Criterion-based speech packet loss recovery technique

In order to solve the problem of speech packet loss on the Internet, a criterion-based packet-lovss recovery technique is proposed. It combines the sender-based forward error correction (FEC) mechanism and the receiver-based error concealment(EC) mechanism. The receiver-based EC method is simulated to get the virtual reconstruction for every packet and the criterion of minimizing mean square errors(MMSE) is adopted to obtain the redundancy information at the sender part. At the receiver part, the real reconstruction for the lost packet is obtained using the EC method together with the redundancy. Simulation results showed that the speech quality over the IP network is improved efficiently at a low bandwidth consumption with the proposed method.