Title Author-s Contact information Department Major Citation Year of Publication Publisher Sponsor Type of Publication ISSN URI/DOI Full Text (Yes,No) Key words Abstract A comparison of combined classifier architectures for Arabic Speech Recognition Essa, E.M. Tolba, A.S. Elmougy, S mougy@ksu.edu.sa, Telephone number 00966-01-4695205, Dept. of Computer Science, College of Computer and Information Sciences, King Saud University, Computer Science, Computer Science, 2008 IEEE Explorer - Proceeding of International Conference on Computer Engineering & Systems, ICCES 2008., Pages(s): 139 – 153, Cairo, EGYPT, 2008 Conference http://ieeexplore.ieee.org/Xplore/login.jsp?url=http%3A%2F%2Fieeexp lore.ieee.org%2Fstamp%2Fstamp.jsp%3Ftp%3D%26arnumber%3D477 2985&authDecision=-203 Yes Combined classifiers offer solution to the pattern classification problems which arise from variation of the data acquisition conditions, the signal representing the pattern to be recognized and classifier architecture itself. This paper studies the effect of classifier architecture on the overall performance of the Arabic Speech Recognition System. Five different proposed combined classifier architectures are studied and a comparison of their performance is conducted. Boosting is another type of combined classifier to improve the performance of almost any learning algorithm. We investigate the effect of combining Neural Networks by AdaBoost.M1 and propose an enhancement for AdaBoost.M1 algorithm. It is found that the proposed enhanced AdaBoost.M1 outperforms either the architectures based on ensemble approaches or the modular approaches.