VISTEK V6333E/D & V6333Q/D
hd/sd sdi digital audio multiplexer
HU-V6333E/D&Q/D
15
3.7
Engineering Menu
3.7.1
Audio Group Enables
Each group half can individually be turn off, or muted. If both halves of the group are turned off then the
group will not be embedded at all, otherwise silence is embedded into the off channel.
En Grp1.1
Control for the first half of group 1
G1.1 On
Turn the first half On
G1.1 Off
Turn the first half Off
G1.1 Mute
Mute the first half
En Grp1.2
Control for the first half of group 2
Etc …
3.7.2
Audio Group Resolution
When embedding audio onto HD SDI the resolution of the audio is always 24 bits. SD on the other hand
uses extended data packets to increase the resolution of the embedded audio from 20 bits to 24 bits. By
default the resolution of the audio embedded onto SD SDI is 20 bits, but it can be changed here to be 24
bits. The control therefore has no effect when the input is HD.
Grp1 Res.
Control for Group 1’s audio resolution
Grp1 20b
limit the embedding of audio onto SD to 20 bits
Grp1 24b
Let the embedding of audio onto SD be 24 bits
Grp2 Res.
Control for Group 2’s audio resolution
Etc …
3.7.3
Ancillary Data Blanking
If the SDI into the V6333 has audio already embedded on the selected group, it is necessary to remove any
data already in the ancillary data space, or select another group. This can be done by setting
ENG’ING:Anc Data
to
Anc Blnk
.
If the Ancillary data is set to be blanked then ALL data in the horizontal ancillary HANC space will be
removed, not just the audio data.
3.7.4
Group Deletion
Setting the
MuxGpDel
control to
Grp Del
will mark for deletion any groups already embedded on the input
video if they are to be embedded on. The original embedded group’s data is still present in the blanking of
the output video, but the identifier for the data is changed to a reserved deletion code. New embedded data
is appended to any data already present in the blanking of the input video.
It is possible to run out of blanking space if data already exists there, particularly with SD. If this happens
the embedded audio will be corrupt.
By setting
Anc Data
to
Anc Blnk
full use can be made of the blanking space, and the
MuxGpDel
control
has no effect.
