FS700 + O7Q 240fps impressions

[nyvz]

Please be aware of the following calculation - its only based IMO (please correct me if I'm totaly wrong)!


FS700 takes the Output with a rate of a 2.12:1 compression:


2K (2048x1080)*12bit = 3.317 MB/frame (needed)
4K (4096x2160)*12bit = 13.271 MB/frame (needed)


3G SDI gives us about 3000MBit/s (makes sense).
Because the 24fps 2K recording shows the same wavelet-compressed image as the 240fps it uses the same compressionrate (I think also on the 4K RAW @60fps), so if we take:


2K (2048x1080)*12bit@240fps = 1.562 MB/frame (compressed framerate possible with 3G SDI @240fps)
4K (4096x1080)*12bit@60fps = 6.25 MB/frame (also compressed)


3.317 / 1.562 = 2.12336
13.271 / 6.25 = 2.12336


So we get the compression rate 2.12:1 (even if we "unpack" the signal later to a "uncompressed" DNG ;-) Its amazing how fast the O7q must be able to handle the huge amount of data in realtime! NOTE: You see the wavelet-compression already "before" the 3G SDI Output on the onboard LCD (specially on high-contrast-areas).

I think you math is missing a step, are you saying that is the compression ratio because that is the maximum 3G-SDI allows? I guess the idea is that 2.12:1 is the smallest compression ratio possible, right? It could easily be more than that and probably is if you ever see compression artifacts.