Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1997-10-27
2000-05-30
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704256, 704243, 704251, H04B 166, G10L 100
Patent
active
060701366
ABSTRACT:
A speech recognition system utilizes both matrix and vector quantizers as front ends to a second stage speech classifier. Matrix quantization exploits input signal information in both frequency and time domains, and the vector quantizer primarily operates on frequency domain information. However, in some circumstances, time domain information may be substantially limited which may introduce error into the matrix quantization. Information derived from vector quantization may be utilized by a hybrid decision generator to error compensate information derived from matrix quantization. Additionally, fuzz methods of quantization and robust distance measures may be introduced to also enhance speech recognition accuracy. Furthermore, other speech classification stages may be used, such as hidden Markov models which introduce probabilistic processes to further enhance speech recognition accuracy. Multiple codebooks may also be combined to form single respective codebooks for matrix and vector quantization to lessen the demand on processing resources.
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Asghar Safdar M.
Cong Lin
Abebe Daniel
Advanced Micro Devices , Inc.
Chambers Kent B.
Hudspeth David R.
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