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|Initial release||December 14, 2001|
1.2.2 / March 9, 2009
FreeTTS supports end-of-speech markers. Gnopernicus uses these in a number of places: to know when text should and should not be interrupted, to better concatenate speech, and to sequence speech in different voices. Benchmarks conducted by Sun in 2002 on Solaris showed that FreeTTS ran two to three times faster than Flite at the time.
As of February 2014 the newest version of that project originates from March 2009.
- Willie Walker; Paul Lamere; Philip Kwok (August 2002). "FreeTTS - A Performance Case Study" (PDF). Sun Microsystems. Archived from the original (PDF) on 2009-03-25. Retrieved 2009-07-25.
Through using some straightforward optimizations and relying on the aggressive optimizations performed by the Java HotSpot compiler, we were pleased to find that FreeTTS runs two to four times faster than its native-C counterpart, Flite. Clearly, it would be possible for us to roll some of these optimizations back into Flite with the likely result of improving Flite's performance to levels similar to FreeTTS. The lack of Java platform features such as garbage collection and high-performance collection utilities, however, makes performing these optimizations in Flite much more time consuming from a programming point of view.
- Daum, B. (2006). Professional Eclipse 3 for Java Developers. Wrox professional guides. Wiley. pp. 73–75. ISBN 978-0-470-02162-0.
- Zhuk, J. (2004). Integration-Ready Architecture and Design: Software Engineering with XML, Java, .NET, Wireless, Speech, and Knowledge Technologies. Cambridge University Press. pp. 134–135. ISBN 978-0-521-52583-1.
- Ao, S.I.; Rieger, B.B.; Amouzegar, M. (2010). Machine Learning and Systems Engineering. Lecture Notes in Electrical Engineering. Springer Netherlands. pp. 363–364. ISBN 978-90-481-9419-3.