Thresholds are used to determine when to actually raise an alarm upon detection of an error. The
Captions — Thresholds
view makes it possible to define threshold values that operate at stream level.
Thresholds are associated with each stream in the
Multicasts — Streams — Edit
view. To add a
new threshold setting — click the
Add new threshold
button and assign a name and value to the new
threshold.
In the threshold presets list the ‘Refs’ column displays how many streams are associated with each
stream threshold template.
Another way of creating a user-defined thresholds is by highlighting one of the thresholds already defined
and then clicking the
Duplicate highlighted
button.
Deleting a threshold is done by highlighting the threshold that should be removed and clicking
Delete
selected
. Note that the predefined ‘No Captions’ threshold template cannot be deleted or changed.
Caption Thresholds
Name:
Unique name of these threshold settings
Enabled:
Tick this to start closed caption extraction for streams using this threshold
Min. SCTE 20:
Minimum number of SCTE 20 caption services expected in services
Min. CEA 608:
Minimum number of non-SCTE 20 CEA 608 caption services expected in services
Min. CEA 708:
Minimum number of CEA 708 caption services expected in services
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VB7880 Advanced Content Extractor User’s Manual version 5.2
