[opendtv] Re: News: The Winds of Spectrum War
- From: Tom Barry <trbarry@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Fri, 30 Oct 2009 16:57:28 -0400
I got interested and answered my own question about current mobile dtv
stations. I found a list, including many now on the air at
<http://www.rabbitears.info/market.php?request=atscmph>
Anybody have any exposure to any of those? If so, how's it going?
- Tom
Tom Barry wrote:
> Craig Birkmaier wrote:
>
>> We are not talking about the ATSC mobile standard. We are talking
>> about a new DTV standard to replace ATSC and free up spectrum for
>> broadband.
>>
>> By the way, you could get AT LEAST five 480P channels into 19.3 Mbps,
>> even live sports, with h.264. Three to four Mbps per stream is more
>> than adequate
>>
>> Regards
>> Craig
>>
> Yes, 3 mbps data is probably enough. My comments were based upon the
> ATSC mobile payload after using 1/4 FEC (3/4 redundant). Then 3 mbps
> actual data would probably take 12-13 mbps of the stream if that was
> allowed. Mobile needs extra overhead for error correction but I don't
> know which standard you are talking about so I can't say how much.
>
> The 1/4 FEC seemed excessive overhead in mobile ATSC but even that
> standard allowed also for 1/2 FEC and I don't know yet which is getting
> used in practice, if any. Wasn't some station using it by now? I
> stopped following that as my life has been eventful in other ways recently.
>
> - Tom
>
>
>
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