Method and apparatus for encoding/decoding with interlace scanning based motion vector transformation

摘要

An interlace scanning image encoding or decoding method. The interlace scanning image encoding method includes estimating motion of a present field corresponding to a portion of a present image based on a main reference field and calculating a motion vector of the main reference field, selecting a subsidiary reference field related to the main reference field, deriving a motion vector of the subsidiary reference field from the motion vector of the main reference field, generating a prediction field of the present field using any one of the motion vector of the main reference field and the motion vector of the subsidiary reference field, and encoding a residual field between the present field and the prediction field.