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Dynamic Redundant Audio Transmission for Packet Loss Recovery in VoIP Systems  

권철홍 (대전대학교 컴퓨터·정보통신공학부)
김무중 ((주)언어과학 음성공학연구소)
Publication Information
The Journal of the Acoustical Society of Korea / v.21, no.4, 2002 , pp. 349-360 More about this Journal
Abstract
In ITU H.323 teleconference system, the RTP/RTCP protocol is offered to transfer real-time multimedia stream. Both sender and receiver hate experience in packet loss and jitter which result from network congestion over Internet. Audio quality over Internet depends on the number of lost packets and on jitter between successive packets. The goal of our study is to improve the speech quality over Internet by checking the packet loss characteristics of the network and adopting the but for control management mechanism at the receiver. We suggest a dynamic redundant audio transmission mechanism which examines the packet loss rate and uses the feedback information through RTCP.
Keywords
VoIP; QoS; RTP/RTCP; Redundant audio transmission;
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