US 11,758,137 B2
Encoder, decoder and corresponding methods using DCT2 enabled high level flag
Han Gao, Munich (DE); Jianle Chen, San Diego, CA (US); Semih Esenlik, Munich (DE); Anand Meher Kotra, Munich (DE); and Biao Wang, Munich (DE)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Jul. 8, 2021, as Appl. No. 17/370,805.
Application 17/370,805 is a continuation of application No. PCT/CN2020/071591, filed on Jan. 11, 2020.
Claims priority of provisional application 62/791,674, filed on Jan. 11, 2019.
Prior Publication US 2021/0344920 A1, Nov. 4, 2021
Int. Cl. H04N 19/122 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/196 (2014.01); H04N 19/61 (2014.01); H04N 19/625 (2014.01); G06T 9/00 (2006.01); G06T 9/40 (2006.01)
CPC H04N 19/122 (2014.11) [G06T 9/007 (2013.01); G06T 9/40 (2013.01); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/196 (2014.11); H04N 19/61 (2014.11); H04N 19/625 (2014.11)] 21 Claims
OG exemplary drawing
 
1. A method of coding video picture blocks of a picture by a coding device, comprising:
obtaining a residual signal resulting from inter-picture prediction or intra-picture prediction;
inferring, from a sequence level DCT2 enabled flag in a Sequence Parameter Set (SPS), use of a Discrete Cosine Transform type 2 (DCT2) transform core for a block of a sequence of the residual signal, wherein the sequence level DCT2 enabled flag is denoted as sps_dct2_enabled_flag; and
transforming the block using the DCT2 transform core.