发明名称 |
Method for image compression implementing fast two-dimensional discrete cosine transform |
摘要 |
A method and apparatus for the realization of two-dimensional discrete cosine transform (DCT) for an 8*8 image fragment with three levels of approximation of DCT coefficients. A first embodiment uses two multiplications for a pixel. A second embodiment does not use multiplications. The accuracy of approximation of DCT coefficients in the second embodiment is coordinated with distortion defined by a given quantization matrix. The Discrete Algebraic Transform (DAT) is presented. The DAT is a good approximation of the DCT and can be used in any combination with DCT.
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申请公布号 |
US5642438(A) |
申请公布日期 |
1997.06.24 |
申请号 |
US19950405901 |
申请日期 |
1995.03.17 |
申请人 |
ALARIS, INC.;G.T. TECHNOLOGY, INC. |
发明人 |
BABKIN, VLADIMIR |
分类号 |
G06F17/14;G06T9/00;(IPC1-7):G06K9/36 |
主分类号 |
G06F17/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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