the fast lifting wavelet transform Research and its implementation
Huang Mao-cheng · Microcomputer Information · 2009
DWT standard for calculating wavelet coefficients existing speed and efficiency problems, according to fast lifting scheme to calculate wavelet coefficients, CDF 9 /7 is chosen for the fast lifting wavelet transform FIR filter, Java has been chosen for its platform independent character, the standard method relies on convolution of the original signal with FIR filter structures. Fast lifting scheme basically breaks up the original filters into a series of smaller structures. This paper discusses an implementation of this algorithm in Java language, providing a very sophisticated and versatile algorithm that is up to 50% faster than the standard way with no extra memory requirements.