On Fri, 02 May 2008 09:54:23 -0500 Pete C. <aux3.DOH.4@[EMAIL PROTECTED]
> wrote:
|
| 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.
That only when/if they see a need to do it in digital or HD. When TV
tuners
no longer have analog capability, then there will be the pressure to at
least
do this for SD in digital.
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