Other Redcodes

[cinemano]

Hello..

does anyone think RED will introduce smaller and smaller compressions in future firmware builds? like 100 mb/sec on red drive?

 

[Alexis Hanawalt]

Do you mean less compression? It's already around 28Mb/sec

 

[Mark L. Pederson]

Do you mean less compression? It's already around 28Mb/sec

less compression = higher data rate

 

[Stephen Gentle]

Do you mean less compression? It's already around 28Mb/sec

Shouldn't that be 28MB/sec (Megabytes per second)? 28Mb/s (megabits per second) is only 3.5MB/s - a little more than DV.

 

[Robert Berger]

Redcode 28 MB = (8x28 MB) 224 Mb (twice as much as DVCpro 100)
Redcode 36 MB = (8x36 MB) 288 Mb (twice as much as HDcam)

Robert

 

[Jannard]

The internal limit of RED ONE is 36MB/sec. Just so you know.

Jim

 

[Robert Berger]

Clear,
at the moment i only use 28 and thats great and "easy" to handle.

thanks Robert

 

[Rocco Schult]

same experience here.
I could imagine, though I did not test yet, that bluescreen proftits from the higher data rate.
But colorcorrection is already veery nice with REDcode 28.

 

[cinemano]

assuming 4k uncompressed is about 1gig a second.. then redcode 36 being 288MB, thats pretty good, its a little over one fourth the amount of uncompressed, no?

 

[laguun]

Redcode 28 MB = (8x28 MB) 224 Mb (twice as much as DVCpro 100)
Redcode 36 MB = (8x36 MB) 288 Mb (twice as much as HDcam)

Robert

HDCAM also has 440 (SR), 880Mb (SR2) and uncompressed 4K (nonrealtime) datarates. Audiowise it adds 4 (20 bit uncompressed), 5.1 (HDCAM AC3) or 12 (24bit uncompressed SR) tracks. IIRC HDCAM itself goes up to 185 Mbit.

 

[Andrew M.]

4096x2304 = 9MB - 12 bit
9MBx60fps x 1.5 (8 to 12 bit conversion) = 810MB/sec (60fps maximum in the specs)

810MBx8 = 6.48Gbits/sec
even if we count 24fps and 4096x2048 it comes up to 2.304Gbits/sec
Can't squeeze in to Gigi need 10Gig fiber.

 

[Dominic Jones]

4096x2034 12-bit uncompressed RAW = 13.5MB per frame.

So at 24fps (which is much more commonly used than 50/60fps other than in sports) you have an uncompressed datarate of 324MB/s.

Meaning that RC36 has a compression ratio of around 9:1 (remembering that RC is a VBR compression, so it's impossible to come up with a hard figure).

Also remember that with compression, unless you're comparing like to like (e.g. RC28 to RC36), numbers are pretty much meaningless - how the compression works and how well it is implemented, plus the subject matter at hand in a lot of instances, is far more important...