Owner's Manual

conversion hardware. For example, some displays convert whatever they receive to
4:2:2
Y'CbCr
so they can
do
signal processing (usually because they're working
with
an off-the-shelf chip that can't handle anything else). So
if
you feed these displays
RGB your processing chain gets extra complex: 4:2:0->4:2:2->4:4:4->RGB->4:4:4-
>4:2:2->4:4:4->RGB. Since each conversion involves small degradations
to
the
picture, this
is
not
an optimal approach.
With
those displays, you're usually better
off
sending 4:2:2
and
letting the display
do
the processing
and
conversion.
And
that's just one issue; there are innumerable ways
that
either the player
or
the display
can make mistakes
or
degrade the signal in processing, making it impossible to
recommend a general approach.
Clearly it can be complicated to figure
out
which
one
produces the best picture,
but
we've
combined
the patterns most useful for evaluating color conversion
into
one
handy
"Color
Space
Evaluation"
pattern.
Doing
the full evaluation will take at
least
10-15 minutes
and
requires making some notes. For convenience, we've
put
a color space evaluation
forn1
on
the back
of
this booklet. For a larger version, you
can download a
PDF
from the Spears
&
Munsil web site (www.spearsandmunsil.
com).
Performing the tests
Start by setting the
output
on
the player to 4:2:2.
If
you haven't already done so,
run
through
the basic calibration steps for contrast, brightness, color, tint, sharpness,
and
color
temp
and
write down the numbers you arrived at
on
the form
under
the
"4:2:2"
heading. Then switch the
output
on
the player to 4:4:4
and
run
through
the calibration again.
You
may
not
need to adjust anything.
If
your player has RGB
mode,
do
the calibration again for
that
mode.
If
you have even more modes you
may
want
to use a separate piece
of
paper
or
print
out
a second form
and
write in
the
mode
name in place
of
one
of
the ones
on
the form.
If
there are differences in calibrated settings between the different modes, check to
see
if
the display
is
automatically remembering settings separately for each mode.
If
not,
if
the settings are only different by a
notch
or
two, it's probably
not
necessary
to change
them
during
the evaluation.
If
there are significant changes, especially in
12