RASTA-PLP:相对光谱变换-感知线性预测

RASTA(Relative Spectral Transform) 下面的介绍摘自 RASTA is a separate technique from RASTA-PLP(Relative Spectral Transform - Perceptual Linear Prediction, a popular speech feature representation). RASTA applies a band-pass filter to the energy in each frequency subband in order to smooth over short-term noise variation and to remove any constant offset resulting from static spectral coloration in the spe