Adtec EN-20, User Manual

Page: 17 / 49

- 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.
Output display
is completely
dependent on
input signal
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 for
cropping/letter boxing by
downstream devices. The
configuration can be set to OFF,
WSS for AFD ‘passthrough’ or
manually set.
OFF
WSS
2 - 11
*.ECMD# AFD
View AFD API
documentation
for further
details of
arguments
2-11
GOP Type GOP Type can be set to open or
closed. An OPEN GOP uses
referenced pictures from the
previous GOP at the current GOP
boundary. A CLOSED GOP starts
with an I Frame and subsequent B
Frames do not rely on I or P frames
from the previous GOP.
OPEN
CLOSED
*.ECMD# GOP
GOP Structure GOP Structure sets the format
Group-of-Pictures will use; the
order of interframes and the
various types of picture frames that
will be used.
IBBP
IBP
IP
I
*.ECMD# GOP
GOP Size GOP Size is the distance between
two full image frames (I-Frames) in
a GOP Structure.
1 - 30 *.ECMD# GOP
Audio Menu
The following diagram illustrates the structure and flow of the
​
Audio Menu
​
on the Adtec
EN-20 device:
Control Function Options API Command
Input Determines type of audio input
being received SDI
Analog *.ECMD# AIN
Mode The Audio Mode can be set to OFF *.ECMD# AMO