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:
Aug. 11, 2020
Filed:
Mar. 27, 2014
Nec Corporation, Minato-ku, Tokyo, JP;
Masanori Kato, Tokyo, JP;
Akihiko Sugiyama, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
This invention provides a signal processing apparatus for changing an input sound into an easy-to-hear sound. The signal processing apparatus includes a transformer that transforms an input signal into an amplitude component signal in a frequency domain, a stationary component estimator that estimates a stationary component signal having a frequency spectrum with a stationary characteristic based on the amplitude component signal in the frequency domain, a replacement unit that generates a new amplitude component signal using the amplitude component signal obtained by the transformer and the stationary component signal, and replaces the amplitude component signal by the new amplitude component signal, and an inverse transformer that inversely transforms the new amplitude component signal into an enhanced signal.