
Proceedings Paper
Global optimization of video quality by improved rate control on IP-networksFormat | Member Price | Non-Member Price |
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Paper Abstract
This paper addresses the optimal rate control in a communication
network consisting of multiple users, transmitting
video. We suggest that rate control in the Internet should take
the signal properties into account. An optimal distribution of
rates should maximise the aggregate quality of the received
signals. This paper addresses video sequences specifically, but
the results are expected to hold for more generalized signals as
well. The optimal transmission rate of a user will vary in time.
This is due to its dependence on time-varying parameters such as
the traffic routing, network topology and the demands of other
users. Moreover, the optimal transmission rate is dependent on
the metric selected to describe the video quality. We show that
when congestion is controlled `correctly' the optimal distribution
of rates is an attractor. Using the proposed rate control
mechanisms, the transmission rates will then converge weakly
towards this attractor. The algorithm for rate control mechanisms
for video transmission is then given. The proposed control
mechanisms are directly implementable in the Internet without
requiring intelligent feedback from the Internet gateways.
Simulations using the proposed congestion control mechanisms
have been conducted using different metrics to describe the
video quality.
Paper Details
Date Published: 23 June 2003
PDF: 11 pages
Proc. SPIE 5150, Visual Communications and Image Processing 2003, (23 June 2003); doi: 10.1117/12.503123
Published in SPIE Proceedings Vol. 5150:
Visual Communications and Image Processing 2003
Touradj Ebrahimi; Thomas Sikora, Editor(s)
PDF: 11 pages
Proc. SPIE 5150, Visual Communications and Image Processing 2003, (23 June 2003); doi: 10.1117/12.503123
Show Author Affiliations
Andy G. Backhouse, Chalmers Univ. of Technology (Sweden)
Irene Gu, Chalmers Univ. of Technology (Sweden)
Irene Gu, Chalmers Univ. of Technology (Sweden)
Sverrir Olafsson, BTexact Technologies (United Kingdom)
Mike J. Smith, Univ. of York (United Kingdom)
Mike J. Smith, Univ. of York (United Kingdom)
Published in SPIE Proceedings Vol. 5150:
Visual Communications and Image Processing 2003
Touradj Ebrahimi; Thomas Sikora, Editor(s)
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