ENENSYS Technologies - POSTER - Find Your Way in DVB-T2

ENENSYS Technologies - POSTER - Find Your Way in DVB-T2

D
VB-T2
DVB-T2 vs DVB-T
DVB-T2 digital TV broadcast architecture
DVB-T2
DVB-T2 Lite
T2-MI
CC + RS
T2-MI
Code Rate 1/2, 3/5, 2/3, 3/4, 4/5, 5/6
1/2, 3/5, 2/3, 3/4, 2/5, 1/3
1/2, 2/3, 3/4, 5/6 7/8
Constellation QPSK, 16 QAM, 64 QAM, 256 QAM
QPSK, 16 QAM, 64 QAM, 256 QAM (up to code rate 3/5) QPSK, 16 QAM, 64 QAM
Guard Interval 1/4, 19/256, 1/8, 19/128, 1/16, 1/32, 1/128 Reduced set of combinations of FFT size, GI and Pilot Patterns 1/4, 1/8, 1/16, 1/32
FFT size
Scattered Pilots
Continual Pilots
Bandwidth
Max. Bandwidth
1K, 2K, 4K, 8K, 16K, 16K ext, 32K, 32K ext 2K, 4K, 8K, 16K, 16K ext.
PP8 not allowed
1%, 2%, 4%, 8% of total
0,35 % of total
0,35% of total
1.7, 5, 6, 7, 8 Mhz
1.7, 5, 6, 7, 8, 10 Mhz
50,34 Mb/s
4 Mb/s per PLP
R
National Head-End
DVB-T
LDPC 16k only
FEC LDPC + BCH
O N AI
MPEG2-TS
Multiplexer
T2-MI
Regional Head-End
2K, 8K
8% of total
2,6 % of total
T2-MI
T2-MI
MPEG2-TS
Seamless IP Switch
IPGuard
Multiplexer
5, 6, 7, 8 Mhz
31,66 Mb/s
MPEG2-TS
DVB-T2 Framing
T2-MI Encapsulation
188 bytes
T2 Super Frame
Super Frame
Super Frame
Super Frame
TSF = 64s Max (128s Max with FEF)
T2 Frame
0
T2 Frame
T2 Frame
2
T2 Frame
1
...
FEF
T2 Frame
NT2-1 = 254 (Max)
FEF
BaseBand Frame
BB
Header
TS = 250ms Max
P1
Symbol
OFDM symbols
DBPSK
Modulation
BPSK
P2
Symbol 0
BPSK
QPSK
16, 64 QAM
L1
L1
Pre Post
L1
Pre
P2
Symbol 1
P2
... Symbol N
P2-1
Common
PLP
Data
Data
Symbol 0 Symbol 1
Data
Symbol 2
Data
Symbol 3
Data
Data
... Symbol N
Symbol 4
Lda-1
T2-MI Packets
QPSK
16,64 QAM
256 QAM
Data
PLP0
...
BB
Header
Data Field
BB
Header
Data Field
BB
Header
...
L1 Current
T2 TimeStamp
T2 Frame
Data
PLP1
...
Auxiliary
Stream
MPEG2
Transport Stream
...
...
Interleaving Frame
Configurable
Dynamic
Extension
CRC
TI Block
0
TI Block
1
T2-lite overview
TI Block
2
T2-lite signal broadcast within PLP
Data
rate
FEC Blocks
64 800 bits
BB
Header
FEC Frame
T2-MI Packets
BB
Header
Data Field
53 840 bits Max.
QPSK
16,64 QAM
256 QAM
QPSK
16,64 QAM
256 QAM
...
...
MPEG2
Transport Stream
L1 Current
BB
Header
Data Field
BB
Header
Data Field
LDPC
BCH
Composite signal containing T2-base and T2-lite
FEF
HDTV
PLP1
SDTV
PLP2
T2 superframe
FEF
T2-lite superframe
FEF
dedicated FFT,
Guard Interval ,
SFN, MISO/SISO
Radio
PLP3 T2-lite
PLP4
T2-lite
<4 Mbps PLP5
Data Field
FEF
Auxiliary
Streams
<4 Mbps
Time
ENENSYS Technologies - Le Germanium 80 avenue des Buttes de Coesmes - 35700 Rennes - France - [email protected] - +33 1 70 72 51 70
www.enensys.com