# US 12,764,335 B2 · Residual and coefficients coding for video coding > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,764,335 B2 - Document ID: US12764335B2 - Status: Granted - Kind: B2 - Application number: 18/390,465 - Filed: 2023-12-20 - Published: 2024-06-13 - Granted: 2026-10-13 - Earliest claimed: 2021-06-28 - Assignees: Beijing Dajia Internet Information Technology Co., Ltd. - Applicants: Beijing Dajia Internet Information Technology Co., Ltd. - Inventors: Hong-Jheng Jhu; Xiaoyu Xiu; Yi-Wen Chen; Wei Chen; Che-Wei Kuo; Ning Yan; Xianglin Wang; Bing Yu - Web page: https://patentgrep.com/patent/US12764335B2 ## CPC - H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video decoding. In one method, a decoder receives a Sequence Parameter Set (SPS) coefficient enabled flag that indicates whether a slice header (SH) coefficient enabled flag is present in slice header syntax structure referring to the SPS. In a second method, the decoder may receive a Sequence Parameter Set (SPS) transform precision adaption enabled flag that indicates whether downshifts in a scaling process for transform coefficients and in a transformation process for scaled transform coefficients are adaptively assigned by examining coefficients values of dequantization and inverse transform. ## Claims ### Claim 1 A method for video decoding, comprising: receiving, by a decoder, a Sequence Parameter Set (SPS) reversed coordinates of last significant coefficient enabled flag, that indicates whether a slice header (SH) reversed coordinates of last significant coefficient flag is present in slice header syntax structure referring to the SPS; and receiving, by the decoder, a general constraint information (GCI) reversed coordinates of last significant coefficient enabled flag in GCI syntax, wherein the GCI reversed coordinates of last significant coefficient enabled flag is used to provide general control of the SPS reversed coordinates of last significant coefficient enabled flag. ### Claim 2 (depends on 1) The method for video decoding of claim 1, further comprising: in response to determining that a value of the SPS reversed coordinates of the last significant coefficient enabled flag equals to 1, determining, by the decoder, that the SH reversed coordinates of the last significant coefficient flag is present in the slice header syntax structure referring to the SPS; and in response to determining that the value of the SPS reversed coordinates of the last significant coefficient enabled flag equals to 0, determining, by the decoder, that the SH reversed coordinates of the last significant coefficient flag is not present in the slice header syntax structure referring to the SPS. ### Claim 3 (depends on 1) The method for video decoding of claim 1, further comprising: in response to determining that a value of the GCI reversed coordinates of the last significant coefficient enabled flag equals to 1, determining that a value of the SPS reversed coordinates of the last significant coefficient enabled flag equals to 0. ### Claim 4 (depends on 1) The method for video decoding of claim 1, wherein a bit depth of video data is 11. ### Claim 5 (depends on 1) The method for video decoding of claim 1, wherein a bit depth of video data is 9. ### Claim 6 (depends on 1) An apparatus for video decoding, comprising: one or more processors; and a memory configured to store instructions executable by the one or more processors; wherein the one or more processors, upon execution of the instructions, are configured to perform the method for video decoding of claim 1. ### Claim 7 (depends on 1) A non-transitory computer-readable storage medium for video decoding storing computer-executable instructions that, when executed by one or more computer processors, cause the one or more computer processors to store a bitstream and to perform the method for video decoding of claim 1 with the bitstream. ### Claim 8 (depends on 7) The non-transitory computer-readable storage medium of claim 7, wherein the operations further comprise: in response to determining that a value of the SPS reversed coordinates of the last significant coefficient enabled flag equals to 1, determining, by the decoder, that the SH reversed coordinates of the last significant coefficient flag is present in the slice header syntax structure referring to the SPS; and in response to determining that the value of the SPS reversed coordinates of the last significant coefficient enabled flag equals to 0, determining, by the decoder, that the SH reversed coordinates of the last significant coefficient flag is not present in the slice header syntax structure referring to the SPS. ### Claim 9 (depends on 7) The non-transitory computer-readable storage medium of claim 7, wherein the operations further comprise: in response to determining that a value of the GCI reversed coordinates of the last significant coefficient enabled flag equals to 1, determining that a value of the SPS reversed coordinates of the last significant coefficient enabled flag equals to 0. ### Claim 10 (depends on 7) The non-transitory computer-readable storage medium of claim 7, wherein a bit depth of video data is 11. ### Claim 11 (depends on 7) The non-transitory computer-readable storage medium of claim 7, wherein a bit depth of video data is 12. ### Claim 12 A method of storing a bitstream, comprising: performing an encoding method to generate a bitstream; and storing the bitstream on a non-transitory computer-readable storage medium, wherein the encoding method comprises: signaling a Sequence Parameter Set (SPS) reversed coordinates of last significant coefficient enabled flag, that indicates whether a slice header (SH) reversed coordinates of last significant coefficient flag is present in slice header syntax structure referring to the SPS; and signaling a general constraint information (GCI) reversed coordinates of last significant coefficient enabled flag in GCI syntax, wherein the GCI reversed coordinates of last significant coefficient enabled flag is used to provide general control of the SPS reversed coordinates of last significant coefficient enabled flag. ### Claim 13 (depends on 12) The method of claim 12, wherein a bit depth of video data is 11. ### Claim 14 (depends on 12) The method of claim 12, wherein a bit depth of video data is 12. ### Claim 15 A method for video encoding, comprising: signaling a Sequence Parameter Set (SPS) reversed coordinates of last significant coefficient enabled flag, that indicates whether a slice header (SH) reversed coordinates of last significant coefficient flag is present in slice header syntax structure referring to the SPS; and signaling a general constraint information (GCI) reversed coordinates of last significant coefficient enabled flag in GCI syntax, wherein the GCI reversed coordinates of last significant coefficient enabled flag is used to provide general control of the SPS reversed coordinates of last significant coefficient enabled flag. ### Claim 16 (depends on 15) The method for video encoding of claim 15, wherein a value of the SPS reversed coordinates of the last significant coefficient enabled flag being equal to 1 indicates that the SH reversed coordinates of the last significant coefficient enabled flag is present in the slice header syntax structure referring to the SPS; and the value of the SPS reversed coordinates of the last significant coefficient enabled flag being equal to 0 indicates that the SH reversed coordinates of the last significant coefficient enabled flag is not present in the slice header syntax structure referring to the SPS. ### Claim 17 (depends on 15) The method for video encoding of claim 15, wherein a value of the GCI reversed coordinates of the last significant coefficient enabled flag being equal to 1 indicates that a value of the SPS reversed coordinates of the last significant coefficient enabled flag equals to 0. ### Claim 18 (depends on 15) The method for video encoding of claim 15, wherein a bit depth of video data is 11. ### Claim 19 (depends on 15) The method for video encoding of claim 15, wherein a bit depth of video data is 12.