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:
Jan. 29, 2013
Filed:
Aug. 30, 2012
Jianming J Song, Barrington, IL (US);
John C Johnson, Spring Grove, IL (US);
Jianming J Song, Barrington, IL (US);
John C Johnson, Spring Grove, IL (US);
Motorola Mobility LLC, Libertyville, IL (US);
Abstract
A method () and apparatus () seeks to improve the intelligibility of speech emitted into a noisy environment. Formants are identified () and perceptual frequency scale band is selected () that includes at least one of the identified formants. The SNR in each band is compared () to a threshold and, if the SNR for that band is less than the threshold, the method increases a formant enhancement gain for that band. A set of high pass filter gains () is combined () with the formant enhancement gains yielding combined gains that are then clipped (), scaled () according to a total SNR, normalized (), smoothed across time () and frequency (), and used to reconstruct () an audio signal.