[opendtv] Re: Seeing Ghosts on a Single Frequency Network
- From: Mark Aitken <maitken@xxxxxxxxxx>
- To: craig@xxxxxxxxx, opendtv@xxxxxxxxxxxxx
- Date: Thu, 10 Feb 2011 08:31:09 -0500 (EST)
Two tuners can provide for space diversity reception.
Mark A. Aitken
Director of Advanced Technology
Sinclair Broadcast Group
(443) 677-4425 Mobile
(410) 568-1535 Desk
Connected by DROID on Verizon Wireless
-----Original message-----
From: Craig Birkmaier <craig@xxxxxxxxx>
To: opendtv@xxxxxxxxxxxxx
Sent: Thu, Feb 10, 2011 12:38:55 GMT+00:00
Subject: [opendtv] Re: Seeing Ghosts on a Single Frequency Network
At 1:44 PM -0500 2/9/11, Allen Le Roy Limberg wrote:
Also, a receiver with two front-end tuners may become commonplace in any
case. Such a receiver is better for channel surfing or for switching back
and forth between RF channels.
There are many advantages to a receiver with two front ends, but most
of them are based on the ability to receive DIFFERENT programs. DVRs
all have multiple tuners so that you can record one program while
watching another.
With multiple tuners you can do all kinds of bandwidth saving
techniques like the ones I noted in the paper I recently linked on
resolution independent coding. That is, you can turn the TV into the
"master control switcher" to do some of the following:
1. crossfades or fade-through-black between program streams (entropy
coders don't handles these transitions well).
2. Switching to different versions of commercials for different sub markets.
3. Live overlays of graphics, crawls and logo bugs with proper
positioning for any display.
4. DVR capabilities
I suppose you could add #5
Use both tuners to get solid reception of one program...
I've still not seen any compelling arguments for MFNs, or any
estimate of relative spectral efficiency when compared to SFNs using
less spectrum.
But I am very pleased to hear that Mark Aitken and others are looking
past current solutions to apply the best technology to the problem.
Regards
Craig
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- » [opendtv] Re: Seeing Ghosts on a Single Frequency Network - Mark Aitken
- » [opendtv] Re: Seeing Ghosts on a Single Frequency Network- John Shutt
- » [opendtv] Re: Seeing Ghosts on a Single Frequency Network- John Shutt
- » [opendtv] Re: Seeing Ghosts on a Single Frequency Network- Allen Le Roy Limberg
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- » [opendtv] Re: Seeing Ghosts on a Single Frequency Network- Allen Le Roy Limberg
- » [opendtv] Re: Seeing Ghosts on a Single Frequency Network- John Shutt
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