Comment list of prior art (Score 1) 1223
A list of prior art is given in the history paper linked at this website:
http://www.geocities.com/mpegminus/
In any event, JPEG could be tweaked to circumvent this infamous patent by losslessly transcoding the 2D-run-length symbols to something else.
In fact, every JPEG picture in the world could be filtered without altering a single pixel, and would completely avoid this patent.