[opendtv] Re: News: CEA FORECASTS CONSUMER ELECTRONICS REVENUE
- From: "Albert Manfredi" <bert22306@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Sun, 14 Jan 2007 14:45:57 -0500
Craig Birkmaier wrote:
So, did you do the same test with 4.2 MHz in NTSC?
Certainly. With proper NTSC equipment calibration you should see
undistorted content all the way out to 4.2 MHz, then a nice
smooth roll-off down to about 8 MHz.
And with properly designed and calibrated HDTV equipment, you can achieve
much better than that.
But since you persist, let's get back to Olivier's point.
If you look at the video bandwidth in a typical NTSC set receiving a typical
NTSC signal, what is the rollloff you will notice? Is it something under 4
MHz, probably?
Let's say it is. Let's say "there is not much information above 3.8 MHz."
Now you do a similar test of HDTV, and you see (your words) "not much
information above 20 MHz."
So Craig, is 20 MHz better or worse than 3.8 MHz?
And in the UK PAL system, the equivalent "typical" max bandwidth is probably
what? Less than 5 MHz? Same question.
Bert
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