US 11,870,994 B2
Method, system, device, and computer-readable storage medium for inverse quantization
Ronggang Wang, Shenzhen (CN); Zhenyu Wang, Shenzhen (CN); and Wen Gao, Shenzhen (CN)
Assigned to PEKING UNIVERSITY SHENZHEN GRADUATE SCHOOL, Shenzhen (CN)
Appl. No. 16/610,467
Filed by PEKING UNIVERSITY SHENZHEN GRADUATE SCHOOL, Shenzhen (CN)
PCT Filed Mar. 6, 2019, PCT No. PCT/CN2019/077153
§ 371(c)(1), (2) Date Nov. 30, 2021,
PCT Pub. No. WO2020/172903, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 201910141289.1 (CN), filed on Feb. 26, 2019.
Prior Publication US 2022/0116607 A1, Apr. 14, 2022
Int. Cl. H04N 19/124 (2014.01); H04N 19/103 (2014.01); H04N 19/136 (2014.01); H04N 19/176 (2014.01); H04N 19/196 (2014.01)
CPC H04N 19/124 (2014.11) [H04N 19/103 (2014.11); H04N 19/136 (2014.11); H04N 19/176 (2014.11); H04N 19/196 (2014.11)] 17 Claims
OG exemplary drawing
 
1. A method for inverse quantization, comprising:
determining an initial weighted inverse quantization matrix, wherein, the initial weighted inverse quantization matrix is the same as the quantized block in size;
setting some matrix elements in the initial weighted inverse quantization matrix to zero to obtain a weighted inverse quantization matrix, wherein, determining the matrix elements that need to be zeroed according to the size of the quantized block;
weighted inverse quantizing the quantized coefficients in the quantized block to generate corresponding inverse transform coefficients, wherein, the value of the matrix element corresponding to the position of the quantized coefficient in the weighted inverse quantization matrix is used as a weight coefficient of the weighted inverse quantization.