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:
Oct. 13, 2015
Filed:
Jan. 21, 2013
Rawles Llc, Wilmington, DE (US);
Jun Yang, San Jose, CA (US);
Rawles LLC, Wilmington, DE (US);
Abstract
An audio-based system may perform automatic noise reduction to enhance speech intelligibility in an audio signal. Described techniques include initially analyzing audio frames in the time domain to identify frames having relatively low power levels. Those frames are then further analyzed in the frequency domain to estimate noise. For example, the initially identified frames may be analyzed at each of multiple frequencies to detect the lowest exhibited power at each of those frequencies. The lowest power values are used as an estimation of noise across the frequency spectrum, and as the basis for calculating a spectral gain for filtering the audio signal in the frequency domain.