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公开(公告)号：US20250056012A1
公开(公告)日：2025-02-13
申请号：US18927806
申请日：2024-10-25
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.
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公开(公告)号：US20250047835A1
公开(公告)日：2025-02-06
申请号：US18919384
申请日：2024-10-17
Inventor： Yi-Wen CHEN , Xiaoyu XIU , Xianglin WANG , Tsung-Chuan MA
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/513
Abstract: Methods for video encoding, computing devices, and non-transitory computer readable storage mediums are provided. One method includes obtaining multiple blocks divided from a video picture, where each of the multiple blocks is to be encoded by an intra prediction mode or an inter prediction mode; for a current block in the multiple blocks: in response to the current block satisfying multiple pre-defined conditions, determining whether weighted prediction is enabled for the current block, and determining whether different weights are used when averaging list 0 predicted samples and list 1 predicted samples for the current block; determining whether to disable an application of Decoder-side Motion Vector Refinement (DMVR) on the current block based on at least one of the two determinations when DMVR is configured to be applied in a current picture that comprises the current block; and forming a bitstream based on prediction mode information of the current block.
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公开(公告)号：US20250039428A1
公开(公告)日：2025-01-30
申请号：US18893829
申请日：2024-09-23
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.
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公开(公告)号：US20250024059A1
公开(公告)日：2025-01-16
申请号：US18899389
申请日：2024-09-27
Inventor： Hong-Jheng JHU , Xiaoyu XIU , Wei CHEN , Che-Wei KUO , Ning YAN , Han GAO , Xianglin WANG , Bing YU
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.
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公开(公告)号：US20250016308A1
公开(公告)日：2025-01-09
申请号：US18891333
申请日：2024-09-20
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.
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Patent Agency Ranking
公开(公告)号：US20250008141A1
公开(公告)日：2025-01-02
申请号：US18885607
申请日：2024-09-14
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.
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公开(公告)号：US20240430466A1
公开(公告)日：2024-12-26
申请号：US18820207
申请日：2024-08-29
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.
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公开(公告)号：US20240430438A1
公开(公告)日：2024-12-26
申请号：US18824118
申请日：2024-09-04
Inventor： Xiaoyu XIU , Yi-Wen CHEN , Xianglin WANG , Bing YU
IPC: H04N19/137 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
Abstract: Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video encoding. The method includes dividing a video block to multiple non-overlapped video subblocks, dividing a video block to multiple non-overlapped video subblocks, determining a first reference picture I(0) and a second reference picture I(1), determining first prediction samples I(0)(i, j)'s, determining second prediction samples I(1)(i, j)'s, determining horizontal and vertical gradient values of the first prediction samples I(0)(i, j)'s and second prediction samples I(1)(i, j)'s, determining motion refinements for samples in video subblock based on the BDOF when the video block is not coded in affine mode, determining motion refinements for samples in the video subblock based on the PROF when the video block is coded in affine mode, and determining prediction samples of the video block based on the motion refinements.
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公开(公告)号：US20240388695A1
公开(公告)日：2024-11-21
申请号：US18785375
申请日：2024-07-26
Inventor： Yi-Wen CHEN , Xiaoyu XIU , Xianglin WANG , Tsung-Chuan MA
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/513
Abstract: A method for video encoding is provided. The method includes obtaining, by an encoder, a plurality of blocks from a video picture, wherein each of the plurality of blocks is to be encoded by an intra prediction mode or an inter prediction mode; in response to a first pre-defined condition being satisfied, determining, by the encoder, that a current block in the plurality of blocks is eligible for an application of Decoder-side Motion Vector Refinement (DMVR); in response to the current block being eligible for both applications of DMVR and Bi-Directional Optical Flow (BDOF), determining, by the encoder, whether a pre-defined criterion based on mode information of the current block is satisfied; avoiding, by the encoder in response to the pre-defined criterion being satisfied, applying BDOF to a subblock in the current block; and outputting, by the encoder by a bitstream, prediction mode information of the current block.
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公开(公告)号：US20240364920A1
公开(公告)日：2024-10-31
申请号：US18766291
申请日：2024-07-08
Inventor： Xiaoyu XIU , Yi-Wen CHEN , Xianglin WANG , Bing YU
IPC: H04N19/577 , H04N19/105 , H04N19/132 , H04N19/139 , H04N19/176 , H04N19/513 , H04N19/70
CPC classification number: H04N19/577 , H04N19/105 , H04N19/132 , H04N19/139 , H04N19/176 , H04N19/513 , H04N19/70
Abstract: A method for video encoding, a comuting device, and a non-transitory computer readable storage medium are provided. The method includes transmitting, by an encoder, a first control flag in a sequence parameter set (SPS), a second control flag in the SPS, and a third control flag in the SPS; transmitting, by the encoder, a first presence flag in the SPS when the first control flag is true, a second presence flag in the SPS when the second control flag is true and a third presence flag in the SPS when the third control flag is true; transmitting, by the encoder, a first/second/third picture control flag in a picture header of each picture that refers to the SPS when the first/second/third presence flag in the SPS is true.
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