Digital graphametric equalizer

Details Digital graphametric equalizer Digital graphametric equalizer

2006-06-06

2006-06-06

Tran, Khai (Department: 2637)

Pulse or digital communications

Equalizers

Automatic

C375S229000, C375S233000, C708S300000, C333S02800T

Reexamination Certificate

active

07058126

ABSTRACT:
A graphametric equalizer has graphic and parametric equalization capabilities within a single non-redundant system. A translation function capability converts user selected inputs for center frequency, bandwidth and gain into allpass filter parameters to realize an allpass filter-based equalization filter structure capable of performing graphic and/or parametric equalization on-the-fly. The graphametric equalizer has a softening function capability to time user inputs and increment filter parameters gracefully such that the graphametric equalizer can be recharacterized with new filter parameters on-the-fly without incurring undesirable audible artifacts.

REFERENCES:
patent: 5541866 (1996-07-01), Sato et al.
patent: 5687104 (1997-11-01), Lane et al.
patent: 5694422 (1997-12-01), Kaku et al.
patent: 0932253 (1999-07-01), None
Montuschi P et al. “Division unit with Newton-Raphson approximation and digit-by-digit refinement of the quotient”. IEE Proceedings: Computers and Digital Techinques, IEE, GB, vol. 141, No. 6, Nov. 1, 1994, pp. 317-324, XP006001617 ISSN: 1350-2387 * paragraph '02.1l *.

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