Digital Audio Broadcasting - DAB - Digital Video and Audio Broadcasting Technology - page 489

transmitted in stream mode. This is the case e.g. in the T-DMB method
(South Korea). In Packet Mode, a subchannel is additionally sub divided
into packets of a constant length of 24, 48, 72 or 92 bytes.

FIC SC1 SC2 SC3 SC4 … SCn

ETI

Header

MST (Main Stream Data)

. . .

Packet
header
with
packet ID

24/48/72/92 byte long packets

n * 8 kbit/s
Subchannel packet

Fig. 26.25. DAB data structure in packet mode

Nontime
interleaved

Time interleaved

SC1 SC2 SC3 SC4 … SCn

FIC

MSC (Main Service Channel)

FIB … FIB

FIB=Fast Information Block

FIC=Fast Information Channel

FIDC
Fast
Information
Data
Channel

MCI
Multiplex
Configuration
Information

SI
Service
Information

Fig. 26.26. Structure of the DAB Fast Information Channel (FIC)

A packet begins with a 5-byte-long packet header which contains the
packet ID, among other things. The packet ID can be used for identifying
the contents. A packet ends with a CRC checksum. This provides for