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. 27, 2013
Filed:
Mar. 06, 2012
Applicants:
Xueman LI, Burnaby, CA;
Frank Linseisen, Vancouver, CA;
Kyle Macdonald, Vancouver, CA;
Inventors:
Assignee:
QNX Software Systems Limited, Kanata, Ontario, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03G 3/20 (2006.01); G01L 19/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A noise injection system adds comfort noise to an audio signal. The system includes a background noise estimator that determines a spectral content of a background noise associated with the audio signal. A comfort noise generator generates a comfort noise signal having a random phase. A gain circuit adjusts the comfort noise signal based on the spectral content of the background noise. A combining circuit combines a gain-adjusted comfort noise signal and the audio signal to generate an output signal.