IT Pro Verdict
Impressive recognition performance and a vast array of features make Dragon Dictate 2.0 a flexible and highly capable speech recognition application for Mac users, but it’s a shame about the Mac OS price premium.
The idea of being able to talk to a computer rather than type has long been a pipe dream, and not just for people who can't get to grips with a keyboard. Sadly, the technology has yet to reach a point where people can converse freely with a PC and have it understand what they're saying, but speech recognition for more mundane dictation purposes has been possible for quite a few years now. Nuance leads the field for desktop speech recognition and Dragon Dictate 2.0 is the latest version of its software for Mac OS X.
As the back of the Dragon Dictate 2.0 box points out, most people can talk much faster than they can type, but speech recognition isn't quite so quick to set up as just plugging in a keyboard. Automated telephone answering systems may be able to respond to a limited selection of spoken commands from just about any caller, but the speech recognition offered by Dragon Dictate is designed to recognise open-ended verbalisation for text transcription purposes, and so requires some initial voice training with the person using it.
Although speech recognition software employs a range of sophisticated audio, contextual and statistical analysis techniques to cope with homonyms and other tricky aspects of language, the basic idea involves matching elements of speech to the contents of a word database. By asking the user to speak the word "dog", for example, the software knows that whatever noise the user makes in response can always be interpreted as "dog" and displayed in type accordingly. This is where voice training comes reading on-screen text aloud so that the speech recognition software can get a measure of how a user says certain words, the cadence of their speech, and so on.
