A voice-based input system for embedded applications with constrained operating conditions

Abstract

This paper presents a voice-based input mechanism for embedded applications with limited computing power and requiring only a small set of inputs, but with the user constrained in not being able to user her or his hands. The requirement of designing for embedded systems, which places a strict upper limit on available computing power, in addition to the restriction on haptic feedback, makes designing a suitable interface a unique challenge. The proposed solution relies on an ingenious extension of Voice Activity Detection providing inherent disturbance immunity, and incorporates feedback to the user to make selection of the input easier. This input scheme is being tested for a unique system for cleansing immobile patients via nozzle-fitted gloves worn by an operator on both hands. The design calls for the operator being able to control the flow of soap, water, or a stream of hot air from the nozzles, even with both hands engaged in cleaning the patient using the gloves.