Chapter 6
The MPEG-2 4:2:2 SD Decoding Card provides 4:2:2 video decoding facilities.
6.1.6 MPEG-4 AVC 4:2:2 Decoding Card (RX8200/BAS/2)
This option is only available for the RX8200 DVB Receiver.
RX8200/BAS/2 is equipped with MPEG-4 4:2:2 decoding functionality. This function
is dormant and is enabled with additional software options.
6.1.7 IP Output Card (RX8XXX/HWO/IP/OUT)
This option is available for the RX8200, 8310, 8315 and 8330 DVB Receivers.
The IP Output card supports 1000BaseT Ethernet transmission of encapsulated
transport stream.
The mapping of MPEG-2 TS packets into IP data frames is done according to the
protocol stack shown in Figure 6.1. The figure shows the Protocol Stack in use when
mapping MPEG-2 into IP frames and Ethernet.
Figure 6.1: The Protocol Stack
The MPEG-2/DVB layer is specified in ISO/IEC IS 13818 – Generic Coding of
Moving Pictures and Associated Audio. The UDP layer is compliant with RFC768 –
User Datagram Protocol. A configurable number of 188 byte MPEG-2 TS packets
are mapped straight into an UDP frame with no additional overhead. The MTU for
Ethernet is usually 1500 bytes. This limits the number of MPEG-2 TS packets per
UDP frame to lie within one to seven.
The IP layer is according to RFC791 – Internet Protocol Specification.
Link layer – 1000BaseT Ethernet
Transport layer - IP
TCP/UDP UDP – User Datagram Protocol
MPEG-2/DVB layer
MPEG-2 Transport Stream
(Multi-Program Transport
Stream or Single-Program
Transport Stream)
Control traffic for in-
band management
(telnet, http, snmp)
EN/LZT 790 0005 R1A
6-6
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