公开(公告)号：US20250047885A1

公开(公告)日：2025-02-06

申请号：US18919406

申请日：2024-10-17

Applicant: BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD.

Inventor： Ning YAN ,  Xiaoyu XIU ,  Che-Wei KUO ,  Wei CHEN ,  Hong-Jheng JHU ,  Xianglin WANG ,  Bing YU

IPC: H04N19/44 ,  H04N19/176 ,  H04N19/182

Abstract: Methods for video decoding and encoding, apparatuses and non-transitory storage media are provided. In one decoding method, the decoder obtains a plurality of scaling parameters for Local Illumination Compensation (LIC) that represents scaling factors in compensating illumination changes between a reference block and a current block. Furthermore, the decoder derives a predicted pixel in the current block based on at least one of the plurality of scaling parameters, or based on a plurality of pixels in the reference block with a subset of the plurality of scaling parameters.

公开(公告)号：US20250047873A1

公开(公告)日：2025-02-06

申请号：US18800755

申请日：2024-08-12

Applicant: BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD.

Inventor： Che-Wei KUO ,  Xiaoyu XIU ,  Ning YAN ,  Hong-Jheng JHU ,  Yi-Wen CHEN ,  Wei CHEN ,  Han GAO ,  Xianglin WANG ,  Bing YU

IPC: H04N19/186 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176 ,  H04N19/184 ,  H04N19/44 ,  H04N19/50

Abstract: A method for decoding video data. The method including obtaining, from a bitstream, a video block and region information, wherein the region information comprises an index indicating a region selected from a set of regions located external to the video block for deriving a multiple linear regression (MLR) model, obtaining luma and chroma sample values in the region based on the region information; deriving the MLR model using the luma and chroma sample values in the region, predicting each of the chroma sample values in the video block by applying the MLR model to corresponding luma sample values for that chroma sample, and obtaining decoded video block using the predicted chroma sample values.

公开(公告)号：US20250039377A1

公开(公告)日：2025-01-30

申请号：US18775207

申请日：2024-07-17

Applicant: BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD.

Inventor： Xiaoyu XIU ,  Ning YAN ,  Yi-Wen CHEN ,  Che-Wei KUO ,  Wei CHEN ,  Hong-Jheng JHU ,  Han GAO ,  Xianglin WANG ,  Bing YU

IPC: H04N19/12 ,  H04N19/167 ,  H04N19/176 ,  H04N19/18 ,  H04N19/61

Abstract: This disclosure provides a video decoding apparatus and method for transform coefficient sign prediction on a video decoder side. The method may include: receiving, by a decoder, a bitstream comprising encoded data of transform coefficients of a transform block of a video frame; determining, by the decoder, multiple regions in the transform block, where the multiple regions include a sign prediction area for performing the sign prediction and at least one other region; parsing the bitstream, by the decoder, to obtain signs of transform coefficients associated with the multiple regions of the transform block according to a region-based order used to signal the signs of the transform coefficients; estimating, by the decoder, original signs for a set of candidate transform coefficients associated with the sign prediction area of the transform block; and updating the transform coefficients associated with the sign prediction area based on the estimated original signs.

公开(公告)号：US20250039365A1

公开(公告)日：2025-01-30

申请号：US18917993

申请日：2024-10-16

Applicant: BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD.

Inventor： Wei CHEN ,  Xiaoyu XIU ,  Yi-Wen CHEN ,  Hong-Jheng JHU ,  Che-Wei KUO ,  Ning YAN ,  Xianglin WANG ,  Bing YU

IPC: H04N19/105 ,  H04N19/129 ,  H04N19/139 ,  H04N19/159 ,  H04N19/167 ,  H04N19/50

Abstract: Methods for video decoding and encoding, apparatuses and non-transitory storage media are provided. In one decoding method, the decoder obtains a restricted area that is not adjacent to a current coding unit (CU) according to a value associated with the restricted area. Additionally, the decoder obtains one or more motion vector (MV) candidates from a plurality of non-adjacent CUs to the current CU based on the restricted area. Furthermore, the decoder obtains one or more control point motion vectors (CPMVs) for the current CU based on the one or more MV candidates.

公开(公告)号：US20250008107A1

公开(公告)日：2025-01-02

申请号：US18885498

申请日：2024-09-13

Applicant: BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD.

Inventor： Xiaoyu XIU ,  Yi-Wen CHEN ,  Wei CHEN ,  Han GAO ,  Che-Wei KUO ,  Hong-Jheng JHU ,  Ning YAN ,  Xianglin WANG ,  Bing YU

IPC: H04N19/13 ,  H04N19/184 ,  H04N19/196

Abstract: Methods for video decoding and encoding, apparatuses and non-transitory computer-readable storage media thereof are provided. In one method for video decoding, a binary arithmetic decoder may obtain a first probability for a binary symbol according to a first adaptation parameter, where the binary symbol is related to one given context model for the binary arithmetic decoder and the binary symbol is from a plurality of binary symbols associated with the context model. Furthermore, the decoder may obtain a second probability for the binary symbol according to a second adaptation parameter, and then obtain a multi-hypothesis probability according to the first probability, a first adaptive weight, the second probability, and a second adaptive weight, where the multi-hypothesis probability determines a probability of the binary symbol equaling to a binary value. Moreover, the decoder may decode the binary symbol according to the multi-hypothesis probability.

公开(公告)号：US20240364884A1

公开(公告)日：2024-10-31

申请号：US18769189

申请日：2024-07-10

Applicant: BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD.

Inventor： Xiaoyu XIU ,  Yi-Wen CHEN ,  Tsung-Chuan MA ,  Hong-Jheng JHU ,  Wei CHEN ,  Che-Wei KUO ,  Xianglin WANG ,  Bing YU

IPC: H04N19/12 ,  H04N19/124 ,  H04N19/132 ,  H04N19/18 ,  H04N19/186 ,  H04N19/30 ,  H04N19/60 ,  H04N19/70

CPC classification number: H04N19/12 ,  H04N19/124 ,  H04N19/132 ,  H04N19/18 ,  H04N19/186 ,  H04N19/30 ,  H04N19/60 ,  H04N19/70

Abstract: An electronic apparatus performs a method of coding video data. The method comprises: receiving, from the bitstream, syntax elements associated with a coding unit, wherein the syntax elements include a first coded block flag (CBF) for residual samples of a first chroma component, a second CBF for residual samples of a second chroma component, and a third syntax element indicating whether adaptive color transform (ACT) is applied to the coding unit; determining whether to perform the chroma residual scaling to the residual samples of the chroma components according to the first CBF, the second CBF, and the third syntax element; in accordance with a determination to perform the chroma residual scaling to the residual samples of the first and second chroma components, scaling the residual samples of the at least one of the first and second chroma components based on a corresponding scaling parameter.

公开(公告)号：US20240314318A1

公开(公告)日：2024-09-19

申请号：US18677817

申请日：2024-05-29

Applicant: BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD.

Inventor： Wei CHEN ,  Xiaoyu XIU ,  Yi-Wen CHEN ,  Hong-Jheng JHU ,  Che-Wei KUO ,  Ning YAN ,  Xianglin WANG ,  Bing YU

IPC: H04N19/129 ,  H04N19/105 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/42 ,  H04N19/463 ,  H04N19/52

CPC classification number: H04N19/129 ,  H04N19/105 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/42 ,  H04N19/463 ,  H04N19/52

Abstract: A method of video decoding, apparatuses and non-transitory computer-readable storage media thereof are provided. The method of video decoding includes obtaining a first parameter based on a first neighbor block of a current block; obtaining a second parameter based on the first neighbor block and/or a second neighbor block of the current block; constructing an affine model using the first parameter and the second parameter; and obtaining a control point motion vector (CPMV) for the current block based on the affine model. The first neighbor block and the second neighbor block are obtained from a plurality of neighbor blocks to the current block based on at least one scanning area and at least one scanning distance. The first neighbor block and the second neighbor block are obtained by scanning the at least one scanning area at the at least one scanning distance.

公开(公告)号：US20240305792A1

公开(公告)日：2024-09-12

申请号：US18669692

申请日：2024-05-21

Applicant: BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD.

Inventor： Ning YAN ,  Yi-Wen CHEN ,  Xiaoyu XIU ,  Wei CHEN ,  Che-Wei KUO ,  Hong-Jheng JHU ,  Xianglin WANG ,  Bing YU

IPC: H04N19/159 ,  H04N19/147 ,  H04N19/176

CPC classification number: H04N19/159 ,  H04N19/147 ,  H04N19/176

Abstract: Implementations of the disclosure provide a video processing method for performing intra prediction on a video block. The video processing method may include receiving reconstructed samples from a video frame in the bitstream including the video block. The video processing method may further include determining reference samples in neighboring video blocks of the video block according to a first slant line and a second slant line through a sample of the video block. The first slant line is along an interpolation direction and the second slant line is perpendicular to the first slant line. The video processing method may also include interpolating the sample of the video block based on the reference samples.

公开(公告)号：US20240298007A1

公开(公告)日：2024-09-05

申请号：US18661560

申请日：2024-05-10

Applicant: BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD.

Inventor： Hong-Jheng JHU ,  Xiaoyu XIU ,  Yi-Wen CHEN ,  Wei CHEN ,  Che-Wei KUO ,  Ning YAN ,  Xianglin Wang ,  Bing YU

IPC: H04N19/159 ,  H04N19/105 ,  H04N19/176

CPC classification number: H04N19/159 ,  H04N19/105 ,  H04N19/176

Abstract: Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video coding. In one method, a decoder receives a signaled flag that indicates whether a template-based intra mode derivation (TIMD) mode is applied on a current video block; and in response to determining that the TIMD mode is applied on the current video block based on the signaled flag, the decoder derives an intra prediction mode from the TIMD mode based on different reference lines in a reconstruction area of the current video block, where the reconstruction area comprises reconstructed neighboring blocks for the current video block.

公开(公告)号：US20240214595A1

公开(公告)日：2024-06-27

申请号：US18600315

申请日：2024-03-08

Applicant: BEIJING DAJIA INTERNET INFORMATION TECHNOLOGY CO., LTD.

Inventor： Che-Wei KUO ,  Xiaoyu XIU ,  Wei CHEN ,  Xianglin WANG ,  Yi-Wen CHEN ,  Hong-Jheng JHU ,  Ning YAN ,  Bing YU

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/124 ,  H04N19/186

CPC classification number: H04N19/44 ,  H04N19/105 ,  H04N19/124 ,  H04N19/186

Abstract: An electronic apparatus performs a method of decoding video signal, including: receiving, from the video signal, a picture frame that includes a first component, and a second component; selecting an edge direction across a collocated sample of the first component or a current sample of the second component relative to the respective sample of the second component; calculating a first edge strength determining a difference between values of two samples from the group consisting of the collocated or current sample, a first neighbouring sample, and a second neighbouring sample; quantizing the first edge strength into M segments according to M-1 threshold values; determining the classifier for the respective sample of the second component based on the M segments; determining a sample offset for the respective sample of the second component according to the classifier; and modifying the respective sample of the second component based on the determined sample offset.