User guide

12.5 ARRIRAW
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