US 12,452,433 B2
Entropy coding a secondary transform index based on primary transform type
Madhu Peringassery Krishnan, Mountain View, CA (US); Xin Zhao, San Jose, 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 Jan. 22, 2024, as Appl. No. 18/419,134.
Application 18/419,134 is a continuation of application No. 17/360,431, filed on Jun. 28, 2021, granted, now 11,930,186.
Claims priority of provisional application 63/112,529, filed on Nov. 11, 2020.
Prior Publication US 2024/0163455 A1, May 16, 2024
Int. Cl. H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/593 (2014.01); H04N 19/61 (2014.01); H04N 19/625 (2014.01); H04N 19/80 (2014.01); H04N 19/91 (2014.01)
CPC H04N 19/159 (2014.11) [H04N 19/176 (2014.11); H04N 19/593 (2014.11); H04N 19/61 (2014.11); H04N 19/625 (2014.11); H04N 19/80 (2014.11); H04N 19/91 (2014.11)] 19 Claims
OG exemplary drawing
 
1. A method for video encoding, comprising:
determining a primary transform type indicating a primary transform used for a transform block (TB) to be encoded;
entropy encoding a secondary transform index for the TB based on the primary transform type used for the TB, the secondary transform index indicating a secondary transform in a set of secondary transforms that is to be performed on the TB, the secondary transform being performed after the primary transform on the TB;
generating coded information for the TB indicating the primary transform type; and
generating a coded video bitstream including the coded information and the entropy encoded secondary transform index.