[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.

-Doug
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 256 bytes
Desc: OpenPGP digital signature
Url : http://mythtv.org/pipermail/mythtv-users/attachments/20041220/f9082800/signature.pgp


More information about the mythtv-users mailing list