US 11,917,202 B2
Method and apparatus for frequency-dependent joint component secondary transform
Xin Zhao, San Diego, CA (US); Madhu Peringassery Krishnan, Mountain View, CA (US); and Shan Liu, San Jose, CA (US)
Assigned to TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed by TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed on Oct. 6, 2021, as Appl. No. 17/495,202.
Application 17/495,202 is a continuation of application No. 16/928,760, filed on Jul. 14, 2020, granted, now 11,206,428.
Prior Publication US 2022/0030275 A1, Jan. 27, 2022
Int. Cl. H04N 19/61 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/61 (2014.11) [H04N 19/176 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of performing a joint component secondary transform (JCST), the method comprising:
obtaining a plurality of transform coefficients of multiple color components and residual components among the plurality of transform coefficients;
performing a forward transformation on the residual components;
performing the JCST on the forward transformed residual components; and
quantizing and entropy coding the residual components to obtain a bitstream.