[opendtv] Re: PAL
- From: "Dale Kelly" <dalekelly@xxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Thu, 14 Dec 2006 14:31:44 -0800
Bert Wrote:
> Maybe we're talking about the same thing, but I thought it was meant to
> solve the problem of colors shifting in receivers as a result of phase
> distortion in transmission?
That is correct, though the Phase shifts were also often caused by poor
equipment setup at stations. Over the years these problems were addressed in
a number of ways, such as by adding color reference to the video's vertical
blanking area but, better receiver color processing design was also a major
factor.
The PAL solution was clearly elegant design and was successful in solving a
significant problem but it did add other baggage to the signal. But, as I
said before, the significantly increased available transmission bandwidth
together with the 625 scan lines are the main factors in the systems better
picture quality.
Dale
> -----Original Message-----
> From: opendtv-bounce@xxxxxxxxxxxxx
> [mailto:opendtv-bounce@xxxxxxxxxxxxx]On Behalf Of Manfredi, Albert E
> Sent: Thursday, December 14, 2006 1:35 PM
> To: opendtv@xxxxxxxxxxxxx
> Subject: [opendtv] Re: PAL
>
>
> Al Limberg wrote:
>
> > The problem PAL was designed to overcome was the problems
> > with piping composite video over telephone lines.
>
> Maybe we're talking about the same thing, but I thought it was meant to
> solve the problem of colors shifting in receivers as a result of phase
> distortion in transmission? The striking difference between PAL and
> NTSC, to me, was always the much more natural colors, especially flesh
> tones, in PAL. I remember that over here, you had to readjust the color
> for every station, just about, in the late '60s. Whereas with PAL, there
> was no adjustment at all. No knob.
>
> Bert
>
>
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