公开(公告)号：US20230224505A1

公开(公告)日：2023-07-13

申请号：US18080201

申请日：2022-12-13

Applicant: TENCENT AMERICA LLC

Inventor： Ding DING ,  Xiaozhong Xu ,  Shan Liu

IPC: H04N19/86 ,  H04N19/80 ,  H04N19/167 ,  H04N19/136 ,  H04N19/42 ,  H04N19/176 ,  G06N3/08

CPC classification number: H04N19/86 ,  G06N3/08 ,  H04N19/42 ,  H04N19/80 ,  H04N19/136 ,  H04N19/167 ,  H04N19/176

Abstract: A method and apparatus for reducing artifacts in a compressed image using a neural-network based deblocking filter. The method may include receiving at least one reconstructed image, wherein each reconstructed image comprises one or more reconstructed blocks and extracting boundary areas associated with boundaries of the one or more reconstructed blocks in the at least one reconstructed image. The extracted boundary areas may be input in a trained deblocking model to generate boundary areas having reduced artifacts and the trained deblocking mode is trained on training data based on estimated compression by a neural image compression (NIC) network. The edge areas associated with the generated boundary areas may be removed; and at least one reconstructed image with reduced artifacts may be generated based on the generated boundary areas.

公开(公告)号：US20230217045A1

公开(公告)日：2023-07-06

申请号：US18120624

申请日：2023-03-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vivienne Sze ,  Madhukar Budagavi ,  Woo-Shik Kim ,  Do-Kyoung Kwon ,  Minhua Zhou

IPC: H04N19/86 ,  H04N19/70 ,  H04N19/117 ,  H04N19/463 ,  H04N19/82 ,  H04N19/80 ,  H04N19/91

CPC classification number: H04N19/86 ,  H04N19/70 ,  H04N19/117 ,  H04N19/463 ,  H04N19/82 ,  H04N19/80 ,  H04N19/91

Abstract: A method for sample adaptive offset (SAO) filtering and SAO parameter signaling in a video encoder is provided that includes determining SAO parameters for largest coding units (LCUs) of a reconstructed picture, wherein the SAO parameters include an indicator of an SAO filter type and a plurality of SAO offsets, applying SAO filtering to the reconstructed picture according to the SAO parameters, and entropy encoding LCU specific SAO information for each LCU of the reconstructed picture in an encoded video bit stream, wherein the entropy encoded LCU specific SAO information for the LCUs is interleaved with entropy encoded data for the LCUs in the encoded video bit stream. Determining SAO parameters may include determining the LCU specific SAO information to be entropy encoded for each LCU according to an SAO prediction protocol.

公开(公告)号：US20230209073A1

公开(公告)日：2023-06-29

申请号：US18117083

申请日：2023-03-03

Applicant: ARRIS Enterprises LLC

Inventor： Koohyar Minoo ,  Ajay K. Luthra ,  David M. Baylon

IPC: H04N19/36 ,  H04N19/187 ,  H04N19/46 ,  H04N19/127 ,  H04N19/30 ,  H04N19/147 ,  H04N19/33 ,  H04N19/34 ,  H04N19/80

CPC classification number: H04N19/36 ,  H04N19/187 ,  H04N19/46 ,  H04N19/127 ,  H04N19/30 ,  H04N19/147 ,  H04N19/33 ,  H04N19/34 ,  H04N19/80 ,  H04N19/186

Abstract: A Scalable Video Coding (SVC) process is provided for scalable video coding that takes into account color gamut primaries along with spatial resolution. The process provides for re-sampling using video color data obtained from an encoder or decoder process of a base layer (BL) in a multi-layer system to enable improved encoding and decoding in an enhancement layer (EL) or higher layers taking into account color conversion between layers. Examples of applicable SVC include MPEG-4 Advanced Video Coding (AVC) and High Efficiency Video Coding (HEVC). With the SVC process, video data expressed in one color gamut space can be used for prediction in encoding with a possibly different color space, and accommodation for different spatial resolution and bit-depth can be made as well.

公开(公告)号：US11683506B2

公开(公告)日：2023-06-20

申请号：US17576610

申请日：2022-01-14

Applicant: IDEAHUB INC.

Inventor： Yoon Sik Choe ,  Jang Won Choi

IPC: H04N19/186 ,  H04N19/80 ,  H04N19/117 ,  H04N19/11 ,  H04N19/182 ,  H04N19/593 ,  H04N19/70

CPC classification number: H04N19/186 ,  H04N19/117 ,  H04N19/80 ,  H04N19/11 ,  H04N19/182 ,  H04N19/593 ,  H04N19/70

Abstract: Disclosed are methods, apparatuses, and systems for encoding and decoding an image. The present invention provides an intra prediction unit receives an input image, removes high frequency ingredients by low pass filtering an encoded luma pixel value in the input image during intra prediction, and generates a prediction block by predicting a chroma pixel value by using a low pass filter (LPF) LM chroma mode for applying an LM chroma mode, which is an extended chroma mode technique for generating a prediction block by predicting the chroma pixel value by applying a correlation between color planes to the luma pixel value having removed therefrom the high frequency ingredients.

公开(公告)号：US20230188734A1

公开(公告)日：2023-06-15

申请号：US18106293

申请日：2023-02-06

Applicant: InterDigital VC Holdings, Inc.

Inventor： Edouard Francois ,  Christophe Chevance ,  Franck Hiron

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/80

CPC classification number: H04N19/186 ,  H04N19/80 ,  H04N19/176

Abstract: Described are systems and methods for encoding or decoding a picture part of video information can include using a refinement mode per block where the refinement mode can be based on a refinement parameter. The refinement mode can include a cross-component refinement that can be a cross-component chroma refinement. The refinement mode can include enabling selection per block of a refinement parameter where the refinement parameter can include one or more chroma refinement parameters included in a chroma refinement table.

公开(公告)号：US11677956B2

公开(公告)日：2023-06-13

申请号：US17646196

申请日：2021-12-28

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Kai Zhang ,  Li Zhang ,  Hongbin Liu ,  Yue Wang

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/30 ,  H04N19/80

CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/30 ,  H04N19/80

Abstract: Devices, systems and methods for digital video coding, which includes simplified cross-component prediction, are provided. In a representative aspect, a method for video coding includes receiving a bitstream representation of a current block of video data including at least one luma component and at least one chroma component, predicting, using a linear model, a first set of samples of the at least one chroma component based on a second set of samples that is selected by sub-sampling samples of the at least one luma component, and processing, based on the first and second sets of samples, the bitstream representation to generate the current block. In another representative aspect, the second set of samples are neighboring samples of the current block and are used for an intra prediction mode of the at least one luma component.

公开(公告)号：US20230171435A1

公开(公告)日：2023-06-01

申请号：US17615156

申请日：2021-01-20

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Lijie ZHANG ,  Guannan CHEN

IPC: H04N19/80 ,  H04N19/117 ,  H04N19/172 ,  H04N19/139 ,  H04N19/52 ,  H04N19/105 ,  H04N19/436

CPC classification number: H04N19/80 ,  H04N19/117 ,  H04N19/172 ,  H04N19/139 ,  H04N19/52 ,  H04N19/105 ,  H04N19/436

Abstract: The present disclosure relates to the field of image processing technology, and in particular, to image encoding, decoding methods and devices, an encoder-decoder. The method includes: acquiring a visual saliency heat map of an image of a current frame, and filtering, by using the visual saliency heat map of the image of the current frame, the image of the current frame to obtain a target image; acquiring, by using the target image and an input image of a next frame, a motion estimation vector and a target prediction image of the input image of the next frame; and encoding a difference image between the input image of the next frame and the target prediction image and the motion estimation vector.

公开(公告)号：US20230156197A1

公开(公告)日：2023-05-18

申请号：US18098489

申请日：2023-01-18

Applicant: LG Electronics Inc.

Inventor： Junghak NAM ,  Jangwon CHOI

IPC: H04N19/132 ,  H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/169 ,  H04N19/46 ,  H04N19/80

CPC classification number: H04N19/132 ,  H04N19/117 ,  H04N19/176 ,  H04N19/186 ,  H04N19/1883 ,  H04N19/46 ,  H04N19/80

Abstract: According to an embodiment of the present document, a method for increasing the accuracy of in-loop filtering is proposed. In an example, the filtering accuracy of chroma blocks can be improved on the basis of luma blocks by performing a cross component adaptive loop filtering process.

公开(公告)号：US11647230B2

公开(公告)日：2023-05-09

申请号：US17357166

申请日：2021-06-24

Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

Inventor： Kai Zhang ,  Li Zhang ,  Hongbin Liu ,  Yue Wang

IPC: H04N19/186 ,  H04N19/70 ,  H04N19/80 ,  H04N19/105 ,  H04N19/117 ,  H04N19/176 ,  H04N19/50 ,  H04N19/132 ,  H04N19/172 ,  H04N19/30

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/117 ,  H04N19/132 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/30 ,  H04N19/50 ,  H04N19/80

Abstract: A video processing method is provided, including: performing a conversion between a coded representation of a video including one or more video regions and the video, wherein the coded representation includes reshaping model information applicable for in-loop reshaping (ILR) of some of the one or more video regions, wherein the reshaping model information provides information for a reconstruction of a video unit of a video region based on a representation in a first domain and a second domain and/or scaling chroma residue of a chroma video unit, wherein the reshaping model information includes a parameter set that includes a first syntax element that derives a number of bits used to represent a second syntax element specifying an absolute delta codeword value from a corresponding bin, and wherein the first syntax element has a value smaller than a threshold.

公开(公告)号：US20190238890A1

公开(公告)日：2019-08-01

申请号：US16216650

申请日：2018-12-11

Applicant: MEDIATEK INC.

Inventor： Chia-Ming TSAI ,  Tzu-Der Chuang ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Yu-Wen Huang

IPC: H04N19/86 ,  H04N19/80 ,  H04N19/117 ,  H04N19/137 ,  H04N19/132 ,  H04N19/176

CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176 ,  H04N19/80

Abstract: A deblocking filtering method includes receiving reconstructed video data associated with a block boundary in a video coding system. The block boundary has N lines of samples crossing the block boundary from a P side to a Q side of the boundary. The method further includes determining whether to apply a first filter set to reduce block artifacts at the block boundary based on whether a first inter-side difference of a first line of the N lines of samples is greater than an inter-side difference threshold, determining a filter length of a filter in the first filter set based on a first side length of the P side, and a second side length of the Q side when it is determined to apply the first filter set, and applying at least one filter in the first filter set with the determined filter length on the block boundary.