US 12,382,047 B2
Methods and devices for quantization and de-quantization design in video coding
Hong-Jheng Jhu, San Diego, CA (US); Xiaoyu Xiu, San Diego, CA (US); Xianglin Wang, San Diego, CA (US); Yi-Wen Chen, San Diego, CA (US); Tsung-Chuan Ma, San Diego, CA (US); and Bing Yu, Beijing (CN)
Assigned to BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD., Beijing (CN)
Filed by BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD., Beijing (CN)
Filed on Apr. 16, 2024, as Appl. No. 18/636,487.
Application 18/636,487 is a continuation of application No. 17/702,689, filed on Mar. 23, 2022, granted, now 11,997,278.
Application 17/702,689 is a continuation of application No. PCT/US2020/052175, filed on Sep. 23, 2020.
Claims priority of provisional application 62/904,668, filed on Sep. 23, 2019.
Prior Publication US 2024/0283931 A1, Aug. 22, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/126 (2014.01); H04N 19/159 (2014.01); H04N 19/186 (2014.01); H04N 19/196 (2014.01)
CPC H04N 19/126 (2014.11) [H04N 19/159 (2014.11); H04N 19/186 (2014.11); H04N 19/196 (2014.11)] 18 Claims
OG exemplary drawing
 
1. A method for video encoding, comprising:
determining, for a first coding block, a quantization parameter and a quantized level;
deriving a scale value by looking up a scale level table based on the quantization parameter; and
in response to determining that the first coding block is coded in a transform skip mode, obtaining a residual sample for a sample in the first coding block based on the quantized level, the scale value and a plurality of bit-shifts by applying a first de-quantization operation,
wherein the first de-quantization operation is also applied to obtain a reconstructed sample for an escape sample in a second coding block coded in a palette mode; and
wherein parameters of the first de-quantization operation are determined without a block size of the first coding block or the second coding block.