[opendtv] Re: First look at ATSC HD Broadcast
- From: <tjharvey@xxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>, <opendtv@xxxxxxxxxxxxx>
- Date: Thu, 9 Jun 2005 1:47:54 -0400
Yeah I see it too. Most MPEG2 encoders appear to default to shifting the
picture down one line so that the line 21 captions appear in active video. I
asked encoder manufacturers about this and was told that this became the
default before EIA708 DTV closed captioning standards so that legacy EIA608
could be read.
In the intervening 4 years or so after EIA708 and now that EIA708 is FCC
mandated, the 1 line dropped default video is still the case even though it is
not required!
We took the trouble on our DTV transmission to shift the picture up one line to
conceal the caption line. Many other broadcasters don't seem to bother.
Terry Harvey
>
> From: "John Willkie" <JohnWillkie@xxxxxxxxxx>
> Date: 2005/06/08 Wed PM 11:39:22 EDT
> To: <opendtv@xxxxxxxxxxxxx>
> Subject: [opendtv] Re: First look at ATSC HD Broadcast
>
> I just love seeing the digitized vbi data in dtv stream when I analyze DTV
> transports. Some people have no shame!
>
> John Willkie
> ----- Original Message -----
> From: <tjharvey@xxxxxxx>
> To: <opendtv@xxxxxxxxxxxxx>; <opendtv@xxxxxxxxxxxxx>
> Sent: Wednesday, June 08, 2005 7:28 PM
> Subject: [opendtv] Re: First look at ATSC HD Broadcast
>
>
> > I agree with John. However, good quality SD converts well and since most
> displays are not true HD, the results are very good.
> >
> > What I believe the gist of the complaint is the often poor NTSC stuff
> which is delivered via terrestrial DTV. I contend that broadcast quality is
> dropping. When NTSC delivery only was aavailable and before digital video
> manipulation devices became prevalent, analog parameters were clearly
> measured, monitored and corrected.
> >
> > Today, video has become 'easy' and unimportant: in a broadcast station it
> is common place to just plug the equipment together without a thought. Video
> is NTSC decoded and re-encoded again and again and concatenated digital
> compression is the order of the day.
> >
> > Take a Hollywood DVD and compare it with most off-air. The results are
> really most dramatic and it need not be so!
> >
> > Terry Harvey
> >
> >
> > >
> > > From: "John Shutt" <shuttj@xxxxxxxxx>
> > > Date: 2005/06/07 Tue PM 04:47:47 EDT
> > > To: <opendtv@xxxxxxxxxxxxx>
> > > Subject: [opendtv] Re: First look at ATSC HD Broadcast
> > >
> > > Dan,
> > >
> > > If you're watching PBS HD, be aware that 3 out of 4 programs on that
> service
> > > are Widescreen SD programs upconverted to 1080i.
> > >
> > > John
> > > WKAR-TV, MSU East Lansing
> > >
> > > ----- Original Message -----
> > > From: <dgrimes@xxxxxxxxxxxxxxxxx>
> > >
> > > > I'm a little disappointed. I just installed a PCI Tuner card and can
> > > > finally look at ATSC HD. But it does not look as good as the analog
> > > > picture I am receiving. Sure, there are more picture elements, but
> the
> > > > compression artifacts are nasty. My analog picture is so sharp and
> clear
> > > > compared to the HD material.
> > >
> > >
> > >
> > >
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> > >
> >
> >
> >
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>
>
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