用于篡改檢測及認(rèn)證的脆弱音頻水印算法
Fragile Audio Watermarking Algorithm for Telltale Tamper Proofing and Authentication
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摘要: 該文提出一種新的用于確保音頻作品可信性的脆弱水印算法.心理聲學(xué)模型控制音頻信號的小波包分解和小波包域內(nèi)水印的嵌入量,增強(qiáng)了水印嵌入的透明度和靈活性.與現(xiàn)有算法不同,該算法在單一系數(shù)上嵌入多位水印,可以更加準(zhǔn)確地反映篡改的程度.通過引入篡改檢測函數(shù),可同時進(jìn)行完整性認(rèn)證和在時/頻域定位篡改并給出篡改程度的度量.仿真實驗結(jié)果顯示該算法能有效地檢測和定位篡改,可用于衡量法庭證據(jù)及新聞廣播等的可信度.
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關(guān)鍵詞:
- 多媒體認(rèn)證; 數(shù)字音頻水印; 心理聲學(xué)模型; 小波包分解
Abstract: A novel watermarking scheme to ensure the credibility of audio is proposed in this paper. Psychoacoustic model controls the wavelet packet decomposition as well as the watermark insertion in the wavelet packet domain, which enhances both the transparency and the flexibility of the algorithm. Unlike previously proposed algorithms, the presented method embeds several bits of watermark instead of just one in a single coefficient. By introducing the detecting function, the new scheme can not only authenticate the integrity of the audio signal but also locate the tampered＇region and decide to what extent the audio being tampered. Experimental results show that the proposed scheme has the desired property and can be used for applications including authentication for forensic identification and news broadcasting. -
Lu Chunshien, Liao Hongyuan, Chen Lianghua. Multipurpose audio watermarking. in Proc. 15th International Conference on Pattern Recognition, Barcelona Spain, Sep. 2000, 3:3286 - 3289.[2]Kundur D, Hatzinakos D. Digital watermarking for telltale tamper proofing and authentication[J].Proc. of the IEEE.1999, 87(7):1167-[3]Podilchuk C I, Delp E J. Digital watermarking: algorithms and applications[J].IEEE Signal Processing Magazine.2001, 18(4):33-[4]Gordy J D, Bruton L T. Performance evaluation of digital audio watermarking algorithms, Proceedings of the 43rd IEEE Midwest Symposium on Circuits and Systems, Aug. 2000, 1: 456 - 459.[5]Pan D Y. Digital audio compression. Digital Technical Journal,1993, 5(2): 1 - 14.[6]ISO/IEC IS 11172-3, Coding of moving pictures and associated audio for digital storage media at up to about 1.5 Mbit/s-Part 3:Audio. 1992.[7]Pan D. A tutorial on MPEG/audio compression. IEEE Multimedia,1995, 2(2): 60 - 74. -
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