US 12,267,496 B2
Incremental transform set construction and transform signaling for video coding
Hilmi Enes Egilmez, Santa Clara, CA (US); Yunfei Zheng, Santa Clara, CA (US); Alican Nalci, Cupertino, CA (US); Yeqing Wu, Cupertino, CA (US); Yixin Du, Cupertino, CA (US); Guoxin Jin, San Diego, CA (US); Alexandros Tourapis, Los Gatos, CA (US); Jun Xin, San Jose, CA (US); and Hsi-Jung Wu, San Jose, CA (US)
Assigned to APPLE INC., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jul. 25, 2023, as Appl. No. 18/358,111.
Claims priority of provisional application 63/392,944, filed on Jul. 28, 2022.
Prior Publication US 2024/0040120 A1, Feb. 1, 2024
Int. Cl. H04N 7/12 (2006.01); H04N 19/12 (2014.01); H04N 19/122 (2014.01); H04N 19/136 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/18 (2014.01); H04N 19/186 (2014.01); H04N 19/61 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/122 (2014.11) [H04N 19/12 (2014.11); H04N 19/136 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/18 (2014.11); H04N 19/186 (2014.11); H04N 19/61 (2014.11); H04N 19/70 (2014.11)] 37 Claims
OG exemplary drawing
 
1. A video decoding method, comprising:
identifying, from a transform set processing context, a transform set to be used for decoding a transform unit, the transform set selected from a hierarchy of transform sets, wherein each transform set includes a respective number of transforms and each higher-level transform set of the hierarchy includes the transforms of each lower-level transform set of the hierarchy;
identifying, from a candidate transform processing context, a transform from the identified transform set to be used for decoding a coded block, and
decoding the coded block according to the identified transform.