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:
Apr. 14, 1987
Filed:
Oct. 29, 1984
Applicant:
Inventor:
To R Hsing, Sudbury, MA (US);
Assignee:
GTE Laboratories Incorporated, Waltham, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04J / ; H04M / ;
U.S. Cl.
CPC ...
370 62 ; 379202 ;
Abstract
In a teleconferencing system activity levels of digital voice signals are compared over activity selection times and the signals are multiplied, over frame delays, by predetermined constants dependent on the relative levels of activity. The most active signal is multiplied by a constant of at least about 0.8, so that signal dominates through a frame delay, but the frame delays are sufficiently short that multiple speakers can be understood from the summed signal. No speaker maintains dominance for a sufficiently long time to substantially suppress speech of others.