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Colour space in PAL dvd
Hi,
I know this question has been answered in various forms but none seem to clearly define this area. I understand that if I’m taking a project out of avid it should be exported at 601 colour space as going to RGB would mean conversion and compression of colour space. is this correct? But in practice I find 601 lightens the colours and blacks begin to approach greys- the only way i can see around this is to try and compensate in colour corrections prior to export, but this seems very clunky and inaccurate. Is there a better way around that result?
What Im trying to solve is problems with the export image looking sort of soft when it is eventually put on tv (PAL), so I tried to use 601. I exported both 601 and RGB to PAL dvd still look a bit soft on the dvd (played back on a television) which may be a problem when its shown on a big screen. The TV maybe not be optimum but I assume that it should look as defined as the broadcast TV channels, but it doesn’t.
If someone could clear this up i would be indebted.
Tom.
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1 Reply
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Digital TV has blacks at 16RGB for black and 235RGB for white. If you color correct everything in Avid that way for broadcast you’re set. The issue is that some MPEG encoders (Compressor…), assume everything to be full range and then constrains to 16-235. If you are encoding in Sorenson Squeeze, there is a settings that you check telling it that levels are 16-235 and it will leave them alone.
So – if using Sorenson: export as 601/709 and check 16-235 range in the encoder.
If using compressor: export RGB.
Michael
Michael Phillips
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