Patent ID: 6564262
Filing Date: 2003-05-13
Classification: H04N

Abstract:
In a client computer coupled to a server via a network, a method for receiving data from said server, said data streamed via at least two multicast groups, said method comprising:receiving said data from said server via said at least two multicast groups; selecting a first suitable multicast group from said at least two multicast groups, said selected first multicast group associated with a first base layer and a first at least one enhancement layer of said data which best matches a target bandwidth of said client computer; joining said selected first multicast group; detecting a change in desired bandwidth of said client computer; selecting a second suitable multicast group from said at least two multicast groups, said selected second multicast group associated with a second base layer and a second at least one enhancement layer of said data which best matches the changed target bandwidth of said client computer; joining said selected second multicast group; and wherein the first multicast group and the second multicast group are joined concurrently.