Motion vector

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:

motion vector: A two-dimensional vector used for inter prediction that provides an offset from the coordinates in the decoded picture to the coordinates in a reference picture.[1][2]

Sintel Motion Vectors
Visualized motion vectors. The foreground character's rotating downward head movement is visible, as well as the background character's slower upward head movement.

See also


  1. ^ Latest working draft of H.264/MPEG-4 AVC Archived 2004-07-23 at the Wayback Machine.. Retrieved on 2008-02-29.
  2. ^ Latest working draft of H.264/MPEG-4 AVC on

This page is based on a Wikipedia article written by authors (here).
Text is available under the CC BY-SA 3.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.