The joint collaborative team on video coding (JCT-VC) is developing the next-generation video coding standard which is called\nhigh efficiency video coding (HEVC). In theHEVC, there are three units in block structure: coding unit (CU), prediction unit (PU),\nand transform unit (TU). The CU is the basic unit of region splitting like macroblock (MB). Each CU performs recursive splitting\ninto four blocks with equal size, starting fromthe tree block. In this paper, we propose a fast CU depth decision algorithm forHEVC\ntechnology to reduce its computational complexity. In 2???? Ã?â?? 2????PU, the proposed method compares the rate-distortion (RD) cost\nand determines the depth using the compared information. Moreover, in order to speed up the encoding time, the efficient merge\nSKIP detection method is developed additionally based on the contextual mode information of neighboring CUs. Experimental\nresult shows that the proposed algorithm achieves the average time-saving factor of 44.84% in the random access (RA) at Main\nprofile configuration with the HEVC test model (HM) 10.0 reference software. Compared to HM 10.0 encoder, a small BD-bitrate\nloss of 0.17% is also observed without significant loss of image quality.
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