Ron Economos wrote: > But you need some kind if A/V wrapper to deal with > audio, timestamps for A/V synchronization and > timestamp clock recovery at the decoder. MPEG-2 TS > provides all of those facilities and there is no > (AFIK) usage based royalty fee. The multiplexer > manufacturer takes care of any royalty fee (of > course, indirectly passing on the cost to their > customers). Right you are. I neglected to include RTP/RTCP (Real Time Protocol and Real Time Control Protocol) in the stack of required protocols. This provides the synchronization and resynchronization you need, even in cases where a single stream is generated out of multiple independent streams. See RFCs 3550 and 3551. Also, for many additional bells and whistles, e.g as you might need for a complete VOD solution, you can implement RTSP (Real Time Streaming Protocol), RFC 2326. This gives the PAUSE and PLAY and SETUP type of commands. RTP/RTCP are designed specifically to work over non-QoS guaranteed media, which is why they are well suited to IPTV. Obviously, there's a limit to how bad the underlying network can be. However, Gary Hughes has a point, that in order to reuse what was developed for cable, use of MPEG-2 TS might have its advantages even over an IPTV net. Bert ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.