基于双边线性预测的信包丢失隐藏算法

本文提出了一种基于双边线性预测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)预测丢失信包。线性加权双边线性预测的样点获得最终的重建信号。使用重叠相加和幅度调整操作平滑重建信号和真实信号之间的边界。经过非正式试听和ITU-T P.862协议所推荐的PESQ算法测试,本文建议算法的重建语音信号质量,与其他四种流行重建算法相比有了较为明显的改善。

A Packet Loss Concealment Algorithm Based on Two-Sided Linear Prediction

This paper presents a two-sided linear prediction based packet loss concealment(PLE)algorithm which predicts lost packets from speech segments via either preceding,or both preceding and subsequent packets(If subsequent packet is available).Pre- dicted samples are smoothed by linear weighting to obtain the final reconstructed signal.It also performs overlap-and-adding and ampli- tude-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 significantly improved the performance,compared with other four popular reconstruction algorithms.