Motion vector coding method and apparatus therefor

摘要

The current motion vector is coded based on the reference motion vector. First, the first and second predictors for the current motion vector are determined. The first predictor decides the median among the first and second components of the reference motion vector, The second predictor selects the first and second components of the reference motion vector having a minimum difference with respect to the current motion vector as the first and second components; If the degree of variance of the reference motion vector is less than the threshold value, the first predictor is set as the best predictor; otherwise, the second predictor is set as the optimal predictor of the current motion vector; The current motion vector is coded based on the optimal predictor using the difference pulse code modulation and the variable field method so that if the reference motion vectors are larger than a predetermined threshold value, It is possible to more accurately encode a motion vector by setting the reference motion vector having the smallest difference as an optimal predictor.