公开(公告)号：EP3732879B1

公开(公告)日：2024-10-02

申请号：EP19765881.8

申请日：2019-08-26

IPC分类号： H04N19/115 ,  H04N19/146 ,  H04N19/15

CPC分类号： H04N19/146 ,  H04N19/15 ,  H04N19/115

公开(公告)号：EP3613211B1

公开(公告)日：2024-09-11

申请号：EP18720065.4

申请日：2018-03-29

IPC分类号： H04N19/117 ,  H04N19/85 ,  H04N19/146 ,  H04N19/152 ,  H04N19/103 ,  H04N19/156 ,  H04N19/176 ,  H04N19/172

CPC分类号： H04N19/172 ,  H04N19/117 ,  H04N19/146 ,  H04N19/152 ,  H04N19/156 ,  H04N19/85 ,  H04N19/103 ,  H04N19/176

公开(公告)号：EP4404560A3

公开(公告)日：2024-08-21

申请号：EP24167075.1

申请日：2011-02-17

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

发明人： Julien, Robilliard ,  Neusinger, Matthias ,  Helmrich, Christian ,  Hilpert, Johannes ,  Rettelbach, Nikolaus ,  Disch, Sascha ,  Edler, Bernd

IPC分类号： G10L19/06 ,  G10L19/008 ,  H04N19/50 ,  H04N19/105 ,  H04N19/146 ,  H04N19/154 ,  H04N19/156 ,  H04N19/70

CPC分类号： G10L19/008 ,  G10L19/06 ,  H04N19/50 ,  H04N19/105 ,  H04N19/156 ,  H04N19/154 ,  H04N19/146 ,  H04N19/70

摘要： An audio or video encoder and an audio or video decoder are based on a combination of two audio or video channels (201, 202) to obtain a first combination signal (204) as a mid signal and a residual signal (205) which can be derived using a predicted side signal derived from the mid signal. The first combination signal and the prediction residual signal are encoded (209) and written (212) into a data stream (213) together with the prediction information (206) derived by an optimizer (207) based on an optimization target (208) and a prediction direction indicator indicating a prediction direction associated with the residual signal. A decoder uses the prediction residual signal, the first combination signal, the prediction direction indicator and the prediction information to derive a decoded first channel signal and a decoded second channel signal. In an encoder example or in a decoder example, a real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. For calculating the prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information.

公开(公告)号：EP4395314A1

公开(公告)日：2024-07-03

申请号：EP22923385.3

申请日：2022-11-09

申请人： Tencent Technology (Shenzhen) Company Limited

发明人： YANG, Yong

IPC分类号： H04N19/124

CPC分类号： H04N19/134 ,  H04N19/124 ,  H04N19/146 ,  H04N19/59 ,  H04N19/91 ,  H04N19/176

摘要： The present application relates to a video encoding method and apparatus, a video decoding method and apparatus, a computer device, a storage medium, and a computer program product. The method comprises: acquiring basic encoding information and a basic quantization parameter corresponding to a current image to be encoded in a video, and calculating loss information of the current image to be encoded on the basis of the basic encoding information (202); mapping the basic quantization parameter to obtain an initial enhancement quantization parameter (204); using the initial enhancement quantization parameter to perform bit rate calculation to obtain an initial enhancement bit rate, and if there is a difference between the initial enhancement bit rate and a preset target enhancement bit rate, adjusting the initial enhancement quantization parameter to obtain a target enhancement quantization parameter (206); encoding the loss information on the basis of the target enhancement quantization parameter to obtain target enhancement encoding information, and obtaining, on the basis of the basic encoding information and the target enhancement encoding information, target encoding information corresponding to the current image to be encoded (208); and then performing data transmission on the target encoding information. The use of the method can improve the quality of multimedia video encoding.

公开(公告)号：EP3816925B1

公开(公告)日：2024-05-29

申请号：EP19920581.6

申请日：2019-12-02

IPC分类号： G06F16/13 ,  G06F16/182 ,  G06T1/60 ,  H04N19/423

CPC分类号： G06T1/60 ,  H04N19/423 ,  H04N19/12 ,  H04N19/146

公开(公告)号：EP3371974B1

公开(公告)日：2024-05-01

申请号：EP15907646.2

申请日：2015-11-06

IPC分类号： H04N19/23 ,  H04N19/105 ,  H04N19/46 ,  H04N19/117 ,  H04N19/142 ,  H04N19/146 ,  H04N19/17 ,  H04N19/179 ,  H04N19/82 ,  H04N19/426 ,  H04N19/58

CPC分类号： H04N19/105 ,  H04N19/46 ,  H04N19/117 ,  H04N19/142 ,  H04N19/146 ,  H04N19/17 ,  H04N19/179 ,  H04N19/82 ,  H04N19/426 ,  H04N19/58 ,  H04N19/23

公开(公告)号：EP2744204B1

公开(公告)日：2018-12-12

申请号：EP12831777.3

申请日：2012-09-14

申请人： Samsung Electronics Co., Ltd.

发明人： ALSHINA, Elena ,  CHEN, Jianle ,  HAN, Woo-jin

IPC分类号： H04N19/523 ,  H04N19/109 ,  H04N19/136 ,  H04N19/176 ,  H04N19/61 ,  H04N19/146 ,  H04N19/19

CPC分类号： H04N19/105 ,  H04N19/107 ,  H04N19/109 ,  H04N19/136 ,  H04N19/146 ,  H04N19/176 ,  H04N19/182 ,  H04N19/19 ,  H04N19/503 ,  H04N19/513 ,  H04N19/523 ,  H04N19/57 ,  H04N19/61

摘要： A method and apparatus for encoding and decoding a video. The method of encoding the video includes: determining whether a unidirectional motion estimation mode and a bidirectional motion estimation mode are used based on a size of a current prediction unit to be encoded, performing motion estimation and motion compensation on the current prediction unit by using the determined motion estimation mode, determining a motion estimation mode of the current prediction unit based on an encoding cost of the current prediction unit obtained through the motion estimation and the motion compensation, and encoding determined motion estimation mode information based on the size of the current prediction unit.

公开(公告)号：EP3409017A1

公开(公告)日：2018-12-05

申请号：EP17708900.0

申请日：2017-01-30

申请人： GoPro, Inc.

发明人： ABBAS, Adeel ,  ADSUMILLI, Balineedu, Chowdary ,  NEWMAN, David

IPC分类号： H04N19/30 ,  H04N19/187 ,  H04N19/167

CPC分类号： H04N19/30 ,  H04N19/146 ,  H04N19/167 ,  H04N19/187 ,  H04N19/29 ,  H04N19/59

摘要： Apparatus and methods for digital video data compression via a scalable, multi-resolution approach. In one embodiment, the video content may be encoded using a multi-resolution and/or multi-quality scalable coding approach that reduces computational and/or energy load on a client device. In one implementation, a low fidelity image is obtained based on a first full resolution image. The low fidelity image may be encoded to obtain a low fidelity bitstream. A second full resolution image may be obtained based on the low fidelity bitstream. A portion of a difference image obtained based on the second full resolution image and the first full resolution may be encoded to obtain a high fidelity bitstream. The low fidelity bitstream and the high fidelity bitstream may be provided to e.g., a receiving device.

公开(公告)号：EP1665766B1

公开(公告)日：2018-11-14

申请号：EP04783296.9

申请日：2004-09-03

申请人： Microsoft Technology Licensing, LLC

发明人： MUKERJEE, Kunal ,  HOLCOMB, Tom, W.

IPC分类号： H04N19/577 ,  H04N19/52 ,  H04N19/16

CPC分类号： H04N19/577 ,  H04N19/102 ,  H04N19/105 ,  H04N19/109 ,  H04N19/11 ,  H04N19/112 ,  H04N19/117 ,  H04N19/129 ,  H04N19/13 ,  H04N19/137 ,  H04N19/146 ,  H04N19/147 ,  H04N19/159 ,  H04N19/16 ,  H04N19/172 ,  H04N19/176 ,  H04N19/18 ,  H04N19/184 ,  H04N19/186 ,  H04N19/196 ,  H04N19/46 ,  H04N19/463 ,  H04N19/51 ,  H04N19/52 ,  H04N19/523 ,  H04N19/593 ,  H04N19/61 ,  H04N19/63 ,  H04N19/70 ,  H04N19/82 ,  H04N19/86 ,  H04N19/93

摘要： For interlaced B-fields or interlaced B-frames, forward motion vectors are predicted by an encoder/decoder using forward motion vectors from a forward motion vector buffer, and backward motion vectors are predicted using backward motion vectors from a backward motion vector buffer. The resulting motion vectors are added to the corresponding buffer. Holes in motion vector buffers can be filled in with estimated motion vector values. An encoder/decoder switches prediction modes between fields in a field-coded macroblock of an interlaced B-frame. For interlaced B-frames and interlaced B-fields, an encoder/decoder computes direct mode motion vectors. For interlaced B-fields or interlaced B-frames, an encoder/decoder uses 4MV coding. An encoder/decoder uses "self-referencing" B-frames. An encoder sends binary information indicating whether a prediction mode is forward or not-forward for one or more macroblocks in an interfaced B-field. An encoder/decoder uses intra-coded B-fields ["BI-fields"].

公开(公告)号：EP3393126A1

公开(公告)日：2018-10-24

申请号：EP17753488.0

申请日：2017-02-16

申请人： Samsung Electronics Co., Ltd.

发明人： CHOI, In-kwon ,  PARK, Min-woo

IPC分类号： H04N19/105 ,  H04N19/593 ,  H04N19/117 ,  H04N19/122

CPC分类号： H04N19/105 ,  H04N19/11 ,  H04N19/117 ,  H04N19/146 ,  H04N19/176 ,  H04N19/59 ,  H04N19/593

摘要： Provided is an image predicting method including: obtaining a plurality of adjacent samples located adjacent to a current block; determining an adjacent sample as a reference sample to be referred to by a current sample, the adjacent sample being from among the plurality of adjacent samples and being indicated by a direction of an intra mode of the current block; and adjusting a sample value of the reference sample according to a reference distance indicating a distance between the reference sample and the current sample, and determining a prediction value of the current sample based on the adjusted sample value of the reference sample.