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公开(公告)号：US10587900B2
公开(公告)日：2020-03-10
申请号：US15433344
申请日：2017-02-15
摘要： System and method embodiments for image coding are disclosed. In an embodiment, a method in a data processing system for image encoding includes determining a sparsity constraint according to a dimension of an input image signal. The method also includes iteratively determining a plurality of approximations to the input image signal. Each iteration provides an approximation of the input image signal. Each approximation includes a set of dictionary element indices and coefficients. The dictionary is an over-complete dictionary. Iterations of the determining step are terminated when a number of iterations is equal to the sparsity constraint. The method also includes selecting one of the plurality of approximations according to a minimum rate-distortion cost. The method also includes determining an encoded image signal according to non-zero coefficients and corresponding indices for each non-zero coefficient in the selected approximation.
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公开(公告)号：US10085028B2
公开(公告)日：2018-09-25
申请号：US14752043
申请日：2015-06-26
发明人： Zhouye Gu , Jianhua Zheng , Nam Ling , Chen-Xiong Zhang
IPC分类号： H04N19/11 , H04N19/147 , H04N19/176 , H04N19/119 , H04N19/597
CPC分类号： H04N19/147 , H04N19/11 , H04N19/119 , H04N19/176 , H04N19/597
摘要： A method for reducing a computational load in high efficiency video coding includes generating a full rate distortion calculation list of selected intra coding modes where the intra coding modes including intra prediction modes and depth modeling modes. A rate distortion cost is determined, with a segment-wise depth coding mode being disabled, for each intra prediction mode in the full rate distortion calculation list and a smallest rate distortion cost intra prediction mode is selected. A rate distortion cost for a particular intra prediction mode is calculated with the segment-wise depth coding mode enabled. After comparison, one of the particular intra prediction mode and the smallest rate distortion cost intra prediction mode having the smallest rate distortion cost is applied to a prediction unit.
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公开(公告)号：US09762914B2
公开(公告)日：2017-09-12
申请号：US15430874
申请日：2017-02-13
发明人： Zhouye Gu , Jianhua Zheng , Nam Ling , Chen-Xiong Zhang
IPC分类号： H04N19/00 , H04N19/13 , H04N19/105 , H04L12/26 , H04N19/122 , H04N19/176 , H04N19/184 , H04N19/96
CPC分类号： H04N19/13 , H04L43/16 , H04N19/105 , H04N19/122 , H04N19/176 , H04N19/184 , H04N19/20 , H04N19/597 , H04N19/63 , H04N19/70 , H04N19/96
摘要： There is disclosed a method, device and computer-readable storage medium for decoding video data. The method includes: obtaining a reference sample array of a video block; obtaining a sum of the reference sample array; calculating a threshold by performing arithmetic right shift to the sum, a shift value of the arithmetic right shift being determined according to size information of the video block; and determining the binary partition pattern by comparing the reference sample array with the threshold.
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公开(公告)号：US10764577B2
公开(公告)日：2020-09-01
申请号：US16664601
申请日：2019-10-25
发明人： Minqiang Jiang , Taru Kanchan , Jianhua Zheng , Nam Ling , Chen-Xiong Zhang
IPC分类号： H04N19/11 , H04N19/139 , H04N19/182 , H04N19/52 , H04N19/159
摘要： Methods, systems, and apparatus, including computer programs encoded on computer storage media, for performing intra coding predictions. An intra-coding process applied to pixels in a frame of media is determined. The intra-coding process is determined whether to corresponding to at least one of most probable modes. In response to determining the intra-coding process does not correspond to the at least one of the most probable modes, four angular prediction modes are extracted from a list of prediction modes. A set of candidates based on the four angular prediction modes are determined. A pre-defined order of the set of candidates is determined, wherein each candidate mode of the set of candidate modes is included in a ranked order and signaled with a particular fixed length coding, and wherein a length of the particular fixed length coding increases based on the pre-defined order of the set of candidate modes.
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公开(公告)号：US10554967B2
公开(公告)日：2020-02-04
申请号：US14664348
申请日：2015-03-20
发明人： Zhouye Gu , Jianhua Zheng , Nam Ling , Chen-Xiong Zhang
IPC分类号： H04N19/105 , H04N19/39 , H04N19/186 , H04N19/112 , H04N19/119 , H04N19/139 , H04N19/182 , H04N19/593 , H04N19/65
摘要： An apparatus comprises a receiver configured to receive video views comprising a reference view and a current view, wherein the reference view comprises a reference block and the current view comprises a current block, and a processor coupled to the receiver and configured to determine neighboring reference pixels associated with the reference block, determine neighboring current pixels associated with the current block, determine a first positional pairing between the neighboring reference pixels and the neighboring current pixels, determine a second positional pairing between the neighboring reference pixels and the neighboring current pixels, and determine an optimal pairing from between the first positional pairing and the second positional pairing.
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公开(公告)号：US10326995B2
公开(公告)日：2019-06-18
申请号：US15640290
申请日：2017-06-30
发明人： Zhouye Gu , Nam Ling , Chen-Xiong Zhang , Jianhua Zheng
IPC分类号： H04B1/66 , H04N19/136 , H04N19/503 , H04N19/154
摘要： System and method embodiments are provided for achieving improved View Synthesis Distortion (VSD) calculation and more accurate distortion estimation of encoded video frames. An embodiment method includes obtaining a depth map value for a video frame and determining a weighting factor for depth distortion in accordance with the depth map value. The weighting factor maps a pixel range of the depth map value to an output function having higher values for closer image objects and lower values for farther image objects. The VSD for the video frame is then calculated as a function of absolute horizontal texture gradients weighted by a depth distortion value and the weighting factor determined in accordance with the depth map value.
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公开(公告)号：US20170310970A1
公开(公告)日：2017-10-26
申请号：US15640290
申请日：2017-06-30
发明人： Zhouye Gu , Nam Ling , Chen-Xiong Zhang , Jianhua Zheng
IPC分类号： H04N19/136 , H04N19/503 , H04N19/154
CPC分类号： H04N19/136 , H04N19/154 , H04N19/503
摘要： System and method embodiments are provided for achieving improved View Synthesis Distortion (VSD) calculation and more accurate distortion estimation of encoded video frames. An embodiment method includes obtaining a depth map value for a video frame and determining a weighting factor for depth distortion in accordance with the depth map value. The weighting factor maps a pixel range of the depth map value to an output function having higher values for closer image objects and lower values for farther image objects. The VSD for the video frame is then calculated as a function of absolute horizontal texture gradients weighted by a depth distortion value and the weighting factor determined in accordance with the depth map value.
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公开(公告)号：US10306266B2
公开(公告)日：2019-05-28
申请号：US15357676
申请日：2016-11-21
发明人： Zhouye Gu , Jianhua Zheng , Nam Ling , Chen-Xiong Zhang
IPC分类号： H04N19/597 , H04N19/176 , H04N19/147 , H04N19/11 , H04N19/124 , H04N19/13 , H04N19/61 , H04N19/172 , H04N19/184
摘要： A method, an apparatus and a decoder for decoding a block of a depth map are provided. An ordered list of decoding modes is obtained, wherein the ordered list of decoding modes comprises a plurality of decoding modes each of which is capable of being used for decoding of the block. A plurality of depth modeling modes (DMMs) each of which is capable of being used for decoding of the block are obtained. And whether a DMM of the plurality of DMMs is to be added into the ordered list of decoding modes in accordance with a decision condition is determined.
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9.发明授权公开(公告)号：US10057586B2
公开(公告)日：2018-08-21
申请号：US14752072
申请日：2015-06-26
发明人： Zhouye Gu , Jianhua Zheng , Nam Ling , Chen-Xiong Zhang
IPC分类号： H04N19/117 , H04N19/182 , H04N19/14 , H04N19/597 , H04N19/543 , H04N19/119 , H04N19/17
CPC分类号： H04N19/182 , H04N19/117 , H04N19/119 , H04N19/14 , H04N19/17 , H04N19/543 , H04N19/597
摘要： Depth based block partitioning in high efficiency video coding is provided by partitioning a video image block into different partitions using a binary segmentation mask. A determination is made whether to filter pixels at a boundary between the partitions. A particular pixel is not filtered in response to each adjacent pixel in vertical and horizontal planes in relation to the particular pixel having a same value. The particular pixel is filtered in response to any adjacent pixel in the vertical and horizontal planes in relation to the particular pixel having a different value than any other adjacent pixel in the vertical and horizontal planes in relation to the particular pixel. Pixels are filtered pursuant to a filtering process in response to a filtering determination.
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公开(公告)号：US20170237991A1
公开(公告)日：2017-08-17
申请号：US15433344
申请日：2017-02-15
IPC分类号： H04N19/172 , H04N19/44 , H04N19/18 , H04N19/147 , H04N19/124
CPC分类号： H04N19/97
摘要： System and method embodiments for image coding are disclosed. In an embodiment, a method in a data processing system for image encoding includes determining a sparsity constraint according to a dimension of an input image signal. The method also includes iteratively determining a plurality of approximations to the input image signal. Each iteration provides an approximation of the input image signal. Each approximation includes a set of dictionary element indices and coefficients. The dictionary is an over-complete dictionary. Iterations of the determining step are terminated when a number of iterations is equal to the sparsity constraint. The method also includes selecting one of the plurality of approximations according to a minimum rate-distortion cost. The method also includes determining an encoded image signal according to non-zero coefficients and corresponding indices for each non-zero coefficient in the selected approximation.
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