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1. 发明申请

US20100080479A1 IMAGE DATA COMPRESSION APPARATUS AND DECODING APPARATUS 失效
标题翻译：图像数据压缩装置和解码装置
公开(公告)号：US20100080479A1
公开(公告)日：2010-04-01
申请号：US12568099
申请日：2009-09-28
申请人： Junichi ODAGIRI , Shigeru YOSHIDA
发明人： Junichi ODAGIRI , Shigeru YOSHIDA
IPC分类号： G06K9/36
CPC分类号： H04N19/635 , H04N19/122 , H04N19/132 , H04N19/61 , H04N19/63
摘要： An image data compression apparatus includes: a filter coefficient calculation unit to perform a filter process to separate pixels extracted in accordance with a one-dimensional subband coding into low- and high-frequency components, and to calculate coefficient values of respective filter coefficients; prediction units to perform different predictions respectively for the calculated coefficient values; a predicted coefficient value calculation unit to calculate predicted coefficient values to be used for posterior predictions by calculating each from at least one of predicted values and from corresponding at least one of the calculated coefficient values; a memory unit to hold the predicted coefficient values calculated by the predicted coefficient value calculation unit; and a compression coding unit to calculate a difference between each predicted value and corresponding each coefficient value, and to perform coding after quantizing the difference, or to perform coding on the basis of the difference.
摘要翻译：图像数据压缩装置包括：滤波器系数计算单元，用于执行滤波处理，以将根据一维子带编码提取的像素分离成低频和高频分量，并计算各滤波器系数的系数值; 预测单元对所计算的系数值分别执行不同的预测; 预测系数值计算单元，通过从预测值中的至少一个和相应的所计算的系数值中的至少一个计算每一个来计算用于后验预测的预测系数值; 存储单元，用于保持由预测系数值计算单元计算出的预测系数值; 以及压缩编码单元，用于计算每个预测值和对应的每个系数值之间的差，并且在量化该差之后执行编码，或者基于该差进行编码。

2. 发明申请

US20110013854A1 IMAGE DATA COMPRESSION APPARATUS, DECOMPRESSION APPARATUS, COMPRESSING METHOD, DECOMPRESSING METHOD, AND STORAGE MEDIUM 有权
标题翻译：图像数据压缩装置，解压缩装置，压缩方法，解压缩方法和存储介质
公开(公告)号：US20110013854A1
公开(公告)日：2011-01-20
申请号：US12887014
申请日：2010-09-21
申请人： Junichi ODAGIRI
发明人： Junichi ODAGIRI
IPC分类号： G06K9/36
CPC分类号： H04N19/42 , H04N19/105 , H04N19/182 , H04N19/593
摘要： An image compression apparatus includes: a line memory unit for holding pixel values for at least one immediately previous line in the lines to be processed of an image to be compressed; a division unit for dividing pixels of the line to be processed into 2n-pixel blocks; a first estimation value calculation unit for extrapolation-estimating the 2n-1-th pixel and the 2n-th pixel in the blocks divided, and obtaining an estimated value in processing for the first hierarchical level; a second estimation value calculation unit for interpolation-estimating certain pixels and obtaining an estimated value in the processing for the second hierarchical level through the processing for the n-th hierarchical level; and an estimation coding unit for obtaining an estimation error from the estimated value, converting the estimation error into a quantization number, converting the quantization number into a variable length code, and obtaining a compression code.
摘要翻译：一种图像压缩装置包括：行存储单元，用于保持要压缩的图像的要处理的行中的至少一个紧接的前一行的像素值; 划分单元，用于将要处理的行的像素划分成2n像素块; 第一估计值计算单元，用于外推估计被划分的块中的第2n-1个像素和第2n个像素，并且获得用于第一层级的处理中的估计值; 第二估计值计算单元，用于内插估计某些像素，并通过第n层级的处理获得用于第二层级的处理中的估计值; 以及估计编码单元，用于从估计值获得估计误差，将估计误差转换为量化数，将量化数转换成可变长度码，并获得压缩码。

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