In the filtering algorithm of Ref.

it is by directly comparing the absolute value of Corr 2（ m

n ） after being rescaled and W（m

n） to determine whether the data point W（m

n） should be kept.And the standard deviation σ m of noise at each scale m is employed to stop the iterating.But in application simply doing like this will lead to a rough reconstructed signal.In this paper

the concepts of distinct coefficient COF and threshold coefficient TH are proposed to overcome the deficiency

and the step of edge extraction is also changed to make the choice of COF and TH conveniently.The edges of signal can be kept well while the noise is removed greatly by appropriately choosing COF and TH.The simulation shows that the filtering efficiency of the new algorithm is better than the original one.