基于视频压缩标准的自适应信息隐藏算法  

Adaptive information hiding algorithm based on video coding standard

作　　者：陈青[1] 牛月蕊[1] 连攀攀[1] 邢晓溪[1] 胡琪雯[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《计算机应用研究》2012年第12期4659-4661,共3页Application Research of Computers

基　　金：教育部留学人员启动基金资助项目(3309306001);上海自然科学基金资助项目(12ZR1420800)

摘　　要：为了使信息隐藏算法在经受有损压缩后仍能可靠地提取嵌入的信息,提出一种信息隐藏和MPEG-2压缩编解码器一体化的方法。根据压缩程度和宿主内容,结合HVS约束、隐藏容量的需求及有损压缩失真影响等因素,利用MPEG-2压缩的控制参数调整信息隐藏的强度和数据量,从而自适应实现视觉质量、内嵌容量和鲁棒性等参数的折中。实验结果表明,该算法除了能抵抗较强的有损压缩外,对常见攻击,如低通滤波、噪声干扰、帧丢失以及转码等也具有鲁棒性,是一种在MPEG-2有损压缩框架下,用灵活的折中机制来隐藏和准确提取信息的有效的鲁棒信息隐藏算法。In order to get reliable retrieval of embedded message under lossy compression,this paper developed an algorithm that integrated data hiding into the MPEG-2 codec.It associated the adjustment factor of the strength and quantity of data hiding with the control parameter of lossy compression,combined with the constraint of human visual system,the demand of hiding capacity and distortion impact of lossy compression,to achieve a trade-off of visual quality,capacity,robustness and other parameters adaptively.Experimental results show that the proposed algorithm not only resistes strong lossy compression,but also possesses robustness to common attacks,including noisy interference,low-pass filtering,transcoding and frame dropping.Thus it is an effective robustness hiding algorithm with flexible compromise mechanism to hide and accurately retrieve hidden data in a MPEG-2 lossy compression framework.

关 键 词：信息隐藏 离散余弦变换 人类视觉系统 数据压缩 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]