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公开(公告)号：EP2153403A1
公开(公告)日：2010-02-17
申请号：EP08757216.0
申请日：2008-06-04
发明人： YU, Xiang , YANG, En-hui , WANG, Haiquan
CPC分类号： G06T3/4084
摘要： A method and device that uses transform matrices to down-sample a DCT image directly in the DCT domain. The transform matrices have been selected to minimize an optimization problem which is a function of the visual quality of down-sampled images obtained using the matrices and the computational complexity associated with using the transform matrices. The transform matrices comprise a row transform matrix and a column transform matrix. A down-sampled image is produced by determining an intermediary matrix as the product of the DCT image and one of either the row transform matrix or the column transform matrix and then determining the down-sampled image as the product of the intermediary matrix and the transform matrix not already used to determine the intermediary matrix.
摘要翻译： 一种使用变换矩阵直接在DCT域中对DCT图像进行下采样的方法和设备。 已选择变换矩阵以最小化优化问题，该优化问题是使用矩阵获得的下采样图像的视觉质量和与使用变换矩阵相关的计算复杂度的函数。 变换矩阵包括行变换矩阵和列变换矩阵。 通过将中间矩阵确定为DCT图像与行变换矩阵或列变换矩阵中的一个的乘积来产生下采样图像，然后将下采样图像确定为中间矩阵和变换的乘积 矩阵尚未用于确定中介矩阵。
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公开(公告)号：EP2526549A1
公开(公告)日：2012-11-28
申请号：EP11734307.9
申请日：2011-01-21
发明人： YU, Xiang , HE, Dake , YANG, En-Hui
CPC分类号： G10L19/12 , G10L2019/0007
摘要： Methods, and corresponding codec-containing devices are provided that have source coding schemes for encoding a component of an excitation. In some cases, the source coding scheme is an enumerative source coding scheme, while in other cases the source coding scheme is an arithmetic source coding scheme. In some cases, the source coding schemes are applied to encode a fixed codebook component of the excitation for a codec employing codebook excited linear prediction, for example an AMR-WB (Adaptive Multi-Rate-Wideband) speech codec.
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3.发明公开METHODS AND DEVICES FOR DATA COMPRESSION WITH ADAPTIVE FILTERING IN THE TRANSFORM DOMAIN 有权方法和数据压缩设备使用自适应滤波转换区域
公开(公告)号：EP2617199A1
公开(公告)日：2013-07-24
申请号：EP11824404.5
申请日：2011-09-14
发明人： YU, Xiang , HE, Dake , YANG, En-hui
IPC分类号： H04N7/50
CPC分类号： H04N19/82 , H04N19/117 , H04N19/136 , H04N19/147 , H04N19/172 , H04N19/18 , H04N19/19 , H04N19/196 , H04N19/463 , H04N19/48 , H04N19/51 , H04N19/61 , H04N19/70
摘要： Methods and devices for encoding and decoding data using adaptive transform domain filtering are described. The encoder determines a set of transform domain filter coefficients to be applied to a transform domain prediction. The filtering may, in some cases, also apply to quantized transform domain coefficients. Rate-distortion optimization may be used to determine the optimal filter coefficients on a frame-based, coding-unit-basis, or other basis.
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4.发明授权METHOD AND DEVICE FOR SELECTING OPTIMAL TRANSFORM MATRICES FOR DOWN-SAMPLING DCT IMAGE 有权方法和装置于选择最优变换的下采样DCT IMAGES OF
公开(公告)号：EP2153405B1
公开(公告)日：2013-04-03
申请号：EP08772773.1
申请日：2008-06-04
发明人： YU, Xiang , YANG, En-hui , WANG, Haiquan
CPC分类号： G06T3/4084 , H04N19/40 , H04N19/48 , H04N19/60
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公开(公告)号：EP2396969A1
公开(公告)日：2011-12-21
申请号：EP10740870.0
申请日：2010-02-12
发明人： YU, Xiang , HE, Dake , YANG, En-Hui
IPC分类号： H04N7/50
CPC分类号： H04N21/2383 , H04N19/117 , H04N19/124 , H04N19/129 , H04N19/13 , H04N19/134 , H04N19/14 , H04N19/154 , H04N19/176 , H04N19/18 , H04N19/82 , H04N19/86 , H04N19/91 , H04N21/4382 , H04N21/8543
摘要： A method and encoder for entropy encoding image data using a dynamically determined coding order, and a method and decoder for entropy decoding encoded data encoded using a dynamically determined coding order. The coding order for encoding quantized transform domain coefficients is dynamically determined for the image based on at least one characteristic of the quantized transform domain coefficients. The characteristic may be quantization step size if non-uniform quantization is employed for blocks of data.
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公开(公告)号：EP2153403B1
公开(公告)日：2013-04-03
申请号：EP08757216.0
申请日：2008-06-04
发明人： YU, Xiang , YANG, En-hui , WANG, Haiquan
CPC分类号： G06T3/4084
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7.发明授权METHOD AND DEVICE FOR SELECTING TRANSFORM MATRICES FOR DOWN-SAMPLING DCT IMAGE USING LEARNING-WITH-FORGETTING ALGORITHM 有权方法和设备选择转换用于下采样DCT图像利用学习与遗忘算法
公开(公告)号：EP2153404B1
公开(公告)日：2013-02-27
申请号：EP08772772.3
申请日：2008-06-04
发明人： YU, Xiang , YANG, En-hui , WANG, Haiquan
CPC分类号： H04N19/625 , G06T3/4084 , H04N19/13 , H04N19/40 , H04N19/48 , H04N19/59 , H04N19/60
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8.发明公开METHOD AND DEVICE FOR SELECTING OPTIMAL TRANSFORM MATRICES FOR DOWN-SAMPLING DCT IMAGE 有权用于选择下采样DCT图像的最优变换矩阵的方法和设备
公开(公告)号：EP2153405A1
公开(公告)日：2010-02-17
申请号：EP08772773.1
申请日：2008-06-04
发明人： YU, Xiang , YANG, En-hui , WANG, Haiquan
CPC分类号： G06T3/4084 , H04N19/40 , H04N19/48 , H04N19/60
摘要： Down-sampling of an image may be performed in the DCT domain. Transform matrices are obtained for down-sampling a DCT image of size M x N to a down-sampled DCT image of size I x J. The transform matrices may be used to down-sample the DCT image directly in the DCT domain. A spatial domain down-sampling method is selected and applied to the DCT image to produce a down-sampled DCT reference image. The transform matrices are selected by solving an optimization problem, leading to transform matrices which achieve a desired trade-off between the visual quality of images obtained using the transform matrices and the computational complexity associated with using the transform matrices. The visual quality is a measure of the difference between the down-sampled DCT image obtained using the transform matrices and the visual quality of the DCT reference image obtained using a spatial domain down-sampling method.
摘要翻译： 可以在DCT域中执行图像的下采样。 获得变换矩阵，用于将尺寸为M×N的DCT图像下采样为尺寸为I×J的下采样的DCT图像。变换矩阵可以用于直接在DCT域中对DCT图像进行下采样。 选择空间域下采样方法并将其应用于DCT图像以产生下采样的DCT参考图像。 通过求解最优化问题来选择变换矩阵，导致变换矩阵，该变换矩阵在使用变换矩阵获得的图像的视觉质量和与使用变换矩阵相关联的计算复杂度之间实现期望的折衷。 视觉质量是使用变换矩阵获得的下采样DCT图像与使用空间域下采样方法获得的DCT参考图像的视觉质量之间的差异的度量。
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公开(公告)号：EP2396771A1
公开(公告)日：2011-12-21
申请号：EP10740869.2
申请日：2010-02-12
发明人： YU, Xiang , HE, Dake , YANG, En-Hui
CPC分类号： H04N19/86 , H04N19/11 , H04N19/117 , H04N19/124 , H04N19/154 , H04N19/176 , H04N19/61 , H04N19/82 , H04N19/91
摘要： Methods and encoders/decoders for applying in-loop deblocking to intra-coded images/frames. In a decoding context, a deblocking filter is applied to reconstructed pixels of an intra-coded block prior to decoding the subsequent block in the decoding sequence. In an encoding context, a deblocking filter is applied to reconstructed pixels of an intra-coded block in an inter-coding loop before encoding a subsequent block in the coding order for the image.
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10.发明公开ADAPTIVE QUANTIZATION WITH BALANCED PIXEL-DOMAIN DISTORTION DISTRIBUTION IN IMAGE PROCESSING 有权随着图像处理平衡像素域失真分布自适应数量化
公开(公告)号：EP2396770A1
公开(公告)日：2011-12-21
申请号：EP10740868.4
申请日：2010-02-12
发明人： YU, Xiang , HE, Dake , YANG, En-Hui
CPC分类号： H04N19/14 , H04N19/124 , H04N19/147 , H04N19/154 , H04N19/18 , H04N19/61
摘要： Methods and encoders and decoders for adaptively quantizing transform domain coefficients in image and/or video encoding/decoding. For an image having a number of blocks, each block having N coefficients, the quantization step size for each coefficient is selected dynamically, thus resulting in a quantizer that may apply different step sizes to different coefficients. The selected step sizes for each coefficient are used for those coefficients within all blocks in the image/frame. In one aspect, the step sizes are selected on the basis of balancing pixel domain distortion when the image/frame is decoded.
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