# US 12,120,285 B2 · Signaling a cancel flag in a video bitstream > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,285 B2 - Document ID: US12120285B2 - Status: Granted - Kind: B2 - Application number: 18/327,657 - Filed: 2023-06-01 - Published: 2023-12-07 - Granted: 2024-10-15 - Earliest claimed: 2018-03-21 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Ye-Kui Wang - Web page: https://patentgrep.com/patent/US12120285B2 ## CPC - H04N 13/194: Transmission of image signals - H04N 13/161: Encoding, multiplexing or demultiplexing different image signal components (for multi-view video sequence encoding H04N19/597) - H04N 19/176: the region being a block, e.g. a macroblock - H04N 19/184: the unit being bits, e.g. of the compressed video stream - H04N 19/463: by compressing encoding parameters before transmission - H04N 19/597: specially adapted for multi-view video sequence encoding - H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A method of coding implemented by a video encoder. The method includes encoding a representation of video data into a bitstream, the bitstream being prohibited from including a fisheye supplemental enhancement information (SEI) message and one of a projection indication SEI message and a frame packing indication SEI message that both apply to any particular coded picture in the bitstream; and transmitting the bitstream to the video decoder. ## Claims ### Claim 1 A non-transitory computer-readable storage medium storing a bitstream of a video, the bitstream comprising a frame packing arrangement supplemental enhancement information (SEI) message that applies to a picture, the frame packing arrangement SEI message including a frame packing arrangement cancel flag equal to zero to indicate that a second SEI message that applies to the picture and has a second cancel flag equal to zero is not present, wherein the second SEI message is a different type of SEI message than the frame packing SEI message, and wherein the frame packing arrangement cancel flag equal to zero also indicates that a video decoder shall ignore SEI messages of the different type. ### Claim 2 (depends on 1) The storage medium of claim 1, wherein the second SEI message corresponds to omnidirectional video. ### Claim 3 (depends on 1) The storage medium of claim 1, wherein the second cancel flag corresponds to omnidirectional video. ### Claim 4 (depends on 1) The storage medium of claim 1, wherein the second SEI message comprises a fisheye video information SEI message. ### Claim 5 (depends on 1) The storage medium of claim 1, wherein the second cancel flag comprises a fisheye_cancel_flag. ### Claim 6 A non-transitory computer-readable storage medium storing instructions that, wherein executed by one or more processors, cause a video processing apparatus to: receive an encoded bitstream containing a frame packing arrangement supplemental enhancement information (SEI) message that applies to a picture, the frame packing arrangement SEI message including a frame packing arrangement cancel flag equal to zero to indicate that a second SEI message that applies to the picture and has a second cancel flag equal to zero is not present, wherein the second SEI message is a different type of SEI message than the frame packing SEI message, and wherein the frame packing arrangement cancel flag equal to zero also indicates that a video decoder shall ignore SEI messages of the different type; and decode the encoded bitstream according to the frame packing arrangement cancel flag. ### Claim 7 (depends on 6) The storage medium of claim 6, wherein the second SEI message corresponds to omnidirectional video. ### Claim 8 (depends on 6) The storage medium of claim 6, wherein the second cancel flag corresponds to omnidirectional video. ### Claim 9 (depends on 6) The storage medium of claim 6, wherein the second SEI message comprises a fisheye video information SEI message. ### Claim 10 (depends on 6) The storage medium of claim 6, wherein the second cancel flag comprises a fisheye_cancel_flag. ### Claim 11 A non-transitory computer-readable storage medium storing instructions that, wherein executed by one or more processors, cause a video processing apparatus to: encode a frame packing arrangement supplemental enhancement information (SEI) message that applies to a picture into a bitstream, the frame packing arrangement SEI message including a frame packing arrangement cancel flag equal to zero to indicate that a second SEI message that applies to the picture and has a second cancel flag equal to zero is not present, wherein the second SEI message is a different type of SEI message than the frame packing SEI message, and wherein the frame packing arrangement cancel flag equal to zero also indicates that a video decoder shall ignore SEI messages of the different type; and transmit the bitstream toward the video decoder. ### Claim 12 (depends on 11) The storage medium of claim 11, wherein the second SEI message corresponds to omnidirectional video. ### Claim 13 (depends on 11) The storage medium of claim 11, wherein the second cancel flag corresponds to omnidirectional video. ### Claim 14 (depends on 11) The storage medium of claim 11, wherein the second SEI message comprises a fisheye video information SEI message. ### Claim 15 (depends on 11) The storage medium of claim 11, wherein the second cancel flag comprises a fisheye_cancel_flag.