Patent ID: 6664969
Filing Date: 2003-12-16
Classification: G06F,H04L

Abstract:
A method for transmitting video graphics data over a communications link to a remote location from a data processor including a display memory, comprising:dividing a display memory into a number of blocks, the blocks storing multibit pixel values representing video data to be displayed; periodically reading the multibit pixel values stored in a plurality of the blocks; for each block that has been read condensing the multibit pixel values to lower number bit values; computing a current signature value for each block that has been read based on the contents; comparing the current signature value for each block that has been read to a previously computed signature value corresponding to that block; and transmitting to the communication link the lower number bit value contents of each block that has been read if the current signature value for that block is different from the previously computed signature value corresponding to that block.