[Tig] Gamut levels & 2k clipping

[Michael Bittle]

Rick,

Well, in the best of all worlds, the QC report would give you the  
rejected values relative to the expected standard.  There is a lot of  
variation out there, and sometimes is like pulling teeth to get a  
documented spec from the client or their client or the distributor  
or.........anyone.

Which is a long way of saying, in HD there is no universal standard.   
Go back to the QC house and ask what standard they are inspecting to.   
Then check with your client to make sure that that's the spec they  
think they're delivering to (and if they don't agree, don't "fix"  
anything until it all gets sorted out).

HD is fun!

Cheers,
Mike

Michael L. Bittle
Vice President Technical Operations and Quality
PostWorks, New York
100 Avenue of the Americas, 10th Floor
New York, NY 10013
212.894.4000 vox, 212-894-4099 fax
www.pwny.com



On May 7, 2008, at 5:09 PM, pags wrote:

> 1850 subscribers as of May 2008
> Bob Campbell supports the TIG
> http://colorist.org/wiki3/
> ====
>
>
>
>
>   Hey,
>
>     I been having some issues when my HD projects get qc'd. Tape to  
> tape 1080i, using Sony HD decks. I am using a DaVinci 2k and my  
> internal clips are set at the levels and settings are as indicated  
> in the Clipping window.
>
>     RED     GREEN   BLUE         MODE: CLIPPERS
> HW   0.92     0.92   0.92    CLIP MODE: LEGAL LIMITS
> SW   0.01     0.01   0.01
> SB   0.01     0.01   0.01
> HB   0.06     0.06   0.06
>
>   The issues seem to be in the RGB Gamut and Luma Gamut areas, i.e.
>
>  RGB GAMUT            LUMA GAMUT
>
> Upper B +799mv        Upper    +108 IRE
> Lower B -143mv        Lower R  -90mv
> Upper R +842mv        Upper R  +852mv
>
>
>  Here's my question. Where do my Clip settings need to be in order  
> for my Gamut levels to pass qc?  When I look at the scopes,  
> everything seems to look okay.
>
> Thanks,
>  Rick
>
>
>
>
>       
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