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SMPTE vs Full range?

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Duke Bishop
SMPTE vs Full range?
on Apr 22, 2010 at 8:43:36 pm

When capturing DL RGB material, there is an option to capture Full Range, or SMPTE range.

What are these settings for, and why do they not exist for single link captured material?

Lastly, does DPX material have any options for Full/SMPTE range? I can't seem to find any.


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Doug Beal
Re: SMPTE vs Full range?
on Apr 22, 2010 at 9:36:09 pm

SMPTE range is Typically 64-940 Full Range is 0-1023 for RGB content
when converting DPX (from Scratch) to quicktime, Mastering from FCP via Kona3, I usually use full range. I find the color rendition to be exceptionally close to what was seen in Scratch

SMPTE range and Full Range
also discussed here
http://forums.creativecow.net/thread/8/1064025

and here
http://reduser.net/forum/archive/index.php/t-5628.html


Doug Beal
Editor / Engineer
Rock Creative Images
Nashville TN


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gary adcock
Re: SMPTE vs Full range?
on Apr 23, 2010 at 1:18:18 pm

[Duke Bishop] "What are these settings for, and why do they not exist for single link captured material? "

a) There is not enough bandwidth on a single link channel to support RGB at more than 8 bit.

b) Most single link content is in Y'Cb'Cr' (YUV) so it does not fall under the SMPTE RGB spec.


Contrary to Duke's comment, I do not recommend using full range SMPTE for anything other than a frame based workflow, particularly when cutting with FCP, which has a tendency to truncate all video signals into SMPTE space.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows for the Digitally Inclined
Chicago, IL

http://blogs.creativecow.net/24640



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Duke Bishop
Re: SMPTE vs Full range?
on Apr 23, 2010 at 6:56:46 pm

"Contrary to Duke's comment, I do not recommend using full range SMPTE for anything other than a frame based workflow, particularly when cutting with FCP, which has a tendency to truncate all video signals into SMPTE space."

Full range SMPTE? I thought Full range & SMPTE were 2 different settings.


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gary adcock
Re: SMPTE vs Full range?
on Apr 23, 2010 at 7:46:13 pm

[Duke Bishop] "Full range SMPTE? I thought Full range & SMPTE were 2 different settings."


Thanks, What I was meaning to say was:

"I do not recommend using full range over the SMPTE version settings for anything other than frame based workflows, particularly when cutting with FCP, which has a tendency to truncate all video signals into SMPTE space"


gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows for the Digitally Inclined
Chicago, IL

http://blogs.creativecow.net/24640



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