计算机工程
計算機工程
계산궤공정
COMPUTER ENGINEERING
2009年
24期
225-228
,共4页
服务质量%网络延迟预测%线性预测%自适应媒体播放
服務質量%網絡延遲預測%線性預測%自適應媒體播放
복무질량%망락연지예측%선성예측%자괄응매체파방
Quality of Service(QoS)%network delay prediction%linear prediction%Adaptive Media Playout(AMP)
针对AMP-Live模型中存在的问题,提出一种基于报文延迟预测的自适应媒体播放算法(NEWAMP),采用未来信道和缓冲状态的预测值作为视频报文播放速率调整的依据,将速率变化的程度进一步细化,同时考虑应用要求的最大端到端延迟,提高算法性能,与传统播放算法相比,NEWAMP在保证报文因下溢和上溢而丢弃的概率足够小的前提下,缓冲延迟减小了约50%,而与普通AMP-Live方法相比,NEWAMP不仅减小了报文因下溢和上溢而丢弃的概率,还将缓冲延迟减小了约40%.实验结果证明了该算法的有效性.
針對AMP-Live模型中存在的問題,提齣一種基于報文延遲預測的自適應媒體播放算法(NEWAMP),採用未來信道和緩遲狀態的預測值作為視頻報文播放速率調整的依據,將速率變化的程度進一步細化,同時攷慮應用要求的最大耑到耑延遲,提高算法性能,與傳統播放算法相比,NEWAMP在保證報文因下溢和上溢而丟棄的概率足夠小的前提下,緩遲延遲減小瞭約50%,而與普通AMP-Live方法相比,NEWAMP不僅減小瞭報文因下溢和上溢而丟棄的概率,還將緩遲延遲減小瞭約40%.實驗結果證明瞭該算法的有效性.
침대AMP-Live모형중존재적문제,제출일충기우보문연지예측적자괄응매체파방산법(NEWAMP),채용미래신도화완충상태적예측치작위시빈보문파방속솔조정적의거,장속솔변화적정도진일보세화,동시고필응용요구적최대단도단연지,제고산법성능,여전통파방산법상비,NEWAMP재보증보문인하일화상일이주기적개솔족구소적전제하,완충연지감소료약50%,이여보통AMP-Live방법상비,NEWAMP불부감소료보문인하일화상일이주기적개솔,환장완충연지감소료약40%.실험결과증명료해산법적유효성.
Aiming at the drawbacks in AMP-Live model, a NEW Adaptive Media Playout(NEWAMP) algorithm based on packet-delay prediction is proposed. The main modification is that, the predicted value of the future channel and the buffer state may be used as the basis of playout policies. Moreover, after thining the playout speed and considering the maximum end-to-end delay, the algorithm performance may be improved further. In contrast to the classical media playout, NEWAMP algorithm decreases the average buffer delay more than 50 percent with low enough packet loss ratio of overflow and downflow. To the traditional AMP-Live algorithm, not only the packet loss ratio of overflow and downflow is decreased, but also the average buffer delay is deceased almost 40 percent. Experimental results show this algorithm is effective.
