Multiplex communications – Wide area network – Packet switching
Patent
1994-06-06
1996-05-07
Lim, Krisna
Multiplex communications
Wide area network
Packet switching
370 857, 370 951, H04J 317
Patent
active
055155111
ABSTRACT:
A multimedia distribution network combines the flexibility of digital video and digital networks with the low cost, high bandwidth, and isochronous capabilities of analog video distribution. At the heart of the network is a hybrid digital/analog multimedia hub, called a C-box, which provides connectivity to digital networks, both local area and wide area, with the necessary video compression and decompression, composition engines for multiple video streams and analog/digital conversions of the multiple video streams for connectivity to an analog video distribution network for delivery to end user workstations. The C-box receives multiple compressed digital video streams, decompresses the video streams, converts the decompressed video streams to analog, and delivers the converted analog signals to workstations via an analog cable television (CATV) network. The amount of video processing (e.g., compression and decompression) power required is proportional to the number of active video streams instead of the number of attached end user workstations. The analog channels over which the converted analog signals are transmitted are dynamically allocated, and once the analog signals have been transmitted to a requesting client terminal, the channels are released for reuse.
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Nguyen Tam M.
Rana Deepak
Ruiz Antonio
Willner Barry E.
Cameron Douglas W.
International Business Machines - Corporation
Lim Krisna
LandOfFree
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