Patent ID: 6381277
Filing Date: 2002-04-30
Classification: G06T,H04N

Abstract:
A shape information coding method for interlaced scanning video, said method comprising the steps of:(a) estimating motion of a predetermined size of binary alpha block inputted, determining a shape information motion prediction mode and a motion vector predictor for shape, based upon the estimated motion information, and performing an operation for the determined motion vector predictor for shape and the estimated motion information to calculate a motion vector difference for shape; (b) determining a type of the binary alpha block in accordance with the motion information in the motion estimating step (a); (c) comparing a first value obtained by accumulating an error between each pixel of a frame and the pixel adjacent thereto upon the frame of the binary alpha block with a second value obtained by accumulating an error between each pixel of a field and the pixel adjacent thereto upon the field of the binary alpha block to thereby determine a coding mode in accordance with the compared result; (d) compensating the motion of the shape information in accordance with the determined shape information motion prediction mode; and (e) coding the motion-compensated shape information in the determined coding mode.