Joint compression and watermarking: theory, algorithms, and applications

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Personal multimedia communications, which involves the seamless integration of the telephone, television, and computer and is concerned with efficient, reliable and secure distribution and storage of digital media to people and machines through different channels, is a major area of growth in engineering today. However, before multimedia communications can happen successfully in various environments such as wireless and mobile environments and will change our lives and economy for many years to come, many challenging problems have to be resolved. Among them are data compresson to efficiently utilize existing limited storage and bandwidth resources, and digital watermarking to provide techniques and tools for digital right management. So far, to a large extent, data compression and watermarking have been investigated and designed separately. Since in personal multimedia communications, watermarked signals will be likely stored and/or transmitted in compressed format, instead of treating watermarking and compression separately, it is interesting and beneficial to look at joint design of watermarking and compression schemes. In this research, we will investigate joint compression and watermarking systematically. Our scientific objectives are to further extend existing information theoretic results on joint compression and watermarking, to establish new theoretic frameworks for new configurations of joint compression and watermarking, to design efficient and robust joint compression and watermarking algorithms by extending source coding techniques to include watermarking capability, and to apply our results to current compression standards such as JPEG for still image compression, MP3 and AAC for audio compression, and MPEG-2 and H.264 for video compression, to see how they can be optimized and modified to support watermarking capability while maintaining or even improving their compression performance.