公开(公告)号：US20240357082A1

公开(公告)日：2024-10-24

申请号：US18684790

申请日：2022-08-18

申请人： MediaTek Singapore Pte. Ltd.

发明人： Olena CHUBACH ,  Chun-Chia CHEN ,  Man-Shu CHIANG ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Chih-Wei HSU ,  Yu-Wen HUANG

IPC分类号： H04N19/105 ,  H04N19/119 ,  H04N19/146 ,  H04N19/176 ,  H04N19/196 ,  H04N19/513

CPC分类号： H04N19/105 ,  H04N19/119 ,  H04N19/146 ,  H04N19/176 ,  H04N19/196 ,  H04N19/521

摘要： A video coding system that uses template matching (TM) to improve signaling of coding modes is provided. The system receives data to be encoded or decoded as a current block of a current picture of a video. The system identifies a set of pixels neighboring the current block as a current template. The system identifies a reference template of each candidate coding mode in a plurality of candidate coding modes. The system computes a template matching (TM) cost for each candidate coding mode based on matching the current template with the reference template of the candidate coding mode. The system selects a candidate coding mode from the plurality of candidate coding modes based on the computed TM costs. The system reconstructs the current block or encoding the current block into a bitstream by using selected candidate coding mode.

公开(公告)号：US12108029B2

公开(公告)日：2024-10-01

申请号：US17133324

申请日：2020-12-23

申请人： Intel Corporation

发明人： Sri Ranjan Srikantam ,  Prasanna Kumar Mandapadi Ramasubramanian ,  Changliang Wang ,  Kseniya Tikhomirova ,  Sergey Solodkov

IPC分类号： H04N19/105 ,  H04N19/146 ,  H04N19/159 ,  H04N19/172 ,  H04N19/30

CPC分类号： H04N19/105 ,  H04N19/146 ,  H04N19/159 ,  H04N19/172 ,  H04N19/30

摘要： Techniques related to video coding include efficient frame loss recovery using a feedback channel acknowledgement to decode base layer frames.

公开(公告)号：US20240323422A1

公开(公告)日：2024-09-26

申请号：US18680800

申请日：2024-05-31

申请人： Intel Corporation

发明人： Jill Boyce ,  Lidong Xu

IPC分类号： H04N19/46 ,  H04N19/136 ,  H04N19/146 ,  H04N19/167 ,  H04N19/172 ,  H04N19/42

CPC分类号： H04N19/46 ,  H04N19/136 ,  H04N19/146 ,  H04N19/167 ,  H04N19/172 ,  H04N19/42

摘要： Disclosed examples populate a supplemental enhancement information (SEI) message with a value corresponding to a number of subpictures of a video sequence; populate a level indicator in the SEI message; populate a subpicture identifier; populate the subpicture identifier in a slice header, and cause the SEI message and the slice header to be included in a video bitstream.

公开(公告)号：US20240323396A1

公开(公告)日：2024-09-26

申请号：US18680597

申请日：2024-05-31

申请人： CANON KABUSHIKI KAISHA

发明人： Christopher James Rosewarne

IPC分类号： H04N19/146 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

CPC分类号： H04N19/146 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

摘要： A system and method of decoding a transform block for a colour channel of an image frame from a video bitstream. The method comprises determining a chroma format of the image frame, the chroma format having chroma channels of the image frame being subsampled relative to a luma channel of the image frame; determining a coefficient group size of the transform block, the coefficient group size being a largest area of the transform block of up to 16 samples, the coefficient group size being determined based only on the transform block size and independent of both (i) a colour plane of the transform block and (ii) colour plane subsampling due to the determined chroma format; and decoding the transform block using coefficient groups of the determined size from the video bitstream

公开(公告)号：US20240305799A1

公开(公告)日：2024-09-12

申请号：US18665970

申请日：2024-05-16

申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

发明人： Robert SKUPIN ,  Yago SÁNCHEZ DE LA FUENTE ,  Thomas SCHIERL ,  Cornelius HELLGE ,  Karsten GRUENEBERG ,  Thomas WIEGAND

IPC分类号： H04N19/33 ,  H04N19/119 ,  H04N19/132 ,  H04N19/146 ,  H04N19/167 ,  H04N19/174 ,  H04N19/34 ,  H04N19/46 ,  H04N19/70 ,  H04N19/88

CPC分类号： H04N19/33 ,  H04N19/119 ,  H04N19/132 ,  H04N19/146 ,  H04N19/167 ,  H04N19/174 ,  H04N19/34 ,  H04N19/46 ,  H04N19/70 ,  H04N19/88

摘要： A video data stream is rendered reducible in a manner so that the reduction leads to a restriction of pictures of the reduced video data stream to merely a predetermined subarea of the pictures of the original video data stream and in a manner so that transcoding, such as re-quantization, may be avoided and a conformance of the reduced video data stream relative to the codec underlying the original video data stream be maintained. This is achieved by providing the video data stream with information including an indication of the predetermined subarea and replacement indices for redirecting the indices included by the payload portion so as to refer to, and/or replacement parameters for adjusting the first set of coding parameter settings so as to result in, a second set of coding parameter settings.

公开(公告)号：US20240305788A1

公开(公告)日：2024-09-12

申请号：US18295184

申请日：2023-04-03

申请人： Beijing Hulu Software Technology Development Co., Ltd.

发明人： Chen Liu ,  Wenhao Zhang ,  Xuchang Huangfu ,  Xiaobo Liu ,  Xuewei Meng

IPC分类号： H04N19/146 ,  H04N19/11 ,  H04N19/172 ,  H04N19/59

CPC分类号： H04N19/146 ,  H04N19/11 ,  H04N19/172 ,  H04N19/59

摘要： In some embodiments, a method determines feature values for a portion of a video and a target configuration. The target configuration is associated with a parameter of an encoder and includes a set of bitrates and a resolution. A plurality of quality values is generated for the set of bitrates and the resolution based on the feature values. The method generates a representation of a relationship between bitrate and the plurality of quality values for the resolution. The representation is analyzed to determine a list of bitrates for the portion of the video. The method outputs he list of bitrates for use encoding the portion of the video using the resolution.

公开(公告)号：US20240305762A1

公开(公告)日：2024-09-12

申请号：US18181531

申请日：2023-03-09

申请人： QUALCOMM Incorporated

发明人： Peer Berger ,  Shay Landis

IPC分类号： H04N13/161 ,  H04N13/194 ,  H04N19/146 ,  H04N19/91

CPC分类号： H04N13/161 ,  H04N13/194 ,  H04N19/146 ,  H04N19/91

摘要： Methods, systems, and devices for wireless communications are described. A wireless device may receive, from a first source device, a first quantity of frames that may be compressed in accordance with a first compression scheme and may receive, from a second source device, a second quantity of frames that may be compressed in accordance with the first compression scheme. The wireless device may transmit, to at least the first source device, a compression level report that indicates a second compression scheme for compression of additional quantities of frames from the first source device, where the second compression scheme may be associated with reduced processing with respect to processing associated with the first compression scheme, where the reduced processing may be based on a correlation between the first content of the first quantity of frames and the second content of the second quantity of frames.

公开(公告)号：US12088822B2

公开(公告)日：2024-09-10

申请号：US17435952

申请日：2020-01-20

申请人： CANON KABUSHIKI KAISHA

发明人： Christopher James Rosewarne

IPC分类号： H04N19/146 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

CPC分类号： H04N19/146 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186

摘要： A system and method of decoding a transform block for a colour channel of an image frame from a video bitstream. The method comprises determining a chroma format of the image frame, the chroma format having chroma channels of the image frame being subsampled relative to a luma channel of the image frame; determining a coefficient group size of the transform block, the coefficient group size being a largest area of the transform block of up to 16 samples, the coefficient group size being determined based only on the transform block size and independent of both (i) a colour plane of the transform block and (ii) colour plane subsampling due to the determined chroma format; and decoding the transform block using coefficient groups of the determined size from the video bitstream.

公开(公告)号：US12081769B2

公开(公告)日：2024-09-03

申请号：US17933057

申请日：2022-09-16

申请人： Apple Inc.

发明人： Hao Pan ,  Jim C. Chou ,  Felix C. Fernandes

IPC分类号： H04N19/146 ,  H04L65/70 ,  H04L65/75 ,  H04N19/14 ,  H04N19/169 ,  H04N19/176 ,  H04N19/63

CPC分类号： H04N19/146 ,  H04L65/70 ,  H04L65/75 ,  H04N19/14 ,  H04N19/176 ,  H04N19/188 ,  H04N19/63

摘要： A video encoding system in which pixel data is decomposed into frequency bands prior to encoding. The frequency bands for a slice of a frame may be buffered so that complexity statistics may be calculated across the frequency bands prior to encoding. The statistics may then be used by a rate control component in determining quantization parameters for the frequency bands for modulating the rate in the encoder for the current slice. The quantization parameters for the frequency bands may be calculated jointly to optimize the quality of the displayed frames after decoder reconstruction and wavelet synthesis on a receiving device. Information about one or more previously processed frames may be used in combination with the statistics for a current slice in determining the quantization parameters for the current slice.

公开(公告)号：US20240267530A1

公开(公告)日：2024-08-08

申请号：US18566803

申请日：2022-06-01

申请人： Dolby Laboratories Licensing Corporation

发明人： Guan-Ming Su

IPC分类号： H04N19/146 ,  H04N19/105 ,  H04N19/186

CPC分类号： H04N19/146 ,  H04N19/105 ,  H04N19/186

摘要： An input image to a pipeline of chained reshaping functions is received. Reference images are generated from the input image. The input image and the reference images are used to determine operational parameters for chained reshaping functions in the pipeline of chained reshaping functions. A reshaped image generated from one or more of the chained reshaping functions is encoded in a video signal along with image metadata. The image metadata includes some or all of the operational parameters specifying the chained reshaping functions. A recipient device of the video signal is caused to use the image metadata and the reshaped image to generate a reconstructed image.