1. ISO/IEC JTCl/SC29/WG11, ISO/IEC CD 11 172: Information Technology, MPEG-1 Committee Draft, Dec. 1991.
2. ISO/IEC JTCl/SC29/WG11, ISO/IEC CD 13818: Information Technology, MPEG-2 Committee Draft, Dec. 1993.
3. International Telecommunication Union, Video Codec for Audiovisual Services at p×64kbits, ITU-T Recommendation H.261, Mar. 1993.
4. International Telecommunication Union, Video Coding for Low Bitrate Communication, ITU-T Draft H.263, July 1995.
5. International Telecommunication Union, Advanced Video Coding for Generic Audiovisual Services, ITU-T Recommendation H.264, Nov. 2007.