Fast inter mode decision process for HEVC encoder

In this paper, we propose a fast inter mode decision method for High Efficiency Video Coding (HEVC) in order to reduce computational complexity of its encoder. It utilizes correlated tendency of PU mode. Compared to the early termination schemes for fast mode decision already implemented in HEVC reference software, it reduces the loss of coding efficiency. Experimental results show that the proposed method decreases encoding time by about 22.5% with little increment in bit-rate. Furthermore, the proposed method shows encoding time reduction of 39.1% with only 0.8% increase of bit-rate when it is combined with existing fast methods such as early CU termination scheme.