摘要： 在基于量化索引调制(QIM)嵌入技术的数字指纹系统中，量化步长越大，系统抗共谋攻击的性能越差。针对上述情况，提出一种改进的抗共谋指纹方案。在嵌入指纹前将随机抖动信号加入到宿主信号，由此增强指纹信号的连续性，提高系统的抗共谋攻击性能。实验结果表明，采用改进方案的QIM指纹系统检测率更高。
关键词:
数字指纹系统,
高斯指纹,
量化索引调制,
抗共谋,
失真估计
Abstract: In digital fingerprinting system based on Quantization Index Modulation(QIM), higher the value of quantization step size is, worse the detection performance is. To resolve this problem, an improved QIM-based fingerprinting scheme is proposed to improve the continuity of fingerprinting signal and enhance the collusion resistance of fingerprinting system before fingerprinting imbedding by adding a random dither signal to the host signal. Simulation results show that the improved fingerprinting system has better detection probability than traditional QIM-based fingerprinting system.
Key words:
digital fingerprinting system,
Gauss fingerprint,
Quantization Index Modulation(QIM),
anti-collusion,
distortion evaluation
中图分类号:
程格平, 袁磊, 魏希三. 基于量化索引调制的抗共谋指纹改进方案[J]. 计算机工程, 2012, 38(12): 102-104.
CHENG Ge-Beng, YUAN Lei, WEI Xi-San. Improved Anti-collusion Fingerprinting Scheme Based on Quantization Index Modulation[J]. Computer Engineering, 2012, 38(12): 102-104.