<p>So studio levels is the name used when rgb is mapped to values 16-235... and full range is 0-255.</p>
<p>Sorry but that isnt something i have had to deal with... yet.</p>
<p>I am still on 195 series i think and only have one monitor driven via dvi/hdmi at the moment. I dont even know if the monitor could handle yuv.</p>
<p>R<br><br><br></p>
<p>Please excuse brevity and pistakes, this email was sent from my Android smart phone.</p>
<p>Thanks and best regards,</p>
<p>Richard Morton</p>
<div class="gmail_quote">On 21 Nov 2010 15:19, "Paul Gardiner" <<a href="mailto:lists@glidos.net">lists@glidos.net</a>> wrote:<br type="attribution">> On 21/11/2010 13:59, Dan Christensen wrote:<br>>> Can someone summarize the issues here regarding studio levels? Maybe<br>
>> someone can create a FAQ for myth about this?<br>>><br>>> - What are studio levels?<br>> <br>> When YUV is converted to RGB, you get values from 0 to 255 for each gun.<br>> But not all the values are used. 16 is actually the blackest black, and<br>
> 235 is the brightest white. Any values below 16 are called blacker than<br>> black, and I presume they are supposed to be clipped. Values above 235<br>> might be clipped, or might be shown brighter than 235 if the display<br>
> has head room.<br>> <br>> Most computers monitors interpret 0 as black and 255 as white, so most<br>> PCs expand the range 16-235 onto 0 to 255. If you drive a TV via HDMI<br>> like that you'll get too much contrast and you'll lose some of the<br>
> darkest and lightest greys.<br>> <br>>> - Where are the settings for nvidia and myth? What are the defaults?<br>> <br>> I don't know about the nvidia settings, but in myth, when using vdpau,<br>> you can add the filter vdpaustudio in the render setup to make the<br>
> values 16-235 be mapped through unchanged.<br>> <br>>> - What do most TVs do?<br>> <br>> I believe most TVs expect studio levels on HDMI and full range on VGA.<br>> <br>>> - How does this relate to YUV?<br>
> <br>> You don't have to worry about it for YUV.<br>> <br>> Paul.<br>> _______________________________________________<br>> mythtv-users mailing list<br>> <a href="mailto:mythtv-users@mythtv.org">mythtv-users@mythtv.org</a><br>
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