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Nature of dual system TV's

Discussion in 'TVs' started by robk, Mar 22, 2001.

  1. robk

    robk
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    From what I gather when TV's switch to NTSC mode they play in the 525 line 60hz format.

    What happens on 100hz TV's?
    Do you get a 120hz option or is there simply one 60hz mode?
     
  2. Ludae

    Ludae
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    Most scan at 120Hz interlaced.
     
  3. robk

    robk
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    without wishing to court controversy, how does 120hz compare with 60hz?
     
  4. Jeff

    Jeff
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    I have never heard of 120Hz, I think that this is a wind up.
     
  5. Ludae

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    No wind up. I believe most 100Hz TVs switch to 120Hz when 525line 60Hz signals are detected.
     
  6. Ludae

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    120Hz requires that the input video is sampled into a digital field/frame memory. This is not necessarily a bad thing but it can be if poorly implemented which is often the case. Also, increasing the number of times an image is repeated increases motion blur.

    100Hz is used to eliminate the problems of 50Hz field flicker and 25Hz line flicker whereas 60Hz systems have much less flicker than 50Hz systems so inceasing 60Hz to 120 is not particularly important.

     

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