A Prototype Scanning System with an Ambiguous Keyboard and a Predictive Disambiguation Algorithm
This paper presents a prototype single-switch scanning system with a four-key ambiguous keyboard. The keyboard consists of only three keys for letters and an additional key for editing and extra functions. The letter-to-key assignment is based on the shapes of lowercase consonants, and vowels are alphabetically distributed among the keys. An adaptation of the "one-key with disambiguation" algorithm has been used to increase text entry speed. The system has been implemented for Spanish language.
KeywordsAmbiguous Keyboards Scanning Systems Text Entry AAC
Unable to display preview. Download preview PDF.
- 1.Miró-Borrás, J., Bernabeu-Soler, P.: Text Entry in the E-Commerce Age: Two Proposals for the Severely Handicapped. J. Theor. Appl. Electron. Commer. Res. 4, 101–112 (2009)Google Scholar
- 2.MacKenzie, I.S.: The one-key challenge: Searching for a fast one-key text entry method. In: ACM Conference on Computers and Accessibility, pp. 91–98 (2009)Google Scholar
- 3.Harbusch, K., Kühn, M.: Towards an adaptive communication aid with text input from ambiguous keyboards. In: 10th Conference on European Chapter of the Association for Computational Linguistics, pp. 207–210 (2003)Google Scholar
- 4.Belatar, M., Poirier, F.: Text Entry on Mobile Devices for Users with Severe Motor Impairments: HandiGlyph, a Primitive Shapes Based Onscreen Keyboard. In: 10th Annual ACM SIGACCESS Conference on Assistive Technologies, pp. 209–216 (2008)Google Scholar
- 5.MacKenzie, I.S., Tanaka-Ishii, K.: Text entry using a small number of buttons. In: Text Entry Systems: Mobility, Accessibility, Universality, pp. 105–121. Morgan Kaufmann, San Francisco (2007)Google Scholar
- 7.Miró-Borrás, J., Bernabeu-Soler, P., Llinares, R., Igual, J.: An Ambiguous Keyboard based on “Character Graphical Association” for the Severely Physically Handicapped. In: ICCHP 2010, Springer, Heidelberg (2010)Google Scholar