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公开(公告)号：US12238308B2
公开(公告)日：2025-02-25
申请号：US17763648
申请日：2020-09-24
Applicant: Maxell, Ltd.
Inventor： Takuya Shimizu
IPC: H04N19/159 , H04N19/176 , H04N19/196
Abstract: More suitable image encoding technique and image decoding technique are provided. An image encoding method for encoding an image includes: a predicted image generation step of generating a predicted image of a synthesis prediction by performing synthesis processing of synthesizing a predicted image of an inter prediction and a predicted image of an intra prediction to an encoding-target block; and an encoding step of encoding a difference between the predicted image generated in the predicted image generation step and a pixel value of an image of the encoding-target block, the synthesizing processing includes weighting processing performed to the predicted image of the inter prediction and the predicted image of the intra prediction, and a weighting parameter of the weighting processing is determined in accordance with a type of the intra prediction.
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公开(公告)号：US20250063192A1
公开(公告)日：2025-02-20
申请号：US18913903
申请日：2024-10-11
Inventor： Na ZHANG , Jizheng XU , Kai ZHANG , Mehdi SALEHIFAR , Li ZHANG
IPC: H04N19/513 , H04N19/105 , H04N19/139 , H04N19/196 , H04N19/58
Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: determining, for a conversion between a current video block of a video and a bitstream of the video, that a first prediction mode is applied to the current block, reordering, in the first prediction mode, at least a first set of block vector difference (BVD) candidates of multiple BVD candidates corresponding to a first base candidate according to at least one criterion; deriving, based on the reordered BVD candidates, a block vector for the current video block; and performing the conversion based on the motion information.
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公开(公告)号：US20250063179A1
公开(公告)日：2025-02-20
申请号：US18724568
申请日：2022-12-30
Applicant: LG ELECTRONICS INC.
Inventor： Jangwon CHOI , Jaehyun LIM , Sunmi YOO , Jungah CHOI
IPC: H04N19/159 , H04N19/132 , H04N19/186 , H04N19/196
Abstract: Provided are an image encoding/decoding method and apparatus. An image decoding method may comprise deriving chroma reference samples located around a chroma block and luma reference samples corresponding to the chroma reference samples based on an intra prediction mode of the chroma block being a cross-component linear model (CCLM) mode, deriving CCLM parameters based on the chroma reference samples and the luma reference samples, and generating a prediction sample of the chroma block based on the CCLM parameters. The chroma reference samples may be obtained from two or more chroma reference lines adjacent to the chroma block.
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公开(公告)号：US20250056022A1
公开(公告)日：2025-02-13
申请号：US18924776
申请日：2024-10-23
Inventor： Yue YU , Haoping YU
IPC: H04N19/196 , H04N19/13 , H04N19/167 , H04N19/176 , H04N19/436 , H04N19/96
Abstract: A method for decoding a video from a video bitstream is provided and includes: accessing a binary string representing a partition of the video, the partition comprising a plurality of coding tree units (CTUs) forming one or more CTU rows; for each CTU of the plurality of CTUs in the partition, determining whether the CTU is the first CTU in a slice or a tile; in response to determining that the CTU is the first CTU in a slice or a tile, initializing context variables for context-adaptive binary arithmetic coding (CABAC) according to a first context variable initialization process; in response to determining that the CTU is not the first CTU in a slice or a tile, determining whether parallel decoding is enabled and the CTU is the first CTU in a CTU row of a tile.
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公开(公告)号：US20250056001A1
公开(公告)日：2025-02-13
申请号：US18931813
申请日：2024-10-30
Inventor： Feng LUO , Jinxi XIANG , Kuan TIAN , Jun ZHANG
IPC: H04N19/137 , H04N19/172 , H04N19/182 , H04N19/196 , H04N19/42 , H04N19/60 , H04N19/91
Abstract: This application discloses a video compression method, a video decoding method, and related apparatuses. The method includes: extracting a key point from a to-be-processed video frame and a previous video frame respectively to obtain first position information and second position information; performing motion estimation based on the first position information and the second position information to obtain motion information; performing image inpainting based on the motion information and the previous video frame to obtain an initial video frame; determining a latent feature based on the to-be-processed video frame and the initial video frame; and performing video compression based on the first position information, the second position information, and the latent feature to obtain a video compressed file.
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公开(公告)号：US20250047881A1
公开(公告)日：2025-02-06
申请号：US18709164
申请日：2022-11-10
Inventor： Fangdong CHEN , Yan WANG
IPC: H04N19/196 , H04N19/105 , H04N19/119 , H04N19/167 , H04N19/176 , H04N19/70
Abstract: The present disclosure discloses picture decoding methods and apparatuses, and picture encoding methods and apparatuses, relating to the field of video coding and decoding technologies, and solving the problem of low prediction efficiency in a process of picture coding and decoding (or video coding and decoding). The picture decoding method includes: parsing a bit stream to obtain a syntax element, where the syntax element is configured to obtain a residual block of a to-be-decoded unit, and the to-be-decoded unit includes at least one prediction group; determining a prediction mode of any one prediction group in the at least one prediction group; obtaining a prediction value of the any one prediction group by performing prediction for the any one prediction group with the prediction mode; and decoding the to-be-decoded unit based on the residual block of the to-be-decoded unit and the prediction value of each one in the at least one prediction group.
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公开(公告)号：US20250047866A1
公开(公告)日：2025-02-06
申请号：US18927576
申请日：2024-10-25
Inventor： Yue YU , Haoping YU
IPC: H04N19/152 , H04N19/119 , H04N19/169 , H04N19/18 , H04N19/182 , H04N19/186 , H04N19/196 , H04N19/436 , H04N19/70
Abstract: A video decoder decodes a video from a video bitstream encoded using Versatile Video Coding (VVC). The video decoder determines a bit depth of samples of the video based on Sequence Parameter Set (SPS) syntax element sps_bitdepth_minus8 whose value is in the range of 0 to 8. The decoder further determines the size of a decoded picture buffer (DPB) based on a Video Parameter Set (VPS) syntax element vps_ols_dpb_bitdepth_minus8 whose value is in the range of 0 to 8. The decoder allocates a storage space with the determined size of the DPB, decodes the video bitstream based on the determined bit depth, and thus obtains and stores a decoded picture in the DPB. The decoder further outputs the decoded picture.
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公开(公告)号：US20250047845A1
公开(公告)日：2025-02-06
申请号：US18921372
申请日：2024-10-21
Applicant: Apple Inc.
Inventor： Bae Keun Lee
IPC: H04N19/119 , H04N19/105 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/179 , H04N19/182 , H04N19/194 , H04N19/196 , H04N19/31 , H04N19/33 , H04N19/426 , H04N19/46 , H04N19/61 , H04N19/625
Abstract: A video decoding method according to the present invention may comprise: a step for determining whether to divide a current block into a plurality of sub-blocks; a step for determining an intra prediction mode for the current block; and a step for performing intra prediction for each sub-block on the basis of the intra prediction mode, when the current block is divided into the plurality of sub-blocks.
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公开(公告)号：US12219181B2
公开(公告)日：2025-02-04
申请号：US18526330
申请日：2023-12-01
Inventor： Yanzhuo Ma , Junyan Huo , Qiang Gao , Fuzheng Yang , Shuai Wan
IPC: H04N19/96 , H04N19/132 , H04N19/167 , H04N19/196 , H04N19/44
Abstract: An image decoding method, a decoder and a storage medium are provided. The method includes: receiving code stream data, and parsing the code stream data to obtain a coding tree unit corresponding to the code stream data; parsing an i-th node of i-th layer corresponding to the coding tree unit to obtain i-th state parameter and i-th flag parameter corresponding to the i-th node; performing detection processing on the i-th node according to the i-th state parameter and the i-th flag parameter to obtain an i-th detection result; acquiring a (i+1)th node of a (i+1)th layer corresponding to the coding tree unit; continuing to perform detection processing on the (i+1)th node, and traversing all the nodes corresponding to the coding tree unit until all the coding unit data corresponding to the coding tree unit is obtained; and generating a decoded image corresponding to the code stream data.
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公开(公告)号：US20250030835A1
公开(公告)日：2025-01-23
申请号：US18770700
申请日：2024-07-12
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: H04N19/105 , H04N19/117 , H04N19/136 , H04N19/186 , H04N19/196
Abstract: The present disclosure relates to the field of picture processing. In particular, the present disclosure relates to improving intra prediction (such as the chroma intra prediction) using a cross component linear model (CCLM) and, more particularly, relating to spatial filtering used in a cross-component linear model for intra prediction with different chroma formats. An apparatus, an encoder, a decoder and corresponding methods for cross-component prediction for a picture, in which the set of down-sampling filters applied during the prediction depends on a chroma format, that may be one of multiple supported chroma formats are provided, so as to improve coding efficiency.
