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. 09, 2002
Filed:
Sep. 30, 1999
Jian-Cheng Huang, Lake Worth, FL (US);
Floyd Simpson, Lantana, FL (US);
Sunil Satyamurti, Lake Worth, FL (US);
Kenneth Finlon, Wellington, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A pitch determiner ( ) of a system controller ( ) that generates a smoothed pitch value for a current frame of a low bit rate voice message includes a pitch function generator ( ) that generates a pitch detection function (PDF) for each frame of digital samples of a voice signal, a pitch candidate selector ( ) that selects a future frame pitch candidate from a pitch detection function (PDF), and a pitch adjuster ( ) that generates the smoothed pitch value. The pitch adjuster includes a subharmonic pitch corrector ( ) that determines a future frame pitch value by performing pitch subharmonic correction of a future frame pitch candidate using a roughness factor of the frequency transformed window.