Bede Liu – författare

The digital revolution has brought about profound changes in our society and our lives. This book discusses the issues regarding multimedia data hiding and its application to multimedia security and communication, addressing both theoretical and practical aspects and tackling both design and attack problems. The book is organized into three parts. In the fundamental issues part, a few key elements of data hiding are identified through a layered structure; data hiding is modeled as a communication problem where the embedded data is the signal to be transmitted. A comprehensive solution is proposed that addresses considerations for choosing constant- or variable embedding rate and enhancing performance in each case. Algorithm and system designs are presented in the second part for binary images, grayscale and color images, and videos. The designs provide concrete examples, such as annotation, tamper detection, copy/access control, fingerprinting, and ownership protection. Finally, in the third part, attacks and countermeasures for both known and unknown data-hiding algorithms are considered, respectively, for problems surrounding digital watermarking and digital music.

The digital information revolution has brought about profound changes in our society and our life. New devices and powerful software have made it possible for consumers worldwide to create, manipulate, share, and enjoy the multimedia information. Internet and wireless networks offer ubiquitous channels to deliver and to exchange multimedia information for such pur­ poses as remote collaboration, distant learning, and entertainment. With all these advances in multimedia coding and communication technologies over the past decade, the major hurdle for allowing much broader access of multimedia assets and deployment of multimedia services no longer lies with bandwidth-related issues, but with how to make sure that content is used for its intended purpose by its intended recipients. The core issue then be­ comes the development of secure management of content usage and delivery across communication networks. Data hiding and digital watermarking are promising new technologies for multimedia information protection and rights management. Secondary data can be embedded imperceptibly in digital multimedia signals for a variety of applications, including ownership protection, authentication, access con­ trol, and annotation. Data hiding can also be used to send side information in multimedia communication for providing additional functionalities or for enhancing performance. The extraction of the embedded data mayor may not need knowledge of the original host media data. In addition to im­ perceptibility, robustness against moderate processing such as compression is also an important consideration.