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:
Nov. 05, 2002
Filed:
Nov. 23, 1999
Applicant:
Inventors:
Brian L. Evans, Allen, TX (US);
Louis Dominic Oliveira, San Diego, CA (US);
Wade L. Heimbigner, Poway, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/18 ;
U.S. Cl.
CPC ...
H03M 1/18 ;
Abstract
An Automatic Gain Control System for voice codecs used in a digital wireless handset or in any other environment where there is a large amount of background noise. The invention utilizes the processing power available in Digital Signal Processor to adaptively adjust the gain of amplifier and filter in the transmit channel to eliminate audio distortion in a “loud talker” environment. The gain correction information is transmitted by the DSP to the digital filter and PCM I/O block in the 3 unused bits of the 16 bit PCM data word thus eliminating any additional connections.