🚀 go-pugleaf

kludge@grissom.larc.nasa.gov (Scott Dorsey) writes:
>
>Well, first of all an analogue signal doesn't really have an infinite number
>of divisions if it's represented as a voltage or a current, because they are
>both quantized.  You can't get any unit of charge less than an electron.  It's
>just that the number of divisions is extremely large.

If manufacturers can say their device with a adjustment potentiometer has
an infinite number of settings, so can I.  :-)

>
>In addition, the linearity of the encoding comes into play here.  With the 
>NTSC encoding scheme, not very many colors are possible.  But, the number of
>colors is going to be a function of the dynamic range of the system and is
>therefore dependant on the bandwidth you want to allocate.
>
>In a digital system, it's the same way.  If you allocate more bandwidth, you
>can get more of a color range, or you can get more resolution.  The nifty
>thing about digital systems is that it permits much easier allocation of
>bandwidth (even on the fly!), and although digital encoding generally uses
>more bandwidth than the theoretical minimum of an analogue system, because
>the baseband signal can be better packed into the available space, it can
>be more efficient.

I find it hard to believe that the above paragraph applies to the
future of HDTV.  I do not believe "they" would approve of a system that could
randomly change the bandwith or the resolution.  My question was more
of "Have they decided yet, and if so, what did they decide?"

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Christopher Wolf             Electrical Engineer                cmwolf@mtu.edu

                             Quote of the hour:
      Houghton, Michigan: Climate is what we expect, snow is what we get.
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"A dead telephone sanitizer?" "Best kind." "But what's he doing here?"
"Not a lot." 
                              - The Restaurant at the End of the Universe
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