MPEG-4 is a method of defining compression of audio and visual (AV) digital data. It was introduced in late 1998 and designated a standard for a group of audio and video coding formats and related technology agreed upon by the ISO/IEC Moving Picture Experts Group (MPEG) (ISO/IEC JTC1/SC29/WG11) under the formal standard ISO/IEC 14496 – Coding of audio-visual objects. Uses of MPEG-4 include compression of AV data for web (streaming media) and CD distribution, voice (telephone, videophone) and broadcast television applications.

MPEG-4 absorbs many of the features of MPEG-1 and MPEG-2 and other related standards, adding new features such as (extended) VRML support for 3D rendering, object-oriented composite files (including audio, video and VRML objects), support for externally-specified Digital Rights Management and various types of interactivity. AAC (Advanced Audio Coding) was standardized as an adjunct to MPEG-2 (as Part 7) before MPEG-4 was issued.

MPEG-4 is still a developing standard and is divided into a number of parts. Companies promoting MPEG-4 compatibility do not always clearly state which "part" level compatibility they are referring to. The key parts to be aware of are MPEG-4 part 2 (including Advanced Simple Profile, used by codecs such as DivX, Xvid, Nero Digital and 3ivx and by Quicktime 6) and MPEG-4 part 10 (MPEG-4 AVC/H.264 or Advanced Video Coding, used by the x264 encoder, by Nero Digital AVC, by Quicktime 7, and by high-definition video media like Blu-ray Disc).

Marvin Gaye Williams, Jr. (born June 19, 1986 in Bremerton, Washington) is an American professional basketball player. He currently is playing for the Atlanta Hawks of the National Basketball Association and is listed at 6' 9" and 240 pounds. Williams played college basketball under coach Roy Williams at the University of North Carolina.

Marvin Williams was a standout for Bremerton High School in Bremerton, Washington. As a senior, he averaged 28.7 points, 15.5 rebounds, 5.0 blocks, and 5.0 assists per game^{[citation needed]}. Williams earned numerous awards, including being named a McDonald's All-American, a Parade All-American, and all-state.^{[citation needed]}

After being offered scholarships by the University of Washington, the University of Arizona, and the University of Kansas, Williams accepted a basketball scholarship at the University of North Carolina at Chapel Hill.

As a freshman, Williams was an integral part of the North Carolina 2004-2005 national championship basketball team. He averaged 11.3 points and 6.6 rebounds per game in 22.2 minutes.^{[citation needed]} As the team's sixth man, Williams provided the veteran Tar Heels squad with an explosive spark off the bench. He scored the go-ahead basket in North Carolina's 75-70 victory over the University of Illinois in the 2005 NCAA Men's Division I Basketball Championship game. Williams was recognized for his efforts when he was named as an Honorable Mention to the All-ACC team.