New algorithm for modulated complex lapped transform with symmetrical window function
New algorithm for modulated complex lapped transform with symmetrical window function
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DOI：
10.1109/lsp.2004.838191
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发表时间：
2004-11
影响因子：
3.9
通讯作者：
Qionghai Dai;Xinjian Chen
中科院分区：
文献类型：
--
作者：
Qionghai Dai;Xinjian Chen
提出了一种对称窗函数调制复叠变换（MCLT）的快速计算算法。该方法基于两个离散余弦变换（dct）、两个阶段的蝴蝶运算和附加乘法。MCLT系数的实部或虚部可以从两个DCT系数块中的一个独立获得。与现有算法相比，该算法不仅降低了计算复杂度，而且具有适合硬件实现的规则架构。
An algorithm for the fast computation of modulated complex lapped transform (MCLT) with symmetrical window function is proposed. The method is based on two discrete cosine transforms (DCTs), two stages of butterfly operations and additional multiplications. The real or imaginary part of the MCLT coefficients can be independently obtained from one of the two blocks of DCT coefficients. The proposed algorithm not only reduces the computational complexity compared with previous algorithms, but also has regular architecture which is suitable for hardware implementations.