Craig Birkmaier wrote: > MPEG-2 TS is widely used and has the flexibility to > evolve since it is just a packet data format with > headers and descriptors. The only real question is > whether it is the most efficient transport available? Compared with what? It's certainly more flexible than, say, Ethernet. I don't see this as a major issue. > It would be a worthwhile endeavor to revisit this > issue to see what the optimum packet size(s) should > be for various channels with different BERs. Yes, but MPEG-2 TS does not limit you to just one size. In fact, ATSC and DVB-T use different size packets for program streams. In any event, for synchronous streams, you don't want large frames. For data, MPEG-2 TS as used in A/90 goes way up to something like 4500 or 10,000 bytes, depending on profile used. Which is right up there with the best of the link layer techniques. > There may be some validity in moving to something > like TCP/IP, if for no other reason than to > minimize packet repacking for transmission. You're confusing the link layer (e.g. MPEG-2 TS or Ethernet) with the transport layer (e.g. IP). IP packets are carried inside MPEG-2 TS frames, just like IP packets are carried inside Ethernet frames in wired LANs, or inside 802.11 frames in WLANs. 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.