基于视频压缩编码的动态图像水印方案 |
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引用本文: | 万书振.基于视频压缩编码的动态图像水印方案[J].教育技术导刊,2009,8(2):174-176. |
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作者姓名: | 万书振 |
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作者单位: | 仰恩大学; |
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基金项目: | 仰恩大学教育教学建设与改革研究课题(YEU2007(A035)) |
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摘 要: | 提出了一种新的基于视频压缩编码的动态图像水印方案。在嵌入水印时,充分考虑动态图像压缩编码的特性,对帧内编码帧(I帧),将水印信息嵌入到DCT低频系数中;而对帧间编码帧(P,B帧),结合动态补偿/离散余弦变换(MC/DCT)混介编码,把水印信息嵌入到运动补偿后的残差图像的自流成分中。同时,在水印嵌入时,采用扩频技术与多维水印相结合的方法,并通过相关检测的方法判断水印的存在。由于水印的检测是对视频码流直接实施的,不需要对压缩数据进行完全解码,从而大大降低了计算量,提高了视频数据水印的适用性。
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关 键 词: | 数字水印 视频H.263 MPEG-2版权保护 |
Video Watermarking Combining with Hybrid Coding |
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Abstract: | A watermarking scheme combining with hybrid video coding is proposed. The intra-coded frame, which is called intra-frame, is blocked and discrete cosine transformed (DCT), watermark is embedded in the low-frequency coefficients in DCT domain. While for the inter-coded frame, the blocked motion compensation is discrete cosine transformed as in I frame, then the DC coefficient in the DCT matrix is watermarked. In this scheme, human perceptual model is considered. In the process of embedding, spread spectrum t... |
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Keywords: | Digital Watermark Copyright Protection Spread Spectrum MPEG-2 H 263 Hybrid Coding |
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