Telewriting terminal system performing adding/deleting operation

Details Telewriting terminal system performing adding/deleting operation Telewriting terminal system performing adding/deleting operation

1996-01-23

1998-04-28

Rogers, Scott

Computer graphics processing and selective visual display system

Display driving control circuitry

Controlling the condition of display elements

395330, 345 2, 358436, 358468, 178 18, G06F 1516, G06F 15173, H04N 132

Patent

active

057456887

ABSTRACT:
A telewriting system has a plurality of telewriting terminals connected with a communication line, each of the telewriting terminals having a display unit so as to display an image thereon. The image displayed on the display unit is changed in accordance with instruction information transmitted via the communication line. A server unit is connected to each of the telewriting terminals by the communication line. The server unit communicates with the telewriting terminals, and has an image memory to store image information corresponding to the image displayed on the display unit. The image information to be stored in the image memory is changed, when the instruction information requesting a change of the image is received from the telewriting terminals, in accordance with the received instruction information. Differential information between the image information before the change and the image information after the change is extracted. The differential information is distributed to each of the telewriting terminals.

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