Digital audio equalizer

Details Digital audio equalizer Digital audio equalizer

1991-06-14

1993-03-16

Dwyer, James L.

Electrical audio signal processing systems and devices

Including frequency control

Having automatic equalizer circuit

381 63, H03G 500, H03G 300

Patent

active

051951410

ABSTRACT:
There is disclosed a digital audio equalizer comprising an analog/digital (A/D) converter for converting an analog audio signal into a digital audio data, a digital interface receiver for demodulating the digital data that have been modulated into a digital audio interface format into the original audio data, a signal input select switch for selecting one of the outputs of the A/D converter and digital interface receiver, a digital signal processor for receiving the output of the signal input select switch to digitally process equalizing function, a microcomputer for controlling the digital signal processor, a key input circuit for controlling the operation of the microcomputer, a state display circuit for displaying the parameters of the equalizer, and a digital/analog (D/A) converter for converting the digital output signals of the digital signal processor into analog audio signals.

REFERENCES:
patent: 4661982 (1987-04-01), Kitazato et al.
patent: 4706291 (1987-11-01), Kakubo et al.
patent: 4893316 (1990-01-01), Janc et al.
patent: 4991218 (1991-02-01), Kramer
patent: 5016280 (1991-05-01), Engebretson et al.
patent: 5091951 (1992-02-01), Ida et al.

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