# US 12,120,355 B2 · Methods and devices for high-level syntax in video coding > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,355 B2 - Document ID: US12120355B2 - Status: Granted - Kind: B2 - Application number: 17/959,021 - Filed: 2022-10-03 - Published: 2023-04-06 - Granted: 2024-10-15 - Earliest claimed: 2020-04-03 - Assignees: Beijing Dajia Internet Information Technology Co., Ltd. - Applicants: Beijing Dajia Internet Information Technology Co., Ltd. - Inventors: Hong-Jheng Jhu; Yi-Wen Chen; Xiaoyu Xiu; Tsung-Chuan Ma; Wei Chen; Xianglin Wang; Bing Yu - Web page: https://patentgrep.com/patent/US12120355B2 ## CPC - H04N 19/174: the region being a slice, e.g. a line of blocks or a group of blocks - H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards - H04N 19/159: Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction - H04N 19/172: the region being a picture, frame or field - H04N 19/176: the region being a block, e.g. a macroblock - H04N 19/44: Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder - H04N 19/577: Motion compensation with bidirectional frame interpolation, i.e. using B-pictures - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract Methods, devices, and storage mediums are provided for decoding video signals. A decoder receives at least one versatile video coding (VVC) syntax flag. The decoder receives, in response to a syntax element indicating that inter prediction is allowed, inter related syntax elements. The decoder obtains a first reference picture I(0) and a second reference picture I(1) associated with a video block in a bitstream. The decoder obtains first prediction samples I(0)(i,j) of the video block from a reference block in the first reference picture I(0). The decoder obtains second prediction samples I(1)(i,j) of the video block from a reference block in the second reference picture I(1). The decoder obtains bi-prediction samples based on the at least one VVC syntax flag, the inter related syntax elements, the first prediction samples I(0)(i,j), and the second prediction samples I(1)(i,j). ## Claims ### Claim 1 A method for decoding a video signal, comprising: receiving, by a decoder, inter prediction related syntax elements in sequence parameter set (SPS) level, wherein the inter prediction related syntax elements are sequentially arranged at a coding level, and wherein the inter prediction related syntax elements are arranged by: signaling an sps weighted pred flag flag; signaling an sps weighted bipred flag flag; signaling an sps mmvd enabled flag flag; setting a six minus max num merge cand value; and setting a log 2 parallel merge level minus2 value; obtaining, by the decoder, a first reference picture and a second reference picture associated with a video block in a bitstream, wherein the first reference picture is before a current picture and the second reference picture is after the current picture in a display order; obtaining, by the decoder, first prediction samples of the video block from the first reference picture; obtaining, by the decoder, second prediction samples of the video block from the second reference picture; and obtaining, by the decoder, bi-prediction samples based on at least one of the inter prediction related syntax elements, the first prediction samples, and the second prediction samples. ### Claim 2 (depends on 1) The method of claim 1, further comprising: receiving an sps_isp_enabled_flag flag after the log 2_parallel_merge_level_minus2. ### Claim 3 (depends on 1) The method of claim 1, further comprising: receiving an sps_wpp_entry_point_offsets_present_flag flag and log 2_max_pic_order_cnt_lsb_minus4 in succession. ### Claim 4 (depends on 3) The method of claim 3, wherein receiving the inter prediction related syntax elements comprises: receiving the sps_weighted_pred_flag flag after the log 2_max_pic_order_cnt_lsb_minus4. ### Claim 5 A computing device, comprising: one or more processors; and a non-transitory computer-readable storage medium storing instructions executable by the one or more processors, wherein the one or more processors are configured to: receive inter prediction related syntax elements in sequence parameter set (SPS) level, wherein the inter prediction related syntax elements are sequentially arranged at a coding level, and wherein the inter prediction related syntax elements are arranged by: signaling an sps weighted pred flag flag; signaling an sps weighted bipred flag flag; signaling an sps mmvd enabled flag flag; setting a six minus max num merge cand value; and setting a log 2 parallel merge level minus2 value; obtain a first reference picture and a second reference picture associated with a video block in a bitstream, wherein the first reference picture is before a current picture and the second reference picture is after the current picture in a display order; obtain first prediction samples of the video block from the first reference picture; obtain second prediction samples of the video block from the second reference picture; and obtain bi-prediction samples based on at least one of the inter prediction related syntax elements, the first prediction samples, and the second prediction samples. ### Claim 6 (depends on 5) The computing device of claim 5, further comprising: receiving an sps_isp_enabled_flag flag after the log 2_parallel_merge_level_minus2. ### Claim 7 (depends on 5) The computing device of claim 5, further comprising: receiving an sps_wpp_entry_point_offsets_present_flag flag and log 2_max_pic_order_cnt_lsb_minus4 in succession. ### Claim 8 (depends on 7) The computing device of claim 7, wherein receiving the inter prediction related syntax elements comprises: receiving the sps_weighted_pred_flag flag after the log 2_max_pic_order_cnt_lsb_minus4. ### Claim 9 A non-transitory computer-readable storage medium storing a bitstream to be decoded by acts comprising: receiving, by a decoder, inter prediction related syntax elements in sequence parameter set (SPS) level, wherein the inter prediction related syntax elements are sequentially arranged at a coding level, and wherein the inter prediction related syntax elements are arranged by: signaling an sps weighted pred flag flag; signaling an sps weighted bipred flag flag; signaling an sps mmvd enabled flag flag; setting a six minus max num merge cand value; and setting a log 2 parallel merge level minus2 value; obtaining, by the decoder, a first reference picture and a second reference picture associated with a video block in a bitstream, wherein the first reference picture is before a current picture and the second reference picture is after the current picture in a display order; obtaining, by the decoder, first prediction samples of the video block from the first reference picture; obtaining, by the decoder, second prediction samples of the video block from the second reference picture; and obtaining, by the decoder, bi-prediction samples based on at least one of the inter prediction related syntax elements, the first prediction samples, and the second prediction samples. ### Claim 10 (depends on 9) The non-transitory computer-readable storage medium of claim 9, wherein the acts further comprise: receiving an sps_isp_enabled_flag flag after the log 2_parallel_merge_level_minus2. ### Claim 11 (depends on 9) The non-transitory computer-readable storage medium of claim 9, wherein the acts further comprise: receiving an sps_wpp_entry_point_offsets_present_flag flag and log 2_max_pic_order_cnt_lsb_minus4 in succession. ### Claim 12 (depends on 11) The non-transitory computer-readable storage medium of claim 11, wherein the acts further comprise: receiving the sps_weighted_pred_flag flag after the log 2_max_pic_order_cnt_lsb_minus4.