Statistical Analysis and Derivation of Intra MB Mode Decision Rules for MPEG-2 to H.264/AVC Transcoding
Xingang Liu, Kook-Yeol Yoo · 2008
In this paper, the DCT coefficients from the MPEG-2 decoder are used for the intra mode decision of H.264/AVC encoder. Based on the spatial activity analysis with the coefficients, early mode decision method between Intra16times16 and Intra4times4 modes and the Intra prediction direction are proposed. The empirical results show that the proposed method reduces about 70% computational complexity reduction compared with conventional method at the slight reduction in PSNR.