Does this answer the compression algorithm question?:
“An Uncompressed RAW signal is the direct electrical value feed from the photosites of the camera sensor without any processing or manipulation. Think of it as the “digital negative” from the camera”
-Abel Cine Tech blog.
Lots of folks can do an ARRIraw debayer: Baselight
Codex, Nucoda etc. But right now, very few have implemented ARRI’s own SDK to do it; it’s not released generally at time of writing.
Christy MacKarell
Deluxe NY