Evaluation of H.264/AVC over IEEE 802.11p vehicular networks

The capacity of vehicular networks to offer non-safety services, like infotainment applications or the exchange of multimedia information between vehicles, have attracted a great deal of attention to the field of Intelligent Transport Systems (ITS). In particular, in this article we focus our attent...

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Bibliographic Details
Published in:EURASIP journal on advances in signal processing 2013-04, Vol.2013 (1), p.1-13, Article 77
Main Authors: Rozas-Ramallal, Ismael, Fernández-Caramés, Tiago M, Dapena, Adriana, García-Naya, José Antonio
Format: Article
Language:English
Subjects:
Channels
Coders
Encoders
Engineering
Intelligent transport systems
Multimedia
Networks
Optimization
Quantum Information Technology
Real-Time Multimedia Coding and Transmission
Signal,Image and Speech Processing
Spintronics
Strategy
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Summary:The capacity of vehicular networks to offer non-safety services, like infotainment applications or the exchange of multimedia information between vehicles, have attracted a great deal of attention to the field of Intelligent Transport Systems (ITS). In particular, in this article we focus our attention on IEEE 802.11p which defines enhancements to IEEE 802.11 required to support ITS applications. We present an FPGA-based testbed developed to evaluate H.264/AVC (Advanced Video Coding) video transmission over vehicular networks. The testbed covers some of the most common situations in vehicle-to-vehicle and roadside-to-vehicle communications and it is highly flexible, allowing the performance evaluation of different vehicular standard configurations. We also show several experimental results to illustrate the quality obtained when H.264/AVC encoded video is transmitted over IEEE 802.11p networks. The quality is measured considering two important parameters: the percentage of recovered group of pictures and the frame quality. In order to improve performance, we propose to substitute the convolutional channel encoder used in IEEE 802.11p for a low-density parity-check code encoder. In addition, we suggest a simple strategy to decide the optimum number of iterations needed to decode each packet received.
ISSN:1687-6180
1687-6172
1687-6180
DOI:10.1186/1687-6180-2013-77