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中文摘要：
运动估计是H.264中最为复杂的部分,帧内预测是运动估计的重要内容。H.264中帧内预测模式众多,大大增加了编码的复杂度。在帧内预测中,一般是通过率失真优化或者相关特性来减少选择预测模式,但复杂度还是较高。针对此问题,提出了一种改进的基于边缘方向检测的帧内预测模式选择算法。该算法利用方向检测方法来检测模式选择方向上像素的相关性。测试结果显示,本算法在保证视频质量的前提下减小了计算复杂度,大大提高了编码速度。
英文摘要：
Motion estimation is the most complex part in H.264.Intra prediction is an important part of motion estimation.There are a number of intra prediction modes in H.264,which no doubt greatly increase encoding complexity.In intra prediction,the way of choosing prediction method is rate distortion optimization or using correlation properties.For complexity problem,the paper provides an improved intra prediction mode selection algorithm.This algorithm uses a new detection method to detect the pixel correlation in the direction of mode selection.Test results show that the algorithm has reduced the computational complexity and increased the encoding speed highly in the premise of ensuring video quality.
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