Title：A data compression method
Country：China
Patent No.：201110376355.7
Legal Status：Authorized
Inventor：Kai Tong, Guolin Li, Xiang Xie, Yingke Gu, Kai Zhao, Shouhao Liu, Zhihua Wang
Assignee：Tsinghua University
Address：Tsinghua University,Haidian District Beijing 100084, China
Filing Date：2011-11-23
Issue Date：2013-08-07
Abstract：
The present invention relates to the field of data compression technology, discloses a data compression method, comprising the steps of: S1, the input of the four one-dimensional data x0, x1, x2, x3 for 4-point DCT transform, the output of four-dimensional data f0 , f1, f2, f3; S2, a quantization step size of DCT coefficients are quantized. The invention utilizes the trigonometric relationship symmetric one-dimensional data compression process 4-point DCT transform coefficients of the portion (α, β) is extracted, the quantization step weighting, the weighting of the quantization step after the DCT coefficients are quantized , so that the accuracy of the data compression, the same structure of the existing technology in the case of DCT operation needed three multiplications simplified multiplication is 1, which accelerates the speed of data compression and reduces its cost.
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