MPEG Fundamentals - Guide to MPEG-2 video and audio compression from Tektronix. - http://www.tek.com/Measurement/programs/mpeg_fundamentals/
MPEG-2 Overview - Covers MPEG-2 and DVB standards, transmission and equipment. Easy reading. - http://erg.abdn.ac.uk/research/future-net/digital-video/mpeg2.html
MPEG-2 - Extensive description of the MPEG-2 standard, including figures and links to more detailed documents. - http://www.chiariglione.org/mpeg/standards/mpeg-2/mpeg-2.htm
Testing Digital Video - IEC Online Education presents an HP tutorial on testing MPEG-2 video. - http://www.iec.org/online/tutorials/test_dv/
MPEG-2 FAQ - Answers questions about the MPEG-2 digital broadcast standard. - http://bmrc.berkeley.edu/frame/research/mpeg/mpeg2faq.html