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    • 66. 发明授权
    • Picture converting apparatus, picture converting method, learning apparatus, learning method, and record medium
    • 图像转换装置,图像转换方法,学习装置,学习方法和记录介质
    • US06414717B1
    • 2002-07-02
    • US09585874
    • 2000-06-01
    • Tetsujiro KondoNaoki KobayashiKenji TakahashiYoshinori Watanabe
    • Tetsujiro KondoNaoki KobayashiKenji TakahashiYoshinori Watanabe
    • H04N701
    • G06T3/40H04N1/41H04N19/00H04N19/10H04N19/105H04N19/176H04N19/59H04N19/61H04N19/63
    • A picture reducing circuit 1 reduces a supplied original picture. An upper hierarchical level picture memory 2 stores an input upper hierarchical level picture. A predictive tap obtaining circuit 3 extracts a predictive tap from the upper hierarchical level picture stored in the upper hierarchical level picture memory 2 and outputs the extracted predictive tap to a predictive coefficient calculating circuit 4, a pixel value updating circuit 5, and a mapping circuit 6. The predictive coefficient calculating circuit 4 generates an observation equation using the predictive tap as student data and pixels of an original picture corresponding thereto as teacher data, solves the observation equation, and generates predictive coefficients. The pixel value updating circuit 5 generates an observation equation using the predictive coefficient as student data received from the predictive coefficient calculating circuit 4 and original picture data corresponding thereto as teacher data, solves the observation equation, and simultaneously obtains optimum values of a plurality of updated pixel values corresponding to given coefficients.
    • 图像缩小电路1减少所提供的原始图像。 上层次图像存储器2存储输入的上层级图像。 预测抽头获取电路3从存储在上层电平图像存储器2中的上层级图像中提取预测抽头,并将所提取的预测抽头输出到预测系数计算电路4,像素值更新电路5和映射电路 预测系数计算电路4使用预测抽头作为学生数据和与其对应的原始图像的像素作为教师数据产生观察方程,解决观察方程,并产生预测系数。 像素值更新电路5使用预测系数作为从预测系数计算电路4接收的学生数据和与其对应的原始图像数据作为教师数据生成观测方程,解决观察方程,同时获得多个更新的 对应于给定系数的像素值。
    • 67. 发明授权
    • Picture encoding device, picture encoding method, picture decoding device, picture decoding method, and recording medium
    • 图像编码装置,图像编码方法,图像解码装置,图像解码方法以及记录介质
    • US06339615B1
    • 2002-01-15
    • US09562197
    • 2000-05-02
    • Tetsujiro KondoKenji Takahashi
    • Tetsujiro KondoKenji Takahashi
    • H04N712
    • H04N19/59H04N19/186H04N19/50H04N19/593
    • A compressed picture signal having a number of pixels smaller than the number of pixels of an original picture signal is generated, and plural patterns of prediction pixels are formed by using neighboring pixels of a notable pixel which is one of pixels constituting the compressed picture signal. The original picture signal is predicted from each of the plural patterns of prediction pixels and a predetermined prediction coefficient, and each of prediction values with respect to the plural patterns of prediction pixels is outputted. A prediction error of each of the prediction values of the plural patterns of prediction pixels with respect to the original picture signal is calculated, and a pattern code corresponding to a prediction pixel with which a minimum prediction error is obtained, among the plural patterns of prediction pixels, is appended to the pixel value of the notable pixel.
    • 产生具有小于原始图像信号的像素数的像素数的压缩图像信号,并且通过使用构成压缩图像信号的像素之一的显着像素的相邻像素来形成预测像素的多个图案。 从预测像素的多个模式中的每一个预测原始图像信号和预定预测系数,并输出关于多个图案的预测像素的各个预测值。 针对原始图像信号计算预测像素的多个模式的每个预测值的预测误差,并且在多个预测模式中计算与获得最小预测误差的预测像素对应的模式码 像素,附加到显着像素的像素值。
    • 68. 发明授权
    • Picture encoding apparatus, picture encoding method, picture encoding
and transmitting method, and picture record medium
    • 图像编码装置,图像编码方法,图像编码和发送方法以及图像记录介质
    • US6014174A
    • 2000-01-11
    • US932712
    • 1997-09-17
    • Tetsujiro KondoYasuhiro FujimoriKenji TakahashiKunio Kawaguchi
    • Tetsujiro KondoYasuhiro FujimoriKenji TakahashiKunio Kawaguchi
    • H04N5/85H04N5/926H04N7/26H04N7/32
    • H04N19/98H04N5/9261H04N5/85H04N5/9264
    • On a decoding side, parameters (minimum value MIN and dynamic range DR) are optimized in such a manner that a decoded error of original signal values and restored values becomes minimum. A maximum value detecting portion 2 detects the maximum value MAX of pixels of each block composed of (3.times.3) pixels. Likewise, a minimum value detecting portion 3 detects the minimum value MIN. A subtracting portion 4 generates a dynamic range DR. A subtracting portion 5 subtracts MIN from each of input pixel values y and generates normalized values. A step width calculating portion 6 calculates a quantizing step width .DELTA. with DR. A quantizing portion 7 generates quantized values x (each of which is composed of 4 bits) with .DELTA.. A least squares method based estimating portion 8 generates decoded values y' with y and x and obtains an optimized dynamic range DR' and an optimized minimum value MIN' in such a manner that the sum of square of an error (y'-y) becomes minimum. A framing portion 11 frames x, DR', and MIN' and records the framed data on a record medium 15 through an error-correction-code adding portion 12, a modulating portion 13, and a recording portion 14.
    • 在解码侧,参数(最小值MIN和动态范围DR)以原始信号值和恢复值的解码误差变得最小的方式进行优化。 最大值检测部分2检测由(3×3)像素组成的每个块的像素的最大值MAX。 同样,最小值检测部分3检测最小值MIN。 减法部分4产生动态范围DR。 减法部分5从每个输入像素值y中减去MIN,并产生归一化值。 步长计算部6用DR计算量化步长DELTA。 量化部分7产生具有DELTA的量化值x(每个由4位组成)。 基于最小二乘法的估计部分8产生具有y和x的解码值y',并且获得优化的动态范围DR'和优化的最小值MIN',使得误差(y'-y)的平方和 变得最小。 成帧部分11将x,DR'和MIN'帧化,并通过纠错码添加部分12,调制部分13和记录部分14将成帧数据记录在记录介质15上。
    • 70. 发明授权
    • Efficient variable length encoder and decoder
    • 高效可变长度编码器和解码器
    • US5850261A
    • 1998-12-15
    • US767830
    • 1996-12-17
    • Tetsujiro KondoKenji Takahashi
    • Tetsujiro KondoKenji Takahashi
    • G06T9/00H04N1/41H04N7/26H04N7/30H04N7/24
    • H04N19/98H04N19/13H04N19/30H04N19/60H04N19/91
    • There are provided an encoding circuit 2 which encodes pixel data by an ADRC method; a dividing circuit 3 which divides the data from the encoding circuit 2 into a plurality of bit planes; an encoding circuit 4 which encodes, with run length coding and Huffman coding, the data at every bit plane of the plurality of bit planes divided and generated by the dividing circuit; and a framing circuit 5 which adds an error correcting code to the encoded pixel data. The data encoded by the ADRC method are divided into the bit plane for each of MSB, 2nd MSB, . . . LSB and the respective bit planes are processed by the run length coding and Huffman coding, so that it is possible to compress the data with a high compressibility and at the same time minimize the lowering of the restoration capability of the data when an error is generated.
    • 提供了通过ADRC方法对像素数据进行编码的编码电路2; 分割电路3,其将来自编码电路2的数据分割成多个位平面; 编码电路4,其利用游程长度编码和霍夫曼编码对由分割电路划分和产生的多个位平面中的每个位平面进行编码; 以及将纠错码添加到编码像素数据的成帧电路5。 由ADRC方法编码的数据被分为MSB,第二MSB中的每一个的位平面。 。 。 LSB和相应的位平面由游程长度编码和霍夫曼编码进行处理,使得可以以高压缩性压缩数据,并且同时在产生错误时最小化数据的恢复能力的降低 。