在現行的網路應用上，無線網路已經是不可厚非的趨勢。相較於有線網路的特性，無線網路不論是在頻寬使用上或是資料傳輸的特性也都有許多限制。而多媒體傳輸也受到許多挑戰，為了提升多媒體傳輸於具有移師資料特性的通道上，在視訊串流上使用不等量錯誤保護系統是項非常普及的技術之一，前向糾錯(Forward Error Correction, FEC)是種在損失通道上常用於提升視訊串流品質的錯誤回復機制。此外，在柏努利通道(Bernouli channel)上已有針對不同權重的串流訊框，在限制的傳輸速率下而提出的訊框層級(frame level)前向糾錯機制。然而，現存的各種傳輸環境常常都會造成突發性的損失，例如現行的無線網路也都具備這種損失特性。相較於柏努利通道的特行，在突發通道上前向糾錯機制的效能則會受到影響而降低。因此，針對影像的特性，在本篇提出評估模型來分析影像串流在突發損失通道上的影響，並且透過網路模擬工具(Network Simulation 2, NS-2)來的實驗來驗證模組的正確性，在接收端回饋網路的偵測狀態，如封包損失率、平均突發損失長度等。傳送端則可以透過接收到的資訊而評估網路狀態進行前向糾錯調整控制，經由網路模擬數據分析與驗證，我們提出的評估模型可以有效的針對突發性遺失通道進行準確的分析與估算，進而可以讓前向糾錯機制應用於影像串流上效能得以提升。

Unequal error protection systems are a popular technique for video streaming. Forward error correction (FEC) is one of error control techniques to improve the quality of video streaming over lossy channels. Moreover, frame-level FEC techniques have been proposed for video streaming due to different priority video frames within the transmission rate constraint on a Bernoulli channel. However, various communication and storage systems are likely corrupted by bursts of noise in the current wireless behavior. If the burst losses go beyond the protection capacity of FEC, the efficacy of FEC can be degraded. Therefore, our proposed model allows an assessment of the perceived quality of H.264/AVC video streaming over a bursty channel, and was validated by simulation experiments on the NS-2 network simulator at a given estimate of the packet loss ratio and average burst length. The results suggest a useful reference in designing the FEC scheme for video applications, and as the video coding and channel parameters are given, the proposed model can provide a more accurate evaluation tool for video streaming over bursty channels and help to evaluate the impact of FEC performance on different burst-loss parameters.

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