关键词: H.264/AVC, 视频编码, 模式选择, 帧间预测

Abstract: One of the features adopted in the newest video coding standard H.264 /AVC was the utilization of variable block-size motion estimation. The aims was to reduce the inter prediction error compared to coding a macroblock (MB) using fixed block size. However, this feature results in extremely high computational complexity. In this paper ,a fast mode decision algorithm is proposed. It makes use of the information of temporal and spacial correlation in the encoded adjacent macroblocks to predict the homogeneous or stationary regions and judge beforehand the possible modes. Thereby the whole procedure of mode decision is simplified. The experimental results show that , the proposed algorithm can reduce encoder complexity significantly while coding quality is only negligible decreased.

Key words: H.264/AVC, video coding, mode decision, inter prediction