Adtec digital EN-91 / EN-91P (version 1.02.29) Manual - Manual (Page 21)

Latency It is dependent upon the video rate,
frame size/rate (NTSC,PAL,HIGH-
DEF) and GOP structure. Long
IBBP GOPs will produce higher
latency over short IP GOPs. Short
IP GOPs at lower bit rates produce
lower quality video.
LONG: Latency will measure close to
1 second.
NORMAL: Should be used for
distribution and standard
contribution transmissions. Latency
is approximately 1/2 second.
LOW: Latency is approximately 3
frames less than NORMAL.
VERYLOW: Latency is approximately
5 frames less than NORMAL.
3FRAME/2FRAME/1FRAME
Feature keyed option that provides
super low end-to-end latency when
paired with an RD-60/RD-70. GOP
settings are ignored.
Interoperability with other vendor
decoders is not guaranteed in these
modes.
Latency Trim Use this setting in conjunction with
the Latency setting to fine tune the
latency in order to match various
manufacturers latency settings.
The setting is rounded down and
applied in video frame multiples (a
+50 mSec offset would result in
the following.. one additional
frame delay with 29.97 frame
material and two additional frame
delays with 59.94 frame material).
Max range is -400 to +200 and is
constrained based on the
ENCODELATENCY" setting (NORMAL)
and current video mode.
Fault Mode The user can select encoder
behavior video loss. The encoder
can stop encoding, encode black,
or generate a combination of Black,
Bars, Tones and Service ID.
*** Fault mode does not function
properly when the video source is
1080p24. The encoder will stop and
internal video source "WILL NOT" be
encoded!
OFF
BARS
BARSTONES
BARSOVERLAY
BARSTONESOVERLAY
Fault
Resolution
Allows the operator to select what
resolution to encode at during fault
mode.
480I59.94
576I50
720P59.94
720P50
1080I59.94
1080I5
1080P 59.94
1080P 50
Aspect Ratio Aspect Ratio is the ratio of 4x3