Source video at sRGB levels can have illegal luminance levels?

[John Rofrano]

[Jim Lillis] “Isn’t 16 = to 7.5 IRE ?”

Yes and No. 7.5 IRE is an analog setting and 16 is a digital setting. 16 can equal 7.5 IRE or it might not equal 7.5 IRE because 7.5 IRE has to do with how the analog equipment will interpret the signal which the digital equipment has no knowledge of. Some NLE’s may try and emulate what 7.5 IRE looks like but the digital setting is still 16.

Read Glenn Chan’s excellent article “The 7.5 IRE Setup Problem” for more information.

~jr

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