Sun Microsystems MEDIACENTER 2.1 - Manual (Page 113)

Chapter 7 Server Output Data Format 7-3
7.2.2 MPEG-2 Program Stream Packet Encapsulation
The MPEG-2 Program Stream can have any packet size. The server delivers AAL-5
packets with an MPEG data size corresponding to twenty MPEG Transport packets
or 3760 bytes for the Program Stream encapsulation. This encapsulation uses a larger
ATM packet size than is used for MPEG-2 Transport Streams.
Note – Sun is not committed to the packet encapsulation for the MPEG-2 program
stream. We may choose a different encapsulation to, for example, accommodate
larger packet sizes, in future releases.
7.2.3 MPEG-1 System Stream Packet Encapsulation
The MPEG-1 System Stream can have any packet size. The server delivers AAL-5
packets with an MPEG data size corresponding to twenty MPEG-2 transport packets
or 3760 bytes for the Program Stream encapsulation. This encapsulation uses a larger
ATM packet size than is used for MPEG-2 Transport Streams.
7.2.4 Thomson Electronics Packet Encapsulation
The encapsulation for Thomson Consumer Electronics (TCE) packets is the one
required by TCE. This encapsulation consists of multiple 130-byte MPEG packets.
These MPEG packets have a special TCE-specific header.
7.2.5 MPEG-2 Encapsulation over Classical IP over
AAL5
The server encapsulates MPEG-1 and MPEG-2 packets as specified in RFC 1577,
“Classical IP and ARP over ATM” and RFC 1483, “Multiprotocol Encapsulation over
ATM.”
The server creates a UDP packet of a size that accommodates the maximum number
of 188-byte MPEG packets that fit into a Media Transmission Unit (MTU). Consult
the SunATM documentation for the MTU size for that product.