Chris Ball

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The arithmetic-coding-based communication system, Dasher, can be driven by a one-dimensional continuous signal. A belt-mounted breath-mouse, delivering a signal related to lung volume, enables a user to communicate by breath alone. With practice, an expert user can write English at 15 words per minute. Dasher is a communication system based on a beautiful(More)
The arithmetic-coding-based communication system, Dasher, can be driven by a single switch. In MacKay et al. (2004), we proposed two versions of one-button Dasher, 'static' and 'dynamic', aimed at a theoretical model of a user who can click with timing precision g, and who requires a recovery time D between clicks. While developing and testing those two(More)
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