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. 14, 1993
Filed:
May. 28, 1992
Omar Green, Riviera Beach, FL (US);
Other;
Abstract
The invention comprises a back-masking effect generator which produces, almost in real time, the simulated sound of an input audio signal being reproduced in reverse. The device digitally records the sound in packets of short duration with alternating packets being written to first and second static random access memory devices, respectively. After an initial state in which the first memory device is filled with the digitized input audio signal, the generator then continuously alternates between two other states. In one state, the second memory device is filled while the first memory device is simultaneously emptied to a digital-to-analog converter in the reverse order from which it was filled. In the other state, the first static random access memory is filled while the second memory device is simultaneously emptied to the digital-to-analog converter.