Fast intra mode decision algorithm based on inter prediction mode for H264/AVC

This paper proposes a fast intra mode decision approach based on the best inter prediction mode for P frames. This investigation is motivated by the high correlation observed between selected inter prediction mode and intra mode decision. The aim of this work is reducing computational complexity of the intra prediction module for H.264/AVC baseline encoder without inducing visual quality degradation or bit-rate increase. The evaluation of the proposed scheme was based on the rate distortion criteria and the execution time. Experimental results show that the proposed algorithm can save up to 60% of intra prediction computation time and maintain similar PSNR quality without inducing a bit-rate increase.