Method for extracting voice signal features and related voice recognition system
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United States of America Patent
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Issued Date -
Oct 9, 2003
app pub date -
Apr 1, 2003
filing date -
Apr 9, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for extracting sampled voice signal features for an automatic voice recognition system essentially comprises the following steps: decomposing the sampled voice signal to obtain decomposition of the signal into a plurality of subbands by means of a digital bank of filters whose structure is that of a fully developed, symmetric binary tree (20), performing a discrete wavelet transform, each node (21, 23, . . . ) of the binary tree being associated to one of the subbands; employing all the subbands obtained by means of the binary tree (20) to generate the corresponding parameters representing the features extracted from the sampled voice signal.
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