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Overview:
Speech recognition begins when a person speaks into an electronic
device, such as a microphone. The microphone converts the speech
to an analog signal, which is then converted to a digital signal to
be stored on a computer. A
speech recognizer,
a program running on the
computer, attempts to decode the meaning of the speech signal.
Certain
features
of a person's speech are needed by the speech recognizer to decode
the signal. These features must be numerically measured and stored
in a form the recognizer can understand. The process of measuring
the features needed by a speech recognizer is called
feature extraction.
Continue to
Section 3.1
for a theoretical overview of the feature extraction process.
Contents:
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