Harmonic ELECTRA VS - ESAM Implementation

Appendix G ’ESAM’ — ESAM Implementation
586 Electra VS - Version 05.10
User Manual - Rev. A
ESAM Implementation
The Electra VS is implementing the API Signal Confirmation and
Conditioning for CableLabs® ESAM (Event Signaling and Management).
Such standard has been developed to facilitate ad-insertion, black out
management and slate insertion on WebTV applications.
The following picture provides a typical architecture for OTT with a POIS
(Placement Opportunity Information System) and an external packager.
Figure G-1. Typical architecture for OTT with a POIS and an external scrambler
 Step 1
a. Electra VS is sending a message indicating an SCTE command
in the input stream to the POIS.
b. The POIS is notifying the Electra VS of the action to be taken:
- Keep the SCTE 35 command as it is.
- Replace the SCTE command by another one.
- Delete the SCTE 35 command.
Even if there is no SCTE 35 in input of the Electra VS, the POIS can ask
the Electra VS to insert an SCTE 35 command in the MPEG-2 TS stream.
 Step 2
a. Electra VS inserts an SCTE 35 command according to the POIS
request.
b. Electra VS ensures that all the profiles are synchronized (EBP
standard) in the output. In addition, it also inserts an IDR frame
on the right temporal timing (according to the SCTE command)
to authorize a frame accurate insertion of advertisement, black
out, etc. by the external packager.
Please note that all interfacing with POIS are requiring dedicated
adjustments.