Sérgio M. M. de Faria, Pedro A. Amado Assunção: SIGMAP 2007 - Proceedings of the Second International Conference on Signal Processing and Multimedia Applications, Barcelona, Spain, July 28-31, 2007, SIGMAP is part of ICETE - The International Joint Conference on e-Business and Telecommunications. INSTICC Press 2007, ISBN 978-989-8111-13-5