LCD and Computer RGB vs. Studio RGB

Streamworks Audio wrote on 8/31/2009, 12:52 PM

OK so we all know that videos encoded for DVD (MPEG2) or Blu Ray (AVC,MPEG2,VC-1) are encoded with a source that is within the Studio RGB space (16-235). And we also know that computer monitors display it's contents with Computer RGB (0-255). So obviously computer LCD monitors are capable of displaying such values, but what I cannot find information on is if LCD TVs (if any) support such luminance. I have a Sony S series TV with the Bravia Engine 2 - but nowhere in the manual or web site does it say if it can use 0-255.

I am curious as my PS3 has the option to display 0-255 or 16-235, depending on how I set it. So am thinking of setting it to Full (0-255) and playing a Plunge video encoded with Windows Media (as AVC or MPEG2 clip values below 16 and the plunge screen as one bar below that). Then setting my TVs brightness with this video (adjusting till I cannot see a difference between 16 and the one bar below that.

Any ideas if LCD TV are supporting Full RGB?

Cheers,
Chris

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Comments

Grazie wrote on 9/28/2009, 5:12 AM

Lou, where is this advise: "In this specific case I get the best results by following SCS's advise to use the "Computer RGB to Studio RGB" FX." What is the advise targetted at?

Grazie

farss wrote on 9/28/2009, 5:26 AM

The advise he is following relates to video that is in "Computer RGB". The problem with following SCS's advise is that his video is NOT Computer RGB! In the case of his video the blacks are at 16 and the whites are at 255. If you apply the ComputerRGB to StudioRGB then the blacks become around 28 (WRONG) and the whites 235 (correct).

What you want is curve that leaves the blacks where they are and maps the superwhites from 255 to 235. I believe Glenn's project file includes a custom Color Curve that does exactly that.

This issue is somewhat compunded by the use of LCD monitors that can crush the blacks. I've been caught out by this more than once. They just do not display the dark greys, everything at the bottom ends up looking black, it's hard to see that you're lifting/ washing out the blacks or crushing them.

Bob.

Lou van Wijhe wrote on 9/28/2009, 5:46 AM

Thanks for your clarification, Bob. I'll do some experiments with these curve settings and see what it looks like.

Lou