# US 12,003,780 B2 · Device and method for decoding video data using maximum bit-depth constraint information > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,003,780 B2 - Document ID: US12003780B2 - Status: Granted - Kind: B2 - Application number: 17/967,164 - Filed: 2022-10-17 - Published: 2023-02-09 - Granted: 2024-06-04 - Earliest claimed: 2020-06-09 - Assignees: FG Innovation Company Limited - Applicants: FG Innovation Company Limited - Inventors: Yu-Chiao Yang - Web page: https://patentgrep.com/patent/US12003780B2 ## CPC - H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards - H04N 19/184: the unit being bits, e.g. of the compressed video stream - H04N 19/186: the unit being a colour or a chrominance component - H04N 19/61: in combination with predictive coding - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A method of decoding a bitstream by an electronic device is provided. The electronic device receives the bitstream. In addition, the electronic device determines, from the bitstream, a maximum constraint indication used for determining a maximum value of a bit-depth indication sps_bitdepth_minus8 included in a sequence parameter set (SPS) of the bitstream when the maximum constraint indication is a maximum bit-depth constraint indication. The maximum constraint indication does not impose a constraint on the maximum value of the bit-depth indication sps_bitdepth_minus8 when the maximum constraint indication is equal to zero. ## Claims ### Claim 1 A method of decoding a bitstream by an electronic device, the method comprising: receiving the bitstream; and determining, from the bitstream, a maximum constraint indication used for determining a maximum value of a bit-depth indication sps_bitdepth_minus8 included in a sequence parameter set (SPS) of the bitstream when the maximum constraint indication is a maximum bit-depth constraint indication, wherein the maximum constraint indication does not impose a constraint on the maximum value of the bit-depth indication sps_bitdepth_minus8 when the maximum constraint indication is equal to zero. ### Claim 2 (depends on 1) The method according to claim 1, wherein a value of the maximum bit-depth constraint indication is in a range of zero to eight. ### Claim 3 (depends on 1) The method according to claim 1, wherein the maximum value of the bit-depth indication sps_bitdepth_minus8 is calculated by the maximum constraint indication and a constant value when the maximum constraint indication is greater than zero. ### Claim 4 (depends on 3) The method according to claim 3, wherein the maximum value of the bit-depth indication sps_bitdepth_minus8 is calculated by subtracting the constant value from the maximum constraint indication when the maximum constraint indication is greater than zero. ### Claim 5 An electronic device for decoding a bitstream, the electronic device comprising: at least one processor; and at least one storage device coupled to the at least one processor and storing a plurality of computer-executable instructions which, when executed by the at least one processor, cause the electronic device to: receive the bitstream; and determine, from the bitstream, a maximum constraint indication used for determining a maximum value of a bit-depth indication sps_bitdepth_minus8 included in a sequence parameter set (SPS) of the bitstream when the maximum constraint indication is a maximum bit-depth constraint indication, wherein the maximum constraint indication does not impose a constraint on the maximum value of the bit-depth indication sps_bitdepth_minus8 when the maximum constraint indication is equal to zero. ### Claim 6 (depends on 5) The electronic device according to claim 5, wherein a value of the maximum bit-depth constraint indication is in a range of zero to eight. ### Claim 7 (depends on 5) The electronic device according to claim 5, wherein the maximum value of the bit-depth indication sps_bitdepth_minus8 is calculated by the maximum constraint indication and a constant value when the maximum constraint indication is greater than zero. ### Claim 8 (depends on 7) The electronic device according to claim 7, wherein the maximum value of the bit-depth indication sps_bitdepth_minus8 is calculated by subtracting the constant value from the maximum constraint indication when the maximum constraint indication is greater than zero. ### Claim 9 A method of decoding a bitstream by an electronic device, the method comprising: receiving the bitstream; determining, from a sequence parameter set (SPS) of the bitstream, a bit-depth indication sps_bitdepth_minus8 indicating a bit-depth parameter of a plurality of image frames in a video sequence; and determining, from the bitstream, a maximum bit-depth constraint indication, wherein the maximum bit-depth constraint indication does not impose a constraint on the bit-depth indication sps_bitdepth_minus8 when the maximum bit-depth constraint indication is equal to zero. ### Claim 10 (depends on 9) The method according to claim 9, wherein a maximum value of the bit-depth indication sps_bitdepth_minus8 is determined based on the maximum bit-depth constraint indication when the maximum bit-depth constraint indication is greater than zero.