Since January 1993, we have been working to refine and extend
Sphinx-I1 technologies in order to develop practical speech
recognition at Microsoft. The result of that work has been the
Whisper (Windows Highly Intelligent Speech Recognizer).
Whisper represents significantly improved recognition efficiency,
usability, and accuracy, when compared with the Sphinx-I1
system. In addition Whisper offers speech input capabilities for
Microsoft Windows@ and can be scaled to meet different PC
platform configurations. It provides features such as continuous
speech recognition, speaker-independence, on-line adaptation,
noise robustness, dynamic vocabularies and grammars. For typical
Windows@ Command-and-Control applications (less than 1,000
words), Whisper provides a software only solution on PCs
equipped with a 486DX, 4MB of memory, and a standard sound
card and a desk-top microphone.