Coupling device, system, and method for coupling a terminal to a generating device

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United States of America Patent

PATENT NO 5661469
SERIAL NO

08412958

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Abstract

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A coupling device for coupling a videotelephone with a video generation device. The coupling device includes (i) a first device, for detecting at least one code word contained in a signal originating from the videotelephone, (ii) a second device, coupled with the first device, for generating a control signal in response to the detected code word, and (iii) a change-over device. The change-over device is coupled with the first device and with the second device. The change-over device receives, from the video generating device, both a first video signal, coded in a first manner, and a second video signal, coded in a second manner. The change-over device then feeds, in response to a control signal, coded video signals originating from one of a number of video generating devices to the first device via the change-over device. The coupling device is readily applicable in multicast environments.

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Patent Owner(s)

Patent OwnerAddress
KONINKLIJKE PTT NEDERLAND N VSTATIONSWEG 10 9726 AC GRONINGEN 9726

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mies, Ronald Johannes Maria Leidschendam, NL 2 11
Schinkel, Dolf Albert Hillegom, NL 1 1

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