Referências
http://members.aol.com/judinorth/gifs.book/jpegs/jpeg.html
http://www.cs.und.edu/~mschroed/jpeg.html
http://www.cs.sfu.ca/CC/365/li/material/notes/Chap4/Chap4.2/Chap4.2.html
http://dynamo.ecn.purdue.edu/~ace/jpeg-tut/jpegtut1.html
http://www.eletr.ufpr.br/edu/pds98/Jpeg/
http://www.jpeg.org/