Fast multiple reference frame selection algorithm for H.264 based on spatial correlation
Cao Lei · Journal of Communications · 2010
A fast multiple reference frame selection algorithm was proposed for a H.264 encoder to compute the optimal reference frame number.According to the spatial correlation in natural videos,the current macro block’s Skip mode was determined before performing the motion estimation in terms of the information from its adjacent macro block coding mode.A fast inter frame selection model algorithm was presented to improve the efficiency of motion estimation.Based on the probability characteristics of the Skip mode in the sequence,the optimal reference frame number was obtained for fast motion estimation.Experiments show that the proposed algorithm can reduce the average encoding time up to 72.5% with the average PSNR degradation no more than 0.07dB.