虛擬網(wǎng)絡(luò)計(jì)算在應(yīng)用程序共享中的應(yīng)用研究
測試結(jié)果表時(shí),當(dāng)VNC系統(tǒng)調(diào)用屏幕區(qū)域變化檢測算法后,VNC Server端的發(fā)送數(shù)據(jù)量平均會(huì)有10%左右的下降。這在遠(yuǎn)程多點(diǎn)應(yīng)用程序共享中,會(huì)大大減輕VNC Server端的發(fā)送壓力,減少網(wǎng)絡(luò)擁塞現(xiàn)象出現(xiàn)的概率,從而提高了應(yīng)用程序共享時(shí)遠(yuǎn)程客戶端響應(yīng)速度。
本文介紹了在低速網(wǎng)絡(luò)環(huán)境下遠(yuǎn)程視頻會(huì)議系統(tǒng)中通過VNC協(xié)議進(jìn)行應(yīng)用程序共享時(shí)存在的問題,提出了一種新的改進(jìn)方案,并結(jié)合新方案提出了一種新的屏幕區(qū)域變化檢測算法。此外,對系統(tǒng)在調(diào)用新的屏幕區(qū)域變化檢測算法前后進(jìn)行了測試比較。該方案已經(jīng)應(yīng)用于大連浩視數(shù)字技術(shù)有限公司的VcomOffice遠(yuǎn)程視頻會(huì)議系統(tǒng)。通過多個(gè)實(shí)驗(yàn)場景的測試,實(shí)驗(yàn)結(jié)果表明,采用新的屏幕變化區(qū)域檢測算法后,VNC Server端的發(fā)送數(shù)據(jù)量出現(xiàn)了較大程度的下降,為低速網(wǎng)絡(luò)環(huán)境下遠(yuǎn)程視頻會(huì)議系統(tǒng)節(jié)省了網(wǎng)絡(luò)帶寬,提高了應(yīng)用程序共享系統(tǒng)的實(shí)時(shí)性,從而實(shí)現(xiàn)了VNC在低速網(wǎng)絡(luò)環(huán)境下的應(yīng)用。
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