H.264/AVC is the newest video compression coding standard. The intra prediction for H.264 uses RDO to choose the best prediction mode. This makes the coding performance greatly enhanced. But it also causes the coding complexity and the computation obviously to increase. This paper studies several fast intra prediction algorithms

and proposes a novel fast intra prediction algorithm which fuses the macroblocks smooth character and the 4×4 blocks texture property. The algorithm pre decides the size of block by macroblocks smooth character and decreases the predict modes by the texture character of 4×4 block. The result compared with JM95

shows that the algorithm makes the coding complexity reduced 71.3% while the PSNR is almost invariable.