前向误差校正法实时修复丢包

摘要

在IP电话和远程会议系统等实时应用中，丢包不可避免并极大地影响传输服务质量.前向误差校正法FEC（ForwardErrorCorrection）是实时修复丢包的一种较好的方法.本文介绍了FEC丢包修复方法的原理，并把丢包修复功能结合到我们实现的实时传输协议RTP（Real-timeTransportProtocol）库中，验证了丢包修复功能的正确性.%In real-time applications,such as IP phones and remote conferencesystems,packet loss that impairs quality of transmitting severely is inevitable.FEC(Forward Error Correction)is a better way for repairing lost packets.In this paper,a method of lost repairing with FEC based on RTP（Real-time Transport Protocol)was designed and implemented. Then a testing method of lost repairing function and results are illustrated.