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IEEE Transactions on Software Engineering
Analysis of the increase and decrease algorithms for congestion avoidance in computer networks
Computer Networks and ISDN Systems
A binary feedback scheme for congestion avoidance in computer networks
ACM Transactions on Computer Systems (TOCS)
Architecture for distributed multimedia database systems
Computer Communications - Multimedia communications
Designing file systems for digital video and audio
SOSP '91 Proceedings of the thirteenth ACM symposium on Operating systems principles
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ACM Transactions on Information Systems (TOIS)
On computing per-session performance bounds in high-speed multi-hop computer networks
SIGMETRICS '92/PERFORMANCE '92 Proceedings of the 1992 ACM SIGMETRICS joint international conference on Measurement and modeling of computer systems
Adaptive feedback techniques for synchronized multimedia retrieval over integrated networks
IEEE/ACM Transactions on Networking (TON)
Synchronous bandwidth allocation in FDDI networks
MULTIMEDIA '93 Proceedings of the first ACM international conference on Multimedia
Streaming RAID: a disk array management system for video files
MULTIMEDIA '93 Proceedings of the first ACM international conference on Multimedia
Performance of inter-media synchronization in distributed and heterogeneous multimedia systems
Computer Networks and ISDN Systems
Synchronized delivery of multimedia information over ATM networks
Communications of the ACM
An RTP/RTCP based approach for multimedia group and inter-stream synchronization
Multimedia Tools and Applications
A group synchronization algorithm for VoIP conferencing
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Computer Networks: The International Journal of Computer and Telecommunications Networking
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Future advances in storage and networking technologies will make it feasible to build multimedia on-demand information servers capable of providing services similar to those of a neighborhood videotape rental store over metropolitan area networks. Such multimedia information servers must not only support retrieval of continuous media units (such as video frames and audio samples), but also preserve synchrony among playback of the different media components constituting a multimedia object. We develop techniques for supporting continuous and synchronous retrieval from multimedia servers. We present feedback techniques by which, during retrieval of multimedia objects from a multimedia server to mediaphones, the multimedia server uses lightweight messages called feedback units transmitted periodically back to it (by mediaphones) to detect impending discontinuities as well as asynchronies at mediaphones. The multimedia server then preventively readjusts media transmission so as to avoid either anomaly, and steers the mediaphones back to synchrony. Given the available buffer sizes at mediaphones and the maximum tolerable asynchrony, we present methods to determine the minimum rate at which feedback units must be transmitted so as to maintain both continuity and synchronization. These feedback techniques remain robust even in the presence of playback rate mismatches and network delay jitter, and their initial simulation for video-audio playback yields a feedback rate of one per 1,000 media units to keep the asynchrony within 250ms, showing that the overhead due to feedback transmission is very small. The constant rate feedback techniques developed in this article form the basis of a prototype on-demand information server being developed at the UCSD Multimedia Laboratory.