US 11,943,481 B2
Entropy coding for palette escape symbol
Weijia Zhu, San Diego, CA (US); Jizheng Xu, San Diego, CA (US); Li Zhang, San Diego, CA (US); and Hsiao Chiang Chuang, San Diego, CA (US)
Assigned to BYTEDANCE INC., Los Angeles, CA (US)
Filed by Bytedance Inc., Los Angeles, CA (US)
Filed on Oct. 13, 2022, as Appl. No. 17/965,325.
Application 17/965,325 is a continuation of application No. 17/671,422, filed on Feb. 14, 2022, granted, now 11,503,344.
Application 17/671,422 is a continuation of application No. PCT/US2020/046581, filed on Aug. 15, 2020.
Claims priority of application No. PCT/CN2019/100850 (WO), filed on Aug. 15, 2019; application No. PCT/CN2019/106700 (WO), filed on Sep. 19, 2019; application No. PCT/CN2019/107494 (WO), filed on Sep. 24, 2019; application No. PCT/CN2019/108736 (WO), filed on Sep. 27, 2019; application No. PCT/CN2019/109793 (WO), filed on Oct. 1, 2019; application No. PCT/CN2019/113931 (WO), filed on Oct. 29, 2019; and application No. PCT/CN2020/071221 (WO), filed on Jan. 9, 2020.
Prior Publication US 2023/0051883 A1, Feb. 16, 2023
Int. Cl. H04N 19/70 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01)
CPC H04N 19/70 (2014.11) [H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method for processing video data, comprising:
determining, for a conversion between a current video block of a video and a bitstream of the video, that a prediction mode is applied to the current video block, wherein in the prediction mode, reconstructed samples are represented by a set of representative color values, and the set of representative color values comprises at least one of 1) palette predictors, 2) escaped samples, or 3) palette information included in the bitstream; and
performing the conversion at least based on the prediction mode,
wherein a first syntax element specifying a quantized value of the escaped sample is included in the bitstream, and wherein a binarization of the first syntax element uses an exponential-Golomb (EG) code of order K, K a non-negative integer that is unequal to three, and
wherein the escaped sample is reconstructed based on a level scale chosen from a list of level scales using an index, wherein the list of level scales is {40, 45, 51, 57, 64, 72}, and the index is determined based on qP % 6, wherein % is a mod sign and qP specifies a quantization parameter.