公开(公告)号：US12126839B2

公开(公告)日：2024-10-22

申请号：US17282445

申请日：2019-10-02

申请人： V-NOVA INTERNATIONAL LIMITED

发明人： Simone Ferrara ,  Guido Meardi

IPC分类号： H04N19/117 ,  H04N19/136 ,  H04N19/14 ,  H04N19/60 ,  H04N19/85

CPC分类号： H04N19/85 ,  H04N19/117 ,  H04N19/136 ,  H04N19/14 ,  H04N19/60

摘要： Techniques for encoding a signal are described. A signal is down-sampled to generate a version of the signal. This version of the signal is then encoded to produce a first encoded signal. The first encoded signal is then decoded to produce a first decoded signal. The second decoded signal is up-sampled to obtain a first up-sampled decoded signal. A first residual signal is obtained by taking a difference between the first up-sampled decoded signal and a first reference signal. The first reference signal corresponds to the signal prior to down-sampling. The first residual signal is encoded to produce a first encoded residual signal. The first encoded residual signal and the first encoded signal may be received and decoded by a decoder to reconstruct the signal. The signal may comprise a set of frames of video.

公开(公告)号：US12126802B2

公开(公告)日：2024-10-22

申请号：US17473440

申请日：2021-09-13

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

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

IPC分类号： H04N19/122 ,  H04N19/105 ,  H04N19/119 ,  H04N19/13 ,  H04N19/14 ,  H04N19/157 ,  H04N19/176 ,  H04N19/60 ,  H04N19/70

CPC分类号： H04N19/122 ,  H04N19/105 ,  H04N19/119 ,  H04N19/13 ,  H04N19/14 ,  H04N19/157 ,  H04N19/176 ,  H04N19/60 ,  H04N19/70

摘要： A method for video processing includes applying a sub-block residual coding scheme to a current video block, wherein the residual of the current video block is split into a plurality of sub-blocks each having a size of M*N, determining at least one sub-block with non-zero coefficients based on characteristic associated with each of the plurality of sub-blocks; coding the residue of the current video block based on the derived at least one sub-block with non-zero coefficients.

公开(公告)号：US12120349B2

公开(公告)日：2024-10-15

申请号：US17889580

申请日：2022-08-17

申请人： Panasonic Intellectual Property Corporation of America

发明人： Ryuichi Kanoh ,  Tadamasa Toma ,  Kiyofumi Abe ,  Takahiro Nishi ,  Masato Ohkawa ,  Hideo Saitou

IPC分类号： H04N11/02 ,  H04N19/124 ,  H04N19/176 ,  H04N19/44 ,  H04N19/60

CPC分类号： H04N19/60 ,  H04N19/124 ,  H04N19/176 ,  H04N19/45

摘要： An encoder which transforms a current block to be encoded in an image to encode the current block includes circuitry and memory. The circuitry, using the memory: determines a plurality of first transform basis candidates and transforms the current block using a transform basis included in the plurality of first transform basis candidates determined, when the current block has a first size; and determines one or more second transform basis candidates different from the plurality of first transform basis candidates and transforms the current block using a transform basis included in the one or more second transform basis candidates determined, when the current block has a second size larger than the first size.

公开(公告)号：US20240323440A1

公开(公告)日：2024-09-26

申请号：US18731736

申请日：2024-06-03

申请人： TENCENT AMERICA LLC

发明人： Xin ZHAO ,  Madhu Peringassery KRISHNAN ,  Shan LIU ,  Xiang LI

IPC分类号： H04N19/60 ,  H04N19/105 ,  H04N19/159 ,  H04N19/186

CPC分类号： H04N19/60 ,  H04N19/105 ,  H04N19/159 ,  H04N19/186

摘要： A method for coding video data, executable by a processor, includes receiving video data; entropy-parsing the received video data into one or more components; de-quantizing the one or more entropy-parsed components; performing a joint component secondary transformation (JCST) on the one or more components in accordance with a JCST kernel selected based on one of (i) a prediction mode corresponding to the video data, (ii) a primary transform type of a current block, and (iii) a secondary transform kernel selected for the current block; and decoding the video data based on one or more residual components corresponding to the joint component secondary transformed components.

公开(公告)号：US20240323439A1

公开(公告)日：2024-09-26

申请号：US18653772

申请日：2024-05-02

申请人： LG Electronics Inc.

发明人： Moonmo KOO ,  Jaehyun LIM ,  Seunghwan KIM ,  Mehdi SALEHIFAR

IPC分类号： H04N19/60 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46

CPC分类号： H04N19/60 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46

摘要： Embodiments in the present specification provide a method and device for processing video signal including steps of: obtaining a sub-block transform (SBT) flag indicating whether a SBT is applied, wherein the SBT represents a transform applied to a transform unit corresponding to one of subblocks split from a coding unit; determining a variable value related to a transform target region based on the SBT flag and a size value of the transform unit, wherein if the SBT flag equals to 1 and the size value is greater than a threshold value, the variable value is determined as the threshold value; obtaining position information of a last significant coefficient according to a scan order within the transform unit, wherein the position information of the last significant coefficient is coded based on the variable value; and performing an inverse-transform based on the position information of the last significant coefficient.

公开(公告)号：US20240314365A1

公开(公告)日：2024-09-19

申请号：US18529455

申请日：2023-12-05

申请人： INDUSTRY ACADEMY COOPERATION FOUNDATION OF SEJONG UNIVERSITY

发明人： Joo Hee MOON ,  Jae Min HA ,  Dong Jae WON ,  Sung Won LIM

IPC分类号： H04N19/91 ,  H04N19/132 ,  H04N19/176 ,  H04N19/60

CPC分类号： H04N19/91 ,  H04N19/132 ,  H04N19/176 ,  H04N19/60

摘要： The present invention relates to an image encoding/decoding method and device, and the image encoding method or device according to an embodiment of the present invention may encode a position of a reference coefficient within a current transform block to be encoded, and encoding skip region information of a skip region selected on the basis of the position of the reference coefficient. The skip region information may represent whether or not coefficients within the skip region have an identical coefficient value.

公开(公告)号：US20240314360A1

公开(公告)日：2024-09-19

申请号：US18674486

申请日：2024-05-24

申请人： TENCENT AMERICA LLC

发明人： Madhu Peringassery KRISHNAN ,  Xin ZHAO ,  Shan LIU

IPC分类号： H04N19/60 ,  G06F17/16

CPC分类号： H04N19/60 ,  G06F17/16

摘要： A method, computer program, and computer system is provided for coding video data. Video data is received. One or more transform cores corresponding to a transform associated with the video data are identified. The one or more transform cores include one or more of a line graph transform (LGT) and a discrete sine transform (DST) The video data is decoded based on the identified transform core. The transform cores correspond to one or more from among an 8-bit transform core and a 10-bit transform core. The transform corresponds to one or more from among a 2-point transform, a 4-point transform, an 8-point transform, and a 16-point transform.

公开(公告)号：US20240305805A1

公开(公告)日：2024-09-12

申请号：US18666752

申请日：2024-05-16

申请人： Tencent America LLC

发明人： Liang ZHAO ,  Xin Zhao ,  Madhu Peringassery Krishanan ,  Shan Liu

IPC分类号： H04N19/44 ,  H04N19/119 ,  H04N19/132 ,  H04N19/176 ,  H04N19/60

CPC分类号： H04N19/44 ,  H04N19/119 ,  H04N19/132 ,  H04N19/176 ,  H04N19/60

摘要： In a method for video decoding in a decoder, transform coefficients associated with a coding block that is an L-shaped partition of a picture are decoded, by a processor and from a coded video bitstream. The L-shaped partition of the picture is partitioned into a plurality of rectangular sub-blocks when the coding block is the L-shaped partition, each corner of the L-shaped partition being a right angle. Residuals of each of the plurality of rectangular sub-blocks in the coding block are determined, by the processor, based on the transform coefficients of the respective rectangular sub-block. Samples of the coding block are reconstructed, by the processor, based on the residuals of the coding block.

公开(公告)号：US12088856B2

公开(公告)日：2024-09-10

申请号：US18141345

申请日：2023-04-28

申请人： Imagination Technologies Limited

发明人： Simon Fenney

IPC分类号： H04N19/94 ,  H03M7/30 ,  H04N19/124 ,  H04N19/167 ,  H04N19/186 ,  H04N19/196 ,  H04N19/426 ,  H04N19/46 ,  H04N19/60

CPC分类号： H04N19/94 ,  H03M7/30 ,  H03M7/3068 ,  H03M7/3082 ,  H04N19/124 ,  H04N19/167 ,  H04N19/186 ,  H04N19/196 ,  H04N19/426 ,  H04N19/46 ,  H04N19/60

摘要： A method of compressing image data comprising a set of image values each representing a position in image-value space so as to define an occupied region thereof. The method comprises selectively applying a series of compression transforms to subsets of the image data items to generate a transformed set of image data items occupying a compacted region of value space. The method further comprises identifying a set of one or more reference data items that quantizes the compacted region in value space. For each image data item in the set of image data items, a sequence of decompression transforms from a fixed set of decompression transforms is identified that generates an approximation of that image data item when applied to a selected one of the one or more reference data items. Each image data item in the set of image data items is encoded as a representation of the identified sequence of decompression transforms for that image data item. The encoded image data items, set of reference data items and the fixed set of decompression transforms are stored as compressed image data.

公开(公告)号：US12088806B2

公开(公告)日：2024-09-10

申请号：US17629651

申请日：2020-08-20

申请人： LG Electronics Inc.

发明人： Jie Zhao ,  Seunghwan Kim ,  Seethal Paluri

IPC分类号： H04N19/124 ,  H04N19/132 ,  H04N19/169 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/60 ,  H04N19/70

CPC分类号： H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/1883 ,  H04N19/60 ,  H04N19/70

摘要： An image decoding method performed by a decoding device according to the present document comprises the steps of: obtaining CU chroma QP offset-related information for a current chroma block on the basis of the size and tree type of the current chroma block; deriving a chroma QP for the current chroma block on the basis of the CU chroma QP offset-related information; deriving residual samples for the current chroma block on the basis of the chroma QP; and generating a reconstructed picture on the basis of the residual samples, wherein the CU chroma QP offset-related information includes a CU chroma QP offset flag and a CU chroma QP offset index for the current chroma block.