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Thread: Are there any ATSC cards that convert HD to SD?

  1. #1
    Join Date
    Jul 2005
    Posts
    9

    Question Are there any ATSC cards that convert HD to SD?

    I currently use an external tuner to receive ATSC broadcasts (Hughes HTL-HD DirecTv receiver - this DirecTv receiver allows you to get ATSC/OTA reception without a Directv subscription! ). The tuner is then plugged into my PVR150 for capturing through GBPVR. If I set the tuner format to 480i, then all HD programs are downconverted to SD (which is what I need since I do all of my viewing with the MVP - and that's probably the only format that the pvr150 would record). I use a serial cable connection to change channels with a custom executable that I wrote.

    The whole system works great, but I'm wondering if there is a more efficient way to do this? I assume that what's happening is that the tuner is converting from digital to analog, and then the pvr is converting from analog back to digital. It seems like there should be a better way to do this. Are there any ATSC capture cards that will downconvert to SD? Or would you just have to use transcoding afterwords. Transcoding seems like more of a hassle than my present setup, though it would be nice to get rid of the rather large external tuner.

    Any thoughts?

  2. #2
    Join Date
    Jun 2006
    Location
    GTA, Canada
    Posts
    214
    I think transcoding is your only option. However, do you absolutely need the format to be SD?
    Server:
    Intel E2180@2GHZ| 4 GB RAM | PVR150 Retail | Vista Home Premium | GBPVR 1.3.7

  3. #3
    Join Date
    Jul 2005
    Posts
    9
    Quote Originally Posted by HTPCGB View Post
    I think transcoding is your only option. However, do you absolutely need the format to be SD?
    My understanding is that the MVP will only do SD. That's the primary reason, since all of my viewing is through the MVP. Recording size is another motivation, though not a show stopper. With my present setup I've found that I can lower the bitrate to around 2000 and the recordings still look great, but don't take up a lot of hd space.

  4. #4
    Join Date
    Jun 2006
    Location
    GTA, Canada
    Posts
    214
    Sorry, I missed the MVP part. With that in mind, I would probably stick with your current setup. Although you lose a bit of quality going from digital to analog and back again, it avoids the hassle of having to transcode everything you record.
    Server:
    Intel E2180@2GHZ| 4 GB RAM | PVR150 Retail | Vista Home Premium | GBPVR 1.3.7

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