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:
Feb. 17, 2009
Filed:
Aug. 08, 2002
Doill Jung, Seoul, KR;
Hunseok Seo, Seoul, KR;
Doill Jung, Seoul, KR;
Hunseok Seo, Seoul, KR;
Amusetec Co., Ltd., , KR;
Abstract
A method and apparatus for detecting a pitch using frequency analysis are provided. An externally input digital signal is analyzed into frequency component values at predetermined time intervals, and positions of peaks of the digital signal are detected based on the frequency component values. It is determined whether a frequency at a maximum peak position among the peak positions is a pitch or a n-order harmonic frequency of the pitch to detect a pitch. Then, the range of the pitch is determined based on the range of a harmonic frequency of the detected pitch. Accordingly, an error range for the pitch detected using frequency analysis is minimized, thereby more exactly detecting a pitch when the pitch is detected using the frequency analysis.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile