Method and computer program for removing a pseudo signal having a lot of energy

摘要

A method for removing a pseudo signal from a main signal integrates the original signal (S101) with respect to time, and then, decomposes it into the sum of one Approximation and at least one Detail by wavelet transformation (S103). The wavelet transformation is executed with deepening level numbers until the level number reaches a threshold level number at which the ratio of the energy of the one Approximation to the energy of the original signal has a predetermined relationship with a predetermined threshold value. The Approximation at the threshold level number as a pseudo signal component is approximated to zero, and the Approximation and Detail up to said threshold level number are reconstituted by wavelet inverse transformation (S105).