This video is the first of two lectures in this unit. The second lecture of this unit is missing due to technical reasons.
Instructors: Prof. Paul Penfield, Prof. Seth Lloyd
Resources
Technical
Flag of Germany, the perfect example for run-length encoding
Blackstock, Steve. LZW and GIF explained. From Amer, Paul. CISC 451/651: Data Compression in Multimedia
Nelson, Mark. "LZW Data Compression." Dr. Dobb's Journal 14 (October 1989): 29-36.
PNG, an alternative to GIF
Historical
Wilson, Geoffrey. The Old Telegraphs. London, UK: Phillimore and Co., 1976. ISBN: 9780900592799.
Describes several telegraph systems, in many countries, that predate electrical telegraphs.
Holzmann, Gerard J., and Björn Pehrson. The Early History of Data Networks. Hoboken, NJ: John Wiley and Sons, 1994. ISBN: 9780818667824.
———. "The First Data Networks." Scientific American 270 (January 1994): 124-129. (PDF)#
Describes French and Swedish optical telegraphs, from the 1790s.
Standage, Tom. The Victorian Internet. New York, NY: Berkley Books, 1999, chapter 1. ISBN: 9780425171691.
Unisys/Compuserve GIF Controversy:
- Statement from League for Programming Freedom
- More general Software Patents Statement by LPF
- Unisys statements (archived): License Information and Web Site LZW Licenses
- Battilana, Michael C. The GIF Controversy: A Software Developer's Perspective. January 27, 1995.