Design of 9/7 biorthogonal wavelet filter banks with high performance
Yigang He · Jisuanji gongcheng yu sheji · 2007
An improved technique to construct the 9/7 biorthogonal wavelet filter banks with high performance and low complexity is presented.First,the trigonometric function transform is used to factorize the perfect restruction and the biorthogonal conditions of bi-orthogonal wavelets filter banks.Then the coefficients of the original 9/7 wavelet filter banks is optimized,consequently a novel 9/7 wavelet filter banks with binary digit coefficients is obtained.The improved 9/7 wavelet filter banks has the advantage that its discrete wavelet transform(DWT) is realized by the shift-add operation,which benefits highly efficient implementation of DWT via very large scale integration(VLSI).The theory and the experimentation show that the coding gain and compression performance of the improved 9/7 wavelet filter banks approximate CDF9/7 wavelet filter banks and the complexity reduce greatly.