2010 CES XstreamHD

Discussion in 'XStreamHD (Closed Forum)' started by Christopher Gould, Jan 6, 2010.

  1. smiddy

    smiddy Tain't ogre til its ogre

    15,654
    122
    Apr 5, 2006
    The server requires GigE...it was a great display of what they can do. However I wish I could see MPEG-4. The average on one show was about 45 Mbps.
     
  2. jdeitchler

    jdeitchler Mentor

    38
    0
    Oct 10, 2005
    (2) DVB-S2 transponders at ~75 Mbps each for a total of 150 Mbps.
     
  3. P Smith

    P Smith Mr. FixAnything

    25,673
    478
    Jul 25, 2002
    W.Mdtrn Sea
    Known basic tech specs of AMC-16 (24 tpns 36 MHz) would you present a combination of 8PSK/DVB-S2 parameters (SR and FEC) what will provide such enormous bandwidth [75 Mbps] for one transponder ? Please.
     
  4. FTA Michael

    FTA Michael Hall Of Fame

    3,474
    5
    Jul 21, 2002
    At the booth presentation song & dance, they said that the HD Media Receiver would have 3 OTA tuners for recording or viewing OTA programming. But at least I got a T-shirt. :)

    BTW, I didn't write about XStream because I figured correctly that some of the more fervent HD fans here would handle it. Sounds to me like they're pitching to an upscale, HD picture quality-sensitive client base. Will there be enough folks like that who won't get a Blu-ray or internet-based home theater setup?

    I've got the spec sheets for the HD Media Server, HD Media Receiver, and Pro Media Receiver if anyone wants to see them. As far as I can tell, they're about the same as those available here: http://www.xstreamhd.com/mediaresources.html.
     
  5. jdeitchler

    jdeitchler Mentor

    38
    0
    Oct 10, 2005
    Are you saying that 30.0 Msps with 8/9 FEC using 8PSK-DVBS2 is not possible?
     
  6. P Smith

    P Smith Mr. FixAnything

    25,673
    478
    Jul 25, 2002
    W.Mdtrn Sea
    Umm ? What is your relation between Msps and Mbps ?
    Why you lowered number ? In prev post it was much high:
     
  7. jdeitchler

    jdeitchler Mentor

    38
    0
    Oct 10, 2005
    MSPS = Mega symbols per second (a variable in calculating usable payload for a satellite transponder)
    Mbps = Mega bits per second (as in data measurement)

    30 MSPS * 3 bits per symbol (for 8PSK) * 8/9 FEC * 188/204 (Reed Solomon) ~ 75 Mbps
     
  8. P Smith

    P Smith Mr. FixAnything

    25,673
    478
    Jul 25, 2002
    W.Mdtrn Sea
    Ideally, but that's FEC=8/9 ... perhaps 9/10 would be better, but for low power FSS sat ?

    OK, it's time to find real numbers from AMC-16.
     
  9. P Smith

    P Smith Mr. FixAnything

    25,673
    478
    Jul 25, 2002
    W.Mdtrn Sea
    Surfing the AMC-16 and I don't see signal close to before mentioned
    "30 MSPS * 3 bits per symbol (for 8PSK) * 8/9 FEC * 188/204 (Reed Solomon) ~ 75 Mbps".

    Max levels at :
    11804,V,DVB-S,21500 - ~33 mbps [ESM]
    12147,V,??????,30000 (my cards can not lock to it as DVB-S or DVB-S2 or DC-II !)
    11997,H,DVB-S2,24000 - ~40 mbps [AOL]
    12030,H,DVB-S2,24000 - ~46 mbps [AOL]

    I don't see how you would accumulate 2x75 Mbps and 150 Mbps total.
    And remember - the sat is FSS, ie low powered.
     
  10. P Smith

    P Smith Mr. FixAnything

    25,673
    478
    Jul 25, 2002
    W.Mdtrn Sea
    Time to look into Ka part of the sat ;).
     

Share This Page

spam firewall