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:
Jul. 29, 1980
Filed:
Sep. 27, 1978
Applicant:
Inventor:
Michael Onufry, Jr, Brookeville, MD (US);
Assignee:
Communications Satellite Corporation, Washington, DC (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ; H04M / ;
U.S. Cl.
CPC ...
1791702 ; 179 / ;
Abstract
An audio echo control unit for a video teleconference system is provided with a suppression attack time which is a function of the microphone-to-audio speaker distance and a suppression hangover time which is a function of the room characteristics. Echo which results from a double-talk condition is eliminated by removing the break-in capability, and receive signal level modulation is eliminated by removing any variable loss devices from the transmission path.