Fast Mode Decision Algorithm for Intraprediction in H.264/AVC with Integer Transform

A tool of intra prediction is introduced in the new video coding standard-H.264, which can cut down the spatial redundancy effectively. Though intra prediction can reduce the bit rate, it is undoubtedly computationally intensive. To overcome this drawback, a novel fast intra prediction algorithm is proposed in this paper. By make use of the information in the transform domain, the direction of texture is estimated at first and then the intra mode decision will be made among several most possible mode, which can diminish the number of calculation. To variable video sequences, the simulation results show that with the proposed algorithm the time of the intra coding can be reduce about 70% while keep the equivalent precision. It is conclusion that the proposed algorithm is suitable to the real-time implements with rigorous requirement on delay.