Speech Dasher is a free text entry interface in which users first speak their desired text and then use the zooming interface Dasher to confirm and correct the recognition result.
- Entering text using Speech Dasher begins with the user speaking their desired sentence to a continuous speech recognition engine.
- A word lattice is generated from the recognizer’s results and then expanded to cover likely recognition errors.
- The expanded lattice is used to estimate the probability of what letter the user might enter next based on both the recognition results and what has already been entered.
- The interface also integrates a default language model, allowing the user to enter words missed completely by the recognizer.
- These probability estimates are then used in the continuous gestured-based interface Dasher to allow the user to confirm and correct their dictated sentence.
- After several hours of practice, users wrote using Speech Dasher at 40 (corrected) words per minute.
- Users did this using only speech and the direction of their gaze (obtained via an eye tracker).
- Despite an initial recognition word error rate of 22%, users corrected virtually all recognition errors.
- Runs on Microsoft Windows.
This product is a freeware software available for free download off of the internet from Keith Vertanen or search for: “open source freeware Speech Dasher”.