公开(公告)号：US5719963A

公开(公告)日：1998-02-17

申请号：US454867

申请日：1995-05-31

申请人： Kimihiko Kazui ,  Kiyoshi Sakai ,  Kiichi Matsuda ,  Akira Nakagawa

发明人： Kimihiko Kazui ,  Kiyoshi Sakai ,  Kiichi Matsuda ,  Akira Nakagawa

IPC分类号： H04N7/30 ,  G06F17/14 ,  G06T1/20 ,  G06T9/00 ,  H03M7/30 ,  H04N1/41 ,  G06K9/20 ,  G06F15/00 ,  G06K9/38

CPC分类号： G06F17/147 ,  G06T9/007

摘要： A two-dimensional discrete cosine transform computing circuit has a transform block, formed by a multiplication unit and a Hadamard transform unit, which performs computations in a sequence of Hadamard transforms followed by multiplications in a two-dimensional discrete cosine transform, and in a sequence of multiplication followed by Hadamard transforms in an inverse two-dimensional discrete cosine transform. A memory block temporarily stores input/output data of the transform block; an input/output processing block performs pre-processing and post-processing such as cumulative addition and subtraction of input/output data of the transform block. A control block controls, when performing processing for either a two-dimensional discrete cosine transform or inverse two-dimensional discrete cosine transform, multiplications of coefficients in the transform block, read/write of the memory block, and the input/output processing block. This configuration achieves high-speed processing and a reduction in scale of the circuitry.

摘要翻译： 二维离散余弦变换计算电路具有由乘法单元和Hadamard变换单元形成的变换块，该单元在Hadamard变换序列中进行计算，随后在二维离散余弦变换中进行乘法，并以序列 的乘法，然后是逆二维离散余弦变换中的Hadamard变换。 存储块临时存储变换块的输入/输出数据; 输入/输出处理块执行诸如变换块的输入/输出数据的累积加法和减法的预处理和后处理。 当执行二维离散余弦变换或反向二维离散余弦变换的处理时，控制块控制变换块中的系数乘法，存储块的读/写和输入/输出处理块。 该配置实现了高速处理和电路规模的缩小。

公开(公告)号：US6104826A

公开(公告)日：2000-08-15

申请号：US948083

申请日：1997-10-09

申请人： Akira Nakagawa ,  Kimihiko Kazui ,  Atsuko Tada ,  Eishi Morimatsu ,  Koich Tanaka

发明人： Akira Nakagawa ,  Kimihiko Kazui ,  Atsuko Tada ,  Eishi Morimatsu ,  Koich Tanaka

IPC分类号： H04N7/08 ,  G06T1/00 ,  H03M7/30 ,  H04N1/32 ,  H04N1/387 ,  H04N7/081 ,  G06K9/00

CPC分类号： H04N19/467 ,  G06T1/0028 ,  H04N1/32154 ,  H04N1/32165 ,  H04N21/23892 ,  H04N21/8358 ,  G06T2201/0052 ,  G06T2201/0083 ,  H04N2201/3233 ,  H04N2201/327

摘要： The present invention relates to methods for watermark-embedding/extracting identification information into/from picture data and apparatuses thereof. When identification information is watermark-embedded, the following steps are performed. Combinations of basis functions orthogonal each other are generated in association with each numerical signal. For each combination of the orthogonal basis functions, a weight coefficient is calculated so as to correspond to the combination of the basis functions by calculating a sum of products of values of the basis functions for pixels in the original picture data and pixel values of the pixels. For each numerical signal, a watermark-embedding function is referred, a input value is specified, and a pixel value is changed. When the identification information is extracted from the picture data, for each weight coefficient, the watermark-embedding function is referred, and the value of the watermark-embedding function is calculated for each weight coefficient.

摘要翻译： 本发明涉及用于将图像数据中的识别信息进行水印嵌入/提取的方法及其装置。 当识别信息嵌入水印时，执行以下步骤。 与每个数字信号相关联地产生彼此正交的基函数的组合。 对于正交基函数的每个组合，通过计算原始图像数据中的像素的基本函数的值和像素的像素的乘积之和来计算权重系数，以便对应于基函数的组合 。 对于每个数字信号，参考水印嵌入功能，指定输入值，并改变像素值。 当从图像数据中提取识别信息时，对于每个权重系数，参照水印嵌入功能，并且针对每个权重系数计算水印嵌入函数的值。

公开(公告)号：US6104434A

公开(公告)日：2000-08-15

申请号：US877508

申请日：1997-06-17

申请人： Akira Nakagawa ,  Kimihiko Kazui ,  Eishi Morimatsu ,  Takahiro Shimizu

发明人： Akira Nakagawa ,  Kimihiko Kazui ,  Eishi Morimatsu ,  Takahiro Shimizu

IPC分类号： H04N19/50 ,  G06T9/00 ,  H03M7/30 ,  H03M7/36 ,  H04N19/107 ,  H04N19/117 ,  H04N19/126 ,  H04N19/13 ,  H04N19/136 ,  H04N19/139 ,  H04N19/15 ,  H04N19/152 ,  H04N19/167 ,  H04N19/176 ,  H04N19/196 ,  H04N19/423 ,  H04N19/503 ,  H04N19/51 ,  H04N19/59 ,  H04N19/61 ,  H04N19/625 ,  H04N19/80 ,  H04N19/86 ,  H04N19/91 ,  H04N7/30

CPC分类号： H04N19/59 ,  H04N19/105 ,  H04N19/117 ,  H04N19/134 ,  H04N19/139 ,  H04N19/152 ,  H04N19/159 ,  H04N19/176 ,  H04N19/196 ,  H04N19/527 ,  H04N19/61 ,  H04N19/82 ,  H04N19/86

摘要： Video coding apparatus and decoding apparatus capable of reproducing decoded pictures without introducing unwanted noises, even if any considerable difference in pixel values or discontinuity exists at a certain block boundary. In a video coding apparatus employing predictive techniques, a dequantizer and an inverse DCT processor reproduce a prediction error signal from quantized transform coefficients. Here, a first resolution conversion unit (or downsampling unit) might have subsampled the original prediction error signal to reduce its picture resolution. If this is the case, a second resolution conversion unit (or upsampling unit) attempts to restore the original resolution of the prediction error signal by applying an upsampling process to the reproduced prediction error signal having the reduced resolution. In this upsampling process, each new pixel value in a certain block are calculated with reference to some surrounding pixels. The upsampling process, however, will not refer to the pixels belonging to any adjacent blocks that are subject to another coding scheme which is different from the coding scheme of the present block of interest. As an alternate arrangement, the upsampling process will entirely neglect the pixels in any other blocks but will refer only to the present block.

摘要翻译： 即使在某个块边界处存在像素值或不连续性的任何相当大的差异，也能够再现解码图像而不引入不需要的噪声的视频编码装置和解码装置。 在采用预测技术的视频编码装置中，去量化器和逆DCT处理器从量化变换系数再现预测误差信号。 这里，第一分辨率转换单元（或下采样单元）可以对原始预测误差信号进行二次采样以降低其图像分辨率。 如果是这种情况，则第二分辨率转换单元（或上采样单元）尝试通过对具有降低的分辨率的再现的预测误差信号应用上采样处理来恢复预测误差信号的原始分辨率。 在该上采样处理中，参考一些周围像素计算某个块中的每个新像素值。 然而，上采样处理将不涉及属于与当前感兴趣块的编码方案不同的另一编码方案的属于任何相邻块的像素。 作为替代布置，上采样处理将完全忽略任何其他块中的像素，但将仅引用当前块。

公开(公告)号：US5737256A

公开(公告)日：1998-04-07

申请号：US505857

申请日：1995-07-24

申请人： Akira Nakagawa ,  Kimihiko Kazui

发明人： Akira Nakagawa ,  Kimihiko Kazui

IPC分类号： G06F17/14 ,  G06T1/20 ,  H03M7/30 ,  H04N1/41 ,  H04N19/42 ,  H04N19/423 ,  H04N19/60 ,  H04N19/625

CPC分类号： G06F17/147

摘要： An 8-point inverse discrete cosine transform (IDCT) is decomposed into four 2-point IDCTs. The four 2-point IDCTs are implemented by four parallel-operating product-sum computing circuits. Each product-sum computing circuit comprises a single multiplying means and accomplishes computation of eight points in four clock cycles. Part of the multiplying means may be implemented by bit shift operation, and others by a semifixed multiplier. A two-dimensional 8.times.8 IDCT circuit is constructed which comprises three semifixed multipliers and one ordinary multiplier, and accomplishes IDCT computation of 8.times.8 points in 64 clock cycles.

摘要翻译： 8点逆离散余弦变换（IDCT）被分解成4个2点IDCT。 四个2点IDCT由四个并行操作乘积和计算电路实现。 每个乘积和计算电路包括单个乘法装置，并且在四个时钟周期内完成八个点的计算。 乘法装置的一部分可以通过位移操作来实现，而另一些乘以半固定乘法器。 构建了一个二维8x8 IDCT电路，它包括三个半定义乘法器和一个普通乘法器，并且在64个时钟周期内完成8×8点的IDCT计算。

公开(公告)号：US09094683B2

公开(公告)日：2015-07-28

申请号：US13602415

申请日：2012-09-04

申请人： Junpei Koyama ,  Akihiro Yamori ,  Kimihiko Kazui ,  Satoshi Shimada ,  Akira Nakagawa

发明人： Junpei Koyama ,  Akihiro Yamori ,  Kimihiko Kazui ,  Satoshi Shimada ,  Akira Nakagawa

IPC分类号： H04N19/00 ,  H04N19/16 ,  H04N19/513 ,  H04N19/107 ,  H04N19/112

CPC分类号： H04N19/16 ,  H04N19/107 ,  H04N19/112 ,  H04N19/513

摘要： A method includes extracting a first vector used to code a specific block belonging to a coded field picture arranged chronologically adjacent to a field picture to be coded and to a block to be coded, generating a second vector by scaling the first vector based on a temporal distance between the field picture and a second picture specified by a reference index and referenced for the block and included in the field picture and a temporal distance between a first picture pointed by the first vector and the coded field picture arranged chronologically adjacent to the field picture, and correcting the second vector based on a parity of the field picture, a parity of the first picture, a parity of the second picture and a parity of the coded field picture and forming the corrected second vector.

摘要翻译： 一种方法包括提取用于对属于按时间顺序排列的编码场图像编码的第一矢量编码与要编码的场图像相邻的块，并且生成第二矢量，通过基于时间 场图像之间的距离和由参考索引指定并被参考并包括在场图像中的第二图像之间的距离以及由第一矢量指向的第一图像与按时间顺序与场图像排列相邻的编码场图像之间的时间距离 并且基于场图像的奇偶校验，第一图像的奇偶校验，第二图像的奇偶校验和编码的场图像的奇偶校验来校正第二矢量，并且形成校正的第二矢量。

公开(公告)号：US08306338B2

公开(公告)日：2012-11-06

申请号：US12171130

申请日：2008-07-10

申请人： Akira Nakagawa ,  Hidenobu Miyoshi ,  Kimihiko Kazui ,  Hisanari Kimura

发明人： Akira Nakagawa ,  Hidenobu Miyoshi ,  Kimihiko Kazui ,  Hisanari Kimura

IPC分类号： G06K9/36

CPC分类号： H04N19/55 ,  H04N19/105 ,  H04N19/107 ,  H04N19/16 ,  H04N19/17 ,  H04N19/174 ,  H04N19/186 ,  H04N19/523

摘要： A moving-picture coding device that performs inter-field motion compensation prediction, includes a reference limit area determining unit that determines to select, for each reference picture, with respect to reference pictures used for coding, a luminance or chrominance reference limit area putting a limit to a reference picture used for generating a prediction picture of a luminance or chrominance of a coding target block belonging to the coding target picture limit area of the case upon each reference picture being previously coded; a selecting inhibit vector determining unit that determines, in a case of coding the coding block belonging to the coding target picture limit area, a selecting inhibit vector that inhibits selecting a luminance and the chrominance are comprised only of pixels of the luminance reference limit area and the chrominance reference limit area.

摘要翻译： 执行场间运动补偿预测的运动图像编码装置包括参考限制区域确定单元，其确定对于每个参考图像，对于用于编码的参考图像，将亮度或色度参考限制区域放入 限制为用于生成属于预先对每个参考图像进行编码的情况的编码对象图像限制区域的编码对象块的亮度或色度的预测图像的参考图像; 选择禁止向量确定单元，其在对编码对象图像限制区域的编码块进行编码的情况下，决定禁止选择亮度和色度的选择禁止矢量，仅包含亮度基准极限区域的像素， 色度参考极限区域。

公开(公告)号：US20100098170A1

公开(公告)日：2010-04-22

申请号：US12588409

申请日：2009-10-14

申请人： Kimihiko Kazui ,  Yoshihiro Terashima ,  Noriaki Tsukuda ,  Akira Nakagawa

发明人： Kimihiko Kazui ,  Yoshihiro Terashima ,  Noriaki Tsukuda ,  Akira Nakagawa

IPC分类号： H04N7/26

CPC分类号： H04N19/40 ,  H04N19/139 ,  H04N19/176 ,  H04N19/433 ,  H04N19/56 ,  H04N19/61

摘要： A transcoding device includes a decoding unit that decodes both motion vectors of macroblocks and images from encoded images in a first encoding format; a first decoded image storing unit that stores therein the decoded motion vectors of macroblocks and the decoded images; a vector searching unit that searches for motion vectors of macroblocks in a second encoding format by using the decoded images stored in the first decoded image storing unit as reference images and by using the decoded motion vectors stored in the first decoded image storing unit; and a motion compensating unit that reads, from the first decoded image storing unit, areas in the decoded images, which are indicated by the motion vectors for which the vector searching unit has searched, and performs motion compensation by using the areas in the decoded images and the motion vectors for which the vector searching unit has searched.

摘要翻译： 代码转换装置包括解码单元，其以第一编码格式对来自编码图像的宏块运动矢量和图像进行解码; 第一解码图像存储单元，其中存储有解码的宏块和解码图像的运动矢量; 矢量搜索单元，通过使用存储在第一解码图像存储单元中的解码图像作为参考图像并通过使用存储在第一解码图像存储单元中的解码运动矢量来搜索第二编码格式的宏块的运动矢量; 以及运动补偿单元，其从第一解码图像存储单元读取由矢量搜索单元搜索的运动矢量指示的解码图像中的区域，并且通过使用解码图像中的区域来执行运动补偿 以及向量搜索单元搜索到的运动矢量。

公开(公告)号：US06282243B1

公开(公告)日：2001-08-28

申请号：US08972362

申请日：1997-11-18

申请人： Kimihiko Kazui ,  Akira Nakagawa ,  Eishi Morimatsu

发明人： Kimihiko Kazui ,  Akira Nakagawa ,  Eishi Morimatsu

IPC分类号： H04N736

CPC分类号： H04N19/523

摘要： A method and apparatus for interframe predictive video coding and decoding which avoid the accumulation of rounding errors and thus obtain high-quality reproduced pictures. A frame memory outputs at least one reference picture to a prediction picture calculation unit, according to motion vector information with half-pel accuracy. From the reference picture(s), the prediction picture calculation unit produces a prediction picture by performing interpolation operations if the motion vector has a half-pel component. Here, each interpolated pel value is rounded off to an integer according to a particular rounding algorithm specified by a calculation controller. More specifically, the prediction picture calculation unit supports a first algorithm that rounds off the pel values toward positive infinity and a second algorithm that rounds off them toward negative infinity. The calculation controller outputs a rounding control signal that directs the prediction picture calculation unit to select either of those two algorithms with substantially equal probabilities of occurrence.

摘要翻译： 一种用于帧间预测视频编码和解码的方法和装置，其避免舍入误差的积累，从而获得高质量的再现图像。 帧存储器根据具有半像素精度的运动矢量信息将至少一个参考图像输出到预测图像计算单元。 如果运动矢量具有半像素分量，则从参考图像中，预测图像计算单元通过执行插值运算来产生预测图像。 这里，每个内插像素值根据由计算控制器指定的特定舍入算法四舍五入为整数。 更具体地，预测图像计算单元支持将像素值向正无穷大舍入的第一算法和将它们向负无穷大舍入的第二算法。 计算控制器输出引导预测图像计算单元选择具有基本上相同的发生概率的那两个算法中的任一个的舍入控制信号。

公开(公告)号：US5825425A

公开(公告)日：1998-10-20

申请号：US754618

申请日：1996-11-21

申请人： Kimihiko Kazui ,  Akira Nakagawa ,  Eishi Morimatsu

发明人： Kimihiko Kazui ,  Akira Nakagawa ,  Eishi Morimatsu

IPC分类号： H04N19/50 ,  H03M7/30 ,  H03M7/36 ,  H04N19/102 ,  H04N19/105 ,  H04N19/107 ,  H04N19/126 ,  H04N19/134 ,  H04N19/137 ,  H04N19/139 ,  H04N19/142 ,  H04N19/167 ,  H04N19/176 ,  H04N19/196 ,  H04N19/423 ,  H04N19/503 ,  H04N19/51 ,  H04N19/61 ,  H04N19/625 ,  H04N19/65 ,  H04N19/67 ,  H04N19/85 ,  H04N19/87 ,  H04N19/91 ,  H04N7/50

CPC分类号： H04N19/152 ,  H04N19/124 ,  H04N19/176 ,  H04N19/61 ,  H04N19/107 ,  H04N19/146

摘要： A device for coding moving pictures includes a coding unit for applying intra-frame coding or inter-frame coding to the of blocks dividing each frame of the moving pictures. The device further includes a refresh-operation-control unit for controlling the coding unit to carry out the intra-frame coding as a refresh operation at predetermined intervals. The refresh-operation-control unit reschedules the predetermined intervals when the coding unit applies the intra-frame coding during one of the predetermined intervals, such that a timing of the intra-frame coding during the one of the predetermined intervals marks a start of a next one of the predetermined intervals.

摘要翻译： 用于编码运动图像的装置包括：编码单元，用于对划分运动图像的每一帧的块应用帧内编码或帧间编码。 该装置还包括刷新操作控制单元，用于控制编码单元以预定间隔执行帧内编码作为刷新操作。 当编码单元在预定间隔期间之一施加帧内编码时，刷新操作控制单元重新调度预定间隔，使得在预定间隔之一期间的帧内编码的定时标记为 下一个预定间隔。

公开(公告)号：US20130044808A1

公开(公告)日：2013-02-21

申请号：US13570566

申请日：2012-08-09

申请人： Akira Nakagawa ,  Kimihiko Kazui ,  Hidenobu Miyoshi ,  Junpei Koyama

发明人： Akira Nakagawa ,  Kimihiko Kazui ,  Hidenobu Miyoshi ,  Junpei Koyama

IPC分类号： H04N7/32

CPC分类号： H04N19/167 ,  H04N19/105 ,  H04N19/13 ,  H04N19/182 ,  H04N19/593

摘要： A encoding device includes a boundary pixel prediction value generation unit, boundary pixel prediction error estimation unit, and a quantized coefficient encoding unit. The boundary pixel prediction value generation unit generates a boundary pixel prediction value as a prediction value of a boundary pixel adjacent to an encoded block in the encoding block from a locally decoded image of a plurality of encoded blocks adjacent to the encoding block. The boundary pixel prediction error estimation unit generates boundary pixel prediction error estimation information from the boundary pixel prediction value and the encoding block prediction image with respect to the boundary pixel. The quantized coefficient encoding unit generates encoding block entropy encoded data from the quantized coefficients and the boundary pixel prediction error estimation information.

摘要翻译： 编码装置包括边界像素预测值生成单元，边界像素预测误差估计单元和量化系数编码单元。 边界像素预测值生成单元从与编码块相邻的多个编码块的局部解码图像生成边界像素预测值作为与编码块中的编码块相邻的边界像素的预测值。 边界像素预测误差估计单元从边界像素预测值和编码块预测图像生成相对于边界像素的边界像素预测误差估计信息。 量化系数编码单元从量化系数和边界像素预测误差估计信息生成编码块熵编码数据。