摘要
本文对数字视频广播中的水印技术进行了研究 ,提出了一种MPEG2码流域的视频水印算法 ,考虑人眼视觉特性 ,通过对特定位置DCT系数进行修改 ,以实现水印的嵌入 .并且根据视频帧的不同特性 ,实现了检测阈值的动态选取 .本文的方法 ,计算复杂度低 ,易于实现 ,并具有较高的鲁棒性 ,能够应用于拷贝控制 。
In order to deal with the copyright issues in DVB environment, a MPEG domain watermarking algorithm is proposed here. The watermark is embedded by modulation of corresponding DCT coefficients according to human visual system. The threshold of the detection correlator is dynamically adjusted along the time-axis to fit the frame characteristics. The proposed method is of low complexity and easy to be implemented in terminal consumer electronics devices. It has enough robustness in the copy control and user tracing scenarios.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2003年第10期1562-1564,1561,共4页
Acta Electronica Sinica
关键词
数字视频广播
数字水印
版权保护
Broadcasting
Copyrights
Feature extraction
Security of data
Video signal processing
