Distributed Sub-frame Interleaving:A New Solution for Packet Loss Resilient Speech Coding
MA Li-hong, G. S. Key · Communications technology · 2010
Packets carrying real-time speech data may be lost during transmission over unreliable networks.This loss could lead to considerable degradation of speech quality.In this paper,a new distributed subframe interleaving scheme for multiple description speech coding is proposed,thus to avoid repeat transmission and ensure acceptable speech quality when packet loss occurs.With the introduction of distributed subframe interleaving operated on two adjacent speech frames,the proposed scheme creates two correlative descriptions,each offers an acceptable quality,and each could be partially restored from the other.The performance of the proposed scheme is evaluated by the objective speech quality measurement PESQ.Experimental results indicate that this scheme is suitable to unreliable and bandwidth-limited packet networks.