Electrical computers and digital processing systems: multicomput – Computer conferencing
Patent
1996-06-27
1999-06-22
Ellis, Richard L.
Electrical computers and digital processing systems: multicomput
Computer conferencing
345330, H04L 1218
Patent
active
059139200
ABSTRACT:
Two computer workstations are connected together by a communications link 300. One workstation (the local workstation) 100 includes a window 610 which is used to display a copy of what is currently being displayed on the screen of the other (remote) workstation 200. Each time an update is made to the screen of the remote workstation, it must be transmitted to the local workstation. A bounding rectangle 920 for the area of the screen changed by the update is determined. If the bounding rectangle is greater than a predetermined size, then a first packet is transmitted from the remote workstation to the local workstation, prior to the transmission of the actual update itself. This first packet indicates the bounding rectangle for the updated area of screen. The local workstation responds to the first packet by greying (shading) the corresponding region 925 of the window which contains the copy of the remote screen, thereby indicating to a user of the local screen that an update is imminent.
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Adams Paul Stuart
Gladwyn Benedict Daniel
Singleton Vincent Joseph
Ellis Richard L.
International Business Machines - Corporation
Ray-Yarletts Jeanine S.
Winder Patrice L.
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