Fast global motion-compensated frame interpolator for very low-bit-rate video quality enhancement

In this paper, we proposed a fast frame interpolator at decoder end to enhance the temporal quality of the real-time low-bit-rate video applications, such as the cellualr video conferencing. The proposed frame interpolator operates in the fashion of block-base instead of pixel-base to achieve the real-time speed. The global motion model is adopted in our scheme to interpolate the camera motion. Our scheme fully utilizes the received block-based motion vectors from the encoder to minimize the complexity of the global motion search. Furthermore, the majority of the local motion vectors for moving object interpolation can be directly derived without performing complex local motion search at the decoder end. The experiment shows that the proposed algorithm can interpolate frames in real-time and successfully remove the jigger artifacts caused by the low frame rate.