Method and apparatus for frequency analysis of telephone signals

Details Method and apparatus for frequency analysis of telephone signals Method and apparatus for frequency analysis of telephone signals

1989-05-15

1990-06-05

Kemeny, Emanuel S.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 46, 364726, 364485, G10L 500

Patent

active

049320629

ABSTRACT:
For faster realtime analysis related to Discrete Fourier Transform (DFT), prestored pre-multiplied values of amplitude times cosine and sine functions are used. Method and apparatus for determining the content of a predetermined frequency bin f in the frequency spectrum of a signal and, in particular, a signal which occurs in a telephone network, includes the step of storing on a storage means:

REFERENCES:
patent: 4016544 (1977-04-01), Morita et al.
patent: 4310838 (1982-01-01), Juso et al.
patent: 4635048 (1987-01-01), Nishi et al.
patent: 4689613 (1987-08-01), Ikeda
patent: 4724431 (1988-02-01), Holtey et al.

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