[opendtv] Re: Case for 720p60
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 19 Apr 2010 11:09:57 -0500
Craig Birkmaier wrote:
> What is lacking here is any discussion of the fact that most folks
> are still watching, and most stations are still broadcasting
> interlaced SDTV...
In ATSC-land, where there are no MPEG-2 MP at ML restrictions, in principle at
least, broadcasters could begin to transmit SDTV as 480p24 or 480p60. So why
don't they?
One of the NBC4 subchannels is Universal Sports, now using 480i. It probably
doesn't make sense to try using 480p24 for sports, so they would have to use
480p60. If it's true that MPEG-2 compression is so much more efficient in
progressive mode, are the advocates of progressive saying that the US
subchannel could be transmitted as 480p60 over the same ~2.5 Mb/s channel now
used for 480i?
Bert
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