Re: Monitor calibration/profiling for video applications
Re: Monitor calibration/profiling for video applications
- Subject: Re: Monitor calibration/profiling for video applications
- From: Graeme Gill <email@hidden>
- Date: Fri, 17 Aug 2012 09:24:25 +1000
Dennis Dunbar wrote:
> From the research I did I read a fair amount about the Rec. 709 standard and saw that it seems
> really close to sRGB. I was surprised when the guy behind LightIllusion claimed it was a much
> higher standard than used in the stills industry. From there most of what he was saying seemed to
> rely on buzz words and claims of superiority while providing very little in the way of specifics.
Beware - Rec. 709 is an encoding standard, not a display standard. There is a deliberate
gamma difference between encoding and the typical CRT displays that are expected to be
used with Rec. 709 that compensates for expected viewing condition differences
(see Charles Poynton's "Digital Video and HDTV" for more background on that.)
So you never want to calibrate a display to Rec. 709, unless you make allowances
for the viewing conditions, typically by increasing the gamma of the display over Rec. 709.
[I would imagine that many people in the Video industry are woefully unaware of
the role that viewing conditions play in the standards they deal with.]
You might want to investigate ITU-R BT.1886 which is a display standard.
Graeme Gill.
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