Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1996-05-31
1999-03-16
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704229, 704230, G10L 302
Patent
active
058842527
ABSTRACT:
In a speech coding apparatus, a spectral parameter calculator determines spectral parameters from an inputted speech signal, quantizes the spectral parameters, and outputs a plurality of quantization candidates. An adaptive code book determines delays with respect to each of the quantization candidates outputted from the spectral parameter calculator, generates a pitch predictive signal based on a past excitation signal for each of the delays and associating quantization candidates, and outputs a quantization candidate and a delay that provide a minimum distortion between the speech signal and the pitch predictive signal. An excitation quantizer quantizes and outputs the excitation signal of the speech signal. A gain quantizer quantizes and outputs a gain of at least one of the adaptive code book and the quantized excitation signal.
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Hudspeth David R.
NEC Corporation
Opsasnick Michael N.
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