Performs a multi-level two-dimensional inverse FWT.

802.11b中CCK11M,CCK5.5M的实现程序，解调用的是FWT算法。-Implementation of 802.11b in the CCK11M program solution is called FWT algorithm.

用matlab实现zigzag扫描，H.264帧内编码中不可缺少的环节-Zigzag scan using matlab implementation, H.264 intra-coded indispensable part in the

wavelet decomposition fast transform

WAVEFAST Perform multi-level 2-dimensional fast wavelet transform. [C, L] = WAVE FAST (X , N, LP, HP) performs a 20 N-level FWT of image (or matrix) X with respect to decomposition filters LP and HP. [C, L] = WAVEFAST(X, N, WNAME) performs the sa