Did Squeeze On My Toshiba Hd Input,please Help.

Discussion in 'Archived Threads 2001-2004' started by David Chisholm, Dec 24, 2001.

  1. David Chisholm

    David Chisholm Auditioning

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    I own a TN61x81 and this TV does have separate settings for

    HD signals so I set my TV on a HD preview channel and entered the convergence grid and started setting up my squeeze. I now have a perfect 27.5X48.88 (1:1.78)centered grid on my TV. I have 17X13 lines. Now when I go back to look at the video I am seeing 31 inches of video and sync pulses running on top and bottom of my video. I was hoping someone could tell me what I did wrong and answer some questions for me.

    1. Could my problem be that I am seeing 0% overscan.

    2. If I am in the service menu with video showing and I

    start to change HIT,WID,HPOS,VPOS will I only move around

    the video without affecting the convergence grid.

    2. How do I change the video portion without affecting the

    convergence grid that I have built.

    3. Since my TV changes settings when receiving a HD signal

    hence the reason for doing the squeeze how do I set up

    my overscan.

    Thanks in advance,

    Dave
     
  2. Michael TLV

    Michael TLV THX Video Instructor/Calibrator

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    Michael Chen
    Greetings

    One of the things we do not have control over in the design menu of the set is something called vertical blanking. On the current sets, when HDTV mode is invoked, the blanking is set to cover up the video sync stuff you see at the top and bottom.

    You need to build yourself a few mattes if you do not want to see this stuff. A minor annoyance compared to what you gained.

    Setting up the 16:9 mode requires you to go between both convergence grid and real life to temper what you see. You settle on a compromise between the two. The measurements on the grid cannot be totally trusted ... hence take something inbetween. You did not do anything wrong per se ...

    >1. Could my problem be that I am seeing 0% overscan.

    Yup ... hence the mattes.

    2. If I am in the service menu with video showing and I

    start to change HIT,WID,HPOS,VPOS will I only move around

    the video without affecting the convergence grid.

    Nope ... will affect the grid as well. I hope you are weary of VPOS and have not touched it for fear of invoking the VPOS bug? Which is a very bad thing.

    2. How do I change the video portion without affecting the

    convergence grid that I have built.

    You cannot ... hence build mattes

    Regards
     
  3. David Chisholm

    David Chisholm Auditioning

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    Thanks for the reply Micheal. You know I did change VPOS in

    the service menu forgetting about the bug. My hex values

    where changing on the screen but I didn't see the image

    moving. I restored it to the original settings before exiting and

    checked everyone of my inputs they all seem to work fine.

    I guess I'm lucky. Since then I have been making my changes from the designer mode.

    So it looks like no matter what minor tweaking I do I'm stuck with those blanking pulses, to bad.

    Any chance that those blaming pulses could cause burn in

    on my screen. If not I'm off to make some matts.

    Thanks again,

    Dave.
     
  4. Michael TLV

    Michael TLV THX Video Instructor/Calibrator

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    Greetings

    A friendly reminder that long term use of the HD mode with the squeeze is bad for the tV ... it will cause burn in. Use only when you really want to watch HD ... do not casually leave the TV in HD mode ... it will burn ... even at low contrast settings.

    Build your mattes ... and be aware ...

    Regards
     

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