Dynamic Frame Dropping for Bandwidth Control in MPEG Streaming System
Dynamic Frame Dropping for Bandwidth Control in MPEG Streaming System
复制标题
MPEG 流系统中带宽控制的动态丢帧
DOI：
10.1023/a:1022195128444
复制
发表时间：
2003
影响因子：
3.6
通讯作者：
Rhan Ha
中科院分区：
文献类型：
--
作者：
H. Cha;Jaehak Oh;Rhan Ha
在可用带宽动态变化的网络环境中，期望流媒体系统根据底层网络资源的动态性以自适应的方式控制媒体质量。本文介绍了一种采用动态丢帧概念的MPEG实时滤波系统的实现。过滤系统以受控的方式丢弃视频帧，并实时重建有效的MPEG系统流。该系统由一系列过滤模块组成，每个模块都经过精心设计，以保持实时流媒体的同步特性。一个特殊的努力是正确的实现视频和音频同步后，帧丢失。实验结果表明，该系统能够产生有效的MPEG系统流，且流的媒体带宽由给定的丢帧策略动态控制。
In a network environment where the available bandwidth changes dynamically, it is desirable for a streaming system to control the media quality in an adaptive way according to the dynamics of underlying network resource. This paper presents the implementation of a real-time MPEG filtering system which uses the concept of dynamic frame-drop. The filtering system drops video frames in a controlled way and reconstructs a valid MPEG system stream in real-time. The system consists of a sequence of filtering modules and each module is carefully designed to maintain the synchronization characteristics of real-time streaming. A special effort is given to the correct implementation of video and audio synchronization after frame-drop. The experiments show that the implemented system produces a valid MPEG system stream after filtering as well as the media bandwidth of a filtered stream is dynamically controlled by a given frame-drop policy.