-
公开(公告)号：US12132889B2
公开(公告)日：2024-10-29
申请号：US18190477
申请日：2023-03-27
发明人： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC分类号： H04N19/105 , H04N19/109 , H04N19/159 , H04N19/176 , H04N19/513 , H04N19/52 , H04N19/577
CPC分类号： H04N19/105 , H04N19/109 , H04N19/159 , H04N19/176 , H04N19/513 , H04N19/52 , H04N19/577
摘要： A video coding or decoding method includes using history-based motion vector prediction (HMVP) for conversion between multiple video blocks including a current block of video and a bitstream representation of the multiple video blocks such that for a uni-predicted block that for which a single reference picture is used for motion compensation, refraining from updating a look-up table for HMVP candidates for the uni-predicted block. The video coding or decoding method further includes performing the conversion using look-up tables for the multiple video blocks.
-
公开(公告)号：US20240357127A1
公开(公告)日：2024-10-24
申请号：US18614268
申请日：2024-03-22
申请人： LX Semicon Co., Ltd.
发明人： Dong San JUN , Ha Hyun LEE , Jung Won KANG , Hyun Suk KO , Sung Chang LIM , Jin Ho LEE , Seung Hyun CHO , Hui Yong KIM , Jin Soo CHOI
IPC分类号： H04N19/159 , H04N19/105 , H04N19/126 , H04N19/13 , H04N19/176 , H04N19/463 , H04N19/513 , H04N19/593 , H04N19/96
CPC分类号： H04N19/159 , H04N19/105 , H04N19/126 , H04N19/13 , H04N19/176 , H04N19/463 , H04N19/513 , H04N19/593 , H04N19/96
摘要： The present invention relates to a method for encoding/decoding a video. To this end, the method for decoding a video may include: deriving a spatial merge candidate from at least one of spatial candidate blocks of a current block, deriving a temporal merge candidate from a co-located block of the current block, and generating a prediction block of the current block based on at least one of the derived spatial merge candidate and the derived temporal merge candidate, wherein a reference picture for the temporal merge candidate is selected based on a reference picture list of a current picture including the current block and a reference picture list of a co-located picture including the co-located block.
-
公开(公告)号：US12126825B2
公开(公告)日：2024-10-22
申请号：US18342514
申请日：2023-06-27
发明人： Hongbin Liu , Li Zhang , Kai Zhang , Yue Wang
IPC分类号： H04N19/176 , H04N19/44 , H04N19/513 , H04N19/56
CPC分类号： H04N19/513 , H04N19/176 , H04N19/44 , H04N19/56
摘要： Methods of enabling and disabling a decoder-side motion vector refinement (DMVR) video decoder and/or encoder are described. One example method includes determining a width (W) and a height (H) of a video block, making a determination, based on a condition of the video block, between enabling and disabling a decoder side motion vector refinement step for a conversion between the video block and a coded representation of the video block, in a case that the determination is enabling, performing the conversion by enabling the decoder side motion vector refinement step; and in a case that the determination is disabling, performing the conversion by disabling the decoder side motion vector refinement step, wherein the decoder side motion vector refinement step includes refining value of a motion vector signaled in the coded representation and using the refined value during the conversion.
-
公开(公告)号：US12108076B2
公开(公告)日：2024-10-01
申请号：US17971255
申请日：2022-10-21
申请人： Tencent America LLC
发明人： Lien-Fei Chen , Xiang Li , Shan Liu
IPC分类号： H04N19/577 , H04N19/105 , H04N19/139 , H04N19/176 , H04N19/513
CPC分类号： H04N19/577 , H04N19/105 , H04N19/139 , H04N19/176 , H04N19/513
摘要： Aspects of the disclosure provide a method and an apparatus for video decoding. The apparatus includes processing circuitry that decodes prediction information indicating bi-prediction with coding unit (CU)-level weights (BCW) for a current block in a current picture. The processing circuitry performs template matching (TM) on BCW candidate weights by determining a respective TM cost corresponding to each BCW candidate weight. Each TM cost is determined based on a portion or all of a current template of the current block and a respective bi-predictor template. The bi-predictor template is based on the respective BCW candidate weight, a portion or all of a first reference template in a first reference picture, and a portion or all of a second reference template in a second reference picture. The processing circuitry reorders the BCW candidate weights based on the respectively determined TM costs.
-
公开(公告)号：US12108073B2
公开(公告)日：2024-10-01
申请号：US18217840
申请日：2023-07-03
发明人： Jing Ya Li , Chong Soon Lim , Ru Ling Liao , Han Boon Teo , Hai Wei Sun , Che Wei Kuo , Kiyofumi Abe , Takahiro Nishi , Tadamasa Toma
IPC分类号： H04N19/00 , H04N19/139 , H04N19/159 , H04N19/176 , H04N19/513
CPC分类号： H04N19/513 , H04N19/139 , H04N19/159 , H04N19/176
摘要： Provided is an encoder including circuitry and memory coupled to the circuitry. A prediction mode for a current block is an affine mode, and in operation, the circuitry: derives a base motion vector which is a motion vector to be used in a prediction process for the current block, and is a motion vector at an affine-mode control point in the current block; derives a first motion vector different from the base motion vector; derives a motion vector difference based on a difference between the base motion vector and the first motion vector; determines whether the motion vector difference is greater than a threshold; if so, modifies a second motion vector different from the base motion vector and the first motion vector, and if not, does not modify the second motion vector; and encodes the current block using the second motion vector modified or the second motion vector not modified.
-
公开(公告)号：US12108072B2
公开(公告)日：2024-10-01
申请号：US17386346
申请日：2021-07-27
发明人： Hongbin Liu , Li Zhang , Kai Zhang , Yue Wang
IPC分类号： H04N19/513 , H04N19/176
CPC分类号： H04N19/513 , H04N19/176
摘要： A method for video processing is provided. The method includes making a determination, for a conversion between a current video block of a video and a coded representation of the current video block, whether to use a symmetric motion vector difference (SMVD) mode based on a currently selected best mode for the conversion; and performing the conversion based on the determining.
-
公开(公告)号：US12108030B2
公开(公告)日：2024-10-01
申请号：US17396648
申请日：2021-08-06
发明人： Yi-Wen Chen , Xiaoyu Xiu , Xianglin Wang , Tsung-Chuan Ma
IPC分类号： H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/513
CPC分类号： H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/513
摘要： Methods of selectively applying Bi-directional Optical Flow (BDOF) and Decoder-side Motion Vector Refinement (DMVR) on inter mode coded blocks employed in video coding standards, such as the now-current Versatile Video Coding (VVC) design, are performed at a computing device. In one method, when a current block is eligible for both applications of DMVR and BDOF based on a plurality of pre-defined conditions, the computing device uses a pre-defined criterion to classify the current block and then uses the classification in applying either BDOF or DMVR, but not both, on the block.
-
公开(公告)号：US20240314347A1
公开(公告)日：2024-09-19
申请号：US18677982
申请日：2024-05-30
IPC分类号： H04N19/513
CPC分类号： H04N19/513
摘要： In the related art, in some cases the weighted prediction processing is performed even in a case that normal prediction processing is to be performed. A video decoding apparatus includes a weighted prediction processing unit configured to decode a weight coefficient and an offset value from coded data and to generate a prediction image by multiplying an interpolation image by the weight coefficient and adding the offset value to the interpolation image, and a normal prediction processing unit configured to generate a prediction image from the interpolation image. In a case that in the weighted prediction processing unit, a bi-prediction is performed and information of the weight coefficient and the offset value is absent for both a reference list 0 and a reference list 1, the normal prediction processing unit generates a bi-prediction image.
-
公开(公告)号：US20240314346A1
公开(公告)日：2024-09-19
申请号：US18671747
申请日：2024-05-22
发明人： Zhipin DENG , Kai ZHANG , Li ZHANG , Yuwen HE
IPC分类号： H04N19/513 , H04N19/176
CPC分类号： H04N19/513 , H04N19/176
摘要： Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: refining, during a conversion between a target block of a video and a bitstream of the target block, a bi-motion vector predictor (MVP) of the target block by applying a decoder side motion vector derivation process, and wherein the target block is coded with an advanced motion vector prediction (AMVP) mode; and performing the conversion based on the refined bi-MVP.
-
公开(公告)号：US12096020B2
公开(公告)日：2024-09-17
申请号：US17734959
申请日：2022-05-02
申请人： LG ELECTRONICS INC.
发明人： Jungdong Seo , Jaehyun Lim
IPC分类号： H04N11/02 , H04N19/105 , H04N19/109 , H04N19/119 , H04N19/13 , H04N19/139 , H04N19/172 , H04N19/176 , H04N19/44 , H04N19/513 , H04N19/91
CPC分类号： H04N19/513 , H04N19/105 , H04N19/109 , H04N19/119 , H04N19/13 , H04N19/139 , H04N19/172 , H04N19/176 , H04N19/44 , H04N19/91
摘要： An image decoding method performed by a decoding device according to the present invention comprises the steps of: acquiring information on inter prediction of a target block through a bit stream; deriving motion information of the target block on the basis of the information on inter prediction; deriving a prediction sample by performing inter prediction for the target block on the basis of the motion information; generating a reconstruction block on the basis of the prediction sample; deriving modified motion information of the target block on the basis of the reconstruction block; and updating the motion information of the target block on the basis of the modified motion information. According to the present invention, modified motion information of the target block can be calculated, and the motion information of the target block can be updated on the basis of the modified motion information, so that the overall coding efficiency can be improved.
-
-
-
-
-
-
-
-
-
搜索结果
4253 条记录 (耗时 0.034 秒)
