Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1995-12-08
1998-08-25
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704204, 704203, 704225, 704229, G10L 302
Patent
active
057992703
ABSTRACT:
A speech coding system is shown, which comprises a linear transform unit 50 for executing linear transform on an input signal Si with a predetermined block length Sb and an FFT unit 10, 30 for executing Fast Fourier transform on the input signal Si with two different, i.e., large and small, block lengths, a block length setting unit 20 for calculating a predetermined block length Sb to be set in the linear transform unit 50 according to an FFT signal generated in the FFT unit 10, 30 and setting this block length in the linear transform unit 50, and a coding unit 80 for coding an intermediate signal Sm generated in the linear transform unit 50 to form and output a bit stream So. The FFT unit has a function of selecting a block length used for the Fast Fourier transform among two, i.e., large and small, block lengths according to a continuous portion of the input signal Si.
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Chawan Vijay B.
Hudspeth David R.
NEC Corporation
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