This text systematically covers both network and signal processing requirements for achieving efficient video communication systems based on fast packet transmission. As it considers the features of the emerging broadband digital networks and state-of-the-art digital video signal processing technologies, the book includes complete descriptions of digital network evolution based on fast packet transmission, characterization of visual media, modelling of video signals, variable rate video/multimedia coding technologies, new user/network interface technologies and the video processing algorothms required. The book's dual coverage of network and signal processing requirements should make it a useful reference for newcomers to design.