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:
Mar. 10, 1998
Filed:
Feb. 24, 1995
Applicant:
Inventor:
Vijay Rangan Raman, Greenwich, CT (US);
Assignee:
Nynex Science & Technology, White Plains, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
381 942 ; 395-235 ; 395-236 ; 395-237 ; 395-242 ;
Abstract
What is disclosed is a method and system for improving noise cancellation in a signal containing speech by classifying noise frames by their characteristics, and estimating noise based on only one classification at a time. In some instances, the disclosed method further directs the noise estimator and noise canceller to utilize only a designated noise class. Also, the disclosed system can automatically switch between pre-processing and post-processing modes in response to detected changes in acoustic environments.