公开(公告)号：US06687302B2

公开(公告)日：2004-02-03

申请号：US10262934

申请日：2002-10-03

申请人： Yuichiro Nakaya

发明人： Yuichiro Nakaya

IPC分类号： H04N732

CPC分类号： H04N19/54 ,  H04N5/145 ,  H04N19/105 ,  H04N19/109 ,  H04N19/15 ,  H04N19/172 ,  H04N19/176 ,  H04N19/182 ,  H04N19/46 ,  H04N19/51 ,  H04N19/513 ,  H04N19/52 ,  H04N19/527 ,  H04N19/537

摘要： A method of simplifying the arithmetic operation in a global motion compensation process approximates the motion vector field of the whole image without using many parameters. Motion vectors in the global motion compensation are found by the interpolation and/or extrapolation of the motion vectors of a plurality of representative points 602, 603 and 604 having particular features in the spatial distance thereof. Since the shift operation can be substituted for the division for synthesizing a predicted image of global motion compensation, the processing using a computer or a dedicated hardware is simplified.

公开(公告)号：US06594312B1

公开(公告)日：2003-07-15

申请号：US09652956

申请日：2000-08-31

申请人： Richard W. Webb

发明人： Richard W. Webb

IPC分类号： H04N732

CPC分类号： H04N19/90 ,  H04N19/53

摘要： A method and apparatus that reduce the complexity of motion estimation while providing better quality for a particular level of reduced resolution than previously available are described. The method and apparatus involve motion estimation quantization dithering to avoid quantization error effects when reducing the resolution, for example, from eight-bit pixel intensity values to two-bit pixel intensity values. Consequently, an embodiment of the invention provides efficient motion estimation using statistically accurate reduced resolution representations.

摘要翻译： 描述了降低运动估计的复杂度的方法和装置，同时为比以前可用的特定降低分辨率水平提供更好的质量。 该方法和装置涉及当降低分辨率（例如，从8位像素强度值到2位像素强度值）时的运动估计量化抖动以避免量化误差效应。 因此，本发明的实施例使用统计学上精确的降低分辨率表示来提供有效的运动估计。

公开(公告)号：US06516031B1

公开(公告)日：2003-02-04

申请号：US09084504

申请日：1998-05-27

申请人： Kazuya Ishihara ,  Atsuo Hanami ,  Tetsuya Matsumura ,  Satoshi Kumaki ,  Hiroshi Segawa ,  Yoshinori Matsuura ,  Stefan Scotzniovsky

发明人： Kazuya Ishihara ,  Atsuo Hanami ,  Tetsuya Matsumura ,  Satoshi Kumaki ,  Hiroshi Segawa ,  Yoshinori Matsuura ,  Stefan Scotzniovsky

IPC分类号： H04N732

CPC分类号： H04N5/145 ,  G06T7/231 ,  G06T2200/28 ,  G06T2207/10016

摘要： Element processors (PE00 to PE33) included in a processor array (7) store pixel values of a search window, shifting them forward. Further, only hatched element processors (PE00, PE02, PE11, PE13, PE20, PE22, PE31, PE33) store pixel values of a template block, and compare them with the pixel values in the search to evaluate a similarity of pixel values. In other words, the pixel values of the template block are skipped and the pixel values which are left after skipping are compared. Therefore, it is possible to cut a hardware volume.

摘要翻译： 包含在处理器阵列（7）中的元件处理器（PE00至PE33）存储搜索窗口的像素值，将它们向前移位。 此外，只有阴影元素处理器（PE00，PE02，PE11，PE13，PE20，PE22，PE31，PE33）存储模板块的像素值，并将其与搜索中的像素值进行比较，以评估像素值的相似度。 换句话说，跳过模板块的像素值，并比较跳过之后留下的像素值。 因此，可以削减硬件容量。

公开(公告)号：US06445741B1

公开(公告)日：2002-09-03

申请号：US09843430

申请日：2001-04-26

申请人： Erwin B. Bellers ,  Gerard De Haan

发明人： Erwin B. Bellers ,  Gerard De Haan

IPC分类号： H04N732

CPC分类号： H04N19/587 ,  H04N19/132 ,  H04N19/51

摘要： In a method of estimating motion vectors from subsampled video data (I), first vectors are estimated (ME, PM2) between an image with a first sub-sampling phase and an earlier image sub-sampled with a second sub-sampling phase, second vectors are estimated (ME, PM1) between an image with a second sub-sampling phase and an earlier image sub-sampled with a first subsampling phase, and the first and second vectors are combined (CD) to obtain output motion vectors (MV).

摘要翻译： 在从二次采样视频数据（I）估计运动矢量的方法中，在具有第一子采样相位的图像和用第二子采样相位二次采样的较早图像之间估计第一矢量（ME，PM2），第二矢量 在具有第二子采样相位的图像与用第一子采样相位进行子采样的较早图像之间估计矢量（ME，PM1），并且组合第一和第二矢量以获得输出运动矢量（MV） 。

公开(公告)号：US06256346B1

公开(公告)日：2001-07-03

申请号：US09334769

申请日：1999-06-16

申请人： Noboru Yamaguchi ,  Toshiaki Watanabe ,  Takashi Ida

发明人： Noboru Yamaguchi ,  Toshiaki Watanabe ,  Takashi Ida

IPC分类号： H04N732

CPC分类号： G06T3/40 ,  G06T3/4084 ,  H04N19/124 ,  H04N19/129 ,  H04N19/132 ,  H04N19/146 ,  H04N19/152 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/187 ,  H04N19/196 ,  H04N19/30 ,  H04N19/36 ,  H04N19/46 ,  H04N19/48 ,  H04N19/61 ,  H04N19/619

摘要： An encoding apparatus includes an encoder for encoding an alpha-map signal for discriminating a background from an object of an input picture in motion compensation prediction (MV)+transform encoding which uses MV in a domain of each of N×N transform coefficients (n), a transform circuit for transforming Pf into n in accordance with the alpha-map signal, an inverse transform circuit for reconstructing Pf by inversely transforming n in accordance with the alpha-map signal, a selector for obtaining a motion compensation prediction value (p) in the mth layer (m=2 to M) by switching p in the mth layer and p in the (m−1)th layer for each n, the selector selecting p in the mth layer for n by which a quantized output (Q) in the (m−1)th layer is 0 and selecting p in the (m−1)th layer for n by which Q=1 or more, an adder for calculating a difference df between a prediction error signal in the mth layer and a dequantized output in the (m−1)th layer, and an encoder for encoding and outputting the quantized signal of df. This encoding apparatus realizes SNR scalability in M layers.

摘要翻译： 编码装置包括编码器，用于对运动补偿预测（MV）+变换编码中的每个N×N变换系数（n）的MV使用的MV进行编码，用于区分来自输入图像的对象的背景的阿尔法 - 用于根据阿尔法 - 映射信号将Pf变换为n的变换电路，用于通过根据阿尔法 - 映射信号逆变换n来重建Pf的逆变换电路，用于获得运动补偿预测值（p）的选择器 通过在第m层切换第m层（m = 2至M），并且对于每个n，在第（m-1）层中选择p，选择器选择在第m层中的n，其中量化输出（Q） 在第（m-1）层为0并且在第（m-1）层中选择p为Q = 1或更大的n的加法器，用于计算第m层中的预测误差信号和 第（m-1）层中的去量化输出和用于编码和输出的编码器 df的量化信号。 该编码装置实现M层中的SNR可伸缩性。

公开(公告)号：US06501793B2

公开(公告)日：2002-12-31

申请号：US09855541

申请日：2001-05-16

申请人： Sheng Mei Shen ,  Thiow Keng Tan

发明人： Sheng Mei Shen ,  Thiow Keng Tan

IPC分类号： H04N732

CPC分类号： H04N19/59 ,  H04N19/124 ,  H04N19/126 ,  H04N19/13 ,  H04N19/132 ,  H04N19/14 ,  H04N19/154 ,  H04N19/162 ,  H04N19/176 ,  H04N19/18 ,  H04N19/30 ,  H04N19/46 ,  H04N19/60 ,  H04N19/61 ,  H04N19/91

摘要： A method of generating a quantization matrix that is used in an inverse quantization step is provided. An end code that indicates an ending of the coded truncated quantization matrix, in a bitstream is detected. The coded truncated quantization matrix is extracted until the end code is encountered. The extracted—coded truncated quantization matrix is decoded into a one dimensional array that comprises elements of a truncated quantization matrix. The one dimensional array is converted into a two dimensional array that comprises elements of the truncated quantization matrix in a zigzag scanning order. The quantization matrix is generated using the two dimensional array.

摘要翻译： 提供一种生成在逆量化步骤中使用的量化矩阵的方法。 检测在比特流中指示编码截断的量化矩阵的结束的结束代码。 提取编码的截断量化矩阵直到遇到代码。 提取编码的截断量化矩阵被解码成包括截断量化矩阵的元素的一维阵列。 一维阵列被转换为二维阵列，其包括以Z字形扫描顺序的截断量化矩阵的元素。 使用二维阵列生成量化矩阵。

公开(公告)号：US06289049B1

公开(公告)日：2001-09-11

申请号：US09065575

申请日：1998-04-24

申请人： Hyun Mun Kim ,  Jong Beom Ra ,  Sung Deuk Kim ,  Young Su Lee

发明人： Hyun Mun Kim ,  Jong Beom Ra ,  Sung Deuk Kim ,  Young Su Lee

IPC分类号： H04N732

CPC分类号： H04N19/517 ,  H04N19/51

摘要： A method for coding a motion vector in a moving picture reduces overall bit rates in a process of moving picture coding includes searching a motion vector prediction candidate for a first block among a plurality of blocks in a macroblock, searching a plurality of motion vector prediction candidates for each of additional blocks in the plurality of blocks in succession upon completion of the search for the plurality of motion vector prediction candidates for the first block. A motion vector median prediction value for the first block is compared to a motion vector bound. If the motion vector median prediction value is determined to lie within a motion vector bound, a predicted value for coding the first block is determined to be the motion vector median prediction value. If it is determined that the motion vector median prediction value does not lie within the motion vector bound, a vector value that lies within the bound of a motion vector prediction candidate among the plurality of motion vector prediction candidate or the motion vector median prediction value is determined to be the predicted value for coding the first block. The steps of comparing a motion vector median prediction value to the motion vector bound and determining a predicted value is repeated for each of the additional blocks in the plurality of blocks in the macroblock.

摘要翻译： 用于编码运动图像中的运动矢量的方法在运动图像编码的处理中减少总比特率，包括在宏块中搜索多个块中的第一块的运动矢量预测候选，搜索多个运动矢量预测候选 对于针对第一块的多个运动矢量预测候选的搜索完成时，连续地对多个块中的每个附加块进行分析。 将第一块的运动矢量中值预测值与运动矢量进行比较。 如果运动矢量中值预测值被确定为位于运动矢量界限内，则将第一块编码的预测值确定为运动矢量中值预测值。 如果确定运动矢量中值预测值不在运动矢量界限内，则位于多个运动矢量预测候选或运动矢量中值预测值之间的运动矢量预测候补的范围内的矢量值是 被确定为用于对第一块进行编码的预测值。 对于宏块中的多个块中的每个附加块，重复比较运动矢量中值预测值与限定的运动矢量并确定预测值的步骤。

公开(公告)号：US06285710B1

公开(公告)日：2001-09-04

申请号：US08571044

申请日：1995-12-12

申请人： Robert Norman Hurst, Jr. ,  Jungwoo Lee

发明人： Robert Norman Hurst, Jr. ,  Jungwoo Lee

IPC分类号： H04N732

CPC分类号： H04N5/21 ,  H04N19/124 ,  H04N19/126 ,  H04N19/503 ,  H04N19/61 ,  H04N19/82 ,  H04N19/85

摘要： Video signal compression apparatus generates residues representing pixel value differences between predicted and real pixel values of a current frame of a video signal. Noise reduction circuitry, in the form of nonlinear processing functions, attenuates lower amplitude residues greater than higher amplitude residues and is responsive to a noise estimate. The processed residues are transformed to provide a compressed video data output. The nonlinear processing functions attenuate noise and reduce image distortion.

摘要翻译： 视频信号压缩装置产生表示视频信号的当前帧的预测像素值和实际像素值之间的像素值差的残差。 以非线性处理功能形式的降噪电路衰减大于较高振幅残差的较低振幅残差，并对噪声估计作出响应。 经处理的残留物被转换以提供压缩的视频数据输出。 非线性处理功能衰减噪声并减少图像失真。

公开(公告)号：US06266371B1

公开(公告)日：2001-07-24

申请号：US08735319

申请日：1996-10-25

申请人： Tetsujiro Kondo

发明人： Tetsujiro Kondo

IPC分类号： H04N732

CPC分类号： H04N5/145 ,  G06T7/238 ,  G06T2207/10016 ,  H04N19/51

摘要： A motion vector is detected between a base block of a present frame and an inspection block of a reference frame, which is moved in a predetermined search range of the reference frame, on the basis of constant and transient components extracted from the base and inspection blocks. The constant (low frequency) component may be the mean value of the pixels of the block. The transient (high frequency) component may be the standard deviation of the pixels of the block. The base and inspection blocks may be respectively segmented into small blocks, and the constant and transient components of the small blocks obtained, compared and summed.

摘要翻译： 基于从基座和检查块提取的恒定和瞬态分量，在当前帧的基本块和参考帧的检查块之间检测运动矢量，该参考帧在参考帧的预定搜索范围内移动 。 恒定（低频）分量可以是块的像素的平均值。 瞬态（高频）分量可以是块的像素的标准偏差。 基座和检查块可以分别分成小块，并且获得的小块的恒定和瞬态分量，比较和求和。

公开(公告)号：US06256348B1

公开(公告)日：2001-07-03

申请号：US08706161

申请日：1996-08-30

申请人： Frank L. Laczko ,  Yetung Paul Chiang

发明人： Frank L. Laczko ,  Yetung Paul Chiang

IPC分类号： H04N732

CPC分类号： H04N19/00 ,  H04N5/14 ,  H04N5/445 ,  H04N19/42 ,  H04N19/428 ,  H04N19/51 ,  H04N19/61 ,  H04N19/70

摘要： A video decoder having an input buffer for receiving an encoded and compressed data stream, parsing circuitry for removing header information from said data stream, circuitry for decoding said data stream, circuitry for decompressing said data stream, circuitry for selecting predetermined portions of preselected frames, memory for storing said decompressed data stream and selected portions of said preselected frames, and circuitry for reconstructing selected portions of said preselected frames is provided.

摘要翻译： 一种具有用于接收编码和压缩数据流的输入缓冲器的视频解码器，用于从所述数据流中移除标题信息的解析电路，用于解码所述数据流的电路，用于解压缩所述数据流的电路，用于选择预选帧的预定部分的电路， 提供用于存储所述解压缩数据流和所述预选帧的选定部分的存储器，以及用于重构所述预选帧的选定部分的电路。