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:
Sep. 21, 1993
Filed:
Sep. 11, 1990
Richard C Cabot, Portland, OR (US);
Audio Precision, Inc., Beaverton, OR (US);
Abstract
A method and apparatus for testing a digital signal processing system for the occurrence of bit errors. A mathematically-predictable test signal is applied to the input of a digital signal processing system The test signal components are removed from the output signal of the system by filtering, curve fitting or other techniques, leaving a resultant signal. The peak amplitude of the resultant signal is measured as an indication of the occurrence of errors. A time integrated measure of the resultant signal is made as an indication of the amount of noise and distortion artifacts. The peak amplitude is compared to a reference or the time integrated measure to identify errors. A histogram of the resultant signal amplitude may also be produced.