User guide

IP Protocols
F.1 IP Protocol Stack
F.1.1 Mapping of MPEG-2 TS Packets
The mapping of MPEG-2 TS packets into IP data frames is done in the IP-OUT
module according to the protocol stack shown in Figure F.1.
PSI/SI
Electrical (STP)
Ethernet (802.3/802.3u)
Max. 64
channels
AudioVideo
MPEG-TS
Video
Video
Audio
Audio
RTP
IP
IP
IP
IP
UDP
IP
TCP/UDP
Control traffic for in-band
management. (Telnet,
http, ftp,snmp
)
Figure F.1 Protocol Stack IP.
F.1.2 MPEG Layer
The MPEG-2/DVB layer is specified in ISO/IEC IS 13818 “Generic Coding of Moving
Pictures and Associated Audio”. The main functionality of this layer is to transform
MPTS (Multi-Program Transport Streams) into a number of SPTS (Single-Program
Transport Streams). A transport stream carrying multiple programs is in this way
split into a number of ‘mini’ transport streams, each carrying a single program. This
ensures that the video can be passed through limited bandwidth links such as ADSL
further down the transmission path.
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