Speech recognition from overlapping frequency bands with output data reduction

摘要

A speech recognition feature extractor includesa time-to-frequency domain transformer for generating spectral values in the frequency domain from a speech signal;a partitioning means for generating a first set and an additional set of spectral values in the frequency domain;a first feature generator for generating a first group of speech features using the first set of spectral values;a additional feature generator for generating an additional group of speech features using the additional set of spectral values; the feature generators arranged to operate in parallel,an assembler for assembling an output set of speech features from at least one speech feature from the first group of speech features and at least one speech feature from the additional group of speech features, and an anti-aliasing and sampling rate reduction block, where the first and the additional set of spectral values comprise at least one common spectral value.