9ITU T Rec. P 862. Perceptual Evaluation of Speech Quality (PESQ) - an objective method for end-to-end speech quality assessment of narrowband telephone networks and speech codecs[S]. Geneva,Switzerland, 2001
10Beerends J G, Hekstra A P, Rix A W. Perceptual evaluation of speech quality(PESQ) :the new ITU standard for end-to- end speech quality assessment, Part Ⅱ-psychoacoustic model [ J ]. AES : Journal of the Audio Engineering Society, 2002, 50(10) :765 -778.