[opendtv] Re: 20050627 Mark's Monday Memo
- From: "John Shutt" <shuttj@xxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 6 Jul 2005 17:50:54 -0400
If the FCC adopts ATSC A/53C in it's entirety as law, as they have with
A/53B, then yes, it can be enforced. Or at least amendment 1 paragraph
5.6.1 can be enforced:
"Limits have been defined for the maximum bitrate in the Enhanced (E-VSB)
service.
"At all times, the quality of video in the main stream shall be equal to or
better than the equivalent program in the Enhanced stream. In the event that
the programming is different in the main and Enhanced streams, a higher
resolution format is deemed to be higher quality.
"Additionally, during premium programming times, the maximum bitrate in the
enhanced (EVSB) stream shall be 3 Mbps out of the total 19.4 Mbps channel
capacity."
----- Original Message -----
From: "Dale Kelly" <dalekelly@xxxxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
> I seem to recall that the E8-VSB improvement is not
> backward compatible, (though it will not harm normal
> EVSB DTV reception in older receiver) and it was
> approved by ATSC to be used as a "fall back" audio
> service*. I believe that only Zenith's newest 5G product
> supports this service. Am I wrong?
>
> An advantage of COFDM is that the more robust
> modes are compatible in *all* receivers.
>
> *Note: I doubt that this is restriction enforceable.
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