A two-component video signal showing the magnitude and direction of moving object displacement over given time interval, e. g. during one TV field. Usually represented in Cartesian co-ordinates, but could equally well be represented in polar notation.
a bi-dimensional pointer that tell the decoder how much left/right and up/down, from the position of the macroblock, is located the prediction macroblock in the reference frame or field
a pointer from a P-block in the current frame to an I- or P-block in the previous frame
A two-dimensional spatial displacement vector used for MPEG motion compensation to provide an offset from the encoded position (I-picture or P-picture) of a block in a reference picture to the predicted position (in a picture or B-picture).
A two-dimensional spatial displacement vector used for MPEG motion compensation to provide an offset from the encoded position of a block in a reference (I or P) picture to the predicted position (in a P or B picture).
A two-dimensional vector used for motion compensation that provides an offset from the coordinate position in the current picture to the coordinates in a reference picture.