DekTec DTM-3200 IP-ASI Converter - Manual (Page 9)

DTM-3200 – OEM Ethernet TSoIP Converter
User Manual
9
1.6.2 ASI-to-IP converter mode - Functional block diagram
Figure 5 shows the functional block diagram of the DTM-3200 when it is configured as ASI-to-IP
converter.
TS
Receive
Channel
Processor Subsystem
IP
D
A
T
A
IP
Filter
FEC
generator
LVDS
receiver
ETHERNET
INTERFACE
MAC
IP
Transmit-
ter
IP
Receiver
IP
D
A
T
A
DDR2
SDRAM
Controller
DDR2
SDRAM
Phy
IP
Embed-
der
Cable
equaliser
De-
serializer
RS232 or
RS485 or
RS422
I 2 C
DVB-SPI
DVB-ASI
C
O
N
T
R
O
L
E
th
e
rn
e
t
C
O
N
T
R
O
L
C
O
N
T
R
O
L
C
O
N
T
R
O
L
C
O
N
T
R
O
L
C
O
N
T
R
O
L
IP
Transmit-
ter
Intput
select
V
a
lid
Figure 5: Functional block diagram of the DTM-3200 when configured as ASI-to-IP converter
The incoming stream is received either through the serial or the parallel input. Only one stream can
be received at a time. If the Deserializer detects a valid input stream, the Input Selector selects the
DVB-ASI input, otherwise the Input Selector selects the parallel input. The TS Receive Channel
synchronizes to the stream and determines the packet size (188 or 204 bytes). If the DTM-3200 is
configured to generate FEC packets, the FEC Generator will create row and column FEC data. The
IP Embedder embeds the TS packets in IP packets. Finally, the PHY transmits the IP packets through
the Ethernet interface.
1.7 List of abbreviations
ASI Asynchronous Serial Interface. Shorthand for DVB-ASI.
auto-MDIX Automatic medium-dependent interface crossover. Technique to
automatically detect the type of network cable: straight-through or
crossover.
DHCP Dynamic Host Configuration Protocol. Network protocol to automatically
assign an IP address to a network port from a server.
DVB Digital Video Broadcasting
FEC Forward Error Correction
IP Internet Protocol
MAC Media Access Controller
Mbps Megabit per second
NA Not Applicable
NC Not Connected
PCR Program Clock Reference
R/W Read / Write
RO Read Only