摘要：Peer-to-Peer multimedia streaming is expected to grow rapidly in the near future and
will consist of variety of media. These media requires a guaranteed end-to-end Quality
of Service (QoS). However, packet losses during transmission are a serious problem for
them as they result in degradation of the QoS. Forward Error Correction (FEC) is a
promising technique to recover the lost packets and improve the QoS of streaming
media. In the conventional media streaming, pre-buffering of media stream and FEC
techniques are required to cope with delay jitter and packet losses. However, FEC may
degrade the QoS of all streaming due to the increased congestion caused by FEC
overhead when streaming sessions increase. In this paper, a novel FEC method that
avoids the adverse effect of FEC overhead during media streaming is proposed. It
accommodates the delay jitter even without pre-buffering of media stream. It also
provides the QoS according to requirements and environments of users by using layered
coding of FEC. Thus, packet losses and jitter are recovered at each end host and do not
affect the next-hop streaming. The results of computer simulations show that our
proposed method provides better media quality compared to conventional methods.
关键词：Peer-to-Peer streaming, Packet loss ratio, Forward error correction
