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. 16, 2016
Filed:
Sep. 06, 2012
Masakiyo Tanaka, Kawasaki, JP;
Shusaku Ito, Fukuoka, JP;
Masakiyo Tanaka, Kawasaki, JP;
Shusaku Ito, Fukuoka, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A hum noise detection device includes: a frequency conversion unit () configured to perform a frequency converting process at a constant time interval on an input signal, and converting the input signal into a frequency signal; a peak frequency calculation unit () configured to calculate a stationary peak frequency based on the frequency signal; a fundamental frequency estimation unit () configured to estimate a fundamental frequency of hum noise based on the stationary peak frequency; and a hum noise judgment unit () configured to judge whether or not there is hum noise in the input signal based on the estimated fundamental frequency and the stationary peak frequency.