VoIP中一种信包丢失隐藏算法

为减轻基于IP语音（VoIP）网络中因信包丢失而造成的语音失真，提出一种基于双边线性预测和基音调整的信包丢失隐藏算法。该方法利用丢失信包的前一信包或邻接信包（在后一信包可获得的情况下）预测丢失的信包。线性加权经过基音调整后的双边线性预测样点以获得最终的重建信号。最建信号在相位连续性上表现更加合理。经过ITU-T R862协议推荐的PESQ算法测试证明，该算法重建语音信号的质量有了较为明最的改善。

Packet Loss Concealment Algorithm in VoIP

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 assessmen...