公开(公告)号：US20250056012A1

公开(公告)日：2025-02-13

申请号：US18927806

申请日：2024-10-25

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

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

IPC: H04N19/159 ,  H04N19/17

Abstract: A method for video decoding includes: obtaining a first control flag signaled at a specified level that includes one of following levels: a Transform Block (TB) level, a Coding Block (CB) level, a slice level, a picture level, or a sequence level, wherein the first control flag indicates whether a Decoder-side High Precision Intra Mode Derivation (DHI) mode is enabled, and in response to determining that the DHI mode is enabled, deriving, using a predefined method, high precision intra mode under a predefined condition, where the predefined condition includes one of following conditions: specific modes, or specific block sizes, or the DHI mode is used at the specified level.

公开(公告)号：US20250039428A1

公开(公告)日：2025-01-30

申请号：US18893829

申请日：2024-09-23

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

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

IPC: H04N19/50 ,  H04N19/132 ,  H04N19/167 ,  H04N19/176 ,  H04N19/186 ,  H04N19/463 ,  H04N19/80 ,  H04N19/85

Abstract: The present disclosure provides a method for decoding video data. The method comprises: obtaining a video block from a bitstream; obtaining neighboring luma and chroma sample values of the video block; performing at least one pre-operation to the neighboring luma sample values and to internal luma sample values in the video block, to obtain pre-operated neighboring and internal luma sample values, wherein performing the at least one pre-operation comprises calculating sample differences based on the neighboring and internal luma sample values; deriving a linear model by using the pre-operated neighboring luma sample values and the neighboring chroma sample values; predicting each of internal chroma sample values in the video block by applying the linear model to one or more corresponding pre-operated internal luma sample values for that internal chroma sample value; and obtaining decoded video block using the predicted internal chroma sample values.

公开(公告)号：US20250024059A1

公开(公告)日：2025-01-16

申请号：US18899389

申请日：2024-09-27

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

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

IPC: H04N19/44 ,  H04N19/46

Abstract: Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video coding and compression with high precision intra prediction technology. In one method, a decoder obtains a first control flag signaled at a specified level that comprises one of following levels: a Transform Block (TB) level, a Coding Block (CB) level, a slice level, a picture level, or a sequence level, where the first control flag indicates whether a Decoder-side High Precision Intra Mode Derivation (DHI) mode is enabled.

公开(公告)号：US20250016308A1

公开(公告)日：2025-01-09

申请号：US18891333

申请日：2024-09-20

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

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

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

Abstract: Implementations of the disclosure provide a video processing apparatus and method for performing intra prediction on a video block. The video processing method may include receiving, by a processor, reference samples from a video frame of a video comprising the video block. The video processing method may further include determining, by the processor, a reference sample filter based on a size of each video block. The reference sample filter is among a plurality of reference sample filters each derived for a different video block size. The video processing method may also include applying, by the processor, the determined reference sample filter to the received reference samples. The video processing method may additionally include performing, by the processor, the intra prediction on the video block using the filtered reference samples.

公开(公告)号：US20250008141A1

公开(公告)日：2025-01-02

申请号：US18885607

申请日：2024-09-14

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

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

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/172 ,  H04N19/176

Abstract: Methods for video decoding and encoding, apparatuses and non-transitory storage media are provided. In one decoding method, the decoder determines that an advanced motion vector prediction (AMVP)-Merge (AM) mode is enabled for a current picture or a slice of the current picture. Furthermore, the decoder obtains an AMVP motion vector (MV) of a current block in the current picture, for a first list of reference pictures LX where X is 0 or 1, as an LX MV. Moreover, the decoder obtains a list of valid merge MV candidates for a second list of reference pictures L(1−X), where the list of valid merge MV candidates comprises merge candidates that have L(1−X) MV. Further, the decoder selects an L(1−X) MV of the AM mode among the list of valid merge MV candidates.

公开(公告)号：US20240430466A1

公开(公告)日：2024-12-26

申请号：US18820207

申请日：2024-08-29

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

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

IPC: H04N19/44 ,  H04N19/186 ,  H04N19/46

Abstract: An electronic apparatus performs a method of decoding video data. The method includes: receiving, from the bitstream, a plurality of syntax elements associated with a coding unit, the plurality of syntax elements indicating the coding tree type of the coding unit, and whether the local dual tree mode is enabled for the coding unit; and in accordance with the determination that the coding tree type of the coding unit is a single tree, and the local dual tree mode is enabled for the coding unit: disabling the palette mode for the coding unit when the coding unit has the size equal to or less than a predefined threshold. The disabling palette mode for the coding unit may include: disabling the palette mode for both the luma component and chroma component of the coding unit, or disabling the palette mode for only the chroma component of the coding unit.

公开(公告)号：US20240348794A1

公开(公告)日：2024-10-17

申请号：US18755674

申请日：2024-06-27

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

Inventor： Xiaoyu XIU ,  Yi-Wen CHEN ,  Xianglin WANG ,  Shuiming YE ,  Tsung-Chuan MA ,  Hong-Jheng JHU

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176

CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176

Abstract: Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for coding a video signal. A method includes obtaining a first reference picture and a second reference picture associated with a video block; obtaining first prediction samples of the video block from the first reference picture; obtaining second prediction samples of the video block from the second reference picture; obtaining padded prediction samples, and obtaining horizontal and vertical gradient values of the first prediction samples and the second prediction samples based on the padded prediction samples; obtaining motion refinements for samples in the video block based on the horizontal and vertical gradient values; and obtaining bi-prediction samples of the video block based on the motion refinements.

公开(公告)号：US20240348777A1

公开(公告)日：2024-10-17

申请号：US18753680

申请日：2024-06-25

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

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

IPC: H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/593 ,  H04N19/70

CPC classification number: H04N19/11 ,  H04N19/159 ,  H04N19/176 ,  H04N19/593 ,  H04N19/70

Abstract: Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video coding. In one method, a decoder obtains a first 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 first signaled flag, the decoder obtains a second signaled flag in transform block (TB), coding block (CB), slice, picture, or sequence level that indicates whether signaling of an index of a template for TIMD is enabled, where the index of the template is signaled to derive the intra prediction mode for the current video block.

公开(公告)号：US20240333956A1

公开(公告)日：2024-10-03

申请号：US18737844

申请日：2024-06-07

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

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

IPC: H04N19/50 ,  H04N19/132 ,  H04N19/14 ,  H04N19/176 ,  H04N19/186

CPC classification number: H04N19/50 ,  H04N19/132 ,  H04N19/14 ,  H04N19/176 ,  H04N19/186

Abstract: The present disclosure provides a method for decoding video data. The method comprises: obtaining a video block of the video data from a bitstream; classifying a luma sample corresponding to a chroma sample of the video block into one of a plurality of sample groups based on edge information of the luma sample, wherein the luma sample is obtained from one or more of luma samples of the video block; and predicting the chroma sample by applying one of a plurality of linear prediction models corresponding to the classified sample group to the luma sample.

公开(公告)号：US20240314339A1

公开(公告)日：2024-09-19

申请号：US18675121

申请日：2024-05-27

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: H04N19/186 ,  H04N19/172 ,  H04N19/70

CPC classification number: H04N19/186 ,  H04N19/172 ,  H04N19/70

Abstract: Methods and devices are provided for video coding. In the method, a decoder may receive a picture frame including one or more components, where the one or more components include a first component and a second component. The decoder determines a classifier for a respective sample of the second component according to a collocated sample of the first component; obtains an indicator that indicates one or more bandNum segments of the one or more components in response to determining that the classifier is a band classifier or a joint classifier encompassing the band classifier; determines, according to the indicator and from a mapping table, the one or more bandNum segments and determining a band offset according to the one or more bandNum segments; and modifies the respective sample of the second component according to a sample offset including the band offset.