Technischer Bericht TR-1994-02

Rothermel, Kurt; Helbig, Tobias: Clock hierarchies : an abstraction for grouping and controlling media streams.
Universität Stuttgart, Fakultät Informatik, Fakultätsbericht Nr. 1994/02.
21 Seiten, englisch.
CR-Klassif.C.2.4 (Distributed Systems)
D.2.2 (Software Engineering Tools and Techniques)
H.5.1 (Multimedia Information Systems)
KeywordsDistributed Multimedia System; System Services Interface; Stream Synchronization; Grouping

Synchronization plays an important role in multimedia systems at various levels of abstraction. In this paper, we propose a set of powerful abstractions for controlling and synchronizing continuous media streams in distributed environments. The proposed abstractions are based on a very general computation model, which allows media streams to be processed (i.e. produced, consumed or transformed) by arbitrarily structured networks of linked components. Further, compound components can be composed from existing ones to provide higher levels of abstractions. The clock abstraction is provided to control individual media streams, i.e. streams can be started, paused or scaled by issuing the appropriate clock operations. Clock hierarchies are used to hierarchically group related streams, where each clock in the hierarchy identifies and controls a certain (sub)group of streams. Control and synchronization requirements can be expressed in a uniform manner by associating group members with control or sync attributes. An impor

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Abteilung(en)Universität Stuttgart, Institut für Parallele und Verteilte Höchstleistungsrechner, Verteilte Systeme
Eingabedatum24. Juni 1996
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