采用量化MCLT變換系數(shù)的音頻數(shù)字水印盲檢算法

提出了量化MCLT 變換系數(shù)的音頻數(shù)字水印盲檢新算法。嵌入的水印為視覺(jué)可辨的二值標(biāo)志圖像，對(duì)水印降維處理后，利用密鑰通過(guò)PN 序列發(fā)生器產(chǎn)生的偽隨機(jī)序列調(diào)制水印信息，然后通過(guò)量化MCLT 系數(shù)的方法將其嵌入音頻中。通過(guò)大量實(shí)驗(yàn)，得到了決定水印魯棒性和不可感知性的量化參數(shù)選擇上限。實(shí)驗(yàn)結(jié)果表明，該算法對(duì)所嵌水印的音頻質(zhì)量未見(jiàn)降低，對(duì)信號(hào)處理和隨機(jī)裁剪型的攻擊具有很高的魯棒性。

A new audio digital watermarking blind algorithm based on MCLT coefficient quantization is
presented. The embedded watermark is a visually recognizable image. After converting the binary watermark image into one-dimension sequence, the sequence is then modulated with m-sequence. Finally, the watermark is embedded into the audio signal by modifying the selected coefficients in the quantification process. The upper limit of quantization parameter is found by lots of listening test. Experimental results demonstrate that the embedding strategy is effective and the embedded watermark is inaudible and sustainable against compression algorithms, and common signal processing manipulation attacks.