Motorola APEX1000 Installation And Operation Manual page 42

CTE in UDP Port Mapping Mode (Legacy VOD)
The APEX1000 supports the legacy VOD operation, also known as the UDP Port
Mapping scheme. In this UDP Port Mapping scheme, VOD SPTSs are delivered to the
APEX1000 through GigE and muxed by the APEX1000 onto outgoing QAM MPTSs.
In this mode, the APEX1000 is not signaled regarding individual VOD sessions; instead, it
routes each incoming stream to the appropriate QAM with the appropriate MPEG
Program Number as a static function of the destination UDP Port of the incoming SPTS.
The following graphic shows this architecture:
Pre-encrypted
OLES
VOD
Pump
UDP Port Mapping Algorithm
Bits <15:14> - Set to '11' to indicate
'Mode 0' port mapping scheme
Bits <13:11> - RF output port
Bits <10:8> - QAM Channel on that port
Bits<7.0> - Output MPEG program number
Note: The figure above shows the standardized port mapping mode as defined by
Harmonic. While other schemes have been used (and were supported by the SEM), the
APEX1000 will only support this exact scheme.
Additional Notes:
1. To apply a basic level of encryption (mostly for privacy) to each stream, the APEX1000
is typically configured for CTE (common tier encryption).
2. Incoming streams may already be encrypted (perhaps using the OLES for
pre-encryption), in which case the APEX1000 muxes the stream as is, without disrupting
the encryption or ECMs.
3. Typically, the VOD streams will be Constant Bit Rate (CBR), usually 3.75 Mbps for
video services, to allow for simpler and well-behaved remuxing (10 services per 256
QAM mux).
Overview • Supported Encryption Types
APEX1000 All-Purpose Edge QAM Software Version 2.4.x • Installation and Operation Manual
573408-001-a
SPTS
DWDM
Network
Clear
SPTS
ENET
1 1
Clear &
pre-encrypted
SPTS
IP UDP MPEG TS Packets
Bits <13:8> Bits <7:0>
UDP Destination Port
B
DAC
RDS
(EMMs)
APEX
(CTE)
QAMs
(encrypted)
24