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4:2:2 - 4:4:4 and conversions

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Scott Warren
4:2:2 - 4:4:4 and conversions
on Oct 8, 2008 at 4:06:41 pm

I've read and read about 4:2:2 and 4:4:4, but I am wondering if someone could lay it out for me. The info I've ready, mostly in textbooks, get quite wordy. I am not grasping onto the whole concept of the ratios and how to convert them.

Anyone out there able offer assistance? Thanks!


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Dave LaRonde
Re: 4:2:2 - 4:4:4 and conversions
on Oct 8, 2008 at 4:29:09 pm

[Scott Warren] "I've read and read about 4:2:2 and 4:4:4... I am not grasping onto the whole concept of the ratios and how to convert them. "

Long story short: you DON'T convert them. Color resolution is determined by the video codec you use at the time of recording. The only sort of conversion that can take place is conversion to LESS color resolution by transcoding to a different codec. You can never convert up, because the data simply isn't there.

Below is a link to a podcast that gives a good, non-technical explanation of color space. Watching it will be the best 15 minutes you spend this week:

http://macbreak.libsyn.com/index.php?post_id=70596


Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Scott Warren
Re: 4:2:2 - 4:4:4 and conversions
on Oct 8, 2008 at 4:39:14 pm

Mr. LaRonde,

Sound great! Thank you so much for replying and for the link. I can't wait to check it out. It is very much appreciated.

Scott Warren

"Live in the Beauty of your own reality."


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