Some Problems In Four-band Wavelets

In the classic way of wavelets design-" two-stages".It’s very hard to make full use of all the degrees of freedom.In this paper,We use Newton-Flow algo-rithm to solve nonlinear equations.we make an intensive study on the general type of four-band orthogonal nonlinear-phase wavelets and give variety exam-ples,The length of the wavelet filter are8,12,16. Great attention was paid on the highest regularity in the past research,However, We pay more attention on the full use of the degrees of freedom.