US 11,991,393 B2
Methods and apparatuses for coding video data with secondary transform
Man-Shu Chiang, Hsinchu (TW); Chih-Wei Hsu, Hsinchu (TW); Tzu-Der Chuang, Hsinchu (TW); and Ching-Yeh Chen, Hsinchu (TW)
Assigned to HFI INNOVATION INC., Zhubei (TW)
Appl. No. 17/604,149
Filed by MEDIATEK INC., Hsinchu (TW)
PCT Filed Apr. 15, 2020, PCT No. PCT/CN2020/084898
§ 371(c)(1), (2) Date Oct. 15, 2021,
PCT Pub. No. WO2020/211777, PCT Pub. Date Oct. 22, 2020.
Claims priority of provisional application 62/868,023, filed on Jun. 28, 2019.
Claims priority of provisional application 62/834,487, filed on Apr. 16, 2019.
Prior Publication US 2022/0201335 A1, Jun. 23, 2022
Int. Cl. H04N 19/61 (2014.01); H04N 19/11 (2014.01); H04N 19/122 (2014.01); H04N 19/132 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/18 (2014.01); H04N 19/186 (2014.01)
CPC H04N 19/61 (2014.11) [H04N 19/11 (2014.11); H04N 19/122 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/18 (2014.11); H04N 19/132 (2014.11); H04N 19/186 (2014.11)] 13 Claims
OG exemplary drawing
 
1. A method of decoding video data in a video coding system, comprising:
receiving a video bitstream carrying input data associated with a current block in a current video picture;
decoding the input data associated with the current block to determine final transform coefficients of the current block;
determining that a width or height of the current block is larger than a predefined threshold;
determining an inverse transform operation for the current block, wherein the inverse transform operation excludes inverse secondary transform;
applying the inverse transform operation to the final transform coefficients to recover residuals of the current block; and
decoding the current block in the video picture based on the residuals of the current block,
wherein the current block is a Coding Unit (CU), and the step of determining an inverse transform operation further comprises determining the inverse transform operation excludes inverse secondary transform based on a number of TU(s) in the current block.