[opendtv] Re: E-petition on HD spectrum is rebuffed
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Thu, 1 Mar 2007 12:43:37 -0500
At 11:23 AM -0500 3/1/07, Manfredi, Albert E wrote:
Craig Birkmaier wrote:
They can maintain the current SDTV service and add multiple
HDTV channels when they can utilize the spectrum they
already have at maximum efficiency.
Not really.
The existing 4 or 5 MPEG-2 SD streams require 14 to 15 Mb/s. Even at
64-QAM, that leaves less than 10 Mb/s in each multiplex for HD streams.
I think the best bet, to get HD on Freeview with no more spectrum, is to
transition to 64-QAM and all AVC compression, and to all receivers being
HD-stream-compatible. This avoids having to simulcast.
Agreed. This is want I was inferring in my post.
Regardsd
Craig
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