中文说明：应用背景通过载体对信息进行隐藏，保证在不影响载体视觉效果的前提下实现信息隐藏；关键技术通过离散余弦变换（DCT）将需要隐藏的信息嵌入到载体中从而达到信息隐藏的目的。
English Description：
Application backgroundThrough the carrier to hide the information, guarantee the carrier visual effect without the premise of the realization of information hiding;Key TechnologyThe discrete cosine transform (DCT) will need to embed the information into the carrier to achieve the purpose of information hiding..