Digital self-adapting graphic equalizer and method

Details Digital self-adapting graphic equalizer and method Digital self-adapting graphic equalizer and method

2006-08-15

2006-08-15

Ramakrishnaiah, Melur (Department: 2643)

Electrical audio signal processing systems and devices

Including frequency control

Having automatic equalizer circuit

C381S094200, C381S094300

Reexamination Certificate

active

07092537

ABSTRACT:
A self-adaptive graphic equalizer operable to equalize the affects of an audio system on an audio signal includes an adaptive graphic equalizer having a plurality of equalizing filters, where the plurality of equalizing filters have different center frequencies equidistant from one another and spanning a predetermined audio bandwidth. Each equalizing filter is operable to filter an ithsub-band of the audio signal. A plurality of first filters are coupled to the audio system, each first filter is operable to filter an ithsub-band of an output signal of the audio system. A plurality of second filters are operable to filter an ithsub-band of the audio signal. A gain adjuster is operable to adjust the ithsub-band of the adaptive graphic equalizer in response to a difference in the ithsub-band of the filtered output signal from the plurality of first filters and the ithsub-band of the filtered audio signal from the plurality of second filters.

REFERENCES:
patent: 4340780 (1982-07-01), Odlen
patent: 4610024 (1986-09-01), Schulhof

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