The growth of Asynchronous Transfer Mode (ATM) technology and the maturity of coding standards have made the large-scale deployment of high-quality audiovisual services possible. In this article, we discuss the principal issues involved in transporting MPEG-2 streams over ATM networks for both constant bit-rate (CBR) and variable bit-rate (VBR) MPEG-2 Transport Streams. We review existing and proposed approachesto deal with these issues and evaluate some of them by simulation to demonstrate the important tradeo s in the design of networked audiovisual systems.