Improved packet loss concealment for PCM VoIP
Keywords:Algorithms, Approximation theory, Computational complexity, Internet, Network protocols, Parameter estimation, Pulse code modulation, Signal filtering and prediction, Signal receivers, Telecommunication systems, Packet loss, Perceptual Estimation of Speech Quality (PESQ), Public switched telephone networks (PSTN), Voice-over IP (VoIP)
AbstractA high-performance concealment algorithm for pulse code modulation (PCM) coded speech was presented. The new concealment technique uses a linear prediction with a large order filter to model the speech. A threshold, based on the fact that voiced speech tends to be more energetic in the residual signal, was determined. It was found by the PESQ-MOS scores that the proposed algorithm exhibits a superior high-quality concealment performance in all cases.
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