-
公开(公告)号：US12132910B2
公开(公告)日：2024-10-29
申请号：US17571434
申请日：2022-01-07
发明人： Xiaoyu Xiu , Yi-Wen Chen , Xianglin Wang , Bing Yu
IPC分类号： H04N19/105 , H04N19/132 , H04N19/137 , H04N19/159 , H04N19/176
CPC分类号： H04N19/137 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
摘要： Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for video decoding. The method includes dividing a video block to multiple non-overlapped video subblocks, dividing a video block to multiple non-overlapped video subblocks, obtaining a first reference picture I(0) and a second reference picture I(1), obtaining first prediction samples I(0)(i,j)'s, obtaining second prediction samples I(1)(i,j)'s, obtaining horizontal and vertical gradient values of the first prediction samples I(0)(i,j)'s and second prediction samples I(1)(i,j)'s, obtaining motion refinements for samples in the video subblock based on the BDOF when the video block is not coded in affine mode, obtaining motion refinements for samples in the video subblock based on the PROF when the video block is coded in affine mode, and obtaining prediction samples of the video block based on the motion refinements.
-
公开(公告)号：US12108067B2
公开(公告)日：2024-10-01
申请号：US17953233
申请日：2022-09-26
发明人： Hong-Jheng Jhu , Xianglin Wang , Xiaoyu Xiu , Yi-Wen Chen , Tsung-Chuan Ma , Wei Chen , Bing Yu
IPC分类号： H04N19/44 , H04N19/186 , H04N19/46
CPC分类号： H04N19/44 , H04N19/186 , H04N19/46
摘要： An electronic apparatus performs a method of decoding video data. The method comprises: receiving, from the bitstream, a plurality of syntax elements associated with a coding unit, wherein the plurality of syntax elements indicate 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. In some embodiments, disabling palette mode for the coding unit includes: 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：US20240283977A1
公开(公告)日：2024-08-22
申请号：US18651295
申请日：2024-04-30
发明人： Xiaoyu Xiu , Tsung-Chuan Ma , Yi-Wen Chen , Xianglin Wang , Hong-Jheng Jhu , Bing Yu
IPC分类号： H04N19/625 , H04N19/129 , H04N19/176 , H04N19/46
CPC分类号： H04N19/625 , H04N19/129 , H04N19/176 , H04N19/46
摘要： A method for video coding includes determining whether any coding group of a transform block located within a second region has a non-zero coefficient. The transform block comprises a first region and the second region. Further, in accordance with a determination that no coding group of the transform block located within the second region has a non-zero coefficient, the method includes applying respective inverse transforms to transform coefficients of the transform block in horizontal and vertical directions.
-
公开(公告)号：US12069311B2
公开(公告)日：2024-08-20
申请号：US17716971
申请日：2022-04-08
发明人： Xiaoyu Xiu , Yi-Wen Chen , Tsung-Chuan Ma , Hong-Jheng Jhu , Xianglin Wang , Bing Yu
IPC分类号： H04N19/70 , H04N19/12 , H04N19/132 , H04N19/136 , H04N19/174 , H04N19/186 , H04N19/30 , H04N19/60
CPC分类号： H04N19/70 , H04N19/12 , H04N19/132 , H04N19/136 , H04N19/174 , H04N19/186 , H04N19/30 , H04N19/60
摘要： An electronic apparatus performs a method of decoding video data, comprising: receiving, from bitstream, a first syntax element in a slice header of a slice that indicates whether luma mapping with chroma scaling (LMCS) is applied to a coding unit in the slice; receiving a second syntax element for the coding unit that indicates whether the coding unit has been coded using adaptive color-space transform (ACT); if the second syntax element has a non-zero value, decoding the coding unit by applying inverse ACT to convert luma and chroma residuals of the coding unit from a transformed color space to an original color space of the video data; and if the first syntax element has a non-zero value, decoding the coding unit by performing inverse luma mapping to the luma samples and inverse scaling to the chroma residuals of the coding unit after performing the inverse ACT.
-
公开(公告)号：US12063375B2
公开(公告)日：2024-08-13
申请号：US17672556
申请日：2022-02-15
发明人： Yi-Wen Chen , Xiaoyu Xiu , Tsung-Chuan Ma , Hong-Jheng Jhu , Xianglin Wang , Bing Yu
IPC分类号： G06K9/00 , H04N19/107 , H04N19/186 , H04N19/70
CPC分类号： H04N19/186 , H04N19/107 , H04N19/70
摘要： An electronic apparatus performs a method for video decoding. The method comprises: receiving, from a bitstream, a coding unit and determining a mode type condition of the coding unit; if the coding unit is encoded in a first chroma format, setting the mode type condition of the coding unit to a first mode type condition; if the coding unit is encoded in a second chroma format and the coding unit is a smallest chroma intra prediction unit, setting the mode type condition of the coding unit to a second mode type condition if a luma block of the coding unit and the splitting method satisfy a first criterion; setting the mode type condition of the coding unit to a third mode type condition if the luma block of the coding unit and the splitting method satisfy a second criterion, and decoding the coding unit based on the mode type condition.
-
公开(公告)号：US20240223811A1
公开(公告)日：2024-07-04
申请号：US18606849
申请日：2024-03-15
发明人： Xiaoyu Xiu , Ning YAN , Yi-Wen Chen , Che-Wei KUO , Wei CHEN , Hong-Jheng Jhu , Xianglin Wang , Bing Yu
IPC分类号： H04N19/61 , H04N19/132 , H04N19/176 , H04N19/18 , H04N19/196
CPC分类号： H04N19/61 , H04N19/132 , H04N19/176 , H04N19/18 , H04N19/196
摘要： Implementations of the disclosure provide a video decoding apparatus and method for transform coefficient sign prediction on a video decoder side. The method may include generating a plurality of candidate hypotheses for a set of candidate transform coefficients associated with a transform block of a video frame from a video. The method may further include selecting a hypothesis from the plurality of candidate hypotheses as a set of predicted signs for the set of candidate transform coefficients, wherein the hypothesis is selected based on a cost function calculated by extrapolating neighboring samples of the transform block in an extrapolation direction determined based on a dominant gradient direction. The method may also include estimating original signs for the set of candidate transform coefficients based on the set of predicted signs and a sequence of sign signaling bits received from a video encoder.
-
公开(公告)号：US12003729B2
公开(公告)日：2024-06-04
申请号：US17852230
申请日：2022-06-28
发明人： Yi-Wen Chen , Xiaoyu Xiu , Tsung-Chuan Ma , Hong-Jheng Jhu , Xianglin Wang , Bing Yu
IPC分类号： H04N19/132 , H04N19/117 , H04N19/167 , H04N19/172 , H04N19/186 , H04N19/85
CPC分类号： H04N19/132 , H04N19/117 , H04N19/167 , H04N19/172 , H04N19/186 , H04N19/85
摘要： This application is directed to coding video data that includes a plurality of image samples of a video frame. Each image sample corresponds to one of a luma sample and a chroma sample. Each image sample is filtered using an adaptive in-loop filter having a filter length and a set of filter coefficients. A set of related image samples are identified in the filter length of each image sample. For each related image sample, a respective clip value index and a corresponding filter coefficient are identified. A difference of each related image sample and the respective image sample is clipped based on the respective clip value index that corresponds to a respective clipping boundary value equal to 2 to a power of a respective clipping number. The respective image sample is modified with the clipped difference of each of the related image samples based on the respective filter coefficient.
-
公开(公告)号：US11997278B2
公开(公告)日：2024-05-28
申请号：US17702689
申请日：2022-03-23
发明人： Hong-Jheng Jhu , Xiaoyu Xiu , Xianglin Wang , Yi-Wen Chen , Tsung-Chuan Ma , Bing Yu
IPC分类号： H04N19/126 , H04N19/159 , H04N19/186 , H04N19/196
CPC分类号： H04N19/126 , H04N19/159 , H04N19/186 , H04N19/196
摘要： A method for video decoding is provided. The method may be applied in a decoder and includes: receiving a video bitstream comprising a quantization parameter and a quantized level; deriving a scale value by scaling the quantization parameter by a scale factor; determining a plurality of parameters associated with a coding unit (CU); obtaining a plurality of bit-shifts by bit-shifting the plurality of parameters; and obtaining a plurality of coefficients associated with the CU based on the quantized level, the scale value, and the plurality of bit-shifts.
-
公开(公告)号：US11985356B2
公开(公告)日：2024-05-14
申请号：US17558292
申请日：2021-12-21
发明人： Tsung-Chuan Ma , Hong-Jheng Jhu , Xianglin Wang , Yi-Wen Chen , Xiaoyu Xiu , Shuiming Ye , Yun-fei Zheng , Bing Yu
IPC分类号： H04N19/70 , H04N19/159 , H04N19/169 , H04N19/46
CPC分类号： H04N19/70 , H04N19/159 , H04N19/1883 , H04N19/46
摘要： A method of decoding a syntax element for a current coding unit of video data is performed by an electronic apparatus. The electronic apparatus identifies, for the current coding unit, an above coding unit and a coding tree unit including the current coding unit. After determining that the above coding unit is within the coding tree unit, the electronic apparatus decodes, from a video bitstream, a corresponding syntax element for the current coding unit based, at least in part, on a syntax element associated with the above coding unit retrieved from a line buffer associated with the coding tree unit; otherwise, the electronic apparatus decodes, from the video bitstream, the corresponding syntax element for the current coding unit based, at least in part, on a default value assigned to the syntax element associated with the above coding unit.
-
公开(公告)号：US11985311B2
公开(公告)日：2024-05-14
申请号：US17591456
申请日：2022-02-02
发明人： Yi-Wen Chen , Xianglin Wang , Xiaoyu Xiu , Tsung-Chuan Ma , Bing Yu
IPC分类号： H04N19/107 , H04N19/159 , H04N19/176 , H04N19/503 , H04N19/593 , H04N19/70
CPC分类号： H04N19/107 , H04N19/159 , H04N19/176 , H04N19/503 , H04N19/593 , H04N19/70
摘要： A method of decoding video data, comprising: receiving, from bitstream, video data corresponding to a non-skip mode coded block; determining a parameter set associated with the non-skip mode coded block; if the parameter set satisfies a first condition, retrieving a first syntax element from the bitstream; if the parameter set satisfies a second condition, retrieving a second syntax element from the bitstream; if the parameter set satisfies a third condition, retrieving a third syntax element from the bitstream; decoding the video data corresponding to the non-skip mode coded block using palette mode when the first syntax element and the third syntax element have the first value; decoding the video data using intra prediction mode when the first syntax element has the first value and the third syntax element has a second value; and decoding the video data using inter prediction mode when the first syntax element has the second value.
-
-
-
-
-
-
-
-
-
搜索结果
58 条记录 (耗时 0.025 秒)
