MFCC can express speechspectrum more accurately at low frequency, so MFCC is a good method to express the spectral envelope in voice conversion;
MFCC可以更加准确地表示语音低频处的频谱包络，在语音转换中是一种很好的频谱包络表示方法；
2
This paper presents a channel adaptation method named spectral adjusting (SA) normalizes the distorted speechspectrum with a piecewise linear normalization function.
该文提出了一种新的信道自适应方法——频谱调整法。
3
This paper studies the speech enhancement technology, and proposes an improved spectral subtraction method based on the auditory characteristics and the speechspectrum characteristics.