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:
Sep. 09, 2003
Filed:
Apr. 19, 1999
James Brian Piket, Gilbert, AZ (US);
Ernest Pei-Ching Chen, Gilbert, AZ (US);
Christopher Wayne Springfield, Gilbert, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A communications transmitter which operates as a mobile telephone incorporates a noise suppressor ( FIG. ) which reduces the background noise in the transmitted voice signal. An external voice activity detector ( ), which operates in conjunction with a noise suppressor ( ) estimates the signal power of the incoming voice signal and compares this to an estimated noise floor. As a result of this comparison, a voice activity factor is applied to an updated noise floor estimate to create a voice activity threshold estimate. The voice activity threshold estimate is then used to decide whether or not to the force noise suppressor ( ) to perform an update of a noise content estimate of the incoming voice signal.