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:
Dec. 23, 2014
Filed:
Sep. 24, 2009
Shinya Sakurada, Hamamatsu, JP;
Takuro Sone, Hamamatsu, JP;
Takaya Kakizaki, Hamamatsu, JP;
Sachiya Sasaki, Hamamatsu, JP;
Kosuke Saito, Hamamatsu, JP;
Shinya Sakurada, Hamamatsu, JP;
Takuro Sone, Hamamatsu, JP;
Takaya Kakizaki, Hamamatsu, JP;
Sachiya Sasaki, Hamamatsu, JP;
Kosuke Saito, Hamamatsu, JP;
Yamaha Corporation, , JP;
Abstract
A pseudo noise superimposing unit superimposes a pseudo noise (M-sequence) to an audio signal picked up by a microphone and outputs the superimposed signal to an amplifying system. An calculating unit calculates a correlation value between the audio signal picked up by the microphone and the pseudo noise. The calculating unit estimates a gain of a closed loop based on the correlation value. A gain control unit suppresses a gain of the audio signal based on the estimated gain of the closed loop.