This paper presents a channel adaptation method named spectral adjusting (SA) normalizes the distorted speech spectrum with a piecewise linear normalization function.

In preprocess stage, based on analysis of many normalization algorithm, the author propose a novel non-linear normalization method, which is the combination of point-density and line-density method.

The linear film is the key to make plate, subject the network deformation of positive film, is meaningful to do the normalization and standardization of making film or plates well.