[opendtv] Re: Time to give up on 1080i for football
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 7 Dec 2009 17:19:49 -0600
Craig Birkmaier wrote:
>> We all know that now HD CRTs are virtually gone, and that cameras
>> don't output 1080i, so the options of 720p or 1080p for transmission
>> are obvious ones.
>
> Excuse me?
>
> The vast majority of HD cameras in existence today output 1080i,
> unless they are specifically designed for 24P, or limited to 720P.
Oh, right, I should have said that HD cameras today don't HAVE to output
interlaced, and monitors virtually always would deinterlace if interlace were
transmitted. Whereas the first HD cameras, at least those produced by Sony,
output interlaced. That's how they could get them out there quickly.
>> I'm amazed at how much of a big deal was made of the one 1080i mode
>> in the HDTV standards, back then.
>
> And for good reason. Interlace has NO PLACE in a world where entropy
> encoding is used for emission. It made sense as a compression
> technique in an analog world, but causes more trouble than it is
> worth in the digital world.
You missed the point, and you continued to perpetuate the notion that something
IN THE STANDARD has to change to make the TV chain progressive.
I'll grant that you know better than me what the internal switchers do in TV
stations these days. However that is changing in due course, I suppose as
stations update their equipment, and nothing at all changed in the ATSC
standard (in this respect).
I scanned all of our TV stations a few months ago. As I recall, the only
stations left transmitting their HD stream as 1080i were the NBC O&O and the
CBS affiliate. That's it. No change was required to anything in the standard or
in receivers.
Bert
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