一种面向对象速率控制方法  

A Object-oriented Rate Control Method

作　　者：王德红[1] 刘文予[1] 陈锐[1] 

机构地区：[1]华中科技大学电信系,武汉430074

出　　处：《计算机工程与应用》2002年第11期63-64,145,共3页Computer Engineering and Applications

摘　　要：该文提出了一种面向对象的速率控制算法,对重要对象区域根据宏块运动剧烈程度分配量化步长,在控制输出速率为常数的同时,该算法能让人类视觉更敏感的运动宏块分配到更多的比特。另外该算法比以率失真模型为基础的速率控制算法具有更低的计算复杂度。从模拟实验的结果可以看出该算法能有效提高指定区域的视觉质量。In this paper,an object-oriented rate contr ol method is proposed.As the scheme indicates,the quantization step sizes of t he important video object field are determinded by the motion activity of the m acroblocks.While keeping the output bitrate stable,the scheme distributes mo re bits to the motion macroblocks.On the other hand,it has a lower computation al requirement than the other rate control method based on rate distortion mode l.The simulation result shows that the scheme can improve the visual quality of the specified field.

关 键 词：实时编码 数字视频通信 图像编码 面向对象 速率控制 

分 类 号：TN919.8[电子电信—通信与信息系统]