Jump to content


Welcome to DBSTalk


Sign In 

Create Account
Welcome to DBSTalk. Our community covers all aspects of video delivery solutions including: Direct Broadcast Satellite (DBS), Cable Television, and Internet Protocol Television (IPTV). We also have forums to discuss popular television programs, home theater equipment, and internet streaming service providers. Members of our community include experts who can help you solve technical problems, industry professionals, company representatives, and novices who are here to learn.

Like most online communities you must register to view or post in our community. Sign-up is a free and simple process that requires minimal information. Be a part of our community by signing in or creating an account. The Digital Bit Stream starts here!
  • Reply to existing topics or start a discussion of your own
  • Subscribe to topics and forums and get email updates
  • Send private personal messages (PM) to other forum members
  • Customize your profile page and make new friends
 
Guest Message by DevFuse

Photo
- - - - -

2010 CES XstreamHD


  • Please log in to reply
29 replies to this topic

#21 OFFLINE   smiddy

smiddy

    Tain't ogre til its ogre

  • Registered
  • 15,451 posts
Joined: Apr 05, 2006

Posted 10 January 2010 - 12:53 AM

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.
Aaron 'smiddy' Smith

...Ads Help To Support This SIte...

#22 OFFLINE   jdeitchler

jdeitchler

    Mentor

  • Registered
  • 38 posts
Joined: Oct 10, 2005

Posted 10 January 2010 - 07:01 AM

(2) DVB-S2 transponders at ~75 Mbps each for a total of 150 Mbps.

#23 OFFLINE   P Smith

P Smith

    Mr. FixAnything

  • Registered
  • 20,057 posts
  • LocationMediterranean Sea
Joined: Jul 25, 2002

Posted 10 January 2010 - 01:42 PM

(2) DVB-S2 transponders at ~75 Mbps each for a total of 150 Mbps.

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.

#24 OFFLINE   FTA Michael

FTA Michael

    Hall Of Fame

  • Registered
  • 3,474 posts
Joined: Jul 21, 2002

Posted 10 January 2010 - 09:25 PM

It says "Broadcast programming", how does that work?

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...aresources.html.
Yes, FTABlog is active again. Why do you ask?

#25 OFFLINE   jdeitchler

jdeitchler

    Mentor

  • Registered
  • 38 posts
Joined: Oct 10, 2005

Posted 29 January 2010 - 11:09 AM

Are you saying that 30.0 Msps with 8/9 FEC using 8PSK-DVBS2 is not possible?

#26 OFFLINE   P Smith

P Smith

    Mr. FixAnything

  • Registered
  • 20,057 posts
  • LocationMediterranean Sea
Joined: Jul 25, 2002

Posted 29 January 2010 - 11:34 AM

Are you saying that 30.0 Msps with 8/9 FEC using 8PSK-DVBS2 is not possible?

Umm ? What is your relation between Msps and Mbps ?
Why you lowered number ? In prev post it was much high:

(2) DVB-S2 transponders at ~75 Mbps each for a total of 150 Mbps.



#27 OFFLINE   jdeitchler

jdeitchler

    Mentor

  • Registered
  • 38 posts
Joined: Oct 10, 2005

Posted 01 February 2010 - 01:44 PM

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

#28 OFFLINE   P Smith

P Smith

    Mr. FixAnything

  • Registered
  • 20,057 posts
  • LocationMediterranean Sea
Joined: Jul 25, 2002

Posted 01 February 2010 - 03:22 PM

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.

#29 OFFLINE   P Smith

P Smith

    Mr. FixAnything

  • Registered
  • 20,057 posts
  • LocationMediterranean Sea
Joined: Jul 25, 2002

Posted 08 February 2010 - 07:23 PM

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.

Edited by P Smith, 11 February 2010 - 12:37 PM.
Two tpns shows AOL id.


#30 OFFLINE   P Smith

P Smith

    Mr. FixAnything

  • Registered
  • 20,057 posts
  • LocationMediterranean Sea
Joined: Jul 25, 2002

Posted 11 February 2010 - 01:45 AM

Time to look into Ka part of the sat ;).

Ka-band

Main transponders 12
Backup transponders 6
Power 75 W (LTWTA)
Bandwidth 125 MHz (3 x 39 MHz subchannels)
Coverage CONUS, Hawaii, Alaska; 12 spots
EIRP max 57 dBW
Polarization
Frequencies Uplink: 28.4-28.6 GHz & 29.5-30 GHz
Downlink: 18.6-18.8 GHz & 19.7-20.2 GHz






Protected By... spam firewall...And...