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:
Jun. 09, 2015
Filed:
Aug. 28, 2013
The United States of America, As Represented BY the Secretary of the Army, Washington, DC (US);
Wei Su, Bel Air, MD (US);
Muhammed Karim, Ocean Township, NJ (US);
The United States of America, as represented by the Secretary of the Army, Washington, DC (US);
Abstract
While a dual tone multi-frequency (DTMF) signal can be easily processed if cleanly obtained, difficulties can arise if the DTMF signal is not cleanly obtained. In one example, part of the signal can be cleanly obtained, but part of the signal can be obstructed. In order to determine the content of the DTMF signal the parts that are cleanly obtained can be compared with known DTMF signals, such as DTMF signals that correspond with buttons on a telephone keypad. A classification of a closest matching known DTMF signal can be identified and that classification can be assigned to the partially obtained DTMF signal. Thus, without clearly obtaining the whole DTMF signal a content of the DTMF signal can be ascertained.