专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4908862A Encoding system capable of accomplishing a high efficiency by anterior and/or posterior processing to quantization 失效
标题翻译：编码系统能够通过对量化的前处理和/或后处理来实现高效率
公开(公告)号：US4908862A
公开(公告)日：1990-03-13
申请号：US118923
申请日：1987-11-10
申请人： Masahide Kaneko , Atsushi Koike , Mutsumi Ohta , Kiichi Matsuda , Naoki Mukawa , Yoichi Kato
发明人： Masahide Kaneko , Atsushi Koike , Mutsumi Ohta , Kiichi Matsuda , Naoki Mukawa , Yoichi Kato
IPC分类号： H04N7/26 , H04N7/30
CPC分类号： H04N19/60 , H04N19/124 , H04N19/13 , H04N19/132 , H04N19/91
摘要： In an encoding system responsive to a sequence of coefficient signals which results from a predetermined linear transform and which is divided into a sequence of blocks, anterior processing is carried out prior to quantization about the coefficient signals in each block to determine a significant area of the coefficient signals by comparing each level of the coefficient signals with a threshold level. Only the coefficient signals within the significant area are judged to be valid and produced as a sequence of significant coefficient signals from a classifying circuit (20) to be quantized by a quantizer (15) into a sequence of quantized signals. The quantized signal sequence is subjected to posterior processing to produce a sequence of encoded signals. The significant area may be decided by the use of a selected one of zone detection, zigzag scanning, and adaptive scanning. In the posterior processing, the quantized signals may be encoded into the encoded signals by the use of a plurality of code sets or tables.

2. 发明授权

US4734767A Encoder capable of faithfully and adaptively encoding a moving image 失效
标题翻译：能够对运动图像进行忠实和自适应编码的编码器
公开(公告)号：US4734767A
公开(公告)日：1988-03-29
申请号：US29565
申请日：1987-03-24
申请人： Masahide Kaneko , Mutsumi Ohta , Kiichi Matsuda , Yoichi Kato
发明人： Masahide Kaneko , Mutsumi Ohta , Kiichi Matsuda , Yoichi Kato
IPC分类号： H04B14/00 , G06T9/00 , H03M7/30 , H03M7/38 , H04N19/60 , H04N7/12
CPC分类号： H04N19/48 , H04N19/12 , H04N19/126 , H04N19/14 , H04N19/176 , H04N19/18 , H04N19/60 , H04N19/61 , H04N19/124 , H04N19/13 , H04N19/132 , H04N19/146 , H04N19/152 , H04N19/91
摘要： In an encoder responsive to a sequence of coefficient blocks each of which is composed of a plurality of orthogonal transform coefficients subjected to predictive encoding and orthogonal transform, the coefficient blocks are classified by a classification circuit (55) into a plurality of classes to produce a control signal (CONT) representative of the classes. A quantization unit (60), a code conversion unit (61), and a coefficient selection unit (62, 64) are controlled by the control signal to select quantization characteristics, code conversion characteristics, and coefficient selection characteristics. The quantization unit comprises a plurality of quantizers corresponding to the quantization characteristics while the code conversion unit and the coefficient selection unit comprise a plurality of code converters and a plurality of selection tables corresponding to the code conversion characteristics and the coefficient selection characteristics, respectively. Consequently, the coefficients are adaptively encoded into a reduced amount of encoded codes on encoding a moving image.
摘要翻译：在响应于系数块序列的编码器中，每个系数块由经过预测编码和正交变换的多个正交变换系数组成，系数块由分类电路（55）分类成多个类别，以产生控制信号（CONT）代表类。通过控制信号来控制量化单元（60），代码转换单元（61）和系数选择单元（62,64），以选择量化特性，代码转换特性和系数选择特性。量化单元包括与量化特性相对应的多个量化器，而代码转换单元和系数选择单元分别包括与代码转换特性和系数选择特性相对应的多个代码转换器和多个选择表。因此，在对运动图像进行编码时，系数被自适应地编码为减少量的编码代码。

3. 发明授权

US4837618A Moving image signal coding system 失效
标题翻译：运动图像信号编码系统
公开(公告)号：US4837618A
公开(公告)日：1989-06-06
申请号：US118467
申请日：1987-11-09
申请人： Yoshinori Hatori , Yoichi Kato , Mutsumi Ohta , Yasuhiro Kosugi
发明人： Yoshinori Hatori , Yoichi Kato , Mutsumi Ohta , Yasuhiro Kosugi
IPC分类号： G06T9/00 , H03M7/30 , H03M7/38 , H04N7/50
CPC分类号： H04N19/132 , H04N19/107 , H04N19/176 , H04N19/61
摘要： A system of coding moving image signals produces a predictive error signal by a predictive coding based on inter-frame correlation and quantizing the predictive error signal for each block of a picture frame constituted by N lines of M pixels. The system includes a block coding/non-coding decision unit for calculating a first evaluation value Sm of the predictive error signal for each block of the picture frame. This unit decides that block non-coding is applicable when the first evaluation value Sm is less than a first threshold value T.sub.1 and that block coding is applicable when the first evaluation value Sm is greater than the first threshold value T.sub.1. The predictive error signal is not transmitted when the result of the decision is for block non-coding, and the predictive error signal is quantized and transmitted when the result of the decision is for block coding.
摘要翻译：编码运动图像信号的系统通过基于帧间相关的预测编码产生预测误差信号，并对由N个M个像素组构成的图像帧的每个块的量化预测误差信号。该系统包括块编码/非编码决定单元，用于计算图像帧的每个块的预测误差信号的第一评估值Sm。当第一评估值Sm小于第一阈值T1时，该单元决定块非编码是适用的，并且当第一评估值Sm大于第一阈值T1时可以应用块编码。当决定结果用于块非编码时，不发送预测误差信号，并且当判定结果用于块编码时，预测误差信号被量化并发送。

4. 发明授权

US07339706B2 Error diffusion processing circuit for an image signal which improves an output image 失效
标题翻译：用于改善输出图像的图像信号的误差扩散处理电路
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。

5. 发明授权

US5396237A Device for subband coding with samples scanned across frequency bands 失效
标题翻译：用于通过频带扫描的样本进行子带编码的设备
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。

6. 发明授权

US4942476A Recording system for recording on a ROM image signal information which has been subjected to efficient redundancy coding 失效
标题翻译：用于记录已经经过有效冗余编码的ROM图像信号信息的记录系统
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。

7. 发明授权

US06470090B2 Digital watermark insertion system and digital watermark characteristic table creating device 失效
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.

8. 发明授权

US06175661B1 Lossless transform coding system for digital signals 失效
标题翻译：用于数字信号的无损变换编码系统
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。

9. 发明授权

US4969039A Image processing system operable in cooperation with a recording medium 失效
标题翻译：图像处理系统，与记录介质协同工作
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。

10. 发明授权

US5999957A Lossless transform coding system for digital signals 失效
标题翻译：用于数字信号的无损变换编码系统
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。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式