公开(公告)号：US4969039A

公开(公告)日：1990-11-06

申请号：US213534

申请日：1988-06-30

申请人： Toshio Koga ,  Junichi Ohki ,  Mutsumi Ohta ,  Yoshihiro Miyamoto ,  Hideto Kunhiro

发明人： Toshio Koga ,  Junichi Ohki ,  Mutsumi Ohta ,  Yoshihiro Miyamoto ,  Hideto Kunhiro

IPC分类号： G06T9/00 ,  H04N5/85 ,  H04N5/926 ,  H04N7/26 ,  H04N7/36

CPC分类号： H04N19/142 ,  H04N19/179 ,  H04N19/503 ,  H04N19/87 ,  H04N5/9262 ,  H04N5/85

摘要： In an image processing system for use in processing a sequence of image signals carrying a moving image, the image signal sequence is divided into a sequence of partial image signals each of which carries a scene subsequence defined by scene changes. A background signal generator determines a background portion of the moving image by monitoring a whole of each partial image signal and produces a background signal. The background signal is coded by a coder prior to a sequence of error signals resulting from predictive coding of each partial signal. During prediction of the background signal, the error signals may be rendered to zero in the coder. The background signal may be either determined at every picture element or at every block composed of a plurality of picture elements.

摘要翻译： 在用于处理携带运动图像的图像信号的序列的图像处理系统中，图像信号序列被划分为每个部分图像信号的序列，每个部分图像信号携带由场景变化定义的场景子序列。 背景信号发生器通过监视每个部分图像信号的整体来确定运动图像的背景部分并产生背景信号。 在由每个部分信号的预测编码产生的误差信号序列之前，由编码器对背景信号进行编码。 在背景信号的预测期间，可以在编码器中使误差信号变为零。 可以在每个图像元素处或在由多个图像元素组成的每个块处确定背景信号。

公开(公告)号：US4942476A

公开(公告)日：1990-07-17

申请号：US189138

申请日：1988-05-02

申请人： Toshio Koga ,  Junichi Ohki ,  Mutsumi Ohta ,  Hideto Kunihiro

发明人： Toshio Koga ,  Junichi Ohki ,  Mutsumi Ohta ,  Hideto Kunihiro

IPC分类号： H04N5/92 ,  G11B20/10 ,  H04N5/85 ,  H04N5/926

CPC分类号： H04N5/9262 ,  H04N5/85

摘要： In a recording system, a sequence of image signals obtained from a sequence of images are used to generate and record a sequence of recordable signals on a read only memory. Efficient coding of the received sequence of image signals is carried out through the use of a given parameter which is adaptively and dynamically changed, preferably manually, through a parameter controller acting as the interactive device. The image signals are repeatedly subjected to the efficient coding process. The process uses a sequence of predictive signals to produce coded signals. The predictive signals are displayed on a monitor display device to be monitored by an operator. The operator changes the attributes of the parameter until an optimum image is obtained. The optimum parameter is stored on a magnetic tape. The image signals subjected to the efficient coding enable the production of a sequence of coded image signals which are recorded on the read only memory in synchronism with the optimum parameter, after the optimum image has been obtained.

摘要翻译： 在响应于一系列图像信号以在主图像记录介质上记录一系列记录信号的记录系统中，通过使用通过参数控制器自适应地从一个到另一个改变的参数来执行有效的编码 35）作为人机交互设备。 参考一系列预测值信号V（i），将图像信号重复地提供给记录系统以进行有效编码。 预测值信号显示在监视器显示装置（37）上，由操作者监视。 操作人员可以通过使用最佳参数，观看显示设备，将参数从一个改变到另一个直到显示最佳图像。 最佳参数在磁带（36）上发送。 在获得最佳图像之后，将图像信号经受有效编码成与记录在主图像记录介质上的编码图像信号序列同步的最佳参数。

公开(公告)号：US4985782A

公开(公告)日：1991-01-15

申请号：US189145

申请日：1988-05-02

申请人： Toshio Koga ,  Junichi Ohki ,  Mutsumi Ohta ,  Hideto Kunihiro

发明人： Toshio Koga ,  Junichi Ohki ,  Mutsumi Ohta ,  Hideto Kunihiro

IPC分类号： H04N5/92 ,  G11B20/10 ,  H04N5/85 ,  H04N5/926 ,  H04N5/93

CPC分类号： H04N5/93 ,  H04N5/9262 ,  H04N5/85

摘要： In a reproduction system for use in reproducing a still image from a sequence of predictive error signals which is read out of a memory and which is preliminarily processed into a sequence of preliminary processed signals, an intermediate circuit interrupts the preliminary processed signals in response to an external command signal. In the intermediate circuit, the external command signal is resampled by a sequence of frame pulses in a resampling circuit into a resampled signal so as to close a gate circuit. No predictive error signal is sent to an adder circuit during absence of the gate circuit. An identical error signal is repeatedly produced as a sequence of reproduced signals to reproduce the still image.

摘要翻译： 在从存储器读出并预先处理为预处理信号序列的预测误差信号序列中再现静止图像的再现系统中，中间电路（31）中断预处理信号 对外部命令信号的响应。 在中间电路中，外部命令信号通过重采样电路（34）中的帧脉冲序列重采样为重采样信号，以闭合栅极电路（35）。 在门电路不存在期间，没有预测误差信号发送到加法电路（18）。 重复产生相同的误差信号作为再现信号的序列以再现静止图像。

公开(公告)号：US4931879A

公开(公告)日：1990-06-05

申请号：US189249

申请日：1988-05-02

申请人： Toshio Koga ,  Junichi Ohki ,  Mutsumi Ohta ,  Hideto Kunihiro

发明人： Toshio Koga ,  Junichi Ohki ,  Mutsumi Ohta ,  Hideto Kunihiro

IPC分类号： G06T9/00 ,  G11B27/034 ,  G11B27/10 ,  G11B27/30 ,  G11B27/32 ,  H04N5/783 ,  H04N5/85 ,  H04N5/926 ,  H04N7/32 ,  H04N7/36

CPC分类号： H04N19/124 ,  G11B27/105 ,  H04N19/50 ,  H04N19/503 ,  H04N5/9262 ,  G11B2220/213 ,  G11B2220/2545 ,  G11B27/034 ,  G11B27/3027 ,  G11B27/329 ,  H04N5/783 ,  H04N5/85

摘要： In an image recording system for use in recording a sequence of coded signals on a recording medium, such as a CD-ROM in response to a sequence of image signals divisible into a succession of frames each of which is subdivided into a plurality of splits, the image signals are selectively subjected to interframe coding and intraframe coding in a coder to be coded into first and second error signals, respectively, under control of a coding control circuit. The intraframe coding may be carried out about a selected split at every frame, at every preselected period, or at predetermined positions of each scene. The second and the first error signals are rearranged into the coded signals by delaying the second error signal relative to the first error signal. Such a second error signal serves to reproduce an initial image on reproducing the coded signals and enables a reverse reproduction, a quick search, a high speed reproduction, and the like in a reproducing system.

公开(公告)号：US06470090B2

公开(公告)日：2002-10-22

申请号：US10072596

申请日：2002-02-06

申请人： Ryoma Oami ,  Yoshihiro Miyamoto ,  Mutsumi Ohta

发明人： Ryoma Oami ,  Yoshihiro Miyamoto ,  Mutsumi Ohta

IPC分类号： G06K900

CPC分类号： G06T1/0028 ,  G06T1/005 ,  G06T2201/0202

摘要： The present invention relates to a digital watermark insertion system that automatically calculates a digital watermark strength suitable to an input image and inserts a digital watermark into the image. The image categorizing section 103 classifies input images and outputs category indexes. The storage device 101 stores digital watermark characteristic tables describing the correspondences between digital watermark strength, image-quality degradation degree and attack-resistant evaluation value by category index and selects a digital watermark characteristic table to be used according to an input category index. The digital watermark strength calculation section 100 outputs a digital watermark strength to the storage device, calculates an optimum digital watermark strength using an image-quality degradation degree and a resistant evaluation value output from the storage device 103 and constraint information input by an user. The digital watermark insertion section converts embedded data into a digital watermark and inserts the digital watermark in an input image with the strength of an input optimum digital watermark strength, thus outputting a watermarked image.

公开(公告)号：US06415041B1

公开(公告)日：2002-07-02

申请号：US09320961

申请日：1999-05-27

申请人： Ryoma Oami ,  Yoshihiro Miyamoto ,  Mutsumi Ohta

发明人： Ryoma Oami ,  Yoshihiro Miyamoto ,  Mutsumi Ohta

IPC分类号： G06K900

CPC分类号： G06T1/0028 ,  G06T1/005 ,  G06T2201/0202

摘要： The present invention relates to a digital watermark insertion system that automatically calculates a digital watermark strength suitable to an input image and inserts a digital watermark into the image. The image categorizing section 103 classifies input images and outputs category indexes. The storage device 101 stores digital watermark characteristic tables describing the correspondences between digital watermark strength, image-quality degradation degree and attack-resistant evaluation value by category index and selects a digital watermark characteristic table to be used according to an input category index. The digital watermark strength calculation section 100 outputs a digital watermark strength to the storage device, calculates an optimum digital watermark strength using an image-quality degradation degree and a resistant evaluation value output from the storage device 103 and constraint information input by an user. The digital watermark insertion section converts embedded data into a digital watermark and inserts the digital watermark in an input image with the strength of an input optimum digital watermark strength, thus outputting a watermarked image.

摘要翻译： 本发明涉及一种数字水印插入系统，其自动计算适合于输入图像的数字水印强度，并将数字水印插入到图像中。 图像分类部103对输入图像进行分类并输出分类索引。 存储装置101存储电子水印特征表，其描述数字水印强度，图像质量劣化程度和抗攻击性评估值之间的对应关系，并根据输入类别索引选择要使用的数字水印特征表。 电子水印强度计算部100向存储装置输出数字水印强度，使用从存储装置103输出的图像质量劣化度和耐性评价值以及用户输入的约束信息来计算最佳数字水印强度。 数字水印插入部分将嵌入数据转换为数字水印，并以输入的最佳数字水印强度的强度将输入图像插入数字水印，从而输出水印图像。

公开(公告)号：US07339706B2

公开(公告)日：2008-03-04

申请号：US10437893

申请日：2003-05-15

申请人： Mutsumi Ohta

发明人： Mutsumi Ohta

IPC分类号： H04N1/405

CPC分类号： H04N1/4053

摘要： An error diffusion processing circuit includes an error diffusion processing unit and a noise signal unit. The error diffusion processing unit generates a first output image signal of a first pixel by carrying out an error diffusion process, based on an inputted first input image signal of the first pixel. The number of gray tones of the first output image signal is smaller than that of the input image signal. The noise signal unit which generates a noise signal and outputs the noise signal to the error diffusion processing unit. The noise signal is inputted into a feedback loop of the error diffusion process.

摘要翻译： 误差扩散处理电路包括误差扩散处理单元和噪声信号单元。 误差扩散处理单元基于输入的第一像素的第一输入图像信号，进行误差扩散处理，生成第一像素的第一输出图像信号。 第一输出图像信号的灰度色调数小于输入图像信号的灰度色调。 产生噪声信号的噪声信号单元，并将噪声信号输出到误差扩散处理单元。 噪声信号被输入到误差扩散处理的反馈回路中。

公开(公告)号：US5396237A

公开(公告)日：1995-03-07

申请号：US247464

申请日：1994-05-23

申请人： Mutsumi Ohta

发明人： Mutsumi Ohta

IPC分类号： H03M7/30 ,  G06T9/00 ,  H03M5/00 ,  H03M7/00 ,  H04B1/66 ,  H04N1/41 ,  H04N7/24 ,  H04N19/00 ,  H04N19/30 ,  H04N19/50 ,  H04N19/59 ,  H04N19/61 ,  H04N19/635 ,  H04N19/93 ,  H04N19/94 ,  H04N19/96

CPC分类号： G06T9/007 ,  H04B1/667

摘要： In a subband coding device for coding a digital device input signal which is a one-dimensional or a two-dimensional signal, a single coding circuit is used instead of a conventional combination of coders and a multiplexer. The coding circuit is for coding subband samples of different frequency bands in each sample group across the frequency bands, as by starting from a lowest frequency band and ending at a highest frequency band or reversedly, and preferably with attention directed to correlation which the subband samples have between two adjacent frequency bands. Zero-level components of the subband samples are preferably run-length coded. When the subband samples of each sample group have a tree structure including subtrees, the subband samples are preferably scanned from a subtree to another subtree either starting at or ending at the subband sample of the lowest frequency band.

摘要翻译： 在用于对作为一维或二维信号的数字设备输入信号进行编码的子带编码装置中，使用单个编码电路代替编码器和多路复用器的常规组合。 编码电路用于编码跨频段的每个样本组中的不同频带的子带样本，如从最低频带开始并以最高频带结束，或者相反地，并且最好关注子带样本 具有两个相邻频带之间。 子带样本的零电平分量优选地进行行程长度编码。 当每个样本组的子带样本具有包括子树的树结构时，子带样本优选地从子树被扫描到从最低频带的子带样本开始或结束的另一个子树。

公开(公告)号：US06175661B1

公开(公告)日：2001-01-16

申请号：US09127635

申请日：1998-08-03

申请人： Ryoma Oami ,  Mutsumi Ohta

发明人： Ryoma Oami ,  Mutsumi Ohta

IPC分类号： G06K936

CPC分类号： G06T9/007

摘要： The invention provides a reversible eight-element discrete cosine transform system which can be realized with a practical circuit and provide transform values proximate to those obtained by actual eight-element discrete cosine transform. In 4×4 matrix transform which appears when eight-element discrete cosine transform is decomposed in accordance with a high speed calculation method, transform values (X1, X7, X3, X5) are divided into (X1, X7) and (X3, X5), and if (X1, X7) are determined, then possible values as (X3, X5),are limited. This is utilized for quantization of the elements. (X1, X7) are quantized with step sizes of k1 and k2 by operators to obtain quantization values (Q1, Q7). Meanwhile, from (X3, X5), global quantization values are obtained by a quantizer using a conventional reversible quantization technique while local quantization values are obtained using a second numerical value table, and quantization values (Q3, Q5) are obtained from the values of the gloval quantization values and the local quantization values. Then, an eight-element discrete cosine transform system is constructed by a combination of reversible transform quantization of a 4×4 matrix and conventional reversible transform quantization of a 2×2 matrix.

摘要翻译： 本发明提供了可逆的八元离散余弦变换系统，其可以用实际电路实现，并提供接近于通过实际的八元离散余弦变换获得的变换值。 在按照高速计算方法分解八元素离散余弦变换时出现的4×4矩阵变换中，将变换值（X1，X7，X3，X5）分为（X1，X7）和（X3，X5）， 并且如果（X1，X7）被确定，则可能的值（X3，X5）被限制。 这被用于元素的量化。 （X1，X7）由操作者用k1和k2的步长量化，以获得量化值（Q1，Q7）。 同时，从（X3，X5），通过使用常规可逆量化技术的量化器获得全局量化值，同时使用第二数值表获得局部量化值，并且从（X3，X5）的值 手套量化值和局部量化值。 然后，通过4×4矩阵的可逆变换量化和2x2矩阵的常规可逆变换量化的组合来构造八元离散余弦变换系统。

公开(公告)号：US5999957A

公开(公告)日：1999-12-07

申请号：US999397

申请日：1997-12-29

申请人： Mutsumi Ohta

发明人： Mutsumi Ohta

IPC分类号： H03M7/00 ,  G06F17/14 ,  G06T9/00 ,  H03M7/30 ,  H03M7/40

CPC分类号： G06T9/007 ,  G06F17/147

摘要： The invention provides a coding system and a decoding system wherein a discrete cosine transform which provides a high coding efficiency is approximated to allow reversible coding and decoding while maintaining the high coding efficiency and a system which includes such coding and decoding systems. Reversible coding is realized by multiplying a transform matrix by a fixed number for each row to approximate the transform matrix with integer values, performing re-quantization in a basic region defined by a multiple of a determinant for suppressing redundancy while maintaining a condition wherein reversible coding is possible in the basic region, and performing re-quantization for the entire region making use of the fact that such basic region appears periodically in a signal space.

摘要翻译： 本发明提供了一种编码系统和解码系统，其中提供高编码效率的离散余弦变换近似于允许可逆编码和解码同时保持高编码效率，并且包括这样的编码和解码系统的系统。 可逆编码通过将每行的变换矩阵乘以固定数来实现，以使整数值近似于变换矩阵，在由多个用于抑制冗余的行列式确定的基本区域中执行重新量化，同时保持可逆编码 在基本区域中是可能的，并且利用这样的基本区域在信号空间中周期性地出现的事实，对整个区域进行重新量化。