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Advances in Multimedia
Volume 2014, Article ID 362196, 10 pages
http://dx.doi.org/10.1155/2014/362196
Research Article

Cross-Layer Framework for Multiuser Real Time H.264/AVC Video Encoding and Transmission over Block Fading MIMO Channels Using Outage Probability

Faculty of Electrical Engineering and Information Technologies, University Cyril and Methodius, Skopje, Macedonia

Received 25 June 2013; Accepted 29 August 2013; Published 2 January 2014

Academic Editor: Martin Reisslein

Copyright © 2014 Slavche Pejoski and Venceslav Kafedziski. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We present a framework for cross-layer optimized real time multiuser encoding of video using a single layer H.264/AVC and transmission over MIMO wireless channels. In the proposed cross-layer adaptation, the channel of every user is characterized by the probability density function of its channel mutual information and the performance of the H.264/AVC encoder is modeled by a rate distortion model that takes into account the channel errors. These models are used during the resource allocation of the available slots in a TDMA MIMO communication system with capacity achieving channel codes. This framework allows for adaptation to the statistics of the wireless channel and to the available resources in the system and utilization of the multiuser diversity of the transmitted video sequences. We show the effectiveness of the proposed framework for video transmission over Rayleigh MIMO block fading channels, when channel distribution information is available at the transmitter.