Recording 109
ARRIRAW 1.5G DL
ARRIRAW is the name of raw data from ARRI cameras. Raw data is the
sensor image data before it is converted to RGB images. As ALEXA has a
single sensor with a Bayer pattern color filter array, this means that every
pixel only has information of one color channel.
With normal HD images, the missing color channel information is calculated
from the adjacent pixels in the camera.
For raw data, this calculation is delayed until after the recording to save
bandwidth and creative options, as many decisions on how to convert the
images can be made in post.
ALEXA ARRIRAW specs:
Bayer pattern color coding
12 bit log luminance coding
No white balance applied
No exposure index applied
Full sensor resolution (2880x1620)
ARRIRAW is transmitted to the recorder via the ARRIRAW T-Link by using a
standard HD-SDI dual link connection with a proprietary coding. An
ARRIRAW T-Link certified recorder must be used for recording. These are
available from a number of manufacturers like Codex, Keisuko Giken or
S.Two.
For more information, go to www.arri.de/arriraw
Note: Only use double shielded HD-SDI cables on all HD-SDI outputs to ensure error
free data transmission!
Triggering record on an external recorder
When "SxS recording" is set to Off, the REC button triggers only the SDI rec
flag. If the recorder understands this flag, it will automatically start to record.
Note: With the SDI rec flag, sucessfull recording cannot be guaranteed, as there is no
feedback from the recorder to the camera.
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