[mythtv] [mythtv-commits] Ticket #3326: Implement multiple recordings per transport

[Carl Fongheiser]

On Jan 16, 2008 7:17 AM, Stuart Morgan <stuart at tase.co.uk> wrote:

> On Wednesday 16 January 2008 13:10:45 Stuart Morgan wrote:
> > Not sure about support for North American cable, since I don't know what
> > standard that uses, direct mpeg2 streams? (QAM is the wire transmission
> > standard not the data format and should not be likened direct to
> DVB/ATSC
> > which also both use QAM).
>
> Sorry, ATSC uses a different modulation - 8VSB, before anyone points out
> the
> error.
>
> I've seen some suggestions that NA Cable uses ATSC but I can't find any
> verifiable sources to back this up.
>

NA cable does indeed use ATSC, with the exception of the modulation scheme.
Most cable systems use 64-QAM or 256-QAM modulation, or some combination. A
few very old systems might use 16VSB.

Carl Fongheiser
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