Sound signal processing circuit which independently calculates l

Details Sound signal processing circuit which independently calculates l Sound signal processing circuit which independently calculates l

1996-07-15

1999-03-30

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704204, 704229, 375240, 341 50, G10L 302

Patent

active

058901078

ABSTRACT:
A sound signal processing circuit which independently calculates left and right mask levels of sub-band sound samples. A fast Fourier transform circuit performs a fast Fourier transform on input sound samples, and outputs first power spectrum samples decreased to one-half the input sound samples. A sub-sampling circuit produces a prescribed number of second power spectrum samples by sub-sampling processing of adding power spectrum samples by a prescribed number to make a single spectrum. A mask calculating circuit calculates a mask level of second power spectrum samples by determining a contour expressed in a prescribed unit mask function for every second power spectrum sample as a mask for every power spectrum sample, and adds the masks of the respective power spectrum samples.

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