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194
Chapter 3
Input Modules
Audio Synchronization
By default, PT-FSDMX-IBG and its variants synchronize de-embedded audio with timing
information from the video frame synchronizer prior to re-embedding the audio.
When operating an SDI channel in Frame Sync mode (FS license must be installed) and
if the ingested signal qualifies for Framesync operation (frame-rate matches the
frame-rate of the selected Reference signal), the de-embedded audio will be
automatically delayed to match the video delay. Additionally, up to three seconds of
delay can be added through the Audio Channel Delay see
x
16)) parameter.
Group (1-4) Deembedding Control
The following are options for the Group (1–4) Deembedding Control
Deembed Control (8 x
Table 3-64 Deembedding Control Options
Item
Description
Repeat
Upon detection of a de-embedding error, the de-embedder
repeats the last good AES sample.
Mute
Upon detection of a de-embedding error, the de-embedder
mutes the current outgoing AES sample.
Audio Test Tones
The following frequency levels of audio output test tones are available as a selection
from the Output Ch (1–16) Source Select parameters:
Table 3-65 Audio Test Tones
Test Tone
Frequency
Test Tone 1
400 Hz
Test Tone 2
1 kHz
Test Tone 3
2 kHz
Test Tone 4
4 kHz
Fast Video Switch
When input video is switched between two sources while both sources are within
vertical blanking, use the Fast Switch (see
fast video switching between the sources. In this mode, output video is not frozen
when both sources are within the vertical blanking area when the switch takes place.
Audio Embedding Modes
Each video channel has an audio embedder component composed of several smaller
subcomponent blocks:
One ancillary data stripper (ADS)
Four audio embedding subcomponents
4)) parameter.
Fast Switch (x 8)
Audio Channel Delay (8
(Group
†) parameter to enable
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