Low Complexity Mode Selection for H.264 Based on Motion Region Partitions

An efficient mode selection algorithm is proposed in the paper to reduce the complexity of H.264 encoder.By the algorithm, firstly the boundary and the interior of the motion object are identified with the motion vector information.Then the boundary regions are classified into different types of regions based on the coded mode information of the macroblocks (MBs) surrounding the current MB.And at last, the various motion regions with appropriate modes will be processed according to their characteristics.Experimental results demonstrate that the proposed algorithm can save the encoding time up to 47.95% on average, to meet the requirement of real time applications, with a sacrifice of 0.06?dB degradation on PSNR generated but with no effect to the visual quality produced.