Abstract: The current video watermarking lacks effective methods for fast resynchronization and byte alignment.A new idea is put forward，which is watermarking for video with fast resynchronization and random algorithm in this paper.Firstly，the watermarking data are channel coded and dynamically packaged as a ‘watermarking package’.And then，according to the relative stability of DCT domain low-frequency AC and DC coefficients to generate control code，and use the control code to achieve the watermark embedding with random.Through the ‘flags code’ of the ‘watermarking package’ to achieve the meaningful watermark.The experiment show that not only can the algorithm detect meaningful watermarking at random，but it has performed well in anti-attacks.

摘要： 目前的视频数字水印缺乏有效的快速重同步和文本字节对齐方法，对此文章设计了一种快速重同步的视频水印随机检测算法。该算法先将需嵌入的水印数据经过信道编码并动态的封装成“水印包”；然后利用DCT块中的DC和低频AC系数的相对稳定的特性生成控制码；且通过该控制码将“水印包”按位且随机地嵌入到视频的DCT域中。在水印提取时，通过“水印包”中的标志码来提取有意义的水印信息。实验表明：该算法不仅能快速检测到有意义的文本数据，而且对外界攻击具有较强的稳健性。