[opendtv] Re: News: CEA FORECASTS CONSUMER ELECTRONICS REVENUE WILL SURPASS $155 BILLION IN 2007
- From: "Dale Kelly" <dalekelly@xxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Thu, 11 Jan 2007 12:03:31 -0800
Your analysis is spot on IMO. I easily see the difference on my 50" DLP set
between HDTV* and PAL CDs played from my multi format DVD player (using
component output) on my 50" DLP set.
And, as you mention, the PAL DVD, like NTSC, has more available bandwidth
than does the analog broadcast versions.
*= Clearly all programs presented as HDTV, at least on DirecTV, are not of
HDTV quality and are sometimes from digital SD wide screen sources.
> -----Original Message-----
> From: opendtv-bounce@xxxxxxxxxxxxx
> [mailto:opendtv-bounce@xxxxxxxxxxxxx]On Behalf Of Manfredi, Albert E
> Sent: Thursday, January 11, 2007 11:33 AM
> To: opendtv@xxxxxxxxxxxxx
> Subject: [opendtv] Re: News: CEA FORECASTS CONSUMER ELECTRONICS REVENUE
> WILL SURPASS $155 BILLION IN 2007
>
>
> Dale Kelly wrote:
>
> > Thanks. To summarize our NTSC/PAL discussion:
> >
> > There is little qualitative difference between the
> > NTSC and PAL color transmission systems; the perceived
> > differences are simply related to implementation
> > rather than to system capabilities. I.E;
> >
> > If, in the U.S., the power line frequency was 50Hz
> > rather than 60 Hz, the channel bandwidth was 8 MHz
> > rather than 6 MHz and the TV set manufacturers
> > actually passed all color information contained in
> > the NTSC transmission, there would be very little
> > difference between the image quality of the two
> > systems.
> >
> > Conversely, if England began broadcasting NTSC
> > tomorrow, assuming TV set design was correct, there
> > would again very little difference in displayed image
> > - assuming post 1970 receiver design is used.
> > Question, how long has it been since you NTSC users
> > adjusted a hue control (which is now buried in a
> > menu)?
>
> The other topic was a comparison between PAL, specifically the UK
> variety, and HDTV. The assertion being that there wasn't much
> difference.
>
> When all else fails, use math. The UK version of PAL, PAL-I, supports a
> video bandwidth 5.5 MHz. The best PAL out there, PAL-D, supports 6.0 MHz
> video bandwidth. Both of these are close to what NTSC can do with DVDs,
> using the baseband video outputs. So that is (should be) what they are
> most comparable to.
>
> Other versions of PAL are 5.0 MHz or 4.2 MHz, the latter identical to
> NTSC in a 6 MHz channel.
>
> But HDTV is considerably sharper than any of these. Whether or not
> actual receivers can make complete use of what's available, HDTV video
> bandwidths are out in the 20-30 MHz region.
>
> 1080 at 60i or 1080 at 30p is 960 cycles/line * 1080 lines/frame * 30
> frames/sec = 31.1 MHz.
>
> 720 at 60p is 640 cycles/line * 720 lines/frame * 60 frames/sec = 27.6
> MHz.
>
> I submit, a major difference between any analog scheme and HDTV.
>
> Bert
>
>
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