Multimedia watermarking techniques

Multimedia watermarking technology has evolved very quickly during the last few years. A digital watermark is information that is imperceptibly and ro bustly embedded in the host data such that it cannot be removed. A watermar k typically contains information about the origin, status, or recipient of the host data. In this tutorial paper, the requirements and applications fo r watermarking ale reviewed. Applications include copyright protection, dat a monitoring, and data tracking. The basic concepts of water mar king syste ms are outlined and illustrated with proposed watermarking methods for imag es, video, audio, text documents, and other media. Robustness and security aspects are discussed in detail. Finally, a few: remarks are made about the state of the art and possible future developments in watermarking technolo gy.