# US 2019/0320196 A1 · Motion Information Storage for Video Coding and Signaling > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0320196 A1 - Document ID: US20190320196A1 - Status: Published application - Kind: A1 - Application number: 16/383,556 - Filed: 2019-04-12 - Published: 2019-10-17 - Earliest claimed: 2018-04-12 - Assignees: ARRIS Enterprises LLC - Applicants: ARRIS Enterprises LLC - Inventors: Yue Yu; Krit Panusopone; Seungwook Hong; Limin Wang - Web page: https://patentgrep.com/patent/US20190320196A1 ## CPC - H04N 19/52: by predictive encoding - 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 19/109: among a plurality of temporal predictive coding modes - H04N 19/119: Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks - H04N 19/137: Motion inside a coding unit, e.g. average field, frame or block difference - 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 19/188: {the unit being a video data packet, e.g. a network abstraction layer [NAL] unit} - H04N 19/423: characterised by memory arrangements (H04N19/433 takes precedence) - H04N 19/426: using memory downsizing methods - H04N 19/513: Processing of motion vectors - H04N 19/517: by encoding - H04N 19/577: Motion compensation with bidirectional frame interpolation, i.e. using B-pictures - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A method is provided for inter-coding video in which encoder and decoder memory requirements associated with storage of motion information related to collocated coding units is reduced. In some embodiments motion information related to only a single or reduced set of collocated coding unit(s) may be stored at the encoder and decoder. In operation, motion information for multiple coding predictors is determined based upon scaling of motion information from motion information from one of the multiple coding predictors. Additionally, in some embodiments, where multiple lists of collocated picture are available for update, only of the multiple available lists may be updated. ## Claims ### Claim 1 A method of inter-coding comprising: determining motion information associated with a collocated picture set; determining motion information associated with a current coding unit; updating said motion information associated with said collocated picture set with motion information associated with said current coding unit, if it is determined that said motion information associated with said collocated picture set is to be updated with said motion information associated with said current coding unit; and encoding said current coding unit; wherein said encoded current coding unit includes an indicator identifying whether said motion information associated with said current coding unit is used to update said motion information associated with said collocated picture set. ### Claim 2 (depends on 1) The method of inter-coding of claim 1 wherein a plurality of collocated picture sets are available and one of said plurality of collocated picture sets is updated. ### Claim 3 (depends on 1) The method of inter-coding of claim 1 wherein said indicator is included in a NAL unit associated with said current coding unit. ### Claim 4 (depends on 3) The method of inter-coding of claim 3 wherein said indicator is included within a header of said NAL unit. ### Claim 5 (depends on 4) The method of inter-coding of claim 4 wherein said indicator is a single bit. ### Claim 6 (depends on 5) The method of inter-coding of claim 5 wherein said current coding unit is encoded according to HEVC. ### Claim 7 (depends on 5) The method of inter-coding of claim 5 wherein said current coding using is encoded according to VVC. ### Claim 8 (depends on 5) The method of inter-coding of claim 5 wherein said current coding using is encoded according to JVET. ### Claim 9 (depends on 1) The method of inter-coding of claim 1 further comprising: receiving said encoded current coding unit; determining whether said encoded current coding unit includes said indicator; and storing said motion information associated with said current coding unit as part of said collocated picture set, if said indicator is determined to be present. ### Claim 10 (depends on 9) The method of inter-coding of claim 9 wherein said indicator is included in a NAL unit associated with said current coding unit. ### Claim 11 (depends on 10) The method of inter-coding of claim 10 wherein said indicator is included within a header of said NAL unit. ### Claim 12 (depends on 11) The method of inter-coding of claim 11 wherein said indicator is a single bit. ### Claim 13 (depends on 12) The method of inter-coding of claim 12 wherein said current coding unit is decoded according to HEVC. ### Claim 14 (depends on 12) The method of inter-coding of claim 12 wherein said current coding using is decoded according to VVC. ### Claim 15 (depends on 12) The method of inter-coding of claim 12 wherein said current coding using is decoded according to JVET. ### Claim 16 A system of inter-coding comprising: storing in an encoder memory motion information associated with a collocated picture set; storing in said encoder memory motion information associated with a current coding unit; updating said encoder memory with motion information associated with said collocated picture set with motion information associated with said current coding unit, if it is determined that said motion information associated with said collocated picture set is to be updated with said motion information associated with said current coding unit; and encoding said current coding unit; wherein said encoded current coding unit includes an indicator identifying whether said motion information associated with said current coding unit is used to update said motion information associated with said collocated picture set. ### Claim 17 (depends on 16) The system of inter-coding of claim 16 further comprising: storing in a decoder memory said encoded current coding unit; determining whether said encoded current coding unit includes said indicator; and storing in a decoder memory said motion information associated with said current coding unit as part of said collocated picture set, if said indicator is determined to be present. ### Claim 18 (depends on 17) The system of inter-coding of claim 17 wherein said indicator is included in a NAL unit associated with said current coding unit. ### Claim 19 (depends on 18) The method of inter-coding of claim 18 wherein said indicator is included within a header of said NAL unit. ### Claim 20 (depends on 19) The method of inter-coding of claim 19 wherein said current coding unit is encoded according to at least one of HEVC, VVC and JVET.