Take the video signal as the carrier, the sender choice embedding the hiding information in the DCT coefficient, according to neighboring many DCT block DC coefficient size relations,, embedding control code, Control information correct extraction.

• 以视频信号为载体,发送方选择在DCT系数中随时嵌入隐藏信息,根据相邻多个DCT块的DC系数的大小关系,嵌入控制码,控制信息正确提取。