MPEG: a video compression standard for multimedia applications
Communications of the ACM - Special issue on digital multimedia systems
Designing file systems for digital video and audio
SOSP '91 Proceedings of the thirteenth ACM symposium on Operating systems principles
Multimedia network file servers: multichannel delay-sensitive data retrieval
Multimedia Systems
IEEE/ACM Transactions on Networking (TON)
D-BIND: an accurate traffic model for providing QoS guarantees to VBR traffic
IEEE/ACM Transactions on Networking (TON)
A survey of statistical source models for variable-bit-rate compressed video
Multimedia Systems - Special issue on video content based retrieval
An introduction to database systems (7th ed.)
An introduction to database systems (7th ed.)
Multimedia Information Storage and Management
Multimedia Information Storage and Management
MPEG Video Compression Standard
MPEG Video Compression Standard
IEEE MultiMedia
Cost Analyses for VBR Video Servers
IEEE MultiMedia
Everything You Wanted to Know About MPEG-7: Part 1
IEEE MultiMedia
Scheduling Multimedia Documents Using Temporal Constraints
Proceedings of the Third International Workshop on Network and Operating System Support for Digital Audio and Video
Constant Data Length Retrieval for Video Servers with Variable Bit Rate Streams
ICMCS '96 Proceedings of the 1996 International Conference on Multimedia Computing and Systems
Doing FLIPS: FLexible Interactive Presentation Synchronization
ICMCS '95 Proceedings of the International Conference on Multimedia Computing and Systems
A media synchronization survey: reference model, specification, and case studies
IEEE Journal on Selected Areas in Communications
Client-server synchronization and buffering for variable rate multimedia retrievals
IEEE Journal on Selected Areas in Communications
Heuristics for Optimizing Multi-Clip Queries in Video Databases
Multimedia Tools and Applications
Timed Petri Net Representation of SMIL
IEEE MultiMedia
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New techniques are necessary to satisfy the high bandwidth requirement and temporal relationships of multimedia data streams in a network environment. Clients can experience gaps between the multimedia data streams during presentations as the multimedia server services multiple clients. This variable delay occurs between the end of one multimedia stream and the beginning of the next multimedia stream because client requests are queued awaiting service. This leads to interruptions and discontinuities of the client's presentation. Special techniques are necessary to manage the temporal relationships between multimedia streams in distributed environments. In this paper we propose two scheduling algorithms for delivering multimedia streams by using the query script, which is a multimedia database interface for clients. A client can specify all the multimedia objects that make up the presentation and their temporal relationships in a query script. Once submitted, the information in the query script is used by the multimedia database system to schedule and optimize the delivery. Using simulations we analyzed the performance of the proposed delivery scheduling algorithms and the predelivery optimization method. The simulation results show that delivery scheduling algorithms satisfy the specified temporal relationships between multimedia streams while maintaining better use of system resources.