US 11,722,675 B2
Sign prediction for multiple color components in video coding
Hongtao Wang, San Diego, CA (US); Jianle Chen, 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 Dec. 21, 2021, as Appl. No. 17/645,439.
Claims priority of provisional application 63/131,615, filed on Dec. 29, 2020.
Prior Publication US 2022/0210434 A1, Jun. 30, 2022
Int. Cl. H04N 19/186 (2014.01); H04N 19/46 (2014.01); H04N 19/146 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/146 (2014.11) [H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/46 (2014.11)] 28 Claims
OG exemplary drawing
 
1. A method of decoding video data, the method comprising:
predicting, based on a plurality of color components of a block of video data coded using joint coding of chroma residuals (JCCR), a sign of a coefficient of a plurality of coefficients of a joint residual block of the block of video data, wherein predicting the sign comprises:
determining, as a weighted sum of cost values of the plurality of color components, a joint cost value of the plurality of color components, wherein determining the weighted sum of the cost values comprises:
determining a first weight for a first color component of the plurality of color components and a second weight for a second color component of the plurality of color components; and
determining the weighted sum of the cost values of the plurality of color components based on first weight and the second weight; and
predicting the sign based on the joint cost value;
generating, for each respective color component of the plurality of color components and based on the plurality of coefficients of the joint residual block, coefficients of a respective residual block of a plurality of residual blocks; and
reconstructing, based on the plurality of residual blocks, the block of video data.