structure.
Long
IBBP
GOPs
will
produce
higher
latency
over
short
IP
GOPs.
Short
IP
GOPs
at
lower
bit
rates
produce
lower
quality
video.
distribution
and
standard
contribution
transmissions.
Latency
is
approximately
1/2
second.
LOW:
Latency
is
approximately
3
frames
less
than
NORMAL.
4.12
Fault
Mode
The
user
can
select
encoder
behavior
during
video
loss.
The
encoder
can
stop
encoding,
encode
black,
or
generate
a
combination
of
Black,
Bars,
Tones
and
Service
ID.
OFF
BARS
BARSTONES
BARSOVERLAY
BARSTONESOVERLAY
4.13
Fault
Resolution
Allows
the
operator
to
select
what
resolution
to
encode
at
during
fault
mode.
480I59.94
576I50
720P59.94
720P50
1080I59.94
1080I50
4.14
Aspect
Ratio
Aspect
Ratio
is
the
ratio
of
horizontal
lines
to
vertical
lines
in
the
encoded
image.Options
are:
-
Wide
Screen
Signaling
(WSS)
reads
incoming
WSS
flag
and
adjusts
aspect
ratio
accordingly.
-
4
X
3
defaults
standard
definition
to
4
X
3
display.
-
16
X
9
defaults
standard
definition
to
16
X
9
display.
Aspect
Ratio
is
related
to
Active
Format
Descriptor
(AFD).
It
is
recommended
to
set
AFD
to
WSS
if
Aspect
Ratio
is
WSS.
4x3
16.9
WSS
*This
is
not
a
scaling
option.
Output
display
is
completely
dependent
on
input
signal
4.15
AFD
Active
Format
Descriptor
is
data
that
can
be
sent
in
a
MPEG
video
stream
that
provides
information
about
the
aspect
ratio
and
picture
characteristics
within
the
stream.
AFD
compatible
display
or
STB/IRD
is
required.
AFD
is
related
to
Aspect
Ratio.
Aspect
Ratio
defines
pixel
aspect
ratio
as
encoded.
AFD
is
used
by
downstream
decoding
devices
to
properly
display
pixel
aspect
ratio
on
displays
with
differing
aspect
ratios.
OFF
WSS
BOX16:9_T
BOX14:9_T
BOX16:9_C
AS_CODEDFRAME
4:3_C
16:9_C
14:9_C
4:3_SP_14:9_C
16:9_SP_14:9_C
16:9_SP_4:3_C
4.16
GOP
Type
GOP
Type
can
be
set
to
OPEN,
CLOSED,
or
AUTO.
OPEN
GOP
uses
referenced
pictures
Open
Closed
AUTO