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. 20, 2018
Filed:
Oct. 26, 2016
Teac Corporation, Tokyo, JP;
Hirotoshi Shimada, Tokyo, JP;
Shigeyuki Adachi, Tokyo, JP;
TEAC Corporation, Tokyo, JP;
Abstract
A multi-band limiter, a sound recording apparatus, and a program are provided having a multi-band limit function with a flat frequency characteristic while removing a dead zone of a multi-band limiter. A cross-over filter unit divides an input sound signal into a low-band component, a middle-band component, and a high-band component so that the adjacent bands cross at −6 dB. An overlap filter unit includes a low-band filter element, a middle-band filter element, and a high-band filter element that respectively divide the input sound signal into a low-band component, a middle-band component, and a high-band component, and applies a limit process to divide the input sound signal in such a manner that the low-band component and the middle-band component overlap each other and the middle-band component and the high-band component overlap each other by setting a high-band side cutoff frequency of the low-band filter element to be greater than or equal to a low-band side cutoff frequency of the middle-band filter element and setting a high-band side cutoff frequency of the middle-band filter element to be greater than or equal to a low-band side cutoff frequency of the high-band filter element, and set a control gain by a CG for each band, and an adder combines the components.