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JVC GY-HD Series Camera Systems
GY-HD 100 & 200 series ProHD HDV camcorders & decks.


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Old March 3rd, 2006, 02:46 AM   #1
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Knee

What does the knee mean? 100 vs 108 percent? What do these each mean? What about these numbers in terms of white clip, I don't really get it...
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Old March 3rd, 2006, 09:39 PM   #2
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Bruce,

Maybe going to http://www.24pdigitalcinema.com/cinegamma.pdf will help you. It is a little bit technical, but after some serious reading (no "honey please" interruptions), you will get a much better grasp on the subject.

Hope this helps,

Luis Otero
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Old March 4th, 2006, 05:38 AM   #3
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Can someone tell me simply/ in laymans terms what setting the knee to 100% vs. 108% will do?
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Old March 4th, 2006, 06:16 AM   #4
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Quote:
Originally Posted by Bruce Meyers
Can someone tell me simply/ in laymans terms what setting the knee to 100% vs. 108% will do?
This is setting the clipping level rather than the knee.

100% is peak white, which is max video level that a transmission system is meant to carry. They have a clip which cuts off any signal that goes above that, although 102% seems to go through OK. Video cameras have a clip built in and the level of this can be set by the user.

By using a clip of 108% you're carrying a bit more highlight information into post production where the colourist can make a considered decision on the best way to use it. However, they'll have to ensure they produce a broadcast standard video output that won't cause difficulties in the transmission chain.

The 108% is useful if you're planning a film out.
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Old March 4th, 2006, 06:26 AM   #5
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Thank you

Thank you cery mcuh
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