Method and apparatus for capturing and transmitting screen images

A method of processing video data for transmission to a remote system, the method comprising:

• obtaining multiple separate slices of video data output from a video graphics controller;
• calculating at least one value correlative to each of the multiple separate slices of video data;
• allocating multiple network buffers;
• if the calculated value for any portion of any of the multiple separate slices differs from a value for a previously obtained corresponding portion, updating a table associated with an image related to a remote system with the calculated value, processing the portion of the slices into a network packet, and moving the network packet to one of the multiple network buffers;
• and
• transmitting the network packet in the one of the multiple network buffers to the remote system.

A computer comprising:

• at least one central processing unit;
• main memory accessible by the at least one central processing unit;
• a video graphics controller configured to receive video data from the at least one central processing unit and to generate a video data output;
• a remote management controller coupled to receive the video data output from the video graphics controller, the remote management controller comprising a video redirection device and a processor,
• the video redirection device being configured to:
• obtain multiple separate slices of video data output from a video graphics controller,
• calculate at least one value correlative to each of the multiple separate slices of video data,
• if the calculated value for any portion of any of the multiple separate slices differs from a value for a previously obtained corresponding portion, update a table associated with an image related to a remote system with the calculated value, process the portion of the slice into a network packet, and move the network packet to one of multiple network buffers;
• and
• the processor being configured to:
• allocate the multiple buffers;
• facilitate transmission of the network packets loaded into the network buffers to the remote system.