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. 08, 1997
Filed:
Mar. 30, 1995
Mario Bonja, Boisbriand, CA;
Simon John Worrall, Pointe Claire, CA;
Richard Romagnino, Montreal, CA;
Northern Telecom Limited, Montreal, CA;
Abstract
A digital video network comprises a controller and network sites each coupled to the controller via communication paths. The network sites and controller include codecs for converting between encoded signals on the communications paths and video and audio signals in the network sites and in the controller. The controller also includes at least one unit for producing a quad split video signal from four video signals supplied thereto. The coders encode four audio signal channels and audio mixing control signals in each encoded signal. The decoder in each network site decodes the audio signal channels from the encoded signal which it receives, and is responsive to the control signal in the encoded signal to mix the decoded audio signal channels in a predetermined manner to provide a continuous audio presence at the network site, independently of whether or not the video signal in the encoded signal comprises the quad split video signal.