Qos technology will quickly " shrink " the bandwidth of the call to adjust for internet congestion and implement automatic repeat of lost packets Qos技術(shù)將“縮小”呼叫的帶寬為了網(wǎng)際網(wǎng)路阻塞調(diào)整并且迅速執(zhí)行對丟失的若干包進行自動重復(fù)。
I also analyze the physical layer , data link layer and the progress of the protocol , etc . then i introduce the algorithm of automatic repeat request and calculate the utilization ratio of the link 然后采用了協(xié)議的分層設(shè)計概念,根據(jù)協(xié)議要求制定了幀格式,詳細分析并設(shè)計了物理層、數(shù)據(jù)鏈路層和協(xié)議工作流程等。
Simulation results based on modified jm1 . 4 codec show that implemented nwarq can stop error propagation at decoder and completely recover damaged video without introducing any additional playout delay , comparing to ec and conventional arq ( automatic repeat request ) technique 測試結(jié)果表明:本文實現(xiàn)的無等待arq算法相對于傳統(tǒng)的arq技術(shù)和差錯掩蓋技術(shù)而言,能在不影響解碼器端重建圖像正常回放的情況下,阻止差錯的擴散,實現(xiàn)圖像的完全徹底恢復(fù)。