This book constitutes the refereed proceedings of the 6th International Conference on Text, Speech and Dialogue, TSD 2003, held in Ceské Budejovice, Czech Republic in September 2003. The 60 revised full papers presented together with 2 invited contributions were carefully reviewed and selected from 121 submissions. The papers present a wealth of state-of-the-art research and development results in the field of natural language processing with an emphasis on text, speech, and spoken language ranging from theoretical and methodological issues to applications in various fields, such as web information retrieval, the semantic web, algorithmic learning, and dialogue systems.

This volume constitutes seleted papers from the 12th International Conference on Text, Speech and Dialogue, TSD 2009, held in Pilsen, Czech Republic, in September 2009. This volume contains a collection of submitted papers presented at the conference which were thoroughly reviewed by three members of the conference reviewing team consisting of more than 40 top specialists in the conference topic areas. A total of 53 accepted papers out of 112 submitted, altogether contributed 127 authors and co-authors, were selected for presentation at the conference by the program committee and then included in this book. Theoretical and more general contributions were presented in common (plenary) sessions. Problem oriented sessions as well as panel discussions then brought together the specialists in limited problem areas with the aim of exchanging knowledge and skills resulting from research projects of all kinds.