According to the distribution of the best inter coding modes

we give three early-terminated strategies for deciding whether one of the SKIP

P16×16

P16×8 or P8×16 can be selected as the best inter coding mode. If the conditions can be satisfied

the computation of RD cost of the rest mode can be saved. Experimental results show that the proposed algorithm can save about 50% to 70% time compared with a full-searching algorithm in H.264/AVC

meanwhile the decreasing of PSNR is about 0.17dB and the increas of bit-rate is about 2.42%.