[opendtv] Re: Digital radios outstrip analogue  At 3:23 PM -0500
3/2/05, Manfredi, Albert E wrote: >Craig Birkmaier wrote: >>
What I was trying to ask is why do we have multiple >>
infrastructures for broadcasting different services. >One size
doesn't fit all. For radio, more robust, less >spectral
efficiency affordable. For TV more spectral >efficiency
required, less robustness more easily >tolerated. (This is high
quality TV, not the cell phone  Yes Bert, we have already been
over this. You can satisfy all of  these requirements with a
single properly designed digital broadcast   Not only this, but
it is NOT correct to lump all video services  together. There is
a continuum from high quality video services that  require high
bit rates, with less robustness to lower bit rates with  more
robustness. Even the ATSC understands this, although 2VSB is
never likely to be used by broadcasters.  >The analog world
accommodated this as easily as the >digital world can. There is
a small sliver of spectrum >just abov