초록 ▼

A system wherein multiple computers engage in a video conference. The invention creates a common visual image which is displayed by all computers. However, the invention does not distribute a bit map of the image to all computers. Instead, the invention distributes the commands from which the image

A system wherein multiple computers engage in a video conference. The invention creates a common visual image which is displayed by all computers. However, the invention does not distribute a bit map of the image to all computers. Instead, the invention distributes the commands from which the image is created. Further, the distributed commands rely on data structures, which define parameters such as pen color, background color, line width, etc. The data structures are stored in each computer. When a data structure is changed, the invention does not immediately inform all other computers of the change, but waits until necessary.

대표청구항 ▼

In a system wherein a GUI runs on a host computer and generates graphic images by issuing GDI calls which make reference to device contexts, the improvement comprising: a) maintaining similar device contexts in remote computers and b) maintaining substantially identical first program means on each c

In a system wherein a GUI runs on a host computer and generates graphic images by issuing GDI calls which make reference to device contexts, the improvement comprising: a) maintaining similar device contexts in remote computers and b) maintaining substantially identical first program means on each computer, which i) allows a single application program to selectively run on any of the computers, and no other computer, which generates a display on the selected computers, ii) replicates the display on all other computers, iii) allows a user of each computer to make annotations, containing graphical images, on the replicated display of each respective computer, iv) allows each respective user to selectively A) cause the first program means to copy the annotations made by the user to replicated displays of other computers, or B) cause the first program means to refrain from copying the annotations made by the user.