自适应量化索引调制及其信道编码的信息隐藏技术的研究

在信息隐藏通信时,对JPEG-2000小波多级分解并在嵌入块编码中根据不同级的LL-HH分组系数引入自适应量化索引调制(AQIM),同时结合信道编码技术可以有效地实现指纹节点数据的信息隐藏和安全传输技术.通过实验可知,低码率时,与QIM隐藏技术相比,本系统有效地提高了恢复指纹图像的PSNR,同时降低了系统的BER,表明该系统恢复的图像具有更好的感官质量和更强的鲁棒性.

Study of an information hiding method of joint adaptive quantization index modulation and channel-coding

In information hiding communication,combining the adaptive quantization index modulation (AQIM) with channel coding,the paper can realize hiding fingerprint minutiae data in the JPEG-2000 video stream and transmitting safely in an effective way according to the DWT coefficients groups of different LL-HH level during the embedded block coding of JPEG-2000 video compressed process. The experimental results show that,comparing with traditional information hiding technology based on quantization index modulation,the proposed method can achieve higher PSNR of the recovered fingerprint image and lower bit error rate in the case of low bit rate. The proposed method has better visual quality and robustness.