Messaging System Applications - Imagine communications Selenio BNP 2xr User Manual

Overview
- BNP Applications

Messaging System Applications

BNP support for messaging system applications is described in the following topics:
Digital EAS and Operator / Advanced
•
Graphic Overlay
•
Digital EAS and Operator / Advanced Messaging
Leveraging its existing high-density video processing technology, the BNP's digital Messaging System
capability allows operators to program both digital SCTE 18 Emergency Alert System (EAS) alerts and
operator-generated messages. The Advanced Messaging option allows importing graphics and text
files into the operator crawl message. EAS and Operator / Advanced Messaging alerts are delivered
universally throughout the network, overcoming existing challenges that cable operators face in
supporting analog and digital subscribers with an increasing range of decoding technologies.
The BNP's Messaging System support can be applied selectively to any MPEG-2 program being
processed. EAS and operator-generated messages are digitally rendered and overlaid directly onto a
program, delivered directly to any digital subscriber set-top box or to analog decoders, and presented
as an overlay alert crawl to viewers. The BNP also supports operator-configurable audio override or
audio stream insertion to complement the text crawl message generated by industry-leading EAS
management vendors for a completely customizable deployment.
A BNP in an SCTE 18 digital EAS application is shown in
Figure 5. BNP in SCTE 18 Digital EAS Application
EAS
ENDEC
(SCTE-18
Compliant )
Baseband Baseband
Video Audio
Graphic Overlay Insertion
In addition to EAS and operator messaging, the BNP Messaging System Logo Overlay option supports
insertion of graphic overlays into any MPEG-2 program being processed. Graphic overlays are based on
importing static graphic Portable Network Graphics (PNG) files. Importing text files is also supported,
meaning that customers can create a library of graphic and text files to routinely use (see workflow
example below). You can preview the imported PNG files before starting the overlay insertion.
The location of the insertion is configurable with positioning anywhere on the display screen defined
by (x,y) screen coordinates based on pixels relating to program resolution (e.g., SD and HD). Logo
overlay files can be created with PNG alpha channels to control transparency effects supported by the
BNP during the insertion of the overlay. Additionally, background transparency support is available for
non-ascii text overlays in order to support foreign markets.
Selenio TM BNP User Guide, Release 3.7.1
Messaging.
Insertion.
Digital
Video Services
GigE
Broadcast Network Processor
SCTE-18
10BT
Messaging
(contains Text Crawl)
GigE
Digital EAS
Audio &
Video
Digital Encoder
Figure 5.
GigE GigE
B N P RGB
Digital Video
Services with
EAS Text Crawl
and
Audio Override
GigE
NTSC
Modulated
Channels
Digital Decoder and
Modulator
QAM
Modulated
Channels
QAM Modulator
16