The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 06, 1993
Filed:
May. 31, 1991
Robert W Moses, Seattle, WA (US);
Raymond S Miller, Seattle, WA (US);
Charles H Hustig, Hudson, WI (US);
Donald W Moses, Eagan, MN (US);
Robert S Bradford, Woodland Hills, CA (US);
Jeffrey L Ward, Hudson, WI (US);
Wayne P Olson, River Falls, WI (US);
Janice L Cox, St. Paul, MN (US);
James M Kresse, Marlton, NJ (US);
Wadia Digital Corporation, River Falls, WI (US);
Abstract
A method and system is provided for a digital audio system to reconstruct a digital audio signal using time domain interpolation and direct power digital-to-analog conversion. A signal processor performs the time domain interpolation on an original digital audio signal to allow for the proper recreation of the original audio signal and a direct power output digital-to-analog converter generates an analog power audio output signal from the interpolated digital audio signal that can directly drive a speaker to produce the sound waves represented by the audio output signal. The signal processor and direct power output digital-to-analog converter allow a digital audio system to more precisely reconstruct an analog power output audio signal from a digital audio signal such that there is no need for further amplification of the audio output signal and such that there will be no perceptible difference between the reconstructed digital signal and the original analog signal.