[opendtv] Re: ATSC-Mobile
- From: Mark Aitken <maitken@xxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Mon, 12 Feb 2007 10:58:23 -0500
http://www.tvnewsday.com/articles/2007/02/12/daily.11/
********************************
project eagle
HARRIS CHALLENGES SAMSUNG, R&S IN MOBILE TV
TVNEWSDAY, Feb. 12, 8:42 AM ET
The hardware/software vendor says it has a better way for TV stations to
broadcast programming to mobile devices than the much-publicized A-VSB,
but it is not ready to provide details.
By Harry A. Jessell
Samsung and Rohde & Schwarz have attracted a lot of attention lately
<http://all-access.cstv.com/cstv/player/player.html?code=cs> with their
A-VSB technology that would enable TV stations to use a portion of their
ATSC digital signals to broadcast programming directly to cell phone and
other mobile devices.
Now, Harris wants in on the action.
The broadcast hardware and software vendor told reporters at a pre-NAB
luncheon in New York last Friday that it is developing a mobile
broadcasting system to rival A-VSB.
"We want to address the mobile market situation and retail all of the
advantages of ATSC," said Harris VP Jay Adrick.
Dubbed Project Eagle, the new transmission scheme offers greater signal
strength and payload than A-VSB, Adrick said.
"A-VSB is not fully ATSC compatible and there are some things you give
up to implement it," he said.
Adrick said he was not ready to provide details about the Project Eagle.
However, he said Harris has been testing its system in a large city with
a low-power, one-watt transmitter and has been receiving signals on
devices moving at 60 miles per hours.
And, he said, Harris will soon begin testing it on a full-power TV
station, and expects to announced test results and partners at the NAB
convention in April.
Until Harris is prepared to say more, it is impossible to compare the
competing system.
But Samsung and Rohde & Schwarz clearly has a head start.
The A-VSB developers have done extensive real-world testing with the
Sinclair Broadcast Group and they expect the Advanced Television Systems
Committee to standardize the system this year. That would clear the way
for widespread implementation.
A-VSB works by borrowing a portion (1-3 megabits per second) of the 19.4
mbps DTV data stream to generate a tracking signal (aka the
Supplementary Reference Sequence or SRS).
The tracking signal gives A-VSB-equipped receivers a digital description
of what the video should look like so that they can stay locked on to
the video under mobile or other tough reception conditions.
Harris has been involved in developing transmitters for the FLO
<http://www.broadcast.harris.com/product_portfolio/product_details.asp?sku=WWWATLASMOBILE>
and DVB-H <http://www.broadcast.harris.com/television/mobile/dvbh.asp>
mobile transmission systems. Unlike A-VSB and Project Eagle, they are
incompatible with the broadcasters' ATSC digital signal.
Mark Schubin wrote:
That's what Harris called their competitive proposal to A-VSB at their
pre-NAB press conference today. They say it is 7 dB better and has a
2:1 bit penalty instead of 4:1. They plan to have more details at NAB.
TTFN,
Mark
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Regards,
Mark A. Aitken
Director, Advanced Technology
<>< <>< <>< <>< <>< <>< <><
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