[mythtv-users] Some notes on Google TV
anaerin at gmail.com
Wed Nov 17 00:16:57 UTC 2010
On 16/11/2010 5:25 AM, Mike Perkins wrote:
> Brad Templeton wrote:
>> But the hard reality is that transcoding loses quality and is
>> expensive, and as the satellite companies offer their DVRs for "free"
>> that's a path that will be less popular, in spite of the advantage it
>> confers in unified interface, and all the tools you get when you can
>> read the plaintext video stream.
> "...plaintext video stream." Now *there's* an interesting concept!
Given that it's how Sasktel's IPTV system currently works (Though they
are "Upgrading" to the MS MediaRoom implementation, which may enable
encryption), along with free.fr and some other IPTV implementations out
there, it's not nearly so outlandish as you might think.
With IPTV and Multicast, at least, the upstream provider can use routing
rules to effectively restrict the available channels on a per-user
basis, without having to re-broadcast unicast. This makes for the best
of both worlds, as far as bandwidth efficiency and stream security goes.
There is little need for per-channel encryption, as channels that users
have no access to simply do not arrive at their box. With Satellite or
Cable, all users receive all channels, and thus restrictable channels
must be encrypted to obfuscate them from users who are not authorised to
Unless, of course, you are mis-reading "Plaintext" as "ASCII", rather
than the cryptographic definition of "Plaintext" as the unencrypted
version of the "Cyphertext".
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