System and method for digital volume control

Details System and method for digital volume control System and method for digital volume control

2005-06-14

2005-06-14

Isen, Forester W. (Department: 2644)

Electrical audio signal processing systems and devices

Including amplitude or volume control

With amplitude compression/expansion

C381S108000, C381S109000, C700S094000

Reexamination Certificate

active

06907129

ABSTRACT:
A circuit and related method for digital volume control are provided, where the circuit includes a digital filter configured to process samples of an input stream in a manner that processes a previous input sample during a time interval before a subsequent input sample, and outputs a series of exponentially decaying waveforms. The result is an exponential response to a volume change made by a user, where the change feels more pleasant and natural than a conventional linear response.

REFERENCES:
patent: 5276678 (1994-01-01), Hendrickson et al.
patent: 5615234 (1997-03-01), Brooks
patent: 6456912 (2002-09-01), Raynauld et al.
patent: 6678382 (2004-01-01), Peterson
patent: 2003/0182109 (2003-09-01), Gonzalez et al.

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