METHOD AND DEVICE FOR SIGNAL PROCESSING

摘要

PROBLEM TO BE SOLVED: To perform signal processing that extracts a common feature which does not depend on the physical size of an object and processes it from a signal of an analysis object by performing wavelet transformation of an input signal, making its output synchronize with the input signal by a computer, performing Mellin transform and extracting a signal characteristic. SOLUTION: This method includes a wavelet transformation step in which a computer performs wavelet transformation of an input signal and a characteristic extraction step in which the characteristic of a signal is extracted by such a manner that the computer synchronizes an output of the step performing wavelet transformation with the input signal and performs Mellin transform of it. In this device, stabilizing wavelet processing part 2 performs wavelet transformation processing of an input signal 1. A Mellin transform processing part 3 performs Mellin transform of the signal 1 which is outputted from the part 2 and is subjected to stabilizing wavelet processing. A signal processing part 4 performs prescribed signal processing of an output of the part 3 and outputs the results 5.