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:
Dec. 24, 2013
Filed:
Jan. 28, 2013
Carlos Avendano, Campbell, CA (US);
Marios Athineos, San Francisco, CA (US);
Carlos Avendano, Campbell, CA (US);
Marios Athineos, San Francisco, CA (US);
Audience, Inc., Mountain View, CA (US);
Abstract
Disclosed are methods and corresponding systems for audio processing of audio signals after applying a noise reduction procedure such as noise cancellation and/or noise suppression, according to various embodiments. A method may include calculating spectral envelopes for corresponding samples of an initial audio signal and the audio signal transformed by application of the noise cancellation and/or suppression procedure. Multiple spectral envelope interpolations may be calculated between these two spectral envelopes. The interpolations may be compared to predetermined reference spectral envelopes associated with predefined clean reference speech. One of the generated interpolations, which is the closest to one of the predetermined reference spectral envelopes, may be selected. The selected interpolation may be used for restoration of the transformed audio signal such that at least a part of the frequency spectrum of the transformed audio signal is modified to the levels of the selected interpolation.