提出了量化MCLT 變換系數的音頻數字水印盲檢新算法。嵌入的水印為視覺可辨的二值標志圖像，對水印降維處理后，利用密鑰通過PN 序列發生器產生的偽隨機序列調制水印信息，然后通過量化MCLT 系數的方法將其嵌入音頻中。通過大量實驗，得到了決定水印魯棒性和不可感知性的量化參數選擇上限。實驗結果表明，該算法對所嵌水印的音頻質量未見降低，對信號處理和隨機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.