| Summary: | 碩士 === 國立臺灣科技大學 === 工程技術研究所 === 83 === In this thesis we present a real-time digital speech
recognition system which consisters of a PC-486, a Dynamic
Time-Warping Algorithm(DTWA) processor, a Sound Blaster card,
and a microphone. Also, the system presented can be separated
into the following four parts: speech sampling,
preprocessing, template matching, and postprocssing. First of
all, the analog speech signal is sampled by using microphone
and Sound Blaster card, and, stored into the memory of PC-486
in digized form. Secondly, preprocessing program running on
PC-486 extracts feature vectors from the sampled speech
signal to form an input template. Then, under the control of
PC-486, the DTWA processor executes template matching between
input and reference templates. Finall, the postprocessing
program running on PC-486 obtains the recognition results
through analyzing the matching results computed by the DTWA
processor. Currently, the DTWA processor we design can
execute more than 10,000 template matching per second. With
such a performance, the digital speech recognition system
presented in this thesis has satistfied the real-time
requirement. Additionally, multiple-reference-template and
unconstrained-endoint template matching methods can be
applied easily to enhance the recognition rate.
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