US 12,273,523 B2
Systems and methods for joint signaling of transform coefficient signs
Samruddhi Yashwant Kahu, Palo Alto, CA (US); Madhu Peringassery Krishnan, Palo Alto, CA (US); Xin Zhao, Palo Alto, CA (US); and Shan Liu, Palo Alto, CA (US)
Assigned to TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed by Tencent America LLC, Palo Alto, CA (US)
Filed on May 4, 2023, as Appl. No. 18/143,516.
Claims priority of provisional application 63/352,411, filed on Jun. 15, 2022.
Prior Publication US 2023/0412812 A1, Dec. 21, 2023
Int. Cl. H04N 19/00 (2014.01); H04N 19/13 (2014.01); H04N 19/176 (2014.01); H04N 19/18 (2014.01); H04N 19/91 (2014.01)
CPC H04N 19/13 (2014.11) [H04N 19/176 (2014.11); H04N 19/18 (2014.11); H04N 19/91 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of video encoding performed at a computing system having memory and one or more processors, the method comprising:
obtaining video data comprising a plurality of blocks, including a first block;
determining a plurality of transform coefficients associated with the first block, wherein the plurality of transform coefficients are associated with respective prediction accuracies of a plurality of prediction accuracies;
predicting respective coefficient signs for the plurality of transform coefficients;
signaling an index value representing two or more of the predicted coefficient signs; and
entropy coding the first block using the predicted coefficient signs.