Comparative Study of Packet Loss Concealment Methods in Transmission of Voice over IP (VoIP)
Hamza Kheddar, Bachir Boudraa · 2015
The work consists of developing two MELP coders operating respectively at 1.2 kbps and 2.4 kbps. The improvements of the coder operating at 2.4 kbps by implementing packet loss concealment (masking) techniques based on the receiver which consists of interleaving information frames. These techniques are compared and mentioned on (1). For this purpose, we extended this comparison to a method previously developed in our laboratory, called multiple descriptions coding (MDC) described on (2), which use two MELP coders operating respectively at 2.4 kbps for the first description and 1.2 kbps for the second description. We used as evaluation technique a method called PESQ (Perceptual Evaluation of Speech Quality) standardized by ITU-T.