公开(公告)号：US12041234B2

公开(公告)日：2024-07-16

申请号：US17557996

申请日：2021-12-21

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：US11985354B2

公开(公告)日：2024-05-14

申请号：US17676966

申请日：2022-02-22

申请人： HUAWEI TECHNOLOGIES CO., LTD.

发明人： Timofey Mikhailovich Solovyev ,  Maxim Borisovitch Sychev ,  Huanbang Chen ,  Alexander Alexandrovich Karabutov ,  Roman Igorevich Chernyak ,  Sergey Yurievich Ikonin ,  Haitao Yang ,  Elena Alexandrovna Alshina

IPC分类号： H04N19/82 ,  H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/615 ,  H04N19/80

CPC分类号： H04N19/615 ,  H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/172 ,  H04N19/176 ,  H04N19/80

摘要： A method for coding a video implemented in an encoder or a decoder, comprising: determining control point motion vectors, CPMVs, for a block according to affine inter-prediction, according to a preselected affine motion model, the block being an affine block; performing motion compensation for the block using a pixel-based motion vector field according to values of the CPMVs, upon fulfilling at least one of the following conditions: A) for a predefined size of a sub-block of M×M, during processing of one line, respectively, of the sub-block the number of lines of the reference picture is less than N, where N is an integer and N is larger than 2.

公开(公告)号：US11778234B2

公开(公告)日：2023-10-03

申请号：US17934934

申请日：2022-09-23

申请人： QUALCOMM Incorporated

发明人： Amir Said ,  Xin Zhao ,  Wei-Jung Chien ,  Jianle Chen ,  Marta Karczewicz

IPC分类号： H04N19/61 ,  H04N19/117 ,  H04N19/82 ,  H04N19/593 ,  H04N19/10 ,  H04N19/192 ,  H04N19/436 ,  H04N19/615 ,  H04N19/70 ,  H04N19/80 ,  H04N19/91 ,  H04N19/86

CPC分类号： H04N19/61 ,  H04N19/10 ,  H04N19/117 ,  H04N19/192 ,  H04N19/436 ,  H04N19/593 ,  H04N19/615 ,  H04N19/70 ,  H04N19/80 ,  H04N19/82 ,  H04N19/91 ,  H04N19/86

摘要： An example method of decoding video data includes obtaining, from a coded video bitstream and for a current block of the video data, an indication of an intra-prediction mode that identifies an initial predictive block; filtering, in parallel, samples in a current line of a plurality of lines of the initial predictive block based on filtered values of samples in a preceding line of the plurality of lines and unfiltered values of samples in the current line to generate filtered values for samples for the current line; and reconstructing, using intra prediction, values of samples of the current block based on the filtered values of the samples of the current initial predictive block and residual data for the current block that represents a difference between the filtered values of the samples of the current initial predictive block and the values of samples of the current block.

公开(公告)号：US20230276058A1

公开(公告)日：2023-08-31

申请号：US18311330

申请日：2023-05-03

申请人： Electronics and Telecommunications Research Institute ,  Kwangwoon University Industry-Academic Collaboration Foundation ,  University-Industry Cooperation Group of Kyung Hee University

发明人： Hae Chul CHOI ,  Se Yoon JEONG ,  Sung-Chang LIM ,  Jin Soo CHOI ,  Jin Woo HONG ,  Dong Gyu SIM ,  Seoung-Jun OH ,  Chang-Beom AHN ,  Gwang Hoon PARK ,  Seung Ryong KOOK ,  Sea-Nae PARK ,  Kwang-Su JEONG

IPC分类号： H04N19/159 ,  H04N19/132 ,  H04N19/587 ,  H04N19/593 ,  H04N19/61 ,  H04N19/70 ,  H04N19/11 ,  H04N19/124 ,  H04N19/44 ,  H04N19/50 ,  H04N19/625 ,  H04N19/91 ,  H04N19/147 ,  H04N19/176 ,  H04N19/182 ,  H04N19/51 ,  H04N19/615 ,  H04N19/105 ,  H04N19/117 ,  H04N19/43

CPC分类号： H04N19/159 ,  H04N19/132 ,  H04N19/587 ,  H04N19/593 ,  H04N19/61 ,  H04N19/70 ,  H04N19/11 ,  H04N19/124 ,  H04N19/44 ,  H04N19/50 ,  H04N19/625 ,  H04N19/91 ,  H04N19/147 ,  H04N19/176 ,  H04N19/182 ,  H04N19/51 ,  H04N19/615 ,  H04N19/105 ,  H04N19/117 ,  H04N19/43 ,  H04N19/172

摘要： The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit.

公开(公告)号：US20230164358A1

公开(公告)日：2023-05-25

申请号：US17892933

申请日：2022-08-22

申请人： MediaTek Inc.

发明人： Chih-Yao Chiu ,  Chun-Chia Chen ,  Chih-Wei Hsu ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC分类号： H04N19/615 ,  H04N19/177 ,  H04N19/182 ,  H04N19/109 ,  H04N19/137 ,  H04N19/176 ,  H04N19/119 ,  H04N19/117 ,  H04N19/105 ,  H04N19/167 ,  H04N19/172

CPC分类号： H04N19/615 ,  H04N19/177 ,  H04N19/182 ,  H04N19/109 ,  H04N19/137 ,  H04N19/176 ,  H04N19/119 ,  H04N19/117 ,  H04N19/105 ,  H04N19/167 ,  H04N19/172

摘要： Various schemes pertaining to pre-encoding processing of a video stream with motion compensated temporal filtering (MCTF) are described. An apparatus determines a filtering interval for a received raw video stream having pictures in a temporal sequence. The apparatus selects from the pictures a plurality of target pictures based on the filtering interval, as well as a group of reference pictures for each target picture to perform pixel-based MCTF, which generates a corresponding filtered picture for each target picture. The apparatus subsequently transmits the filtered pictures as well as non-target pictures to an encoder for encoding the video stream. Subpictures of natural images and screen content images are separately processed by the apparatus.

公开(公告)号：US11575921B2

公开(公告)日：2023-02-07

申请号：US16861540

申请日：2020-04-29

申请人： GE Video Compression, LLC

发明人： Tobias Hinz ,  Haricharan Lakshman ,  Jan Stegemann ,  Philipp Helle ,  Mischa Siekmann ,  Karsten Suehring ,  Detlev Marpe ,  Heiko Schwarz ,  Christian Bartnik ,  Ali Atef Ibrahim Khairat Abdelhamid ,  Heiner Kirchhoffer ,  Thomas Wiegand

IPC分类号： H04N19/44 ,  H04N19/33 ,  H04N19/105 ,  H04N19/117 ,  H04N19/157 ,  H04N19/187 ,  H04N19/82 ,  H04N19/136 ,  H04N19/159 ,  H04N19/34 ,  H04N19/119 ,  H04N19/587 ,  H04N19/59 ,  H04N19/18 ,  H04N19/48 ,  H04N19/61 ,  H04N19/70 ,  H04N19/86 ,  H04N19/107 ,  H04N19/137 ,  H04N19/176 ,  H04N19/196 ,  H04N19/503 ,  H04N19/593 ,  H04N19/615 ,  H04N19/11 ,  H04N19/463

摘要： The coding efficiency of scalable video coding is increased by substituting missing spatial intra prediction parameter candidates in a spatial neighborhood of a current block of the enhancement layer by use of intra prediction parameters of a co-located block of the base layer signal. By this measure, the coding efficiency for coding the spatial intra prediction parameters is increased due to the improved prediction quality of the set of intra prediction parameters of the enhancement layer, or, more precisely stated, the increased likelihood, that appropriate predictors for the intra prediction parameters for an intra predicted block of the enhancement layer are available thereby increasing the likelihood that the signaling of the intra prediction parameter of the respective enhancement layer block may be performed, on average, with less bits.

公开(公告)号：US20220400271A1

公开(公告)日：2022-12-15

申请号：US17847673

申请日：2022-06-23

申请人： GE Video Compression, LLC

发明人： Tobias HINZ ,  Haricharan LAKSHMAN ,  Jan STEGEMANN ,  Philipp HELLE ,  Mischa SIEKMANN ,  Karsten SUEHRING ,  Detlev MARPE ,  Heiko SCHWARZ ,  Christian BARTNIK ,  Ali Atef Ibrahim KHAIRAT ABDELHAMID ,  Heiner KIRCHHOFFER ,  Thomas WIEGAND

IPC分类号： H04N19/33 ,  H04N19/105 ,  H04N19/117 ,  H04N19/157 ,  H04N19/187 ,  H04N19/82 ,  H04N19/136 ,  H04N19/159 ,  H04N19/34 ,  H04N19/119 ,  H04N19/587 ,  H04N19/59 ,  H04N19/18 ,  H04N19/48 ,  H04N19/61 ,  H04N19/70 ,  H04N19/86 ,  H04N19/107 ,  H04N19/137 ,  H04N19/176 ,  H04N19/196 ,  H04N19/503 ,  H04N19/593 ,  H04N19/615

摘要： Scalable video coding is rendered more efficient by deriving/selecting a subblock subdivision to be used for enhancement layer prediction, among a set of possible subblock subdivisions of an enhancement layer block by evaluating the spatial variation of the base layer coding parameters over the base layer signal. By this measure, less of the signalization overhead has to be spent on signaling this subblock subdivision within the enhancement layer data stream, if any. The subblock subdivision thus selected may be used in predictively coding/decoding the enhancement layer signal.

公开(公告)号：US20220279175A1

公开(公告)日：2022-09-01

申请号：US17747309

申请日：2022-05-18

申请人： Intellectual Discovery Co., Ltd.

发明人： Dong Gyu SIM ,  Ho Chan RYU ,  Yong Jo AHN

IPC分类号： H04N19/11 ,  H04N19/176 ,  H04N19/107 ,  H04N19/124 ,  H04N19/91 ,  H04N19/593 ,  H04N19/105 ,  H04N19/117 ,  H04N19/615 ,  H04N19/13 ,  H04N19/635 ,  H04N19/513 ,  H04N19/82

摘要： A device for encoding/decoding the image according to the present invention includes an intra prediction module configured to: determine an intra prediction mode of a current block; determine a scanning order of multiple sub blocks in the current block on the basis of the determined intra prediction mode; and perform intra prediction of the current block on the basis of the determined scanning order.

公开(公告)号：US20220174327A1

公开(公告)日：2022-06-02

申请号：US17677362

申请日：2022-02-22

申请人： ARRIS Enterprises LLC

发明人： Wayne D. Michelsen ,  Swaroop Chanda ,  Wei Zhou ,  Jane Perera

IPC分类号： H04N19/87 ,  H04N19/194 ,  H04N19/615 ,  H04N19/172 ,  H04N19/107 ,  H04N19/142 ,  H04N19/146 ,  H04N19/51

摘要： A method is provided to better detect a scene change to provide a prediction to an encoder to enable more efficient encoding. The method uses a Motion Compensated Temporal Filter (MCTF) that provides motion estimation and is located prior to an encoder. The MCTF provides a Motion Compensated Residual (MCR) used to detect the scene change transition. When a scene is relatively stable, the MCR score is also relatively stable. However, when a scene transition is in process, the MCR score behavior changes, Algorithmically, the MCR score is used by comparing the sliding mean of the MCR score to the sliding median. This comparison highlights the transition points. In the case of a scene cut, the MCR score exhibits a distinct spike. In the case of a fade or dissolve, the MCR score exhibits a transitional period of degradation followed by recovery. By implementing the above detection using the MCR, the location of the I-pictures in the downstream encoding process can be accurately determined for the encoder.

公开(公告)号：US10735769B2

公开(公告)日：2020-08-04

申请号：US16141419

申请日：2018-09-25

申请人： Intel Corporation

发明人： Noam Levy ,  Liron Lvov ,  Noam Elron ,  Oskar Pelc ,  Shahar S. Yuval

IPC分类号： H04N19/615 ,  H04N19/513 ,  H04N19/176 ,  H04N19/137 ,  H04N19/105 ,  H04N19/30 ,  H04N19/587 ,  H04N19/85

摘要： Techniques related to temporal noise reduction in captured video are discussed. Such techniques include performing motion estimation on a portion of a downsampled current frame performed during the downsampling of the current frame, replacing one or more of the resultant motion vectors based on confidence scores of the resultant motion vector, and blending the current frame and a temporally previous frame to generate a temporally filtered current frame. The temporally filtered current frame may be displayed to a user and/or encoded to generate a bitstream.