Receiver-based packet loss concealment for pulse code modulation (PCM G.711) coder

Abstract

This paper introduces a high-performance concealment algorithm for packetized PCM-coded speech as in ITU-T Recommendation G.711. The proposed prediction algorithm implements a combination of linear prediction model and reverse-order replicated pitch period technique as implemented in the ITU-T G.711 Appendix A (ITUT Recommendation G.117, November 2000). The new algorithm is compared to the ITU-T G.711 Appendix A standard and to the commercial tool of packet repetition. It is shown to produce better concealment quality in almost all cases.