摘要
为提供实时视频传输服务,同时保证一定的视频质量,提出了一种基于JVT-G012的动态码率控制算法。在编码过程中,根据图像内容的运动特性,动态决定GOP长度,同时防止输出缓冲器的上溢和下溢;为复杂度较高的宏块(MB)分配较多的比特。实验结果表明,该算法对于场景变化较大的实际视频序列有较好的编码效果。
To reduce the complexity of bit allocation scheme for real-time video coding and keep an acceptable video quality, an effective rate control scheme is proposed.The length of each GOP is dynamically determined according to the complexity of the video clip.The algorithm employs a simplified content-based model to allocate bit budget between frames within GOP.Those maeroblocks containing more motional information get more bits than other ones in the same frame.Experimental results show the proposed methods can enhance the overall quality of compressed video.
出处
《计算机工程与应用》
CSCD
北大核心
2008年第1期117-118,141,共3页
Computer Engineering and Applications
关键词
码率控制
动态图像组
视频编码
Rate Control（RC）
dynamic GOP length
video encoding
