Help: Toshiba TN50X81 and Motorola DCT5100

Discussion in 'Displays' started by Steve_D, Oct 31, 2003.

  1. Steve_D

    Steve_D Second Unit

    Joined:
    Nov 28, 1999
    Messages:
    299
    Likes Received:
    0
    Trophy Points:
    0
    I finally got HDTV from my cable provider (they just started offering it, despite the fact that I was "HDTV ready" about 3 years ago), and am ecstatic about the picture and sound quality. However, I have a question about video outputs of the cable box.

    When I set the output to 1080i, my TV stretches and distorts the picture to 4:3, and has some problems with centering of the image on some channels. When I set the output to 480p, everything is DVD like in 16:9 which is a vast improvement over regular cable and I'm happy with it, but I can't understand why the TV or box or combination won't show 1080i in 16:9? I don't think my TV does the squeeze trick properly without ISF calibration...but shouldn't I at least get an actual resolution of 810i or something like that, shown in the correct aspect ratio, using the 1080i output?
     
  2. Michael TLV

    Michael TLV THX Video Instructor/Calibrator

    Joined:
    Mar 16, 2000
    Messages:
    2,909
    Likes Received:
    1
    Trophy Points:
    0
    Location:
    Calgary, Alberta
    Real Name:
    Michael Chen
    Greetings

    YOur TV does 1080i in a 4:3 space. There is no 810i mode. That was introduced the next year.

    The only way to fix this is to do the 16:9 squeeze tweak for Toshiba sets ... see the keohihdtv site for how to do it ... takes 4 to 5 hours. A calibrator can do this for you but it will cost a lot of money given the time needed. Best to do it yourself.

    Other solution is to buy Toshiba convertor box ($150 ) that converts 1080i to 810i ... but this introduces lots of downconversion artifacts. I don't think the boxes are available any more.

    Some cable boxes will output a 810i signal with bars ... have to read instructions.

    Regards
     
  3. Steve_D

    Steve_D Second Unit

    Joined:
    Nov 28, 1999
    Messages:
    299
    Likes Received:
    0
    Trophy Points:
    0
    Thanks Michael.

    Sounds like a DIY project, or time to buy a new set and sue Tosh for claiming "HDTV-ready"...lol
     
  4. Michael TLV

    Michael TLV THX Video Instructor/Calibrator

    Joined:
    Mar 16, 2000
    Messages:
    2,909
    Likes Received:
    1
    Trophy Points:
    0
    Location:
    Calgary, Alberta
    Real Name:
    Michael Chen
    Greetings

    You cannot sue them for that as it does deliver all 1080i of the signal. No wait, this is america ... you can sue anyone for anything ... winning is another matter.

    The set was designed at a time when they thought that all HD boxes would have 810i downconversion. It was one approach or the other ... neither was wrong, but one approach was less expensive.

    So DIY ... it is not that hard. I've walked many enthusiasts through the process myself.

    Regards
     
  5. Steve_D

    Steve_D Second Unit

    Joined:
    Nov 28, 1999
    Messages:
    299
    Likes Received:
    0
    Trophy Points:
    0
    just kidding about the sue part...that is why I lol'd, although clearly my set is not HDTV ready when that was the primary reason I paid double the going rate of non HD RPTV's for it.

    that aside, I very much appreciate your help.
     

Share This Page