The invention provides an image data compression system, an image data decompression method and a memory bandwidth reduction method. The method for image data decompression, the image data of a pixel in the block, the method includes: obtaining each parameter in a entropy multiple channels in a quadrant; a part of each channel is located in entropy in quadrant; basis respectively and each channel in a plurality of noise entropy the bit length determines the bit length of each channel noise; decoding part and noise part entropy; entropy parameters obtained for each part and the entropy decoding part multiplied by the noise, to get a product; use a reverse overlapping and interleaved mapping mechanism to add a gross product a prediction; the relationship between pixels in the quadrant removed.
【技术实现步骤摘要】
【技术保护点】
一种图像数据压缩系统,用以压缩多个图像数据值,上述图像数据压缩系统包括: 一差分计算器,用以计算上述图像数据值在一像素区块中的多个相邻像素之间的多个差值,其中上述像素区块包括多个像素; 一预测器,用以依据计算所得的上述差值,预测上述像素区块中上述各像素的一预测值; 一预测误差计算器,用以依据计算所得的上述预测值,计算上述像素区块中上述各像素的一预测误差值; 一映射器,用以将上述各预测误差值映射至一正数数据值以产生多个映射数据值; 一熵参数计算器,用以决定一熵参数;一除法器,用以将上述各映射数据值除以上述熵参数以产生一熵部分及一噪声部分;以及 一编码器,用以对上述 ...
【技术特征摘要】
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【专利技术属性】
技术研发人员:洪洲,廖群峰,
申请(专利权)人:威盛电子股份有限公司,
类型:发明
国别省市:71
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