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| description |
In distributed multimedia applications time-dependent data streams
are conveyed and processed under real-time conditions. The timely
accurate activation of the stream handlers processing the data units
of streams requires deriving their scheduling times from the
temporal properties of the data streams and the amount of data that
is processed in each activation. In this paper, we propose the
activation set concept as a data access abstraction to consume sets
of data units from a group of time-dependent data streams having
synchronization relationships among each other. The concept supports
the consumption of multiple periodic data streams of different rates
as well as the integration of aperiodic streams. It is shown how
scheduling times of activations are derived from the streams'
temporal properties and the requested amount of data. When a stream
handler is activated, data units of the streams are selected for
consumption according to synchronization relationships and tolerated
skew bounds. The effects of the approach on delays are discussed in
the context of a rate-monotonic scheduling algorithm. The concept
provides a configurable interface to groups of time-dependent data
streams which, for example, is required when mixing streams. It is
widely applicable in multimedia system architectures that allow for
configuration of distributed multimedia applications based on
interconnected stream handling components.
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| publisher |
(not available)
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| type |
Text
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| Article in Proceedings
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| source |
In: IS&T/SPIE Proceedings Vol.2417, Multimedia Computing and
Networking'95
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| ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-1995-05/INPROC-1995-05.ps
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| contributor |
Verteilte Systeme (IPVR)
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| format |
application/postscript
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| 142627 Bytes
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| subject |
Information Systems (CR H)
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