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Adaptation of the ITU-T E.161 international standard as mapping layout for a wearable text-input device for the blind

Abstract:

This paper adapt ITU- T E.161 international standard and implemented on a wearable-text input device for the blind. The blind respondents were able to use the wearable-text input device even without prior knowledge to a braille. This reduced the process and learning time for a visually-impaired individual to be able to convey message. The original3×4 layout of the ITU-T E.161 was modified to fit a 5-finger setup that is used in the wearable text-input device. Several tests were done in the study. The typing speed, typing accuracy, and device accuracy was measured and in average was observed to be 19.9 characters-per-minute, 87.4% and 99.91% respectively. The learning curve projects a 30 characters-per-minute typing speed which can be achieved with further trials. Overall, the results of this study showed that a wearable text-input device based on ITU- T E.161 international standard could be a viable text-input device for the blind.