公开(公告)号：US20240357157A1

公开(公告)日：2024-10-24

申请号：US18763028

申请日：2024-07-03

申请人： Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

发明人： Hongbin Liu ,  Li Zhang ,  Kai Zhang ,  Jizheng Xu ,  Yue Wang

IPC分类号： H04N19/52 ,  H04N19/132 ,  H04N19/137 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186 ,  H04N19/46 ,  H04N19/513 ,  H04N19/577

CPC分类号： H04N19/52 ,  H04N19/132 ,  H04N19/137 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186 ,  H04N19/46 ,  H04N19/513 ,  H04N19/577

摘要： One example method of video processing includes implementing, by a processor, a decoder-side motion vector derivation (DMVD) scheme for motion vector refinement during a conversion between a current video block and a bitstream representation of the current video block by deriving parameters based on a deriving rule. The conversion may include compressing the current video block into the bitstream representation or uncompressing the bitstream representation into pixel values of the current video block.

公开(公告)号：US20240283941A1

公开(公告)日：2024-08-22

申请号：US18625935

申请日：2024-04-03

申请人： Sun Patent Trust

发明人： Toshiyasu SUGIO ,  Takahiro NISHI ,  Youji SHIBAHARA ,  Kyoko TANIKAWA ,  Hisao SASAI ,  Toru MATSUNOBU

IPC分类号： H04N19/139 ,  H04N19/102 ,  H04N19/105 ,  H04N19/13 ,  H04N19/134 ,  H04N19/176 ,  H04N19/184 ,  H04N19/196 ,  H04N19/51 ,  H04N19/52 ,  H04N19/577 ,  H04N19/70

CPC分类号： H04N19/139 ,  H04N19/102 ,  H04N19/105 ,  H04N19/13 ,  H04N19/134 ,  H04N19/176 ,  H04N19/51 ,  H04N19/52 ,  H04N19/577 ,  H04N19/70 ,  H04N19/184 ,  H04N19/197

摘要： A method for transmitting a bitstream via a network is provided. The bitstream being generated by: deriving a first candidate having a first motion vector that has been used to code a first block; deriving a second candidate having a second motion vector and a first reference picture index value that identifies a first reference picture corresponding to the second motion vector, with the second motion vector being a first zero vector; deriving a third candidate having a third motion vector and a second reference picture index value that identifies a second reference picture corresponding to the third motion vector, with the third motion vector being a second zero vector. One candidate from a plurality of candidates, including the first, second, and third candidate is selected, and an index identifying the selected one candidate is coded.

公开(公告)号：US12069297B2

公开(公告)日：2024-08-20

申请号：US17714916

申请日：2022-04-06

申请人： BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD.

发明人： Xiaoyu Xiu ,  Yi-Wen Chen ,  Xianglin Wang ,  Bing Yu

IPC分类号： H04N19/00 ,  H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/176 ,  H04N19/513 ,  H04N19/577 ,  H04N19/70

CPC分类号： H04N19/577 ,  H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/176 ,  H04N19/513 ,  H04N19/70

摘要： A bit-depth representation method, apparatus, and a non-transitory computer-readable storage medium are provided. A decoder obtains a reference picture I associated with a video block within the video signal. The decoder obtains prediction samples of the video block from a reference block in the reference picture I. The decoder controls internal PROF parameters of a PROF derivation process by applying right-shifting to the internal PROF parameters based on a bit-shift value to achieve a preset precision. The decoder obtains prediction refinement values for samples in the video block based on the PROF derivation process being applied to the video block based on the prediction samples. The decoder obtains prediction samples of the video block based on the combination of the prediction samples and the prediction refinement values.

公开(公告)号：US12069280B2

公开(公告)日：2024-08-20

申请号：US17673879

申请日：2022-02-17

申请人： SK TELECOM CO., LTD.

发明人： Jeong-yeon Lim ,  Hyo Song Kim ,  Se-hoon Son ,  Jae-seob Shin ,  Sun-young Lee

IPC分类号： H04N19/176 ,  H04N19/105 ,  H04N19/577

CPC分类号： H04N19/176 ,  H04N19/105 ,  H04N19/577

摘要： Disclosed herein is a method for adaptive bidirectional optical flow estimation for inter prediction compensation during video encoding. The method aims to reduce complexity and/or cost of bidirectional optical flow (BIO) at a pixel level or a subblock level.

公开(公告)号：US12047586B2

公开(公告)日：2024-07-23

申请号：US17982946

申请日：2022-11-08

申请人： TENCENT AMERICA LLC

发明人： Liang Zhao ,  Xin Zhao ,  Han Gao ,  Shan Liu

IPC分类号： H04N19/159 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/30 ,  H04N19/46 ,  H04N19/52 ,  H04N19/577 ,  H04N19/44

CPC分类号： H04N19/159 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/30 ,  H04N19/46 ,  H04N19/52 ,  H04N19/577 ,  H04N19/44

摘要： A method performed by a video decoder includes receiving a coded video bitstream including a current picture, a first reference picture, a second reference picture, and a joint motion vector difference (JMVD) associated with at least one block in the current picture. The method includes determining whether one or more scaling factors are used for an adaptive motion vector difference resolution (AMVD) based JMVD based on a predetermined condition. The method includes, in response to determining the one or more scaling factors are used for the AMVD based JMVD, scaling the JMVD based on the one or more scaling factors. The method includes deriving a first MVD for the first reference picture based on the scaled JMVD. The method includes deriving a second MVD for the second reference picture based on the derived first MVD. The method includes reconstructing the at least one block based on the derived first MVD and the derived second MVD.

公开(公告)号：US20240244253A1

公开(公告)日：2024-07-18

申请号：US18623846

申请日：2024-04-01

申请人： VID SCALE, INC.

发明人： Xiaoyu Xiu ,  Yuwen He ,  Yan Ye

IPC分类号： H04N19/513 ,  H04N19/176 ,  H04N19/577 ,  H04N19/86

CPC分类号： H04N19/521 ,  H04N19/176 ,  H04N19/577 ,  H04N19/86

摘要： Embodiments of video coding systems and methods are described for reducing coding latency introduced by decoder-side motion vector refinement (DMVR). In one example, two non-refined motion vectors are identified for coding of a first block of samples (e.g. a first coding unit) using bi-prediction. One or both of the non-refined motion vectors are used to predict motion information for a second block of samples (e.g. a second coding unit). The two non-refined motion vectors are refined using DMVR, and the refined motion vectors are used to generate a prediction signal of the first block of samples. Such embodiments allow the second block of samples to be coded substantially in parallel with the first block without waiting for completion of DMVR on the first block. In additional embodiments, optical-flow-based techniques are described for motion vector refinement.

公开(公告)号：US12028511B2

公开(公告)日：2024-07-02

申请号：US17342033

申请日：2021-06-08

申请人： LG Electronics Inc.

发明人： Jaehyun Lim ,  Jungsun Kim ,  Seungwook Park ,  Jaewon Sung ,  Byeongmoon Jeon ,  Joonyoung Park ,  Yongjoon Jeon ,  Younghee Choi

IPC分类号： H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/50 ,  H04N19/513 ,  H04N19/56 ,  H04N19/573 ,  H04N19/577

CPC分类号： H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/50 ,  H04N19/513 ,  H04N19/56 ,  H04N19/573 ,  H04N19/577

摘要： The present invention relates to a method and apparatus for encoding or decoding a video signal. According to the present invention, a plurality of reference units for image prediction of the current unit is acquired and combined to obtain a unit prediction value, thereby improving the accuracy of image prediction. More particularly, the present invention relates to a method for inducing a variety of reference units using a motion vector prediction value or a motion vector which is used in conventional inter-prediction, and also relates to a method which combines the reference units so as to obtain the prediction value for the current unit. In addition, the present invention relates to a method which involves acquiring a plurality of reference units for a merging mode, and combining the reference units so as to perform image prediction.

公开(公告)号：US12022109B2

公开(公告)日：2024-06-25

申请号：US18128757

申请日：2023-03-30

申请人： LG Electronics Inc.

发明人： Jaeho Lee ,  Seunghwan Kim

IPC分类号： H04N19/52 ,  H04N19/105 ,  H04N19/119 ,  H04N19/132 ,  H04N19/139 ,  H04N19/176 ,  H04N19/463 ,  H04N19/513 ,  H04N19/577

CPC分类号： H04N19/52 ,  H04N19/132 ,  H04N19/139 ,  H04N19/577

摘要： An image decoding method performed by a decoding device according to the present disclosure comprises: a step of deriving reference picture list 0 (L0) and reference picture list 1 (L1); a step of deriving two motion vectors (MV) for a current block, the two MVs including MVL0 for the L0 and MVL1 for the L1; a step of determining whether to apply bi-prediction optical flow (BIO) prediction for deriving refined motion vectors by sub-blocks to the current block; a step of deriving a refined motion vector for a sub-block of the current block based on the MVL0 and MVL1, if the BIO prediction is applied to the current block; and a step of deriving a prediction sample based on the refined motion vector.

公开(公告)号：US12022065B2

公开(公告)日：2024-06-25

申请号：US17694979

申请日：2022-03-15

申请人： Sun Patent Trust

发明人： Toshiyasu Sugio ,  Takahiro Nishi ,  Youji Shibahara ,  Hisao Sasai

IPC分类号： H04N19/107 ,  H04N19/105 ,  H04N19/124 ,  H04N19/137 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/46 ,  H04N19/52 ,  H04N19/56 ,  H04N19/567 ,  H04N19/573 ,  H04N19/577 ,  H04N19/58 ,  H04N19/61 ,  H04N19/51 ,  H04N19/70

CPC分类号： H04N19/107 ,  H04N19/105 ,  H04N19/124 ,  H04N19/137 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/46 ,  H04N19/52 ,  H04N19/56 ,  H04N19/567 ,  H04N19/573 ,  H04N19/577 ,  H04N19/58 ,  H04N19/61 ,  H04N19/51 ,  H04N19/70

摘要： An image coding method includes: adding, to a candidate list, a first adjacent motion vector as a candidate for a predicted motion vector to be used for coding the current motion vector; selecting the predicted motion vector from the candidate list; and coding the current motion vector, wherein in the adding, the first adjacent motion vector indicating a position in a first reference picture included in a first reference picture list is added to the candidate list for the current motion vector indicating a position in a second reference picture included in a second reference picture list.

公开(公告)号：US12015800B2

公开(公告)日：2024-06-18

申请号：US17414598

申请日：2019-12-16

申请人： INTERDIGITAL MADISON PATENT HOLDINGS, SAS

发明人： Fabrice Leleannec ,  Franck Galpin ,  Edouard Francois

IPC分类号： H04N19/70 ,  H04N19/105 ,  H04N19/109 ,  H04N19/176 ,  H04N19/52 ,  H04N19/577

CPC分类号： H04N19/70 ,  H04N19/105 ,  H04N19/109 ,  H04N19/176 ,  H04N19/52 ,  H04N19/577

摘要： The general aspects extend motion modes, such as merge with motion vector difference, and symmetrical motion vector difference, to motion models beyond a simple translational model, for example in combination with merge and alternative temporal motion vector prediction modes. Embodiments extend the use of MMVD and SMVD motion vector coding tools to all the motion model derivation methods and temporal prediction methods that are supported in proposed video standards, so as to increase the overall compression performance. Particular embodiments describe combining MMVD or SMVD with the affine motion model, the ATMVP motion model, the planar motion model, the regressive motion field, the triangle-partition-based motion model, the GBI temporal prediction method, the LIC temporal prediction method and the Multi-hypothesis prediction method.