1ITU-T R.ec.P.862, Perceptual evaluation of speech quality (PESO,): An objective method for end-to-end speech quality assessment of narrow-band telephone networks and speech codecs,2001.2.
2ITU-T Rec.P.862.1, Mapping function for transforming P.862 raw result scores to MOS-LQO,2003.11.
3Supplee L M,Cohn R P,Collura J S,et al. MELP:The New Federal Standard at 2400bps[ C ]. 1997 IEEE International Conference on. IEEE, 1997,2 : 1591 - 1594.