A comparison of packet loss concealment and control for voice transmission over IP network services

This paper presents a comparison of end-to-end recovery and control methods for the ITU-T G.729 CS-ACELP codec operating at 8 Kbps. We have tested Media independent forward error correction (FEC) parity 3, Media independent FEC parity 4 and Media specific FEC combined with queue management methods namely Drop Tail, Predictive Loss Pattern (PLoP) and Random Early Detection (RED). The performance measures using perceptual evaluation of speech quality (PESQ) tests under various packet loss conditions prove that Media independent FEC parity 3 combined with RED algorithm give better results.