计算机应用研究2011，Vol.28Issue(5)：1940-1942,3.DOI:10.3969/j.issn.1001-3695.2011.05.098
一种基于索引约束矢量量化的脆弱音频水印算法
Fragile watermarking scheme based on index constrained vector quantization
摘要
Abstract
Unlike normal vector quantization, index constrained vector quantization could limit the range of searching codewords by selecting a constrained position in the index in the process of quantization.This paper made use of this special searching method and the proposed algorithm reached the purpose of adding watermark in audio signal.First segmented the original audio signal into several frames, performed DCT transform on every frame and extracted the middle-frequnency coefficients to form vectors.The embedding procedure could be described as finding matching codewords to modify the DCT middlefrequency coefficient vectors in accordance with the watermarking bits and the constrained bits.It adopted normal vector quantization in the extracting procedure, extracted the constrained bits in the same position as the watermarking information.This scheme is real-time because the watermarks can be embeded in the quantization process.The experimental results show that the watermarking is fragile and can be used for authentication.关键词
音频水印/索引约束矢量量化/脆弱水印/认证Key words
audio watermarking/ index constrained vector quantization/ fragile watermarking/ authentication分类
信息技术与安全科学引用本文复制引用
周赟,王让定..一种基于索引约束矢量量化的脆弱音频水印算法[J].计算机应用研究,2011,28(5):1940-1942,3.基金项目
国家自然科学基金资助项目(60873220) （60873220）
宁波市自然科学基金资助项目(2009A610085) （2009A610085）
