US 11,863,787 B2
Maximum allowed block size for BDPCM mode
Yu Han, San Diego, CA (US); Muhammed Zeyd Coban, Carlsbad, CA (US); Hongtao Wang, San Diego, CA (US); Wei-Jung Chien, San Diego, CA (US); and Marta Karczewicz, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jun. 18, 2020, as Appl. No. 16/905,100.
Claims priority of provisional application 62/863,734, filed on Jun. 19, 2019.
Prior Publication US 2020/0404329 A1, Dec. 24, 2020
Int. Cl. H04N 19/60 (2014.01); H04N 19/176 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/60 (2014.11) [H04N 19/176 (2014.11); H04N 19/70 (2014.11)] 29 Claims
OG exemplary drawing
 
1. A method of decoding video data, the method comprising:
receiving, in a bitstream, a syntax element as part of a sequence parameter set syntax structure for a picture, wherein the syntax element indicates a maximum block size for both a transform skip mode and a block-based delta pulse code modulation (BDPCM) mode;
determining a maximum block size for the BDPCM mode based on the syntax element, wherein the maximum block size is limited to a range of sizes from 4 to 32;
determining the maximum block size for the transform skip mode based on the syntax element; and
based on the determined maximum block size for the transform skip mode, determining that a BDPCM mode flag is present in the bitstream for the first block in response to a size for the first block being less than or equal to the maximum block size for the BDPCM mode and decoding the BDPCM mode flag from the bitstream;
determining that a first block of the picture is coded using the BDPCM mode based on the BDPCM mode flag;
decoding the first block based on the determined maximum block size;
determining that a second block of the picture is coded using the transform skip mode;
decoding the second block based on the determined maximum block size; and
outputting a decoded version of the picture.