Block-based quantized residual domain pulse code modulation assignment for intra prediction mode derivation

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

obtaining a first block of a picture included in an encoded video bitstream;

determining that a second block of the picture is coded using a vertical block-based quantized residual domain pulse code modulation (BDPCM) mode;

determining a vertical intra-prediction mode for adding to an intra-prediction mode list for the first block based on a mapping between the vertical BDPCM mode and the vertical intra-prediction mode; and

adding the vertical intra-prediction mode to the intra-prediction mode list for the first block.

2. The method of claim 1 , wherein the intra-prediction mode list includes a most probable modes (MPM) list.

3. The method of claim 1 , wherein the second block is a neighboring block of the first block in the picture.

4. The method of claim 1 , further comprising:

determining, based on information from the encoded video bitstream and based on the intra-prediction mode list, a prediction mode to use for decoding the first block; and

decoding the first block using the determined prediction mode.

5. The method of claim 4 , wherein the information from the encoded video bitstream includes an intra-prediction mode list flag indicating whether the prediction mode to use for decoding the first block is among a number of prediction modes included in the intra-prediction mode list.

6. The method of claim 5 , further comprising:

determining, based on a value of the intra-prediction mode list flag, that the prediction mode to use for decoding the first block is among the number of prediction modes included in the intra-prediction mode list; and

determining the prediction mode to use for decoding the first block from the intra-prediction mode list.

7. The method of claim 6 , wherein the information in the encoded video bitstream includes an index value associated with the intra-prediction mode list, the method further comprising:

determining the prediction mode to use for decoding the first block from the intra-prediction mode list using the index value.

8. The method of claim 1 , wherein the first block is a luma coding block.

9. The method of claim 1 , further comprising:

obtaining a third block of the picture included in the encoded video bitstream;

determining a fourth block of the picture is coded using a horizontal BDPCM mode;

determining, based on the fourth block being coded using the horizontal BDPCM mode, a horizontal intra-prediction mode for an intra-prediction mode list for the third block; and

adding the horizontal intra-prediction mode to the intra-prediction mode list for the third block.

10. The method of claim 9 , wherein the vertical horizontal intra-prediction mode is determined for the intra-prediction mode list for the third block based on a mapping between the horizontal BDPCM mode and the horizontal intra-prediction mode.

11. An apparatus for decoding video data, comprising:

a memory configured to store at least one block of the video data; and

a video decoder comprising at least one of fixed-function and programmable circuitry, the video decoder being configured to:

obtain a first block of a picture included in an encoded video bitstream;

determine that a second block of the picture is coded using a vertical block-based quantized residual domain pulse code modulation (BDPCM) mode;

determine a vertical intra-prediction mode for adding to an intra-prediction mode list for the first block based on a mapping between the vertical BDPCM mode and the vertical intra-prediction mode; and

add the vertical intra-prediction mode to the intra-prediction mode list for the first block.

12. The apparatus of claim 11 , wherein the intra-prediction mode list includes a most probable modes (MPM) list.

13. The apparatus of claim 11 , wherein the second block is a neighboring block of the first block in the picture.

14. The apparatus of claim 11 , wherein the video decoder is configured to:

determine, based on information from the encoded video bitstream and based on the intra-prediction mode list, a prediction mode to use for decoding the first block; and

decode the first block using the determined prediction mode.

15. The apparatus of claim 14 , wherein the information from the encoded video bitstream includes an intra-prediction mode list flag indicating whether the prediction mode to use for decoding the first block is among a number of prediction modes included in the intra-prediction mode list.

16. The apparatus of claim 15 , wherein the video decoder is configured to:

determine, based on a value of the intra-prediction mode list flag, that the prediction mode to use for decoding the first block is among the number of prediction modes included in the intra-prediction mode list; and

determine the prediction mode to use for decoding the first block from the intra-prediction mode list.

17. The apparatus of claim 16 , wherein the information in the encoded video bitstream includes an index value associated with the intra-prediction mode list, the video decoder being configured to:

determine the prediction mode to use for decoding the first block from the intra-prediction mode list using the index value.

18. The apparatus of claim 11 , wherein the first block is a luma coding block.

19. The apparatus of claim 11 , wherein the video decoder is configured to:

obtain a third block of the picture included in the encoded video bitstream;

determining a fourth block of the picture is coded using a horizontal BDPCM mode;

determine, based on the fourth block being coded using the horizontal BDPCM mode, a horizontal intra-prediction mode for an intra-prediction mode list for the third block; and

add the horizontal intra-prediction mode to the intra-prediction mode list for the third block.

20. The apparatus of claim 19 , wherein the horizontal intra-prediction mode is determined for the intra-prediction mode list for the third block based on a mapping between the horizontal BDPCM mode and the horizontal intra-prediction mode.

21. The apparatus of claim 11 , further comprising a display configured to display the video data.

22. The apparatus of claim 11 , wherein the apparatus comprises at least one of a camera, a computer, a mobile device, a broadcast receiver device, and a set-top box.

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

encoding a first block of a picture using a vertical block-based quantized residual domain pulse code modulation (BDPCM) mode;

obtaining a second block of the picture;

determining a vertical intra-prediction mode for adding to an intra-prediction mode list for the second block based on a mapping between the vertical BDPCM mode and the vertical intra-prediction mode;

adding the vertical intra-prediction mode to the intra-prediction mode list for the second block; and

generating an encoded video bitstream including information associated with the intra-prediction mode list.

24. The method of claim 23 , wherein the intra-prediction mode list includes a most probable modes (MPM) list.

25. The method of claim 23 , wherein the second block is a neighboring block of the first block in the picture.

26. The method of claim 23 , wherein the information associated with the intra-prediction mode list is indicative of a prediction mode to use for decoding the first block.

27. The method of claim 26 , wherein the information includes an intra-prediction mode list flag indicating whether the prediction mode to use for decoding the first block is among a number of prediction modes included in the intra-prediction mode list.

28. The method of claim 27 , wherein the information includes an index value indicating the prediction mode from the intra-prediction mode list to use for decoding the first block.

29. The method of claim 23 , wherein the second block is a luma coding block.

30. The method of claim 23 , further comprising:

encoding a third block of the picture using a horizontal BDPCM mode;

obtaining a fourth block of the picture;

determining, based on the third block being coded using the horizontal BDPCM mode, a horizontal intra-prediction mode for an intra-prediction mode list for the fourth block; and

adding the horizontal intra-prediction mode to the intra-prediction mode list for the fourth block.

31. The method of claim 30 , wherein the horizontal intra-prediction mode is determined for the intra-prediction mode list for the fourth block based on a mapping between the horizontal BDPCM mode and the horizontal intra-prediction mode.

32. An apparatus for encoding video data, comprising:

a memory configured to store at least one block of the video data; and

a video encoder comprising at least one of fixed-function and programmable circuitry, the video encoder being configured to:

encode a first block of a picture using a vertical block-based quantized residual domain pulse code modulation (BDPCM) mode;

obtain a second block of the picture;

determine a vertical intra-prediction mode for adding to an intra-prediction mode list for the second block based on a mapping between the vertical BDPCM mode and the vertical intra-prediction mode;

add the vertical intra-prediction mode to the intra-prediction mode list for the second block; and

generate an encoded video bitstream including information associated with the intra-prediction mode list.

33. The apparatus of claim 32 , wherein the intra-prediction mode list includes a most probable modes (MPM) list.

34. The apparatus of claim 32 , wherein the second block is a neighboring block of the first block in the picture.

35. The apparatus of claim 32 , wherein the video encoder is configured to:

wherein the information associated with the intra-prediction mode list is information indicative of a prediction mode to use for decoding the first block.

36. The apparatus of claim 35 , wherein the information includes an intra-prediction mode list flag indicating whether the prediction mode to use for decoding the first block is among a number of prediction modes included in the intra-prediction mode list.

37. The apparatus of claim 36 , wherein the information includes an index value indicating the prediction mode from the intra-prediction mode list to use for decoding the first block.

38. The apparatus of claim 32 , wherein the second block is a luma coding block.

39. The apparatus of claim 32 , wherein the video encoder is configured to:

encode a third block of the picture using a horizontal BDPCM mode;

obtain a fourth block of the picture;

determine, based on the third block being coded using the horizontal BDPCM mode, a horizontal intra-prediction mode for an intra-prediction mode list for the fourth block; and

add the horizontal intra-prediction mode to the intra-prediction mode list for the fourth block.

40. The apparatus of claim 39 , wherein the horizontal intra-prediction mode is determined for the intra-prediction mode list for the fourth block based on a mapping between the horizontal BDPCM mode and the horizontal intra-prediction mode.

41. The apparatus of claim 32 , wherein the apparatus comprises one or more of a camera, a computer, a mobile device, a broadcast receiver device, or a set-top box.