融合方向编码和湿纸编码的高效信息隐藏

Efficient Data Embedding by Combining Modification Direction Modulation and Wet Paper Code

基于融合方向编码和湿纸编码,提出一种新的高效数据隐藏方法.嵌入载体数据的秘密信息分为两部分:第一部分由载体数据加权和负载,第二部分则通过选择载体数据的调整方向来嵌入.湿纸编码用于确定载体数据的调整方向,并将不同的载体数据对应于不同的秘密信息.该方法适用于多种载体类型,在不同嵌入率条件下具有较高的嵌入效率,优于单纯使用方向编码的EMD(exploiting modification direction)方法.

A novel efficient data-hiding approach is proposed by combining the modification direction modulation and wet paper code. After dividing a secret message into two parts, the first part is carried by the weighted sum of cover data, while the second is embedded by employing wet paper code to select the direction of modification on the cover data and to construct a relation between the cover and the secret data. In this way, a data-hider can increase the embedding payload under a distortion restriction or lower the level of distortion caused by data embedding with a given payload. It is shown that performance of the proposed approach is better than that of the exploiting modification direction （EMD） embedding method. It is suitable for cover signals in various formats.