processors, a residual block for the block; and

combining, by the one or more processors, the prediction block and the residual block to decode the block.

2. The method of claim 1 , wherein the minimum coding unit size comprises a minimum width of a coding unit for the picture or a minimum height of the coding unit for the picture.

3. The method of claim 1 , wherein determining the partition comprises determining that a chroma block at a bottom-right corner of the picture comprises a size of at least 4×4.

4. The method of claim 1 , wherein determining the partition comprises determining that a luma block at a bottom-right corner of the picture comprises a size of at least 8×8.

5. The method of claim 1 ,

wherein the picture size applies the picture size restriction to set the width of the picture to comprise a first number of luma samples that is a first multiple of the maximum of 8 and the minimum coding unit size for the picture; and

wherein the picture size applies the picture size restriction to set the height of the picture to comprise a second number of luma samples that is a second multiple of the maximum of 8 and the minimum coding unit size for the picture.

6. The method of claim 1 , wherein the block is included in a slice of the picture.

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

setting, by one or more processors implemented in circuitry, a picture size of a picture, wherein setting the picture size comprises determining a maximum between a minimum coding unit size for the picture and 8 and applying a picture size restriction to set a width of the picture and a height of the picture to each be a respective multiple of the determined maximum;

partitioning, by one or more processors implemented in circuitry, the picture into a plurality of blocks;

generating, by the one or more processors, a prediction block for a block of the plurality of blocks;

generating, by the one or more processors, a residual block for the block based on differences between the block and the prediction block; and

encoding, by the one or more processors, the residual block.

8. The method of claim 7 , wherein the minimum coding unit size comprises a minimum width of a coding unit for the picture or a minimum height of the coding unit for the picture.

9. The method of claim 7 , wherein partitioning comprises determining that a chroma block at a bottom-right corner of the picture comprises a size of at least 4×4.

10. The method of claim 7 , wherein partitioning comprises determining that a luma block at a bottom-right corner of the picture comprises a size of at least 8×8.

11. The method of claim 7 , wherein setting the picture size comprises:

setting the width of the picture to comprise a first number of luma samples that is a first multiple of the maximum of 8 and the minimum coding unit size for the picture; and

setting the height of the picture to comprise a second number of luma samples that is a second multiple of the maximum of 8 and the minimum coding unit size for the picture.

12. The method of claim 7 , wherein the block is included in a slice of the picture.

13. A device for decoding video data, the device comprising one or more processors implemented in circuitry and configured to:

determine a picture size of a picture according to a picture size restriction so as to determine a maximum between a minimum coding unit size for the picture and 8 and determine a width of the picture and a height of the picture to each be a respective multiple of the determined maximum;

determine a partition of the picture into a plurality of blocks;

generate a prediction block for a block of the plurality of blocks;

decode a residual block for the block; and

combine the prediction block and the residual block to decode the block.

14. The device of claim 13 , wherein the minimum coding unit size comprises a minimum width of a coding unit for the picture or a minimum height of the coding unit for the picture.

15. The device of claim 13 , wherein, to determine the partition, the one or more processors are configured to determine that a chroma block at a bottom-right corner of the picture comprises a size of at least 4×4.

16. The device of claim 13 , wherein, to determine the partition, the one or more processors are configured to determine that a luma block at a bottom-right corner of the picture comprises a size of at least 8×8.

17. The device of claim 13 ,

wherein the picture size applies the picture size restriction to set the width of the picture to comprise a first number of luma samples that is a first multiple of the maximum of 8 and the minimum coding unit size for the picture; and

wherein the picture size applies the picture size restriction to set the height of the picture to comprise a second number of luma samples that is a second multiple of the maximum of 8 and the minimum coding unit size for the picture.

18. The device of claim 13 , wherein the block is included in a slice of the picture.

19. The device of claim 13 , further comprising a display configured to display the picture.

20. The device of claim 13 , wherein the device comprises one or more of a camera, a computer, a mobile device, a broadcast receiver device, or a set-top box.

21. A device for encoding video data, the device comprising one or more processors implemented in circuitry and configured to:

set a picture size of a picture, wherein, to set the picture size, the one or more processors are configured to determine a maximum between a minimum coding unit size for the picture and 8 and apply a picture size restriction to set a width of the picture and a height of the picture to each be a respective multiple of the determined maximum;

partition the picture into a plurality of blocks;

generate a prediction block for a block of the plurality of blocks;

generate a residual block for the block based on differences between the block and the prediction block; and

encode the residual block.

22. The device of claim 21 , wherein the minimum coding unit size comprises a minimum width of a coding unit for the picture or a minimum height of the coding unit for the picture.

23. The device of claim 21 , wherein, to partition, the one or more processors are configured to determine that a chroma block at a bottom-right corner of the picture comprises a size of at least 4×4.

24. The device of claim 21 , wherein, to partition, the one or more processors are configured to determine that a luma block at a bottom-right corner of the picture comprises a size of at least 8×8.

25. The device of claim 21 , wherein, to set the picture size, the one or more processors are configured to:

set the width of the picture to comprise a first number of luma samples that is a first multiple of the maximum of 8 and the minimum coding unit size for the picture; and

set the height of the picture to comprise a second number of luma samples that is a second multiple of the maximum of 8 and the minimum coding unit size for the picture.

26. The device of claim 21 , wherein the block is included in a slice of the picture.

27. An apparatus for decoding video data, the apparatus comprising:

means for determining a picture size of a picture, wherein the picture size applies a picture size restriction, wherein the picture size restriction comprises determining a maximum between a minimum coding unit size for the picture and 8 and determining a width of the picture and a height of the picture to each be a respective multiple of the determined maximum;

means for determining a partition of the picture into a plurality of blocks;

means for generating a prediction block for a block of the plurality of blocks;

means for decoding a residual block for the block; and

means for combining the prediction block and the residual block to decode the block.

28. An apparatus for encoding video data, the apparatus comprising:

means for setting a picture size of a picture, wherein the means for setting the picture size comprises means for determining a maximum between a minimum coding unit size for the picture and 8 and means for applying a picture size restriction to set a width of the picture and a height of the picture to each be a respective multiple of the determined maximum;

means for partitioning the picture into a plurality of blocks;

means for generating a prediction block for a block of the plurality of blocks;

means for generating a residual block for the block based on differences between the block and the prediction block; and

means for encoding the residual block.

29. A non-transitory computer-readable storage medium having stored thereon instructions that, when executed, cause one or more processors to:

determine a picture size of a picture, wherein the picture size applies a picture size restriction so as to determine a maximum between a minimum coding unit size for the picture and 8 and determine a width of the picture and a height of the picture to each be a respective multiple of the determined maximum;

determine a partition of the picture into a plurality of blocks;

generate a prediction block for a block of the plurality of blocks;

decode a residual block for the block; and

combine the prediction block and the residual block to decode the block.

30. A non-transitory computer-readable storage medium having stored thereon instructions that, when executed, cause one or more processors to:

set a picture size of a picture, wherein, to set the picture size, the instructions cause the one or more processors to determine a maximum between a minimum coding unit size for the picture and 8 and apply a picture size restriction to set a width of the picture and a height of the picture to each be a respective multiple of the maximum;

partition the picture into a plurality of blocks;

generate a prediction block for a block of the plurality of blocks;

generate a residual block for the block based on differences between the block and the prediction block; and

encode the residual block.