MATLAB directly uses orthogonal wavelet calculation model to process biorthogonal wavelet, leading to coefficients redundant problem. According to that, this paper proposes 9/7 wavelet prototype as the improved algorithm to hand the nonperiodic signal, compared with the given algorithm in MATLAB, for the signals which have the odd starting-even length and even starting-odd length, after wavelet transformation, two approximate coefficients and one detail coefficient can be saved, for the signals which have t...