US 12,294,709 B2
Minimum allowed quantization for transform skip blocks in video coding
Jizheng Xu, San Diego, CA (US); Zhipin Deng, Beijing (CN); Li Zhang, San Diego, CA (US); Hongbin Liu, Beijing (CN); and Kai Zhang, San Diego, CA (US)
Assigned to BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., Beijing (CN); and BYTEDANCE INC., Los Angeles, CA (US)
Filed by Beijing Bytedance Network Technology Co., Ltd., Beijing (CN); and Bytedance Inc., Los Angeles, CA (US)
Filed on Oct. 10, 2022, as Appl. No. 17/962,861.
Application 17/962,861 is a continuation of application No. PCT/CN2021/086522, filed on Apr. 12, 2021.
Claims priority of application No. PCT/CN2020/084291 (WO), filed on Apr. 10, 2020.
Prior Publication US 2023/0099893 A1, Mar. 30, 2023
Int. Cl. H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/132 (2014.11) [H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/70 (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 picture of a video and a bitstream of the video, whether a first coding mode is applied to the current video block according to a first rule, wherein in the first coding 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 determining,
wherein the first rule specifies that the first coding mode is conditionally allowed to the current video block when the current video block has a mode type of MODE_TYPE_ALL or a mode type of MODE_TYPE_INTRA, and that the first coding mode is disallowed to the current video block when the current video block has a mode type of MODE_TYPE_INTER,
wherein a reconstructed picture sample array of the video picture is further obtained and a deblocking filter process is applied to at least one edge in the reconstructed picture sample array, wherein an array of boundary filtering strengths is derived for the deblocking filter process according to a second rule specifying that bS[xDi][yDj] is equal to 0 when a set of conditions are not satisfied, the reconstructed picture sample array is a reconstructed luma picture sample array, a variable related to an edge flag is not equal to 2, and two variables mapping to two samples have different values,
wherein bS[xDi][yDj] denotes an element in the array of boundary filtering strengths for xDi with i=0 . . . xN and yDj with j=0 . . . yN,
wherein the two samples are samples of the reconstructed picture sample array corresponding to bS[xDi][yDj], and
wherein the two variables indicate prediction modes of two video blocks in the reconstructed picture sample array and containing the two samples, respectively, or the two variables indicate prediction modes of two video subblocks divided from one or more video blocks in the reconstructed picture sample array and containing the two samples, respectively.