Implementation of Optimized Wavelet Packet Basis Algorithm Based on DSP

Wavelet packet analysis is a precies analytical method by which the frequency band is further divided into multiple layers and the high frequency is divided in a more deep-going way.On the basis of characters of the signal,it can select the frequency band so that it can match the signal frequency properly and improve the time frequency resolution.In order to apply wavelet packet analysis in signal processing on DSP embedded equipment,the process of wavelet packet decomposition and the method for choosing the best base and cost function are discussed.Wavelet packet decomposition whose cost function is Shannon entropy is then implemented on floating point DSP TMS320C6713B.Experiment of wavelet packet decomposition and best base choosing is made.Effectiveness of this method is verified by results of the experiment.