Fast HEVC Inter CU Decision Based on Latent SAD Estimation


The rising high potency video coding (HEVC) customary has improved compression performance considerably compared with H.264/AVC. But, more intensive computational complexity has been introduced by adopting a range of latest coding tools. In this paper, a quick inter CU decision is proposed based mostly on the latent add of absolute differences (SAD) estimation. Firstly, a two-layer motion estimation (ME) method is designed to take advantage of the latent SAD price. The new ME method will obtain the SAD prices for both the upper CU and its sub-CUs. Secondly, an idea of motion compensation rate- distortion (R-D) price is defined, and an exponential model is proposed to specific the connection between the motion compensation R-D value and therefore the SAD price. Then, a quick CU decision approach is intended based on the exponential model. The fast CU decision is implemented by comparing a derived threshold with the SAD cost distinction between the upper and sub SAD costs. Experimental results show that the proposed algorithm achieves a median of 52percent and 58.4percent reductions of the coding time at the value of 1.61percent and a pair ofp.c bit-rate will increase below the low delay and random access conditions, respectively.

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