A Packet Loss Concealment Technique for VoIP using Steganography

摘要

Speech quality of VoIP (Voice over Internet Protocol) may potentially be degraded by transmission errors such as packet loss and delay that are basically inevitable in best-effort communications. This study newly proposes an error concealment technique for such degradation by taking account of both sender-based and re-ceiver-based procedure. In the proposed technique, sender-based side information is transmitted by Steganography, so that its datagram is completely compatible with the conventional VoIP format. Objective evaluation indicates that the proposed technique may potentially be useful for improving speech quality.