Fast Mode Decision Algorithm for H.264/SVC Based on Motion Vector Relation Analysis

Recently, scalable video coding technique has attracted a lot of attention for its desired scalable functionality and coding efficiency. H.264/SVC encodes a video in a hierarchical way by which the coded bit stream can satisfy terminals with different capability of display and different condition of network at the same time. However, the huge computational complexity of mode decision causes difficulties in real-time coding. This paper proposed a fast mode decision algorithm for H.264/SVC by analyzing the relation of motion vectors of 8×8 blocks. The new algorithm leads an early termination and a prediction of Inter16×8 and Inter8×16. Experimental results show that the proposed algorithm can achieve a reduction of computational complexity by 63.28% on average, with the negligible 0.58% increase of Bit rate and 0.05 dB loss of PSNR.