[opendtv] Re: 20050627 Mark's Monday Memo
- From: "Dale Kelly" <dalekelly@xxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 06 Jul 2005 15:17:18 -0700
Yes, that's as I recall it now that you've refreshed my memory.
The E8-VSB initiative from Zenith was seemingly not supported
by a large majority of CE manufacturers. I understand that the
language you quote was inserted to assure that it's value is limited.
Clearly it is not a substitute for the robust operational modes of
COFDM.
----- Original Message -----
From: "John Shutt" <shuttj@xxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Wednesday, July 06, 2005 2:50 PM
Subject: [opendtv] Re: 20050627 Mark's Monday Memo
> 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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