Interacting with computer using ears and tongue

Abstract

Human computer interaction is concerned in the way Users (humans) interact with the computers. Some users can interact with the computer using the traditional methods of a keyboard and mouse as the main input devices and the monitor as the main output device. Due to one or another reason, some users are enable to interact with machines using a mouse and keyboard device, hence there is need for special devices. If we use computer for more time it is really difficult to sit on the chair, keeping hands continuously on the keyboard or mouse and keep watching the monitor. To relax our body and interact comfortably with computer, we need some special device or method, so that computer will understand and accept commands without keyboard or by clicking mouse. Speech Recognition System helps users who are unable to use traditional Input and Output (I/O) devices. Since four decades, man has been dreaming for an "intelligent machine" which can master the natural speech. In its simplest form, this machine should consist of two subsystems, namely Automatic Speech Recognition (ASR) and Speech Understanding (SU). The goal of ASR is to transcribe natural speech while SU is to understand the meaning of the transcription. Recognising and understanding a spoken sentence is obviously a knowledge-intensive process, which must take into account all variable information about the speech communication process, from acoustics to semantics and pragmatics.