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:
Mar. 08, 2016
Filed:
Oct. 19, 2011
Mitsutaka Gotoh, Hamamatsu, JP;
Mizuyuki Shirai, Hamamatsu, JP;
Yuji Yamashita, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
An acoustic signal's high frequency component extracted by an HPFis multiplied in a multiplierby the first coefficient to control the level of the high frequency component. The first coefficient is generated by a coefficient generation portionin accordance with the full band level of an output signal. A low frequency component extracted by an LPFis multiplied in a multiplierby the second coefficient to control the level of the low frequency component. The second coefficient is generated by a coefficient generation portionin accordance with the level of the output signal's low frequency component extracted by an LP filter. The level control of the low frequency component of the output signal and the level control of the high frequency component of the output signal are done separately, resulting in the loudness control which is suitable for the characteristic of the acoustic signal.