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One-Net/DASDEC User Manual
5-117
v3.0 | r1016
needed based on a specific network.
If
standard MPEG2 transport stream delivery
is used, then the following option is
available:
In-Band
. Check to Enable. If not checked (disabled) then
Out-of-Band (OOB)
communi
-
cation of the DVS-644/SCTE18 message is made.
The DVS-644/SCTE18 Cable Alert Message is an MPEG2 system table structure,typically
placed into the MPEG2 Transport stream and routed to the downstream cable set top
boxes (STB) or SCTE-18 enabled TV’s. The ultimate target for the DVS-644/SCTE18 alert
message is a set-top box (STB) or a cable ready TV. The actual EAS alert handling is
performed by the STB or TV, and although standard practices exist for these actions,
differences do exist. The processing of the Cable Alert Message on the STB determines
the actual response to the alert seen by a viewer. For alerts below a certain priority (by
default, this would be the highest priority, 15), a crawl message is typically run on the
video display for every channel. For alerts at or above this priority, the video channel is
forced to a details channel. Based upon whether this channel is available at the STB as
In-Band or Out-of-Band, set the
Details Major/Minor number
or the
Details Video/Au
-
dio OOB
channel numbers. This details channel is where the highest priority force tune
alerts are switched. EAN/NPT will always cause a force tune to this channel.
Details Video OOB ID/ Details Audio OOB ID
When the alert details channel is an Out-of-Band channel, set the provided video/au
-
dio channel field. An audio channel designation is not required when there is another
means to provide the alert audio. A value of 0 means not used.
Details In-Band Major / Minor Channel
These two fields are for programming the digital in-band Major/Minor channel number
of the in-band force tune details channel. A value of 0 means not used.
Exception Channel List Section
Exception Channel List
This interface allows specific In-Band and Out-of-Band channels to be excluded from
the alert response of the STB. These channels have their own EAS. When enabled, the
interface allows the creation of any number of exception channels.