US 12,244,839 B2
Constraint of minimum quaternary tree size
Guichun Li, San Jose, CA (US); Xiang Li, Saratoga, 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 Apr. 13, 2023, as Appl. No. 18/300,223.
Application 18/300,223 is a continuation of application No. 17/494,539, filed on Oct. 5, 2021, granted, now 11,711,531.
Application 17/494,539 is a continuation of application No. 17/077,748, filed on Oct. 22, 2020, granted, now 11,206,416, issued on Dec. 21, 2021.
Claims priority of provisional application 62/979,911, filed on Feb. 21, 2020.
Prior Publication US 2023/0283794 A1, Sep. 7, 2023
Int. Cl. H04N 19/44 (2014.01); H04N 19/119 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/96 (2014.01)
CPC H04N 19/44 (2014.11) [H04N 19/119 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/96 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method for video decoding in a decoder, comprising:
decoding, by processing circuitry, partition information from a coded video bitstream, the partition information being indicative of a minimum allowed quaternary tree (QT) leaf node size for an intra coded (I) slice, the minimum allowed QT leaf node size for the I slice being constrained by a threshold that is lower than a coding tree unit (CTU) size;
determining, by the processing circuitry based on an override enabling flag, the minimum allowed QT leaf node size according to one of a first syntax element in a sequence parameter set (SPS) or a second syntax element in a picture head (PH) included in the partition information;
partitioning, by the processing circuitry, a coding tree block in the I slice into coding blocks based on the determined minimum allowed QT leaf node size, wherein a base 2 logarithm of the minimum allowed QT leaf node size is less than a base 2 logarithm of the CTU size; and
reconstructing, by the processing circuitry, the coding blocks respectively from the coded video bitstream.