Digital audio equalizer

Details Digital audio equalizer Digital audio equalizer

1996-11-08

1999-11-16

Harvey, Minsun Oh

Electrical audio signal processing systems and devices

Including frequency control

Having automatic equalizer circuit

H03G 500

Patent

active

059871458

ABSTRACT:
A digital multi-bandpass audio equalizer which is comprised of an analog multiplexer (10), a two-channel analog-to-digital converter (12), a digital-to-analog converter (22), and a digital signal processor which is programmed to provide an arrangement consisting of combined anti-alias filters/sample rate decimators (14), memory buffers at various sample rates (16), bandpass filters (18), and "virtual" potentiometers (20), structured in such a way that the digital filter elements which are operated at low frequencies are implemented at correspondingly low sample rates in order to minimize the amount of calculation involved, maximize computational efficiency and avoid the phenomenon of "rate inversion".

REFERENCES:
patent: 5418859 (1995-05-01), Cho
1992 Kraght, "A Linear Phase Digital Equalizer . . . ".
1992 Mitchell, "Multirate Filters . . . ".

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