A Hybrid Media Transmission Scheme for Wireless VoIP

Abstract

In this paper, we propose an optimization framework for real-time voice transmission overwireless tandem channels prone to both bit errors and packet erasures. Utilizing a hybrid mediadependent and media independent error correction scheme, our proposed framework is capable ofprotecting voice packets against both types of errors. For each group of frames associated with onespeech spurt, the framework finds the optimal parity assignment of each voice frame according toits perceptual importance such that the quality of the received group of frames is maximized. Ourperformance evaluation results show that the proposed scheme outperforms a number of alternativeschemes and has a low computational complexity.