Distortion-based slice level prioritization for real-time video over QoS-enabled wireless networks

Authors:
Ismail A. Ali;Martin Fleury;Mohammed Ghanbari
Affiliations:
School of Computer Science and Electronic Engineering, University of Essex, Colchester, UK;School of Computer Science and Electronic Engineering, University of Essex, Colchester, UK;School of Computer Science and Electronic Engineering, University of Essex, Colchester, UK
Venue:
Advances in Multimedia
Year:
2012

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Abstract

This paper presents a prioritization scheme based on an analysis of the impact on objective video quality when dropping individual slices from coded video streams. It is shown that giving higher-priority classified packets preference in accessing the wireless media results in considerable quality gain (up to 3 dB in tests) over the case when no prioritization is applied. The proposed scheme is demonstrated for an IEEE 802.11e quality-of-service- (QoS-) enabled wireless LAN. Though more complex prioritization systems are possible, the proposed scheme is crafted formobile interactive or user-to-user video services and is simply implemented within the Main or the Baseline profiles of an H.264 codec.