The advancement in the Automatic Speech Recognition (ASR) technology, coupled with the rapid growth in the
wireless telephony market has created a compelling need for speech-enabled services. Voice-activated dialling has
become a de facto standard in many of the mobile phones in the market today. The speech recognition technology has
also been applied more recently to voice messaging and personal access services. A Voice Extensible Markup Language
(Voice XML) has been designed to bring the full power of web development and content delivery to voice response
applications. Voice portals that provide voice access to conventional graphically oriented services over the Internet
are now becoming popular. Forecasts show that speech-driven services will play an important role on the 3G market.
Users of mobile terminals want the ability to access information while on the move and the small portable mobile
devices that will be used to access this information need improved user interfaces using speech input.