Circuit for digital processing of audio signals

Details Circuit for digital processing of audio signals Circuit for digital processing of audio signals

1994-01-18

1996-02-13

Coles, Sr., Edward L.

Electrical audio signal processing systems and devices

Vehicle

H04B 100

Patent

active

054917557

ABSTRACT:
In a circuit for digital processing of audio signals in a radio receiver, preferably in a car radio, the audio signals pass through a digital filter designed as a tone control, whose frequency response can be controlled with supplied coefficients, and a volume control, whose transmission factor can be controlled with supplied control signals. If the high and/or low frequencies are raised, the transmission factor of the filter at medium frequencies can be correspondingly lowered. Volume control compensates for the reduction. The volume control may contain a digital and an analog portion.

REFERENCES:
patent: 3293364 (1966-12-01), Richter
patent: 5127058 (1992-06-01), Yamasaki
patent: 5157623 (1992-10-01), Hayashi
patent: 5257292 (1993-10-01), Sauvogerd et al.
patent: 5271063 (1993-12-01), d'Arc
Patent Abstracts of Japan, vol. 13, No. 150 (E-742), Apr. 12, 1989 & JP-A-63 309 011 Matsushita Electric.
Patent Abstracts of Japan, vol. 12, No. 189 (E-616), Jun. 2, 1988 & JP-A-62 292 009 (Fujitsu Ten).
ICASSP 86 Proceedings. vol. 3 of 4 Apr. 1986, IEEE New York US, pp. 1537-1540, Application Specific Integrated Filters For HIFI Digital Audio Signal Processing By J. Van Ginderdeuren, et al.

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