OT: Composite/Component [was Re: [mythtv-users] Re: Image quality, what effects it?]

Cory Papenfuss papenfuss at juneau.me.vt.edu
Sun Aug 15 10:03:15 EDT 2004

 	Difference betwen the statement "not required to be encrypted" and 
"required not to be encrypted"... It looks like everyone is happy on QAM for 
the cable, but the "conditional access" could be granted in a number of 
different ways as I see it.  It could be in private MPEG streams in the 
unencrypted data channel (not likely).  It could be in the out-of-band channels 
(but then require a settop box).  The most likely one (I think) is the 
cablecard dooflopper that I've heard about.  Sounds like it's been agreed upon 
by lots of manufacturers.  That makes a single point of access necessary for 
decrypting the signals (private keys, etc).  Very much like directv.


* Cory Papenfuss							*
* Electrical Engineering Ph.D. Graduate Student                         *
* Virginia Polytechnic Institute and State University 			*

On Sat, 14 Aug 2004, Jay R. Ashworth wrote:

> On Sat, Aug 14, 2004 at 10:13:28AM -0400, Cory Papenfuss wrote:
>> I suspect that terrestrial cable will use encrypted QAM with cablecard
>> anyway, so getting uncrypted QAM support is probably moot.
> I don't know, actually.  SCTE 40 actually seems to suggest that the
> non-premium channels are *not* required to be encrypted, but I guess
> we'll have to operate and find out.
> Cheers,
> -- jra
> --
> Jay R. Ashworth                                                jra at baylink.com
> Designer                          Baylink                             RFC 2100
> Ashworth & Associates        The Things I Think                        '87 e24
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> 	"You know: I'm a fan of photosynthesis as much as the next guy,
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