[mythtv-users] PVR250 or HD3000?

Doug Larrick doug at ties.org
Mon Dec 20 21:06:19 UTC 2004

Michael J. Lynch wrote:
> Preston Crow wrote:
>> On Mon, 2004-12-20 at 14:56, Michael J. Lynch wrote:
>>> Other than cost, is there any reason to choose a PVR250 over a pchdtv
>>> hd3000 since the latter can MPEG2 encode both NTSC and ATSC?
>> You need to go back and do some more research, as the HD-3000 doesn't
>> MPEG encode anything.  (ATSC is broadcast as MPEG, so no encoding is
>> required by the recipient.)  Most HD-3000 users also use a PVR-250 card
>> for NTSC.
>> Check the list archives.
> That's not what the pcHDTV website says.  It specifically states that 
> the card
> MPEG2 encoding.  See the second line of paragraph 2 of the following link:
> HD-3000 at pcHDTV <http://www.pchdtv.com/hd_3000.html>
> The line I'm referencing is:
> "The card receives NTSC and ATSC Signals and converts them to
> digital streams which are transported across the PCI bus."
> I know that ATSC is already MPEG2, does this possibly mean that
> NTSC is converted to some digital format that is something other
> than MPEG2?

Yup!  Digital != MPEG2.  It's raw YUV data, not compressed.

I can attest that neither the HD-2000 nor the HD-3000 contains MPEG 
compression hardware.  For NTSC, they are simply dumb frame grabber cards.

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