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http://dx.doi.org/10.3745/KIPSTC.2002.9C.3.375

An Adaptive FEC based Error Control Algorithm for VoIP  

Choe, Tae-Uk (Dept.of Computer Science, Graduate School of Busan National University)
Jeong, Gi-Dong (Dept.of Computer Science, Busan National University)
Publication Information
The KIPS Transactions:PartC / v.9C, no.3, 2002 , pp. 375-384 More about this Journal
Abstract
In the current Internet, the QoS of interactive applications is hardly guaranteed because of variable bandwidth, packet loss and delay. Moreover, VoIP which is becoming an important part of the information infra-structure in these days, is susceptible to network packet loss and end-to-end delay. Therefore, it needs error control mechanisms in network level or application level. The FEC-based error control mechanisms are used for interactive audio application such as VoIP. The FEC sends a main information along with redundant information to recover the lost packets and adjusts redundant information depending on network conditions to reduce the bandwidth overhead. However, because most of the error control mechanisms do not consider end-to-end delay but packet loss rate, their performances are poor. In this paper, we propose a new error control algorithm, SCCRP, considering packet loss rate as well as end-to-end delay. Through experiments, we confirm that the SCCRP has a lower packet loss rate and a lower end-to-end delay after reconstruction.
Keywords
Internet Telephony; VoIP(Voice over IP); FEC(forward Error Correction); Error Control;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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