In video compression, a motion vector is the key element in the motion estimation process. It is used to represent a macroblock in a picture based on the position of this macroblock (or a similar one) in another picture, called the reference picture.
The H.264/MPEG-4 AVC standard defines motion vector as:
- Latest working draft of H.264/MPEG-4 AVC Archived 2004-07-23 at the Wayback Machine.. Retrieved on 2008-02-29.
- Latest working draft of H.264/MPEG-4 AVC on hhi.fraunhofer.de.[permanent dead link]