关键词: H.264, 帧内预测, 宏块分割, 边缘方向检测

Abstract:

A tool for intra prediction is introduced in the new video coding standard-H.264, and this technique can cut down the spatial redundancy effectively. Though intra prediction can improve the efficiency of the intra encoder, it is undoubtedly computationally intensive. To overcome this drawback, a novel fast intra prediction algorithm is proposed in this paper. By making use of the division of the macro-block, the edge direction is detected first and the direction of texture is estimated. Then the intra mode decision will be made among several most possible modes, which can diminish the number of the calculation. For variable video sequences, simulation results show that with the proposed algorithm the time of the intra coding can be reduced about 72.64％ while keeping a close quality and precision.

Key words: H.264, Intra prediction, division of macro-block, detection of edge directions