公开(公告)号：US12120352B2

公开(公告)日：2024-10-15

申请号：US17208100

申请日：2021-03-22

申请人： LG ELECTRONICS INC.

发明人： Jung Sun Kim ,  Seung Wook Park ,  Young Hee Choi ,  Jaewon Sung ,  Byeong Moon Jeon ,  Joon Young Park

IPC分类号： H04N19/625 ,  H04N19/119 ,  H04N19/122 ,  H04N19/129 ,  H04N19/149 ,  H04N19/176 ,  H04N19/18 ,  H04N19/61

CPC分类号： H04N19/61 ,  H04N19/119 ,  H04N19/122 ,  H04N19/129 ,  H04N19/149 ,  H04N19/176 ,  H04N19/18 ,  H04N19/625

摘要： The present invention relates to a method for decoding a video signal, comprising the steps of: acquiring a transform size flag of the current macroblock from a video signal; checking the number of non-zero transform coefficients at each pixel position in a first transform block which corresponds to the transform size flag; changing a scan order of the first transform block by prioritizing the position of the pixel having the greatest number of the non-zero transform coefficients in the first transform block; determining the number of the non-zero transform coefficients at each pixel position in a second transform block, and setting the changed scan order of the first transform block as an initialized scan order of the second transform block; adding the number of the non-zero transform coefficients at each pixel position in the first transform block and the number of the non-zero transform coefficients at each pixel position in the second transform block, and changing the scan order of the second transform block by prioritizing the position of the pixel having the greatest number of the non-zero transform coefficients; and decoding the transform coefficients arranged in the scan order changed in the previous step, wherein the first transform block and the second transform block have sizes corresponding to the transform size flag, and are contained in the current macroblock.

公开(公告)号：US20240305783A1

公开(公告)日：2024-09-12

申请号：US18667917

申请日：2024-05-17

申请人： DOLBY LABORATORIES LICENSING CORPORATION

发明人： Athanasios Leontaris ,  Alexandros Tourapis

IPC分类号： H04N19/124 ,  H04N19/126 ,  H04N19/137 ,  H04N19/14 ,  H04N19/142 ,  H04N19/149 ,  H04N19/15 ,  H04N19/152 ,  H04N19/154 ,  H04N19/159 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/194 ,  H04N19/61 ,  H04N19/615 ,  H04N19/80

CPC分类号： H04N19/124 ,  H04N19/137 ,  H04N19/14 ,  H04N19/142 ,  H04N19/15 ,  H04N19/154 ,  H04N19/159 ,  H04N19/194 ,  H04N19/615 ,  H04N19/80 ,  H04N19/126 ,  H04N19/149 ,  H04N19/152 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/61

摘要： Embodiments feature families of rate allocation and rate control methods that utilize advanced processing of past and future frame/field picture statistics and are designed to operate with one or more coding passes. At least two method families include: a family of methods for a rate allocation with picture look-ahead; and a family of methods for average bit rate (ABR) control methods. At least two other methods for each method family are described. For the first family of methods, some methods may involve intra rate control. For the second family of methods, some methods may involve high complexity ABR control and/or low complexity ABR control. These and other embodiments can involve any of the following: spatial coding parameter adaptation, coding prediction, complexity processing, complexity estimation, complexity filtering, bit rate considerations, quality considerations, coding parameter allocation, and/or hierarchical prediction structures, among others.

公开(公告)号：US12088811B2

公开(公告)日：2024-09-10

申请号：US17093671

申请日：2020-11-10

申请人： Texas Instruments Incorporated

发明人： Naveen Srinivasamurthy ,  Soyeb Nagori ,  Manoj Koul

IPC分类号： H04N19/132 ,  H04N19/126 ,  H04N19/152 ,  H04N19/157 ,  H04N19/172 ,  H04N19/124 ,  H04N19/149

CPC分类号： H04N19/132 ,  H04N19/126 ,  H04N19/152 ,  H04N19/157 ,  H04N19/172 ,  H04N19/124 ,  H04N19/149

摘要： Several methods and systems for encoding pictures associated with video data are disclosed. In an embodiment, a method includes determining by a processing module, whether a picture is to be encoded based on at least one of a skip assessment associated with the picture and an encoding status of a pre-selected number of pictures preceding the picture in an encoding sequence. The method further includes encoding by the processing module, a plurality of rows of video data associated with the picture upon determining that the picture is to be encoded, wherein the plurality of rows are encoded based on a pre-selected maximum encoded picture size.

公开(公告)号：US20240244227A1

公开(公告)日：2024-07-18

申请号：US18096424

申请日：2023-01-12

申请人： Mellanox Technologies, Ltd.

发明人： Eshed Ram ,  Dotan David Levi ,  Assaf Hallak ,  Shie Mannor ,  Gal Chechik ,  Eyal Frishman ,  Ohad Markus ,  Dror Porat ,  Assaf Weissman

IPC分类号： H04N19/149 ,  H04N19/154 ,  H04N19/172

CPC分类号： H04N19/149 ,  H04N19/154 ,  H04N19/172

摘要： A system includes a processing device to receive a video content, a quality metric, and a target bit rate for encoding the video content. The system includes encoding hardware to perform frame encoding on the video content and a controller coupled between the processing device and the encoding hardware. The controller is programmed with machine instructions to generate first QP values on a per-frame basis using a frame machine learning model with a first plurality of weights. The first plurality of weights depends at least in part on the quality metric and the target bit rate. The controller is further programmed to provide the first QP values to the encoding hardware for rate control of the frame encoding.

公开(公告)号：US20240195981A1

公开(公告)日：2024-06-13

申请号：US18544589

申请日：2023-12-19

申请人： SZ DJI TECHNOLOGY CO., LTD.

发明人： Siwei MA ,  Jiaqi ZHANG ,  Xiaozhen ZHENG ,  Shanshe WANG

IPC分类号： H04N19/149 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

CPC分类号： H04N19/149 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

摘要： An encoding method includes binarizing a chrominance prediction mode of an image block of an image that is permitted to use a CCLM and/or regular intra-frame chrominance prediction mode to obtain a bit string including adjacent bits. The CCLM includes first, second, and third modes, a second mode, and a third mode, the regular intra-frame chrominance prediction mode being other intra-frame chrominance prediction modes except CCLM. A first bit of the adjacent bits indicates whether CCLM is used according to whether a value there of is 1. A second bit indicates whether to use the first mode when the first bit indicates to use CCLM. A third bit indicates whether the second or third mode is used when the second bit indicates the first mode is not used. The method further includes using mutually independent probability models to respectively encode the first bit and the second bit.

公开(公告)号：US20240155253A1

公开(公告)日：2024-05-09

申请号：US18414266

申请日：2024-01-16

申请人： NVIDIA Corporation

发明人： Animesh Khemka ,  Sean Midthun Pieper

IPC分类号： H04N23/84 ,  H04N19/149

CPC分类号： H04N23/843 ,  H04N19/149

摘要： A method of compression includes compressing a captured image from a first bit-depth at which it was captured to a second bit-depth that is less than the first bit-depth. The compression comprises applying, according to a power curve, a first compression amount to a first region of the captured image having a first pixel value; and applying, according to the power curve, a second compression amount to a second part of the captured image having a higher second pixel value, wherein the first compression amount is lower than the second compression amount.

公开(公告)号：US11902560B2

公开(公告)日：2024-02-13

申请号：US17051825

申请日：2019-05-07

申请人： InterDigital VC Holdings, Inc.

发明人： Ya Chen ,  Franck Galpin ,  Tangi Poirier

IPC分类号： H04N19/513 ,  H04N19/132 ,  H04N19/149 ,  H04N19/176 ,  H04N19/46

CPC分类号： H04N19/513 ,  H04N19/132 ,  H04N19/149 ,  H04N19/176 ,  H04N19/46

摘要： A video codec can involve processing video information based on a motion model involving a coding unit including a plurality of sub-blocks, such as an affine motion model, to produce motion compensation information, obtaining a local illumination compensation model, and encoding or decoding the video information based on the motion compensation information and the local illumination compensation model.

公开(公告)号：US11900640B2

公开(公告)日：2024-02-13

申请号：US17236108

申请日：2021-04-21

申请人： TENCENT AMERICA LLC

发明人： Wei Jiang ,  Wei Wang ,  Shan Liu

IPC分类号： H04N19/172 ,  G06T9/00 ,  G06T3/40 ,  H04N19/137 ,  G06N3/08 ,  H04N19/149 ,  G06N3/045

CPC分类号： G06T9/002 ,  G06N3/045 ,  G06N3/08 ,  G06T3/4046 ,  H04N19/137 ,  H04N19/149 ,  H04N19/172

摘要： A method of substitutional neural residual compression is performed by at least one processor and includes estimating motion vectors, based on a current image frame and a previous reconstructed image frame, obtaining a predicted image frame, based on the estimated motion vectors and the previous reconstructed image frame, and subtracting the obtained predicted image frame from the current image frame to obtain a substitutional residual. The method further includes encoding the obtained substitutional residual, using a first neural network, to obtain an encoded representation, and compressing the encoded representation.

公开(公告)号：US11863798B2

公开(公告)日：2024-01-02

申请号：US16308208

申请日：2017-07-10

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  INDUSTRY ACADEMY COOPERATION FOUNDATION OF SEJONG UNIVERSITY

发明人： Sung Chang Lim ,  Jung Won Kang ,  Hyun Suk Ko ,  Jin Ho Lee ,  Dong San Jun ,  Ha Hyun Lee ,  Seung Hyun Cho ,  Hui Yong Kim ,  Jin Soo Choi ,  Yung Lyul Lee ,  Jun Woo Choi

IPC分类号： H04N19/91 ,  H04N19/149 ,  H04N19/159 ,  H04N19/176 ,  H04N19/44 ,  H04N19/182 ,  H04N19/146

CPC分类号： H04N19/91 ,  H04N19/146 ,  H04N19/149 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/44

摘要： The present invention relates to an image encoding/decoding method and apparatus. An image encoding method according to the present invention may comprise generating a transform block by performing at least one of transform and quantization; grouping at least one coefficient included in the transform block into at least one coefficient group (CG); scanning at least one coefficient included in the coefficient group; and encoding the at least one coefficient.

公开(公告)号：US20230336739A1

公开(公告)日：2023-10-19

申请号：US18030182

申请日：2021-11-03

申请人： DeepMind Technologies Limited

发明人： Chenjie Gu ,  Hongzi Mao ,  Ching-Han Chiang ,  Cheng Chen ,  Jingning Han ,  Ching Yin Derek Pang ,  Rene Andre Claus ,  Marisabel Guevara Hechtman ,  Daniel James Visentin ,  Christopher Sigurd Fougner ,  Charles Booth Schaff ,  Nishant Patil ,  Alejandro Ramirez Bellido

IPC分类号： H04N19/149 ,  H04N19/126 ,  H04N19/172

CPC分类号： H04N19/149 ,  H04N19/126 ,  H04N19/172

摘要： Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for encoding video comprising a sequence of video frames. In one aspect, a method comprises for one or more of the video frames: obtaining a feature embedding for the video frame; processing the feature embedding using a rate control machine learning model to generate a respective score for each of multiple quantization parameter values; selecting a quantization parameter value using the scores; determining a cumulative amount of data required to represent: (i) an encoded representation of the video frame and (ii) encoded representations of each preceding video frame; determining, based on the cumulative amount of data, that a feedback control criterion for the video frame is satisfied; updating the selected quantization parameter value; and processing the video frame using an encoding model to generate the encoded representation of the video frame.