| 基于区间设定的DCT域视频水印算法 |
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| 引用本文： | 吴昊,唐向宏,陈宏炳,王永.基于区间设定的DCT域视频水印算法[J].杭州电子科技大学学报,2014(2):20-23. |
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| 作者姓名： | 吴昊 唐向宏 陈宏炳 王永 |
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| 作者单位： | [1]杭州电子科技大学通信工程学院,浙江杭州310018 [2]阿里云计算有限公司,浙江杭州311121 |
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| 摘 要： | 结合H.264/AVC编解码标准和编解码器的结构,该文提出一种基于I帧压缩域DCT量化系数的视频水印方法。根据DCT量化系数的特点,选择intra4×4模式下DC系数非零的4×4DCT子块作为水印嵌入块,采取区间设定的方式将水印嵌入到低频非零系数中去。在解码端,提取相应位置DCT系数值,利用区间设置关系检测水印,属于盲检测。实验仿真结果表明,该算法具有较小的码率变化和较好鲁棒性。
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| 关 键 词： | 量化参数 鲁棒性 视频编解码 区间选取 |
DCT Domain Video Watermarking Algorithm Based on the Interval |
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| Wu Hao,Tang Xianghong,Chen Hongbing,Wang Yong.DCT Domain Video Watermarking Algorithm Based on the Interval[J].Journal of Hangzhou Dianzi University,2014(2):20-23. |
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| Authors: | Wu Hao Tang Xianghong Chen Hongbing Wang Yong |
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| Affiliation: | 1. School of Communication Engineering, Hangzhou Dianzi University, Hangzhou ij/ang 310018, China; 2. Alibaba Cloud Computing Co. Ltd., Hangzhou Zhejiang 310018 , China) |
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| Abstract: | In this paper,combining with the H. 264 /AVC codec standards and codec structures,a video watermark algorithm based on DCT quantization coefficients of the I-frame compression domain is proposed. According to the characteristics of the DCT quantization coefficients,the 4＊ 4 DCT sub-blocks which have the non-zero DC coefficients and predict through the intra4 ＊ 4 prediction model,are selected as watermarking embedded blocks. At the decoder,the watermark can be extracted by using the relationship between the setting interval and the DCT coefficients in the corresponding position. The simulation results show that proposed method has little the change in bit-rate and better robustness. |
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| Keywords: | quantization coefficient robust watermark video coding interval setting |
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