公开(公告)号：US06636641B1

公开(公告)日：2003-10-21

申请号：US09458061

申请日：1999-12-10

申请人： Tomohiro Kimura ,  Ikuro Ueno ,  Taichi Yanagiya ,  Masayuki Yoshida ,  Fumitaka Ono ,  Narihiro Matoba ,  Kunio Ueda

发明人： Tomohiro Kimura ,  Ikuro Ueno ,  Taichi Yanagiya ,  Masayuki Yoshida ,  Fumitaka Ono ,  Narihiro Matoba ,  Kunio Ueda

IPC分类号： G06K900

CPC分类号： H04N1/41 ,  H04N19/13 ,  H04N19/137 ,  H04N19/182 ,  H04N19/423 ,  H04N19/593

摘要： By combining a plurality of encoding methods actively, an encoding efficiency is enhanced. The first encoder encodes a result of determination whether a prediction error is zero or not. The second encoder encodes the prediction error unless the prediction error is zero. The third encoder encodes the prediction error regardless of whether the prediction error is zero or not. The mode determinator determines the encoding mode, and the encoding controller selectively operates the first encoder, the second encoder, and the third encoder according to the encoding mode determined.

摘要翻译： 通过积极地组合多种编码方式，提高了编码效率。 第一编码器对预测误差是否为零的确定结果进行编码。 第二编码器编码预测误差，除非预测误差为零。 无论预测误差是否为零，第三编码器对预测误差进行编码。 模式确定器确定编码模式，并且编码控制器根据确定的编码模式选择性地操作第一编码器，第二编码器和第三编码器。

公开(公告)号：US06744925B2

公开(公告)日：2004-06-01

申请号：US09995661

申请日：2001-11-29

申请人： Tomohiro Kimura ,  Ikuro Ueno ,  Taichi Yanagiya ,  Masayuki Yoshida ,  Fumitaka Ono ,  Narihiro Matoba ,  Kunio Ueda

发明人： Tomohiro Kimura ,  Ikuro Ueno ,  Taichi Yanagiya ,  Masayuki Yoshida ,  Fumitaka Ono ,  Narihiro Matoba ,  Kunio Ueda

IPC分类号： G06K900

CPC分类号： H04N1/41 ,  H04N19/13 ,  H04N19/157 ,  H04N19/593

摘要： Encoding efficiency is enhanced by actively combining a plurality of encoding methods. A picture element memory receives and stores picture elements within a predetermined range. A mode determinator selects an encoding mode based upon a reference picture element. A first encoding section and a second encoding section predicts the value of the encoded picture element, determines whether the prediction is correct, and then encodes the value of the encoding picture element based on the determination result and outputs a codeword for the encoding picture element. An encoding controller selectively operates the first encoding section and the second encoding section based upon one of the specific encoding modes and the other encoding mode other than the specific encoding mode selected by the mode determinator.

公开(公告)号：US06411231B1

公开(公告)日：2002-06-25

申请号：US09275006

申请日：1999-03-24

申请人： Taichi Yanagiya ,  Tomohiro Kimura ,  Ikuro Ueno ,  Masayuki Yoshida ,  Fumitaka Ono

发明人： Taichi Yanagiya ,  Tomohiro Kimura ,  Ikuro Ueno ,  Masayuki Yoshida ,  Fumitaka Ono

IPC分类号： H03M700

CPC分类号： H03M7/4006

摘要： In an adaptive probability estimation method, an index referring to coding parameters is determined according to occurrence probabilities of symbols from estimated occurrence counts of symbols, thresholds for probability values that determine the probability intervals corresponding to the indexes are set to values that are examined with small operational load, and an index referring to the corresponding occurrence probability is selected without division, using the probability intervals determined by the thresholds for probability values.

摘要翻译： 在自适应概率估计方法中，根据来自估计的符号发生次数的符号的出现概率来确定参照编码参数的索引，确定与索引对应的概率间隔的概率值的阈值被设置为小的检查值 使用由概率值的阈值确定的概率间隔来选择参考相应出现概率的索引而不分割。

公开(公告)号：US5991449A

公开(公告)日：1999-11-23

申请号：US680053

申请日：1996-07-15

申请人： Tomohiro Kimura ,  Ikuro Ueno ,  Taichi Yanagiya ,  Masayuki Yoshida ,  Fumitaka Ono ,  Naoto Tanabe

发明人： Tomohiro Kimura ,  Ikuro Ueno ,  Taichi Yanagiya ,  Masayuki Yoshida ,  Fumitaka Ono ,  Naoto Tanabe

IPC分类号： H04N19/102 ,  G06T9/00 ,  H03M7/36 ,  H04N1/41 ,  H04N19/103 ,  H04N19/134 ,  H04N19/136 ,  H04N19/137 ,  H04N19/182 ,  H04N19/189 ,  H04N19/192 ,  H04N19/196 ,  H04N19/423 ,  H04N19/426 ,  H04N19/50 ,  H04N19/85 ,  H04N19/91 ,  G06K9/36

CPC分类号： H04N19/593

摘要： An image memory outputs a target encoding pixel and a plurality of reference pixels in the vicinity thereof. A boundary mode determining unit determines a maximum value and a minimum value of the reference pixels, determines an average value of the maximum value and the minimum value, compares the respective reference pixel values with the average value, detects a boundary in the target encoding pixel and the reference pixels based on comparison results, and detects a pixel distribution state of the reference pixels based on the detected boundary. An adaptive predictor calculates a prediction value by performing a calculation based on a function corresponding to the pixel distribution state and the reference pixels. A prediction difference calculating unit determines a difference value between the prediction value and a value of the target encoding pixel. A prediction coincidence determining unit compares the prediction value and the target encoding pixel value, and outputs a comparison result as a binary signal. A context generator generates a context based on the pixel distribution state and the difference value of the prediction difference calculating unit. An arithmetic encoder encodes the binary signal based on the context thus generated.

摘要翻译： 图像存储器输出其附近的目标编码像素和多个参考像素。 边界模式确定单元确定参考像素的最大值和最小值，确定最大值和最小值的平均值，将各个参考像素值与平均值进行比较，检测目标编码像素中的边界 和基于比较结果的参考像素，并且基于检测到的边界来检测参考像素的像素分布状态。 自适应预测器通过基于与像素分布状态和参考像素对应的功能进行计算来计算预测值。 预测差分计算单元确定预测值和目标编码像素的值之间的差值。 预测符号确定单元将预测值和目标编码像素值进行比较，并输出比较结果作为二进制信号。 上下文生成器基于像素分布状态和预测差分计算单元的差值来生成上下文。 算术编码器根据这样生成的上下文对二进制信号进行编码。

公开(公告)号：US06188793B1

公开(公告)日：2001-02-13

申请号：US08952723

申请日：1997-11-19

申请人： Tomohiro Kimura ,  Ikuro Ueno ,  Taichi Yanagiya ,  Masayuki Yoshida ,  Fumitaka Ono ,  Narihiro Matoba ,  Kunio Ueda

发明人： Tomohiro Kimura ,  Ikuro Ueno ,  Taichi Yanagiya ,  Masayuki Yoshida ,  Fumitaka Ono ,  Narihiro Matoba ,  Kunio Ueda

IPC分类号： G06K900

CPC分类号： H04N1/41 ,  H04N19/12 ,  H04N19/14 ,  H04N19/182 ,  H04N19/593 ,  H04N19/93

摘要： By combining a plurality of encoding methods actively, an encoding efficiency is enhanced. The first encoder encodes a result of determination whether a prediction error is zero or not. The second encoder encodes the prediction error unless the prediction error is zero. The third encoder encodes the prediction error regardless of whether the prediction error is zero or not. The mode determinator determines the encoding mode, and the encoding controller selectively operates the first encoder, the second encoder, and the third encoder according to the encoding mode determined.

摘要翻译： 通过积极地组合多种编码方式，提高了编码效率。 第一编码器对预测误差是否为零的确定结果进行编码。 第二编码器编码预测误差，除非预测误差为零。 无论预测误差是否为零，第三编码器对预测误差进行编码。 模式确定器确定编码模式，并且编码控制器根据确定的编码模式选择性地操作第一编码器，第二编码器和第三编码器。

公开(公告)号：US6075471A

公开(公告)日：2000-06-13

申请号：US41134

申请日：1998-03-12

申请人： Tomohiro Kimura ,  Fumitaka Ono ,  Ikuro Ueno ,  Taichi Yanagiya ,  Masayuki Yoshida

发明人： Tomohiro Kimura ,  Fumitaka Ono ,  Ikuro Ueno ,  Taichi Yanagiya ,  Masayuki Yoshida

IPC分类号： H04N19/00 ,  H03M7/30 ,  H03M7/40 ,  H04N1/413 ,  H04N19/423 ,  H04N19/91 ,  H03M7/00

CPC分类号： H03M7/4006

摘要： An adaptive coding method is comprised of: a fourth step (508), (510) for calculating an occurrence frequency of either the more probable symbol (MPS) or the less probable symbol (LPS) with respective to the entered input; a fifth step (511) for comparing an occurrence time accumulated value calculated as the occurrence frequency at the fourth step with a preselected value (threshold value), and for reducing the occurrence time accumulated value by 1/2 in the case that the occurrence time accumulated value reaches the preselected value (threshold value); and a sixth step (513) for defining the more probable symbol (MPS) and the less probable symbol (LPS) in correspondence with a predetermined region on a numerical line with respect to the data signal to thereby output coordinate values on the numerical line as a corded word.

摘要翻译： 自适应编码方法包括：第四步骤（508），（510），用于相应于输入的输入计算更可能符号（MPS）或较小可能符号（LPS）的出现频率; 第五步骤（511），用于将作为第四步骤的出现频率计算的出现时间累积值与预选值（阈值）进行比较，并且将发生时间累加值减少+ E，将1/2 + EE 发生时间累积值达到预选值（阈值）的情况; 以及第六步骤（513），用于与数据信号上的数字行上的预定区域相对应地定义更可能的符号（MPS）和较少的可能符号（LPS），从而在数字线上输出坐标值作为 一个有用的词