流媒体数据传输主动式滤波整流模型

The Active Wave-filtering and Stream-stabilizing Model for Streaming-media

针对采用 VBR编码的流媒体数据 ,由于其码率变化大 ,常出现数据猝发传输 ,而传统的流控技术又需要大量的客户端反馈 ,致使带宽调整具有较大的滞后性而不适合基于 U DP的 VBR流媒体服务的问题 ,提出了一种基于流媒体数据传输速率本身特征的主动滤波整流模型。由于此模型无需客户反馈信息 ,可利用服务器的数据缓冲对数据流进行滤波整流处理 ,从而不仅减少了由 VBR编码带来的数据猝发传输 。

How to provide quality Streaming Media service with limited bandwidth is an important issue worthy of discussing and it has become the hotspot of streaming media research. As a popular codec method usually used now, VBR (Variable Bit Rate) often causes the streaming media's coding rate to alter remarkably and results in abrupt data transportation, which will affect the service quality significantly. To handle this problem, many flow control techniques have been brought forward. But on the other hand, the conventional technique of flow controlling requires feedbacks from clients and the bandwidth adjusting lags far behind the actual data transportation so that it is unsuitable for the VBR streaming media service based on UDP (User Datagram Protocol). At the same time, it is yet not necessary to support fastidious real time performance for some kinds of streaming media service, like video service. In this paper, we present an active wave filtering and stream stabilizing model based on the feature of data transportation velocity. Because it does not require feedbacks from clients, it not only reduces the abrupt data transportation caused by VBR but also provides steady streaming data transportation service by the means of filtering and stabilizing.