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    • 92. 发明授权
    • Efficient implementation of n-point DCT, n-point IDCT, SA-DCT and SA-IDCT algorithms
    • n点DCT,n点IDCT,SA-DCT和SA-IDCT算法的有效实现
    • US07216140B1
    • 2007-05-08
    • US09676556
    • 2000-09-30
    • Yen-Kuang ChenNicholas H. Yu
    • Yen-Kuang ChenNicholas H. Yu
    • G06F7/52
    • G06F17/147
    • An efficient implementation of n-point discrete cosine transform, n-point inverse discrete cosine transform, shape adaptive discrete cosine transform and shape adaptive inverse discrete cosine transform algorithms for multimedia compression and decompression optimization. An n-point DCT function is represented by a first equation having an input matrix, an output matrix and a matrix of predetermined values. An n-point IDCT function is represented by a second equation having an input matrix, an output matrix and a matrix of predetermined values. The multiplication operations within the matrix of predetermined values are paired, thereby reducing processor instructions. SIMD operations, MMX operations, VLSI implementation, single processor implementation, and vector processing are used to perform the algorithms.
    • 用于多媒体压缩和解压缩优化的n点离散余弦变换,n点离散余弦变换,形状自适应离散余弦变换和形状自适应逆离散余弦变换算法的有效实现。 n点DCT函数由具有输入矩阵,输出矩阵和预定值的矩阵的第一等式表示。 n点IDCT函数由具有输入矩阵,输出矩阵和预定值的矩阵的第二方程表示。 预定值的矩阵内的乘法运算配对,从而减少处理器指令。 使用SIMD操作,MMX操作,VLSI实现,单处理器实现和向量处理来执行算法。