A study concerned with choosing motion vectors for low bit-rate coding of moving pictures

摘要

This paper proposed an original method concerned with choosing motion vectors for block matching to realize low bit-rate coding of moving pictures. We show the possibility of improving the conventional method for choosing motion vectors by analyzing the translational model of block matching. The proposed method chooses the motion vectors which contribute to lowering the hit rate. To evaluate its performance we calculate the mean of the hit rate and the quality of the pictures by hybrid coding of the plural frames of the moving pictures. The simulation results show it can reduce the total bit-rate to about two thirds of the bit rate of the conventional method in some cases. It is effective for moving pictures having little motion and a small value for the variance.