Abstract:

A novel adaptive fast inter mode decision algorithm based on motion vector-based moving window (MVMW) is proposed to solve the problem of inaccurate predicted rate-distortion cost (RDcost) and not suitable for all video types of the MVMW algorithm. Based on analysis of the spatial mode-correlation and temporal mode-correlation between macroblocks, the adjacent two previous macroblocks is used to predict the RDcost to solve the inaccuracy of prediction caused by ratio parameter matrix in MVMW. Meanwhile, the adaptive motion vector-based moving window is used to solve the problem of inaccurate predicted RDcost. The experimental results show that the proposed algorithm achieves significant time saving and image quality increment and bit rate reduce on average. The overall coding efficiency is better than MVMW.