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Home Audio Signal Processing Adaptive-graphic-equalizer-and-radio-using-same

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 Adaptive graphic equalizer and radio using same

Details
Inventors: Ecklund, Lawrence M.; Buchwald, Gregory J.; Parmelee, Steven G.;
Assignee: Motorola, Inc. (Schaumburg, IL)
Primary Examiner: Pham; Chi H.
Assistant Examiner:
Attorney, Agent or Firm: Parmelee; Steven G.

An adaptive graphic equalizer (200, 400) has various ordinarily fixed parameters (such as center frequencies, filter bandwidths, and step response sensitivity) that are automatically altered to suit a particular audio source. In one embodiment, a radio (100) includes the graphic equalizer, and such adjustments are automatically made depending upon whether the user has selected the AM or FM reception band.

DETAILED DESCRIPTION This need and others are substantially met through provision of the audio processing device disclosed herein.
The device includes generally an input, a source selector, and a multiband graphic equalizer responsive to the source selector.
The input couples to receive a signal to be processed.
The source selector couples to the input and enables selection of a particular audio source.
The center frequencies of the multiband graphic equalizer are responsive to selection of a particular audio source, and are automatically adjusted in response thereto.
In one embodiment of the invention, the source selector allows selection between at least two different radio frequency reception bands.
In another embodiment of the invention, the device includes a display that also responds to the source selector by displaying current information regarding the center frequencies for the multiband graphic equalizer.
In yet another embodiment of the invention, the filter bandwidths and/or step response for the graphic equalizer can also be automatically adjusted in response to selection of a particular audio source.
In yet another embodiment of the invention, a radio can embody the automatically adjustable graphic equalizer, such that selection of a particular radio band will cause automatic adjustment of the graphic equalizer, to thereby configure the graphic equalizer in a manner best accommodating to the radio band selected.



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