Telewriting terminal system performing adding/deleting operation of an image based on control information
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 28, 1998
Grant Date -
N/A
app pub date -
Jan 23, 1996
filing date -
Feb 28, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
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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