Packet Loss Concealment Algorithm in VoIP
Qingsong Xie, Wei Wei, Luo Kai, Yan Ling-bo · Jisuanji gongcheng · 2009
This paper presents a two-sided linear prediction and pitch-adjusted based packet loss concealment algorithm to alleviate the speech distortion caused by lost packets in VoIP.This algorithm predicts lost packets from speech segments via either preceding,or both preceding and subsequent packets(if subsequent packet is available).Predicted samples,whose pitches are modified,are smoothed by linear weighting to obtain the final reconstructed signal which appears more reasonable in phase continuity.The assessment of resultant speech quality via objective measurement with PESQ algorithm from ITU-T P.862 shows that the algorithm significantly improves the performance.