[opendtv] Re: 1080p @ 60 is Next?
- From: "peter wilson" <peter.wilson@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 9 May 2007 13:34:50 +0100
Hi All,
This is an interesting point, as pointed out before Numedia Technology has
seen around 455 ft in the lab at 3Gbps though products are specified at less
than this distance to give margin for system degradation.
Going to fibre is not straightforward @ 3Gbps as the parts required are not
so popular. Video vendors often use 2Gbps lasers running slow or 1.25 Gbps
lasers overdriven. Lasers for 3 Gbps are not readily available from other
business area's so tend to be very expensive. Some current FPGA parts are
fast enough to support 3G processing.
In the short term its probable that you would use fibre dual link with Cwdm
or like the BBC, Dirac Pro (VC2) mezzanine compression which costs les than
twin lasers and all the WDM stuff.
For some unknown reason the SMPTE number I quoted was actually a local road
number so to correct this SMPTE 424 is the transport document and SMPTE 425
is the packaging document.
Best regards,
Peter
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From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] On
Behalf Of ShLampen@xxxxxxx
Sent: 09 May 2007 04:45
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: 1080p @ 60 is Next?
In a message dated 05/04/2007 10:35:55 AM Pacific Daylight Time,
dan.grimes@xxxxxxxx writes:
I think the next interconnect should go to fiber because the potential
bandwidth is much greater than for copper. There are other issues I
realize, but most have been satisfactorily addressed. I am not sure if the
processing power is there yet for the equipment, but the fiber interconnect
is now easily capable of 1080p@60 4:4:4(:4).
If you need to go more than 500 ft. for 1080p/60, I'd say, sure, use fiber.
The SMPTE safe distance for Belden 1694A (calculated) is 270 ft. These
calculations look to be about half way to the cliff (hence my 500 ft.
number) although I saw some AMAZING demonstration at the Gennum secret room
that blows away any distance numbers I give you. (I would tell you more but
am restricted by an NDA.) Go ask Gennum.
I think fiber will get its fair share of installs, but copper is not dead
yet.
Steve Lampen
Belden
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