[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.


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