SIGN LANGUAGE

Abstract

Usually a human interaction focuses on the sound
world, where the communication is based on the speech and in
which most information is conveyed via voice and other
sounds. However, there are people who live in the world of
silence. For them nothing can be heard, as they are hearing
impaired. For all of them a voice communication is impossible
or troublesome. Hence they have invented a sign language. The
sign language consists of a grammar and a vocabulary. Usually
the grammar is significantly different to the spoken and
written languages. Whereas the vocabulary is composed of
many hand gestures and hand movements which convey the
most important information, but which are supported by the
whole body movement and facial expressions. Considering the
differences in the way the hearing impaired observe the world,
they encounter huge difficulties while learning and using the
writing language, which is so common in daily communication.
Since this sign language cannot be understand by others, we
are in need of systems which can understand sign language.
The existing systems handle that task not appropriate and
accurate. We introduce the concept of a chat for the sign
language based communication, which overcomes the
deficiencies of the existing approaches. In the current system
there is an action sensor available, this sensor has pressure
switches when any pressure is given then the pressure switch
will be closed and the signal is given to microcontroller. The
microcontroller senses the signal coming from the pressure
switch and it understands the switch position and it sends the
command signal to the computer through RS232 cable. The
RS232 cable is used to convert microcontroller understandable
signal to computer understandable signal. As soon as the
computer gets the signal the program written in the computer
will detect the particular word and it will be played at the same
instant. That’s how the sign language is converted in to voice
language.