PREMBLE:
This paper was mainly intended for the blind people who could not make
use of computer efficienly, who could just interact with computer only through the braille
display or the knowledge of
typing. In order to facilitate them to constrict the vulnerabilities that
peep out through, while engaging with system security and data security (giving
wrong passwords) and other security threaten applications our paper could serve
as an alternative.
ABSTRACT:
The
Acronym for jaws is “Job Access with Speech” .The first part
of this paper introduces the necessity of refreshable
Braille display, device which rests on the keyboard by means of raising
dots through holes in flat. .The second part focuses
on the fundamentals of the speech synthesis which converts text to
speech, and the speech units. The third part portrays the speech production by
the vocal chords and acoustic phonetics.
The next part is dealt with the detailed description on various converted speech units (words, sylablles,
demisylablles, diphone, allophone, phoneme), the way in which these
primitive speech units are combined to form a full speech with phonetic
sounds. The process indulged in the analysis of speech signals and the
various synthesis methods, the coding of vocal tract parameters
using
Linear Predictive Coding (LPC)
synthesis with its block diagram. The fifth part is all about Automatic Speech Recognition (ASR)
principles and the stages involved in it, speech unit’s synthesis
influencing factors .The later part discusses the signal processing front end and parameterisation and their feature,
blocking and windowing.
The sixth part discusses the various speech recognition techniques,and
finally the conclusion part followed
by bibliography.
INDEX
Introduction
Why JAWS
Fundamentals of speech synthesis
Speech units
Speech
production and Acoustic units Synthesis methods 
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