A Quality Adaptation Scheme for Internet Video Streams

Authors:
Panagiotis Papadimitriou;Vassilis Tsaoussidis
Affiliations:
Demokritos University, Electrical & Computer Engineering Department, 12 Vas. Sofias Street, Xanthi, 67100, Greece;Demokritos University, Electrical & Computer Engineering Department, 12 Vas. Sofias Street, Xanthi, 67100, Greece
Venue:
WWIC '07 Proceedings of the 5th international conference on Wired/Wireless Internet Communications
Year:
2007

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Abstract

We propose a layered quality adaptation scheme for video streams to smooth the short-term oscillations induced by Additive Increase Multiplicative Decrease(AIMD) mechanisms, and eventually refine the perceptual video quality. The layered scheme utilizes receiver buffering, adapting the video quality along with long-term variations in the available bandwidth. The allocation of a new layer is based on explicit criteria that consider the available bandwidth, as well as the amount of buffering at the receiver. Consequently, the adaptation mechanism prevents wasteful layer changes that have an adverse effect on user-perceived quality. In the sequel, we concentrate on the interactions of the layered approach with Scalable Streaming Video Protocol(SSVP). Exploiting performance measures related to the perceived quality of rate-adaptive video streams, we quantify the combination of SSVP rate control and receiver-buffered layered adaptation.