| 摘要 |
PURPOSE: A video coding and decoding method is provided to decrease the number of bit needed in a video compression coding by estimating motions of blocks included by a main region(or a background region) after dividing a full screen of animation into the main region and the background region. CONSTITUTION: In a coding process, an estimation vector(MV(Bk)) of a block to be coded is found out in an input image(Frame)(301). The input image(Frame) is divided into a main region(Fm) and a background region(Fb), and an overall motion vector(MV(Fm))(or MV(Fb)) of the main region(Fm)(or the background region(Fb)) is found out(302). Next, by coding the difference value(delta(Bk)) of the overall motion vector(MV(Fm) or MV(Fb)) and a motion vector(MV(Bk)) of a pertinent block(Bk), the difference value(delta(Bk)) of the overall motion vector(MV(Fm) or MV(Fb)) is coded instead of the motion vector(MV(Bk)) of a pertinent block(Bk)(303). |
