A Speech Signal Reconstruction Algorithm
Tian Xu · Modern Electronics Technique · 2008
In this paper,a two-sided linear prediction-based packet loss concealment algorithm is presented 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 are smoothed by linear weighting to obtain the final reconstructed signal.It also performs overlap-and-adding and amplitude-scaling operations to alleviate discontinuity at packet boundaries.The assessment of resultant speech quality via informal listening test and objective measurement with PESQ algorithm from ITU-T P.862 shows that the proposed algorithm has a significant improvement over other four popular reconstruction algorithms.