Packet-switched ring network having direct access to low and hig

Details Packet-switched ring network having direct access to low and hig Packet-switched ring network having direct access to low and hig

1992-12-21

1995-04-11

Groody, James J.

Television

Two-way video and voice communication

User positioning

370 62, H04N 715

Patent

active

054063221

ABSTRACT:
A data communications network in which multiple host processors are linked in a network by respective network interface systems. The data communications network transmits packet data containing video information. The network interface system includes circuitry which enables it to direct video data values received from the network directly to a frame buffer or preprocessor to the frame buffer in the host processor. The circuitry determines the destination for each packet, frame buffer or main memory, based on an identifier contained in the packet header. Circuitry routes video data directly to a frame buffer memory area or preprocessor to the frame buffer memory area in the host. The network interface system also includes circuitry which enables it to receive video data directly from a camera memory area in a host processor for transmission on the network. Circuitry generates data packets directly from video data held in a camera memory area where the video data was generated by a camera in the host.

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C. Weiss, "Desk Top Video Conferencing--An Important Feature of Future Visual Communications", IEEE Conf. on Communications--ICC '90, 1990, pp. 134-139.

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