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    • 36. 发明授权
    • Image data compression apparatus and decoding apparatus
    • 图像数据压缩装置和解码装置
    • US08306341B2
    • 2012-11-06
    • US12568099
    • 2009-09-28
    • Junichi OdagiriShigeru Yoshida
    • Junichi OdagiriShigeru Yoshida
    • G06K9/36H04N11/02
    • H04N19/635H04N19/122H04N19/132H04N19/61H04N19/63
    • 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.
    • 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。
    • 38. 发明申请
    • VIDEO COMPRESSION ENCODING/DECOMPRESSION DEVICE, VIDEO COMPRESSION ENCODING/DECOMPRESSION PROGRAM AND VIDEO GENERATION/OUTPUT DEVICE
    • 视频压缩编码/解码设备,视频压缩编码/解码程序和视频生成/输出设备
    • US20100195724A1
    • 2010-08-05
    • US12759509
    • 2010-04-13
    • Shigeru YoshidaJunichi Odagiri
    • Shigeru YoshidaJunichi Odagiri
    • H04N7/12H04N5/93
    • H04N19/507H04N19/85
    • When a periodic pattern is not included in image data 210, a prediction error encoding unit 204 outputs the variable-length code of a prediction error quantization value 214 generated by prediction encoding as compressed data 215. When the periodic pattern is included in the image data 210, a periodic pattern encoding unit 208 outputs only information about the periodic pattern as the compressed data 215, while the output of the prediction error encoding unit is stopped. On the decompression side, while the copy instruction of a pixel value before one cycle from the compressed data is not detected, the decompression operation in a normal prediction encoding system is executed. When the instruction is detected, the pixel value one cycle before, internally stored is copied and outputted.
    • 当图像数据210中不包括周期性图案时,预测误差编码单元204将通过预测编码生成的预测误差量化值214的可变长度码输出为压缩数据215.当周期性图案包括在图像数据中时 如图210所示,周期性图案编码单元208仅输出关于周期性图案的信息作为压缩数据215,同时预测误差编码单元的输出停止。 在解压缩侧,当没有检测到来自压缩数据的一个周期之前的像素值的复制指令时,执行正常预测编码系统中的解压缩操作。 当检测到指令时,复制并输出内部存储的一个周期的像素值。