摘要
提出了一种帧内模式快速选择算法。利用宏块内部相邻像素值的差异判定宏块的类型,再进行Intra_4×4和Intra_16×16两种模式的快速选择。对于Intra_4×4模式,利用兰氏距离提取4×4块的纹理方向,根据纹理方向进行Intra_4×4模式的快速选择。实验结果表明,所提算法在峰值信噪比(PSNR)和码率变化不大的情况下,显著地提高了编码速度。
A fast intra prediction algorithm is proposed in this paper. The adjacent pixels in macroblock are used to determine the type of macroblock, and the best mode is selected from Intra_4×4 and Intra_16×16. For the Intra_4×4, Canberra distance is used to extract the direction of texture and to select the best mode of Intra_4×4. Experimental results show that the proposed algorithm can achieve remarkable computational reduction while maintaining similar PSNR and bit rate performance.
出处
《电视技术》
北大核心
2010年第2期19-21,共3页
Video Engineering
基金
教育部科学技术研究重点项目(208012)
