为了实现数据量较大的流媒体彩色视频信息的隐秘传输，描述了一种将low level MPEG—Ⅱ彩色视频信号隐藏在另一路main level MPEG—Ⅱ彩色视频中，并通过公共信道进行传输的方法。该方法利用人眼视觉特性，在宿主视频图像的DCT域，选择对人眼不敏感的中高频信息作为宿主可修改矢量，并提出了一个新的数据嵌入方法，由于该方法最多修改L bits宿主信息，就可在(2L 1)bits宿主可修改矢量中嵌入2L bits信息，因此有较高的数据嵌入率及较好隐蔽性。该方法也可用于其他流媒体及较大信息量信息的隐秘传输。该方法已在局域网上进行了模拟，并获得了较好的结果。

In order to realize secret transmission of great color video information. This paper presents a new scheme capable ofhiding low levelMPEG2Ⅱcolor video streams intomain levelMPEG2Ⅱcolor video streams. Itmakes fulluse of vision character of our eyes and selects information of intermediate/high frequency as revisable host vector in the DCT domain ofhostvideo streams, which are notsensitive to our eyes. A novel embeddingmethod is proposed in this paper. As many as Lbits of information data can be embedded by changing, atmost,Lbits in the(2L+1)bits cover data, which makes higher dataembedding efficiency and better secrecy. The scheme can be also used for secret transmission of other stream media and great information. The scheme has been simulated in Local areaNetworks and better experimental results have been given.