50/89
2. Configure
the
following
settings.
Audio
Encoding:
G.722.1,
G.711ulaw,
G.711alaw,
MP2L2
and
G.726
selectable.
Audio
Input:
When
an
intercom
is
connected
to
the
camera,
you
need
to
set
this
option
to
LineIn
.
When
a
microphone
is
connected
to
the
camera,
you
need
to
set
this
option
to
MicIn
.
Input
Volume:
Slid
the
bar
to
turn
up/down
the
volume.
The
value
ranges
from
0
to
100.
3. Click
to
save
the
settings.
5.4.3 Configuring ROI
Before
you
start:
ROI
(Region
of
Interest)
encoding
is
used
to
enhance
the
quality
of
images
which
are
specified
in
advance.
Stream
Type:
You
can
set
the
ROI
function
for
main
stream,
sub
stream
or
third
stream.
Select
a
stream
type
and
then
configure
the
ROI
settings.
●
Fixed
Region:
The
fixed
region
encoding
is
the
ROI
encoding
for
the
manually
configured
area.
And
you
can
choose
the
Image
Quality
Enhancing
level
for
ROI
encoding,
and
you
can
also
name
the
ROI
area.
Steps:
1. Select
a
Region
No.
.
2. Check
the
check
box
of
Enable
under
Fixed
Region
.
3. Click
and
draw
a
red
frame
in
the
live
view
image.
4. Adjust
the
ROI
level
from
1
to
6.
The
higher
the
value,
the
better
image
quality
in
the
red
frame.
5. Enter
a
Region
Name
and
click
Save
to
save
the
settings.
Figure
5
‐
25
Region
of
Interest
