摘要
在压缩的视频码流中嵌入数字水印时,如果选择在I帧图像的DCT系数中嵌入数字水印,那么后面的P帧和B帧图像的质量会受到很大的影响。提出了利用新的漂移补偿方法来减小I帧图像中的数字水印对后面的P帧图像和B帧图像的影响。实验结果证明该方法明显地提高了P帧和B帧图像质量,同时所需计算量较小。
The quality of the picture of the P frame and B frame is affected,if watermark is embedded in I frame in the compressed video MPEG-2 bit-stream.In this paper,the method of the novel drift compensation is proposed to decrease this influence.h is turned out that this method evidently improves the quality of the picture of the P frame and B frame,at the same time ,the needed computation power of this method is small.
出处
《计算机工程与应用》
CSCD
北大核心
2007年第16期80-82,共3页
Computer Engineering and Applications
基金
国家重点基础研究发展规划(973) (the National Grand Fundamental Research 973 Program of China under Grant No.2003CB314706)
关键词
视频数字水印
DCT系数
漂移补偿
图像质量
计算量
video watermarking
DCT coefficient
drift compensation
quality of the picture
computation power
