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:
Mar. 28, 1995
Filed:
Oct. 07, 1993
Jong-il Kim, Incheon, KR;
Daewoo Electronics Co., Ltd., Seoul, KR;
Abstract
There is provided an improved apparatus and method which include precisely adjustable digital circuitries employing psychoacoustic modeling so that the results obtained have a best consistency with actual human auditory perception. The apparatus comprises a first estimator for estimating a power density spectrum of an input digital audio signal to the audio system; a detector for determining a masking threshold depending on the power density spectrum of the input digital audio signal as an audible limit reflecting human auditory faculty; a second estimator for estimating a power density spectrum of an error signal representative of the difference between the input digital audio signal and its output digital audio signal from the audio system; and a third estimator for estimating the power density spectrum of the error signal which exceed the masking threshold and for calculating a perceptual spectrum distance(PSD) representative of the audio distortion.