Fast depth coding method for 3D-HEVC

The invention provides a rapid depth coding method for 3D-HEVC, and the method comprises the steps: firstly enabling a depth tree block to be divided into a simple CU, a medium CU and a complex CU through a built improved minimum visual depth difference model; secondly, executing early SKIP mode detection to determine an optimal inter-frame mode; then, executing a fast intra-frame mode to select an optimal intra-frame mode; and finally, executing an adaptive motion search range to select an optimal prediction mode. According to the method, the tree block characteristics of the depth map are analyzed by utilizing the improved minimum visual depth difference; the CU is divided into a simple CU, a medium CU and a complex CU, and then early SKIP mode detection, fast intra-frame mode selectionand adaptive motion search range prediction are carried out based on the three CUs, so that the coding complexity is reduced, the coding time of a depth image is shortened, and the loss of subjectivequality is ensured to be i