User guide

3-10
Digital Cinema Delivery Tool
The JPEG2000 compression type provides the following settings items:
When everything is set up correctly, you can go to the next configura-
tion step with the button NEXT.
ICT This setting enables the Irreversible Color Trans-
form, meaning an internal conversion of the imag-
es’ colors prior to encoding. With this the colors of
the images will be encoded more efficiently. If the
check box is deactivated, the original colors of the
images will be used for the encoding, which would
normally result in a larger file size per image, but
with one of the Limit the maximum bit rate/file
size… settings activated it will result in a lower
quality of the finalized material.
Maximum
quality VBR
With this setting activated the applied JPEG2000
encoding will get the maximum quality out of each
processed image. It can be specified further with
the settings sorted under it:
– Limit the maximum bit rate/file size to be
compliant to the DCI spec: This setting
enables the post compression rate control. It is
available for convenience purposes, already
providing the optimum settings for digital cin-
ema content. It cannot be altered.
– Limit the maximum bit rate/file size to: This
setting enables the post compression rate con-
trol. When it is activated, the limitation values
can be adjusted. Select whether you want to
adjust the bit rate or the file size from the
drop-down list and then change its value in the
entry field to the right to the desired one.
– No limit: This setting disables the post com-
pression rate control, meaning a JPEG2000
compression will still be performed but without
further bit rate/file size limitation, resulting in
the highest quality and the largest file sizes
(e.g. between 2 and 3 MB for 2K images).
Constant quality
VBR
The constant quality VBR setting operates near the
maximum quality VBR (when set to 100%). During
encoding it tries to get the same quality for the
complete timeline so that you will receive the same
impression for each image. It can be specified fur-
ther with the settings sorted under it, which oper-
ate the same way as for the maximum quality VBR
(see above).