1. Reconstruction error in waveform transmission (Corresp.)
2. ETSI/GSM(1998).Digital cellular telecommunications system (Phase 2+); Adaptive Multi‐Rate (AMR) speech transcoding (GSM 06.90 version 7.2.1).Document ETSI EN 301 704 V7.2.1 (2000‐04).
3. ITU‐T(2001).Recommendation P.862: Perceptual evaluation of speech quality (PESQ): an objective method for end‐to‐end speech quality assessment of narrow‐band telephone networks and speech codecs.
4. ITU‐T(2003).Recommendation P.862.1: mapping function for transforming P.862 raw result scores to MOS‐LQO.
5. ITU‐T(1996).Recommendation P.800: methods for subjective determination of transmission quality.