摘要
H.264/AVC引入的可变块尺寸运动估计技术,使得帧间模式判决异常复杂。针对这个问题,提出了一个新概念-相邻宏块模式同构,并给出一种基于修正运动矢量的模式快速判决算法,通过找到当前编码块8×8模式方向和幅值趋近一致的运动矢量,进而修正运动矢量,以使较小块尺寸模式可扩展为较大块尺寸模式。实验结果表明,该算法在重构图像质量没有明显降低的前提下,大幅度提高了编码速度。
Mode decision becomes very complexity when H.264/AVC introduces varible block size about motion estimation.To address the issue, in this paper a novel concept about same mode structure of neighboring macroblock is proposed. Furthermore, a fast mode decision algorithm by gaining the direction and value about motion vector of current macroblock is also proposed, and the mode focuses on 8x8 at the beginning for expanding the block size with correcting motion vector. Simulation shows that the proposed algorithm can efficiently improve the coding speed with similar visual quality.
出处
《微型机与应用》
2010年第10期45-48,共4页
Microcomputer & Its Applications
