# US 12,015,768 B2 · Interactions between sub-block based intra block copy and different coding tools > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,015,768 B2 - Document ID: US12015768B2 - Status: Granted - Kind: B2 - Application number: 17/541,069 - Filed: 2021-12-02 - Published: 2022-03-24 - Granted: 2024-06-18 - Earliest claimed: 2019-06-06 - Assignees: Beijing Bytedance Network Technology Co., Ltd.; Bytedance Inc. - Applicants: Beijing Bytedance Network Technology Co., Ltd.; Bytedance Inc. - Inventors: Li Zhang; Kai Zhang; Hongbin Liu; Yue Wang - Web page: https://patentgrep.com/patent/US12015768B2 ## CPC - H04N 19/107: between spatial and temporal predictive coding, e.g. picture refresh - H04N 19/105: Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction - H04N 19/117: Filters, e.g. for pre-processing or post-processing (sub-band filter banks H04N19/635) - H04N 19/119: Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks - H04N 19/139: Analysis of motion vectors, e.g. their magnitude, direction, variance or reliability - H04N 19/159: Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction - H04N 19/176: the region being a block, e.g. a macroblock - H04N 19/186: the unit being a colour or a chrominance component - H04N 19/593: involving spatial prediction techniques - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A method of video processing includes determining, for a conversion between a current block of a video and a bitstream of the video, that the current block is split into multiple sub-blocks, wherein each of the multiple sub-blocks is coded in the bitstream using a corresponding coding technique according to a pattern, and performing the conversion based on the determining. ## Claims ### Claim 1 A method of processing video data, comprising: determining, for a conversion between a current block of a video and a bitstream of the video, that the current block is split into multiple sub-blocks, wherein each of the multiple sub-blocks is coded in the bitstream using a corresponding coding technique according to a pattern; and performing the conversion based on the determining; wherein the pattern specifies that a first sub-block of the multiple sub-blocks is coded using a sub-block-based intra-block copy (sbIBC) coding technique in which reference samples from a video region are used. ### Claim 2 (depends on 1) The method of claim 1, wherein the pattern specifies that a second sub-block of the multiple sub-blocks is coded by using one selected from the group consisting of: an intra prediction coding technique in which samples from the same sub-block are used; a palette coding technique in which a palette of representative pixel values is used; and an inter coding technique in which temporal information is used. ### Claim 3 (depends on 1) The method of claim 1, wherein the pattern specifies that a first sub-block of the multiple sub-blocks is coded using an intra prediction coding technique in which samples from the same sub-block are used. ### Claim 4 (depends on 3) The method of claim 3, wherein the pattern specifies that a second sub-block of the multiple sub-blocks is coded using a palette coding technique in which a palette of representative pixel values is used or using an inter coding technique in which temporal information is used. ### Claim 5 (depends on 1) The method of claim 1, wherein a history-based table of motion candidates for a sub-block temporal motion vector prediction mode remains same for the conversion in case the pattern of one or more coding techniques applies to the current block, the history-based table of motion candidates determined based on motion information in past conversions. ### Claim 6 (depends on 1) The method of claim 1, wherein, in case the pattern specifies that at least one sub-block of the multiple sub-blocks is coded using the IBC coding technique, one or more motion vectors for the at least one sub-block are used to update a history-based table of motion candidates for an IBC sub-block temporal motion vector prediction mode, the history-based table of motion candidates determined based on motion information in past conversions. ### Claim 7 (depends on 1) The method of claim 1, wherein, in case the pattern specifies that at least one sub-block of the multiple sub-blocks is coded using the inter coding technique, one or more motion vectors for the at least one sub-block are used to update a history-based table of motion candidates for a non-IBC sub-block temporal motion vector prediction mode, the history-based table of motion candidates determined based on motion information in past conversions. ### Claim 8 (depends on 1) The method of claim 1, wherein usage of a filtering process in which boundaries of the multiple sub-blocks are filtered is based on usage of the at least one coding technique according to the pattern. ### Claim 9 (depends on 8) The method of claim 8, wherein the filtering process filtering boundaries of the multiple sub-blocks is applied in case the at least one coding technique is applied. ### Claim 10 (depends on 1) The method of claim 1, wherein a second coding technique is disabled for the current block for the conversion according to the pattern. ### Claim 11 (depends on 1) The method of claim 1, wherein usage of the at least one coding technique according to the pattern is signaled in the bitstream. ### Claim 12 (depends on 11) The method of claim 11, wherein the at least one coding technique comprises the modified IBC coding technique, and the modified IBC coding technique is indicated in the bitstream based on an index value indicating a candidate in a motion candidate list. ### Claim 13 (depends on 1) The method of claim 1, wherein motion information of the multiple sub-blocks of the current block is used as a motion vector predictor for a conversion between a subsequent block of the video and the bitstream. ### Claim 14 (depends on 1) The method of claim 1, wherein motion information of the multiple sub-blocks of the current block is disallowed to be used for a conversion between a subsequent block of the video and the bitstream. ### Claim 15 (depends on 1) The method of claim 1, wherein the determining that the current block is split into the multiple sub-blocks coded using the at least one coding technique is based on whether a motion candidate is a candidate is applicable for a block of video or a sub-block within the block. ### Claim 16 (depends on 1) The method of claim 1, wherein the conversion includes encoding the current video block into the bitstream. ### Claim 17 (depends on 1) The method of claim 1, wherein the conversion includes decoding the current video block from the bitstream. ### Claim 18 An apparatus for processing video data comprising a processor and a non-transitory memory with instructions thereon, wherein the instructions upon execution by the processor, cause the processor to: determine, for a conversion between a current block of a video and a bitstream of the video, that the current block is split into multiple sub-blocks, wherein each of the multiple sub-blocks is coded in the bitstream using a corresponding coding technique according to a pattern; and perform the conversion based on the determining; wherein the pattern specifies that a first sub-block of the multiple sub-blocks is coded using a sub-block-based intra-block copy (sbIBC) coding technique in which reference samples from a video region are used. ### Claim 19 A non-transitory computer-readable recording medium storing a bitstream of a video which is generated by a method performed by a video processing apparatus, wherein the method comprises: determining that the current block is split into multiple sub-blocks, wherein each of the multiple sub-blocks is coded in the bitstream using a corresponding coding technique according to a pattern; and generating the bitstream based on the determining; wherein the pattern specifies that a first sub-block of the multiple sub-blocks is coded using a sub-block-based intra-block copy (sbIBC) coding technique in which reference samples from a video region are used.