CAJ | 학술논문

该文结合H．264/AVC视频编码特点，提出一种利用结构特征的脆弱水印算法。利用4×4DCT子块在宏块中的位置信息和该子块中最后一位非零量化系数之间的差值，通过LSB位的替换方法，将水印信息嵌入到该子块中所选的非零系数中，然后将嵌有水印的DCT量化系数通过熵编码写入比特流中进行传输。实验仿真结果表明，该算法具有较好的脆弱性，对视频的影响较小。
해문결합H．264/AVC시빈편마특점，제출일충이용결구특정적취약수인산법。이용4×4DCT자괴재굉괴중적위치신식화해자괴중최후일위비령양화계수지간적차치，통과LSB위적체환방법，장수인신식감입도해자괴중소선적비령계수중，연후장감유수인적DCT양화계수통과적편마사입비특류중진행전수。실험방진결과표명，해산법구유교호적취약성，대시빈적영향교소。
Based on H .264/AVC video coding characteristics , a kind of fragile watermarking algorithm using the structure characteristics is proposed .Using difference between DCT block position information in the mac-roblock and the last non-zero quantitative coefficient of the DCT block , and through the LSB replacement method, the watermark information is embedded into the last non-zero coefficient of selected block , then DCT quantized coefficients which are embedded by watermark are write to the bit stream .The algorithm keeps the better video quality .