In order to achieve real-time encoding with high definition and upper high definition,and according to the texture information of image and the distributed characteristics of zero block in the co ding unit,a novel fast inter-mode decision algorithm of high efficiency video coding (HEVC) is proposed.In the inter predi ction,the texture similarity of current coding unit (CU) under the SKIP mode is used to determine whether the CU will be terminated to the partition of quadt ree.And the best prediction unit (PU) mode is chosen utilizing the distributive region characteristics of zero coefficients and non-zero coefficie nts to judge the effect of motion characteristics and motion estimation after residual coefficients under the inter 2N×2N mode.The experimental results indicate that the average time of HE VC inter coding is reduced by 60.2% and 59.4% separately in random access and lo w-delay configurations,with the same coding performance.