Video telephone

Details Video telephone Video telephone

1998-02-23

2001-06-12

Le, Huyen (Department: 2643)

Television

Two-way video and voice communication

C348S014100, C348S014030, C455S557000, C455S558000

Reexamination Certificate

active

06246430

ABSTRACT:

TECHNICAL FIELD
The present invention relates to a service for transmitting a video signal and to a video server.
BACKGROUND OF THE INVENTION
Video servers are servers which have a number of video signal stored in a memory and which transmit selected video signal to their customers on demand.
One possibility of transmitting video signals is known from U.S. Pat. No. 5,410,343. The customers inquire about video films currently available from the video server via a digital telephone network, and select one of them. The selected video signal is transmitted from the video server over a broadband additional channel of the digital telephone network, and displayed to the customer on a television set. To provide the broadband additional channel, several digital-cross connect systems are necessary. Because of the nonuniform utilization of the broadband additional channels, the transmission capacity of the digital telephone network is not optimally utilized. Moreover, the selection of the video film involves a considerable amount of technical complexity, since it requires a protocol adaptation facility, a so-called video gateway, and a network management system.
DISCLOSURE OF INVENTION
It is therefore an object of the invention to transmit video signal with less technical complexity.
According to the present invention, a video telephone which has a slot for a chip card and a card-reading device and which can be put into operation by means of a chip card with a ciode dependent on a video server, has the capability to determine a call number of the video server via the card-reading device from the code dependent on the video server, and wherein establishment of a switched connection to the video server is made possible via the card-reading device by automatic dialing of the call number of the video server.
A special advantage of the invention is that video-on-demand service is made possible via an existing digital telephone network.
Another advantage of the invention is that video-on-demand service can also be offered in moving objects.
A further advantage is that through the additional service, the functionality of the integrated services digital network is extended, so that the network is optimally utilized and becomes more attractive.
These and other objects, features and advantages of the present invention will become more apparent in light of the detailed description of a best mode embodiment thereof, as illustrated in the accompanying drawing.


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