tailieunhanh - Báo cáo hóa học: " Research Article A Low-Complexity UEP Methodology Demonstrated on a Turbo-Encoded Wavelet Image Satellite Downlink"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article A Low-Complexity UEP Methodology Demonstrated on a Turbo-Encoded Wavelet Image Satellite Downlink | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 342415 11 pages doi 2008 342415 Research Article A Low-Complexity UEP Methodology Demonstrated on a Turbo-Encoded Wavelet Image Satellite Downlink Eric Salemi 1 2 3 Claude Desset 1 3 Antoine Dejonghe 1 3 Jan Cornelis 1 2 3 and Peter Schelkens1 2 3 1 Interuniversity Microelectronics Center IMEC Kapeldreef 75 B-3001 Leuven Belgium 2 Vrije Universiteit Brussel VUB Faculty of Applied Science Department ETRO Pleinlaan 2 B-1050 Brussel Belgium 3 Interdisciplinary Institute for BroadBand Technology IBBT B-9050 Gent Belgium Correspondence should be addressed to Claude Desset desset@ Received 1 March 2007 Revised 14 August 2007 Accepted 21 November 2007 Recommended by Dan Lelescu Realizing high-quality digital image transmission via a satellite link while optimizing resource distribution and minimizing battery consumption is a challenging task. This paper describes a methodology to optimize a turbo-encoded wavelet-based satellite downlink progressive image transmission system with unequal error protection UEP techniques. To achieve that goal we instantiate a generic UEP methodology onto the system and demonstrate that the proposed solution has little impact on the average performance while greatly reducing the run-time complexity. Based on a simple design-time distortion model and a low-complexity run-time algorithm the provided solution can dynamically tune the system s configuration to any bitrate constraint or channel condition. The resulting system outperforms in terms of peak signal-to-noise ratio PSNR a state-of-the-art fine-tuned equal error protection EEP solution by as much as 2 dB. Copyright 2008 Eric Salemi et al. 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. 1. INTRODUCTION .