一种基于整数DCT系数调制及N维魔方矩阵的H.264/AVC信息隐藏方法

A H.264 /AVC Information Hiding Algorithm Based on Integer DCT Coefficients Modulation and N-dimensional Magic Matrix

针对H.264/AVC视频编码标准提出了一种基于整数DCT系数调制及N维魔方矩阵的信息隐藏方法,该方法通过构造N维魔方矩阵,最多仅需修改N个整数DCT系数中的一个即可实现一位2N+1进制数的嵌入.实验表明,当N取3时,本文提出的方法在嵌入效率方面比现有方法提高了180%,同时在视频质量和码率方面本文方法有较大优势;并且,随着N的增大上述优势也趋于增强.

This paper proposed a information hiding method which was based on integer DCT coefficient matrix modulation and N-di- mensional cube according to H. 264/AVC video coding standard, the method constructed a N-dimensional cube matrix, then the em- bedded integer DCTs were corresponded to the N-dimensional cube to establish a mapping matrix, through changing the N coefficients of a factor to make the adjacent map values to be equaled with 2N ＋ 1 decimal equivalent private information to achieve private infor- mation embedding. Experimental results showed that, when N fetched 3, the proposed method is more efficient than previous method improves by 180%, the PSNR and coding rate is better than the previous method, and with the increase of the N, this advantage was more obviously.