Dissertation title: "Speech recognitionProcessing
Dialog System for Database access though Telephone"
Author: Ioannis G. KARRAS
e-mail: ikarras@yahoo.com
This speaker independent recognising system application has been designed
for fast speech recognition and high recognition accuracy using a small
vocabulary up to 64 words in Greek language. The system has been evaluated
with test results. These results have been obtained by special developed
training and correcting methods based on statistics taken by experiment
observation and benchmarks. One PC has been used to repeat words with the
same characteristics as velocity animation, telephone microphone distance,
word variability etc for repeatable tests on real time to prove the real
time Word Correct Error. These tests are not possible in real time otherwise
because human been can not repeat just the same word many times in the
same way. After the optimisation of the parameter values in configuration
files, a series of programs and recording message files have been created.
These are controlled by other scripts, which run in the background to assure
the continuity of the program flow. Other scripts are responsible for the
interactive and communication features of the system. In this dissertation
is not only built a recognition system from scratch but are also investigated
faster techniques that include approximations that increase the recognition
accuracy of the system, in fast recognition speed mode, prior any further
training action.
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