Patent ID: 7403204

Claim:
A remote management controller comprising: a capture engine configured to: obtain a slice of video data output from a video graphics controller, calculate at least one value correlative to the slice of video data, determine whether any portion of the slice has been locked, and if any portion has not been locked and if the calculated value for such portion of the slice differs from a value for a previously obtained corresponding portion, move the portion to a virtual screen buffer, update a table associated with the virtual screen buffer with the calculated value, and modify a change table to indicate that the portion has changed; and a processor configured to: read the change table to determine whether any portion of video data in the virtual screen buffer has changed, and if any portion has changed, lock any changed portion from being accessed by the capture engine, access the changed portion from the virtual screen buffer, and process the changed portion in the virtual screen buffer for transmission to a remote system.