【摘要】 根据人眼对图像内容边缘比较敏感的特点,针对宏块内水平方向或垂直方向边缘点的个数及边缘的总数选择宏块分割模式。对于边缘点的选择根据仿生学中人眼视觉对比敏感度,提出了新的边缘处像素点的亮度自适应选取阈值的模型,并根据此算法提出了SAD和Rdcost门限准则。将算法应用到AVS的编码过程,实验效果表明,在保证视觉效果的同时,提高了帧间预测的速度及整个视频编码的速度,整个编码速度提高了53%。更多还原

【Abstract】 According to the characteristics of eyes which are sensitive to edge , this paper choices the macroblock mode by the num-bers of edge pixel in the horizontal or vertical direction and the numbers of edge pixels in the macroblock. The edge pixel is decidedby intensity of eyes and this paper brings forward a model of decision of the threshold of edge pixels by luma and threshold rule ofSAD and Rdcost according to this algorithm. Using this algorithm to AVS encoder, the results shows this algorithm improves thespeed of the ecoder and gets nice vision effect. The speed improves 53%.更多还原