[opendtv] Re: Kennard and Powell to the rescue
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 12 Jan 2009 17:05:45 -0500
Bob Miller wrote:
> Then as I understand it all legacy receivers could receive the
> signal but not take advantage of the better reception of M/H.
Actually, all legacy receivers receive, but simply ignore, the M/H
streams. Your confusion is probably caused by the misleading figures in
A/153.
Everything arrives in correctly formed MPEG-2 TS packets. Those with M/H
headers are ignored by legacy receivers. And the M/H MPEG-2 TS frames
are carefully spaced so as not to jiggle the legacy MPEG-2 TS frames too
far out of their expected time slots.
> If they allowed M/H with MPEG4 then they are breaking the
> rules and making all legacy receivers obsolete.
No. M/H does use what you call MPEG-4. As long as this doesn't break
legacy receivers, no problem.
Bert
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