RED compression

[Dodi Dukat]

Hey guys,

Im writing a paper on digital cinematography (Epic & Alexa). Do you have any specific information on the wavelet compression with the RED One? And is there a difference between the RED Codes of the RED One and the Epic?

Thx alot!
dodi

 

[Patrick Wynne]

Hey Dodi,

I'd recommend you look at the support portion of the Red website. You can download the individual manuals for the Red One and Epic there. The manuals should be able to answer some questions based on Redcode and it'll also give you a solid source to cite for your paper. The big difference in terms of compression between the Red One and the Epic (to the best of my knowledge) is the amount of choices between the two. Epics allow for much less compression than the Red One.

I'm not a codec or compression expert, but the big thing I've always understood about Redcode is that it's a near lossless codec. The only real artifact I've ever really recalled hearing about is a "softening" of the image at higher compression.

As I've stated though, I'm not an expert. Best bet is to look on the main site some more and read the manuals.

 

[Gunleik Groven]

You'll see some differences here...

http://www.gunleik.com/tests/alexmx/RED1_MX_and_Arri_Alexa/Resolution.html

Not at all relevant for EPIC, BTW.

the Epic is in another league alltogether.

 

[Ketch Rossi]

My only request is that you do proper home work, and only publish information that comes form reliable sources, I really dislike misinforming papers, especially those that compare Alexa to Epic,
which is like comparing a Melon to a Water Melon...

Best of luck on your paper.

 

[Gunleik Groven]

Well Ketch, it's not THAT hard... after all...

The hard part is not the testing but to be open about your premises.

What is important to you and your productions will define how you test and how you conclude.

Also it is important to do repeatable tests under similar conditions

And give out the resulting material so that others can re-check your results.

If you OTOH just put out conclusions, you're off either way.

One way is open and scientific.

the other is flawed.

But anyone ever involved in any kind of research will know the difference.

It's all about methodology, re-checkability, and premises for the test

If you are open about those, the paper cannot get all flawed...

Main point is openness and make it re-doable to get the same results and have a good argument for why you think one result is better than the other. In many cases different premises will give different results.

Flawed premises will allmost allways give flawed results, and when they don't - the reasults are still irrelevant...



Cheers and best of luck!

 

[Mathieu Ghekiere]

I'm guessing that if you want to have absolutely the correct information, contact Graeme. He's at the top of the insides of REDCODE.
You'll be sure to not get wrong information there, I would guess.