A SYSTEM FOR AUGMENTATIVE AND ALTERNATIVE COMMUNICATION FOR PEOPLE WITH SEVERE SPEECH AND MOTOR DISABILITIES

摘要

The present invention relates to a system and method for augmentative and alternative communication (AAC) aidforpeople with severe speech and motor disabilities. The usability of such AAC systems is currently limited due to the lack of adaptive and user-centered approaches leading to low accuracy and the need for frequent recalibration. The present invention relates to a system and method for the adaptation (over time) of the dwell time in asynchronous mode and the fixed interval (trial period)in synchronous mode using a gaze based virtual keyboards. The present invention also relates to the use of a gaze basedvirtual keyboard system which is designed for a structurally complex language and optimized for multimodality involving several portable, non-invasive, and low- cost input devices including a computer mouse; a touch screen; an eyetracker or an eye-tracking device; a surface electromyography; and an access soft-switch. This invention is based on a menu driven /selection approach with 10 commands providing access to type 88 different characters of the Hindi language along with delete, clear-all, and go-back commands for corrections. The current invention relates to a first gaze based virtual keyboard system with multimodal input from various input devices, which aims to work for the Hindi language and which can be extended to various other complex language systems.