The availability of increased computational power and the proliferation of the Internet have facilitated the production and distribution of unauthorized copies of multimedia information. As a result, the problem of multimedia copyright protection has attracted the interest of the worldwide scientific and the business communities. The most promising solution seems to be the watermarking process where the original data is marked with ownership information hidden in an imperceptible manner in the original signal. Watermarking in Audio: Key Techniques and Technologies is an inclusive compilation of the most important and fundamental theories and techniques in digital audio watermarking. It includes a comprehensive overview of the state-of-the-art techniques used in digital audio watermarking and focuses on two key issues in digital audio watermarking: psychoacoustic modeling and synchronization. The fundamental theories and the innovative techniques introduced in this book can be directly applied not only to digital audio watermarking, but also to perceptual digital audio coding. Watermarking in Audio will serve as an essential reference to the scientists and researchers in digital audio and related fields, including engineering and information technology.