南京理工大学学报（自然科学版）
南京理工大學學報（自然科學版）
남경리공대학학보（자연과학판）
JOURNAL OF NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
2015年
1期
50-55
,共6页
崔得龙%弓云峰%余桂兰
崔得龍%弓雲峰%餘桂蘭
최득룡%궁운봉%여계란
音频水印%鲁棒水印%范重心%离散余弦变换%自适应水印%盲水印%原始音频信号
音頻水印%魯棒水印%範重心%離散餘絃變換%自適應水印%盲水印%原始音頻信號
음빈수인%로봉수인%범중심%리산여현변환%자괄응수인%맹수인%원시음빈신호
audio watermarking%robustness watermarking%normed centre of gravity%discrete cosine transform%adaptive watermarking%blind watermarking%original audio signals
为了实现数字音频版权保护，利用音频信号低阶统计量的稳定性和离散余弦变换的去相关性，设计了一种基于范重心的自适应量化音频盲水印算法。原始音频信号按固定长度分帧，计算分帧音频范重心坐标并确定水印嵌入候选区域，水印信息自适应量化嵌入选中的离散余弦变换中低频系数。实验结果证明：该音频水印算法具有鲁棒性和有效性，同时密钥的使用保证了算法的安全性。
為瞭實現數字音頻版權保護，利用音頻信號低階統計量的穩定性和離散餘絃變換的去相關性，設計瞭一種基于範重心的自適應量化音頻盲水印算法。原始音頻信號按固定長度分幀，計算分幀音頻範重心坐標併確定水印嵌入候選區域，水印信息自適應量化嵌入選中的離散餘絃變換中低頻繫數。實驗結果證明：該音頻水印算法具有魯棒性和有效性，同時密鑰的使用保證瞭算法的安全性。
위료실현수자음빈판권보호，이용음빈신호저계통계량적은정성화리산여현변환적거상관성，설계료일충기우범중심적자괄응양화음빈맹수인산법。원시음빈신호안고정장도분정，계산분정음빈범중심좌표병학정수인감입후선구역，수인신식자괄응양화감입선중적리산여현변환중저빈계수。실험결과증명：해음빈수인산법구유로봉성화유효성，동시밀약적사용보증료산법적안전성。
In view of the low-level steady statistics of audio signal and uncorrelated property of discrete cosine transform( DCT) ,an adaptively quantized audio blind watermarking algorithm based on normed centre of gravity ( NCG ) is proposed here to achieve the copyright protection of digital audio. The original audio signal is framed by equalized length. The coordinates of NCGs are detected from the framed audio,and the watermark is embedded into the region which includes the NCGs. The adaptively quantized watermarking information is embedded in the low frequent coefficients of DCT domain. Experimental results show that the scheme has robustness and effectiveness and the algorithm security is guaranteed by using secret keys.
