CHAPTER 3: FIELD APPLICATIONS
3-4
MDU Solutions
®
– DVIS/DVISm - Digital Video Insertion System & Mini Digital Video Insertion System - Installation & Operation Manual
3.3.4 RF QAM Local Program Add/Drop
The DVIS system can be used to insert local programming into the actual data stream of a QAM by dropping specific programs
from an existing QAM channel and replacing them with local content, Figure 3-5. This application requires an optional DEMOD
Card and Channel Deletion Filter. In this application, the original system EIA channel is filtered out and a new QAM channel
inserted in it’s place, however, before deletion the incoming QAM channel is demodulated and de-multiplexed. This allows
insertion of local content in a more granular manner, right at the program level. Any incoming programs may be selected to
be deleted, even an encrypted program, and in their place, SD or HD programs may be inserted. Replaced programs will be
‘in the clear’.This has the benefit of retaining programs in the QAM that must remain and using the deleted program space to
provide the local content to the property. Only content payload is manipulated (dropped/replaced/added). All other data/tables
from incoming QAM is passed through without any affect.
3.4 IP Video Insertion Application
3.4.1 IP Insertion - MDU
This application uses encoding capability with IP output to insert programming into an IPTV property for distribution, Figure 3-6.
The DVIS platform with GbE output card may be used to insert IP video content directly to a network switch for transmission
on the plant in a hotel or other hospitality environment or transported via Edge QAM and optical for remote delivery.
Figure 3-5:
Local Add/Drop of Programs in a QAM
Figure 3-6:
IP Insertion for an MDU
