A Buffer Occupancy-Based Adaptive Flow Control and Recovery Scheme for Real-time Stored MPEG Video Transport over Internet (Special Issue on Performance and Quality of Service (QoS) of Multimedia Networks

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概要

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• As the current Internet becomes popular in information access, demands for real-time display and playback of continuous media are ever increasing. The applications include real-time audio/video clips embedded in WWW, electronic commerce, and video-on-demand. In this paper, we present a new control protocol R^3CP for real-time applications that transmit stored MPEG video stream over a lossy and best-effort based network environment like the Internet. Several control mechanisms are used : a) packet framing based on the meta data ; b) adaptive queue-length based rate control scheme ; c) data preloading ; and d) look-ahead pre-retransmission for lost packet recovery. Different from many adaptive rate control schemes proposed in the past, the proiposed flow control is to ensure continuous, periodic playback of video frames by keeping the receiver buffer queue length at a target value to minimize the probability that player finds an empty buffer. Contrary to the widespread belief that "Retransmission of lost packets is unnecessary for real-time applications, " we show the effective use of combining look-ahead preretransmission control with proper data preloading and adaptive rate control scheme to improve the real-time playback performance. The performance of the proposed protocol is studied via simulation using actual video traces and actual delay traces collected from the Internet. The simulation results show that R^3CP can significantly improve frame playback performance especially for transmission paths with poor packet delivery condition.

• 社団法人電子情報通信学会の論文
• 1998-11-25

著者

• Chen Meng

  The Institute Of Information Science Academia Sinica

• TSOU Fu-Ming

  the Graduate Institute of Communication Engineering, National Taiwan University

• Tsou F‐m

  National Taiwan Univ. Twn

• Tsou Fu-ming

  The Graduate Institute Of Communication Engineering National Taiwan University

• Sun Yeali

  The Department Of Information Management National Taiwan University

関連論文

• WDFQ : An Efficient Traffic Scheduler with Fair Bandwidth-Sharing for Wireless Multimedia Services(Special Issue on Mobile Multimedia Communications)
• A Buffer Occupancy-Based Adaptive Flow Control and Recovery Scheme for Real-time Stored MPEG Video Transport over Internet (Special Issue on Performance and Quality of Service (QoS) of Multimedia Networks
• Placement of VBR Video on Zoned Disks for Real-Time Playback

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