A format converter which performs frame rate conversion and de-interlacing using
a bi-directional motion vector and a method thereof are provided. The method includes
the steps of (a) estimating a bi-directional motion vector between the current
frame and the previous frame from a frame to be interpolated; setting the motion
vector of a neighboring block that has the minimum error distortion, among motion
vectors estimated in step (a), as the motion vector of the current block; and (c)
forming a frame to be interpolated with the motion vector set in step (b).
