一個基于速率控制的Internet視頻流服務(wù)方案
An approach for Internet video streaming based on rate control
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摘要: 由于視頻流服務(wù)對于網(wǎng)絡(luò)服務(wù)質(zhì)量有著較高的要求,而現(xiàn)有的Internet所提供的是盡力而為的服務(wù),無法保證數(shù)據(jù)的實時傳輸。該文設(shè)計了一個用于Internet上視頻流的端到端傳輸方案.整個方案設(shè)計的目的是在網(wǎng)絡(luò)本身缺乏服務(wù)質(zhì)量保證的條件下盡可能達到最好的視頻傳輸質(zhì)量。根據(jù)可用帶寬估計和網(wǎng)絡(luò)信息反饋,系統(tǒng)對發(fā)送速率進行調(diào)整,并提供兩種視頻流服務(wù):存儲視頻和實時視頻。仿真結(jié)果表明方案的性能良好,能滿足Internet視頻流的需求。
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關(guān)鍵詞:
- 自適應(yīng)傳輸協(xié)議; 視頻流; 存儲視頻; 實時視頻; 實況視頻
Abstract: Video streaming requires high quality of service (QoS) guarantee of transport system, but current Internet only provides best-effort service, and is not suit for real-time transform of video data. To address the issues of meeting delay-constrained video streaming over Internet, this paper presents and end-to-end adaptive transmission approach without any modification to the Internet infrastructure. The design emphasis is on trying to obtain the best quality of video reception possible in the absence of network QoS guarantees. According to the estimation of available bandwidth and network feedback information, the video steam sender could adjust the sending rate, and then achieve the best transmission efficiency. Two kinds of streaming services have been considered in proposed protocols: stored video and live video. Simulation results show the well performance of proposed system for Internet video streaming. -
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