多址攻击下公共信息嵌入容量域的内外界
Inner and Outer Bounds for the Public Information Embedding Capacity Region Under Multiple Access Attacks
摘要：
我们考虑了一个公开的多用户信息嵌入（水印）系统，其中两个消息（水印）被独立地嵌入到两个相关的covertexts，并通过一个多址攻击信道传输。研究了两种嵌入器的可实现嵌入率和平均失真之间的权衡。对于给定的失真水平，嵌入容量区域的内界和外界以单字母的形式获得。更严格的界限也给独立的covertexts。
英文摘要：
We consider a public multi-user information embedding (watermarking) system in which two messages (watermarks) are independently embedded into two correlated covertexts and are transmitted through a multiple-access attack channel. The tradeoff between the achievable embedding rates and the average distortions for the two embedders is studied. For given distortion levels, inner and outer bounds for the embedding capacity region are obtained in single-letter form. Tighter bounds are also given for independent covertexts.
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