摘要
本文在对标准MPEG 2视频编解码系统深入剖析的基础上 ,对视频码流内嵌数字水印典型系统H&G算法核心技术进行分析和改进 ,引入动态水印嵌入控制和DCT域水印自适应调制控制对其进行优化。模拟实验表明 ,改进算法较原有算法能够更合理有效地将水印信息嵌入到视频码流中 。
Based on characteristics of MPEG 2 video coding system,the H&G algorithm is discussed in this paper,which is a typical digital video watermarking algorithm in the compressed stream To optimize this system,the dynamic strategy is introduced to control the quantity of embedding information and modulation amplitude of embedding information in DCT domain Simulation results show that the proposed scheme can more rationally and effectively embed watermark information than the original algorithm,while the complexity of watermarking system markedly reduced
出处
《通信学报》
EI
CSCD
北大核心
2000年第11期1-6,共6页
Journal on Communications
基金
国家自然科学基金资助!项目 ( 6 9972 0 32 )
天津市自然科学基金资助!项目 ( 9936 0 0 311)
