Alan wrote:
>
> In article <tprSj.35586$Rk6.856@[EMAIL PROTECTED]
>
=?iso-8859-1?Q?in_Technicolor=AE?= <cinerama@[EMAIL PROTECTED]
> writes:
> >Does anyone know why we haven't seen the creation of a RF Modulator
similar
> >to the ones we've been using with our video games, cameras, etc.? You
know
> >the type I'm talking about? Inside one end you present a baseband
video
> >signal, and then, out the other, comes either Channel 3 or Channel 4
which
> >you can connect to the set with twin lead or coax with an F connector.
> >
> >It seems to me that it would be really great to have a product like
this
> >where one could introduce a component signal (RGB or YpRpB) or an
DVI/HDMI
> >signal and have a 1080i/720p signal coming out on 1 or 2 HDTV digital
> >channels. Is this product not being developed because of DRM concerns?
> >
> >Just curious.
>
> Because, as explained here several times in the past, it is far more
complicated
> than simply modulating a tiny AM transmitter with the baseband video
signal.
>
> You need to sample the signal, to store it in a frame buffer, process
that data
> into MPEG-2, generate PSIP data for it, assemble the whole mess into an
ATSC format
> data stream, modulate that with an 8vsb modulator which is somewhat more
complex
> than that analog AM transmitter was.
>
> Clearly, it can be done -- the TV stations do it. However, how many
thousands
> of dollars are you willing to fork over for it?
>
> Alan
I imagine at some point the folks that do the medium end stuff like
ChannelMaster might put such a product together to continue their market
segment in small motel TV and security camera channel insertion. A few
ASICs could make it pretty reasonably priced.
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