Data processing: speech signal processing – linguistics – language – Speech signal processing – Recognition
Patent
1997-06-27
2000-02-29
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
Recognition
G10L 708
Patent
active
060321164
ABSTRACT:
One embodiment of a speech recognition system is organized with speech input signal preprocessing and feature extraction followed by a fuzzy matrix quantizer (FMQ). Frames of the speech input signal are represented by a vector .function. of line spectral pair frequencies and are fuzzy matrix quantized to respective a vector .function. entries in a codebook of the FMQ. A distance measure between .function. and .function., d(.function.,.function.), is defined as ##EQU1## where the constants .alpha..sub.1, a.sub.2, .beta..sub.1 and .beta..sub.2 are set to substantially minimize quantization error, and e.sub.i is the error power spectrum of the speech input signal and a predicted speech input signal at the ith line spectral pair frequency of the speech input signal. The speech recognition system may also include hidden Markov models and neural networks, such as a multilevel perceptron neural network, speech classifiers.
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Asghar Safdar M.
Cong Lin
Advanced Micro Devices , Inc.
Chambers Kent B.
Hudspeth David R.
Storm Donald L.
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