IP MULTICAST OF REAL-TIME MPEG OVER ATM

IP and ATM multicasting are compared, and current approaches for trans porting IP multicast over ATM networks are reviewed. The use of ATM ba ckbones to carry multiple high quality video streams is noted, and the relative strengths and weaknesses of ATM Forum LAN Emulation and rece nt IETF proposals for carrying IP multicast over ATM are discussed. An experimental application is described for multicasting multiple MPEG- 1 video streams between routers connected over a live ATM campus netwo rk, and IP multicast services are noted as increasingly important and powerful in the development of the so-called Information Superhighway.