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.

Famous quotes containing the word motion:

    “Two children, all alone and no one by,
    Holding their tattered frocks, thro’an airy maze
    Of motion lightly threaded with nimble feet
    Dance sedately; face to face they gaze,
    Their eyes shining, grave with a perfect pleasure.”
    —Laurence Binyon (1869–1943)