This Chapter simply contains multimedia - an integrated and interactive presentation of speech, audio, video, graphics and text, has become a major theme in today's information technology that merges the practices of communications, computing and information processing into an interdisciplinary field. The challenge of multimedia communications is to provide services that integrate text, sound, image and video information and to do it in a way that preserves the case of use and interactivity. A brief description of the elements of multimedia systems is presented. User and network requirements are discussed together with the pocket transfer concept. About Multimedia communication standards a general idea is also given. Multimedia transport over ATM and IP networks discussed in brief. The issues pertaining to multimedia digital subscriber lines are outlined together with multimedia over wireless, mobile and broadcasting networks as well as digital TV infrastructure for interactive multimedia services.
A Study on Digital Watermarking Techniques