The document provides an overview of the Digital Video Broadcast (DVB) Project. It discusses the DVB Forum and its timeline of standards development. Key DVB standards include DVB-S, DVB-C, DVB-T, DVB-H, and DVB-SH. The document compares DVB standards to competing standards and outlines the system architecture and protocol stack. It also notes that Huawei Satellite Communications (HSC) is exploring opportunities to leverage and integrate with various DVB standards.

1. 07/16/16
The Digital Video Broadcast (DVB) Project

2. 07/16/16
Agenda
 Introduction to The DVB Forum
 Standards and Specifications portfolio
 Comparison with competing standards
 Evolution
 System Architecture
 Protocol stack
 How is HSC involved?

3. 07/16/16
The DVB Forum
 The European Launching Group (PPP)
 The DVB Forum incorporated in 9/93
 Managed by the DVB Project Office of the European
Broadcasting Union (EBU), Geneva
 Members develop and mutually agree on
specifications
 Specifications approved by EBU
 WG on DTV
 ~ 300 members (2007)
Open to all
organizations
involved in
broadcasting
technologies
/CENELEC
/ETSI
/ITU-T/ITU-R; become standards

4. 07/16/16
The DVB Forum
Timeline of DVB
 ’91 – ELG (PPP)
 9/93 – DVB incorporated with 80 members
 11/93 – MPEG2 (ISO/IEC 13818-2) approved by ISO
 5/94 – DVB-CSA approved
 9/94 – DVB-CA approved
 11/94 – ITU comes aboard
 3/95 – DVB-CI approved
 12/95 – DVB-T approved

5. 07/16/16
The DVB Forum
Timeline of DVB
 4/96 – DVB-T begins trials in the UK
 ‘96 – DVB-S approved
 ‘96 – DVB-C approved
 4/97 – HDTV compatibility
 4/97 – DVB-SIM (Simulcrypt) approved
 4/97 – DVB-IPDC approved
 4/13/99 – Negotiations with China
 7/19/99 – India adopts DVB-T
 CMMB?

6. 07/16/16
The DVB Forum
Timeline of DVB
 9/99 – Mobile TV demonstrated in trams in Amsterdam,
The Netherlands
 4/10/00 – Hierarchical Modulation for simulcast of HDTV and
SDTV on DVB-T
 5/00 – DVB-MHP approved
 2/14/01 – DVB-RCS approved
 4/7/03 – Work on DVB-GEM begins
 11/04 – DVB-H approved
 2/14/07 – DVB-SH approved
 NAB

7. 07/16/16
Specification and
Standardization
 The hierarchy
 General Assembly
 Steering Board
 DVB Project Office (Project Management)
 Commercial Module
 Technical Module
 IPR Module
 Public Relations/Communications/Promotions Module
 WG
 WG
DVB Project
Office

8. 07/16/16
 Technical
 Examine technological implications, explore available
technologies
 WG reaches consensus
 Support from CM
 Steering Board
 Overall policy direction, sets priority, co-ordination, budget,
regulatory guidelines
Specification and
Standardization
 The hierarchy
Approved!!
(EBU/ETSI/CENELEC/ITU-T/ITU-R)
 General Assembly
 Commercial
 Market research
 WG draws up user requirements, market parameters
(pricing, functionality)
 IPR
 IPR issues
 Communications and Promotions
 Branding and Communications

9. 07/16/16
Salient Features of the DVB
standards
 Market led
 Priority to commercial requirements
 Economies of scale
 Public benefits!!
 Interoperable
 Independent of OEM
 Maximum commonality with MPEG2 Transport (ISO/IEC
13818-2)
 Flexible
 Supports PAL, NTSC, SECAM
 SDTV/HDTV
 MPEG4-10/H.264, MPEG4-2/H.263+
 Innovation
 Universal adoption

10. 0 07/16/16
The DVB standards - Evolution
 DVB-S (1993)
 LoS
 > 10 GHz
 Simple QPSK modulation
 DVB-C (1994)
 < 10 GHz
 DVB-CS for broadcasting a complete satellite channel mux on a
cable channel
 DVB-T
 More complex (NLoS, multipath, fading)
 First COFDM standard (2K and 8K mode; optional 4K mode)
 QPSK, 16QAM, 64QAM; optional indepth interleaver for time
diversity
 Hierarchical modulation
 5 (optional)/6/7/8 MHz channels

11. 1 07/16/16
The DVB standards - Evolution
 DVB-S2
 2 versions – one is backward compatible with DVB-S, the
other is not!!
 EU plans to support both
 30% more capacity
 8PSK, Turbo coding
 DVB-H (2004)
 NLoS
 4K mode, 5 MHz BW mode and indepth interleaver become
compulsory features
 First standard with Time Slicing for power saving
 DVB-T + 4K COFDM + Time Slicing + MPE-FEC + Indepth
Interleaver + 5 MHz channel

12. 2 07/16/16
The DVB standards - Evolution
 DVB-SH (2007)
 Introduced as DVB-SSP
 Based on DVB-S and DVB-H principles
 DVB-H – (CC, RS16) + Turbo coding + 1K COFDM + 1.7 MHz
channel bandwidth + Flexible temporal interleaving (Extended
MPE-FEC)
 Direct satellite link (SC)
 Complementary ground coverage (CGC) – Gap Filler
 DVB-SH-A (COFDM on SC and CGC)
 DVB-SH-B (COFDM on CGC, TDM on SC)

13. 3 07/16/16
The competition!!

14. 4 07/16/16
Worldwide Coverage –
Terrestrial

15. 5 07/16/16
Worldwide Coverage – Cable

16. 6 07/16/16
Worldwide Coverage - Satellite

17. 7 07/16/16
Worldwide Coverage – DVB-H
DVB-
SH??

18. 8 07/16/16
The Competition….
 T-DMB: RS (MPEG) + CC(Viterbi) + Service time
interleaver + 2K/1K/½K/¼K mode + DQPSK + 1.5
MHz channel bandwidth
 ISDB-T: RS (MPEG) + CC(Viterbi) + sub-band time
interleaver + outer (bit) interleaver + inner (symbol)
interleaver + DQPSK/QPSK/16QAM/64QAM + 6/7/8
MHz
 DMB-TH: BCH + LDPC + Time Interleaver + 4K mode
+ 4QAM/16QAM/32QAM/64QAM + 6/7/8 MHz
 MediaFLO: RS + Turbo Coding + Time Interleaver + 4K
mode + TDM/FDM pilots + QPSK/16QAM + 5/6/7/8
MHz
What they do….and how they do it?

19. 9 07/16/16
…is beaten handsdown!!!
 DVB-H: MPE-FEC (RS64 + Virtual time interleaver) +
Time slicing + RS16 + CC(Viterbi) + Outer Interleaver
+ Inner Interleaver + Indepth Interleaver(optional) +
QPSK/16QAM/64QAM + 2K/4K/8K mode + 5/6/7/8
MHz
 DVB-SH: MPE-FEC (RS64 + Virtual time interleaver) +
MPE-FEC Extension + Turbo coding + Outer
Interleaver + Inner Interleaver + Indepth
Interleaver(optional) + QPSK/16QAM/64QAM +
1K/2K/4K/8K mode + 1.7/5/6/7/8 MHz
What they do….and how they do it?

20. 0 07/16/16
System Architecture
SC
CGC
Satellite ComponentComplementary Ground Coverage

21. 1 07/16/16
System Architecture – Protocol
Stack
PH
Y
LLC/MA
C
Transport/Network
Service
Application
s

22. 2 07/16/16
LLC/MAC – DVB-H
Reed-Solomon
(255,191,64) Forward
Error Correction (FEC)
Multi Protocol
Encapsulation
(MPE)
IP Data
IPv4/v6,
< 4096 bytes
188 bytes
(ISO/IEC
13818-2
compliant)
PHY
Virtual Time Interleaving
1 MPE Frame = 1 to 2 Mbits
MPEG2 Transport Stream
(TS) slicer

23. 3 07/16/16
LLC/MAC- DVB-SH
Reed-Solomon
(255,191,64) Forward
Error Correction (FEC)
Multi Protocol
Encapsulation
(MPE)
IP Data
IPv4/v6,
< 4096 bytes
188 bytes
(ISO/IEC
13818-2
compliant)
PHY
Virtual Time Interleaving
1 MPE Frame = 1 to 2 Mbits
MPEG2 Transport Stream
(TS) slicer
Extended MPE

24. 4 07/16/16
PHY – DVB-H
Convolutional
Coding (Viterbi)
Reed-Solomon
(204, 188, 16)
FEC
Bit Interleaver
Symbol Interleaver
Symbol Mapper
MPEG2
TS
188 bytes
Scrambler
Still 188
byte
packets!!
Energy
dispersal;
helps in
bit sync
204 x n
bytes
Coding rate of n
(Digital
modulation -
QPSK/16QAM/
64QAM; 2/4/6
bits per
COFDM
symbol)
1 symbol
1 symbol
16QAM
64QAM
QPS
K
RF
204 bytes
H
P
LP

25. 5 07/16/16
PHY – DVB-SH (simplified)
Turbo coder (Convolutional Coder
+ inbuilt interleaving)
Symbol Mapper
MPEG2
TS
188 bytes
Scrambler
Still 188
byte
packets!!
Energy
dispersal;
helps in
bit sync
(Digital
modulation -
QPSK/16QAM/
64QAM; 2/4/6
bits per
COFDM
symbol)
1 symbol
1 symbol
16QAM
64QAM
QPS
K
RF
H
P LP

26. 6 07/16/16
RF Receiver
Symbol FFT
Antenna
IFFT in
transmitter
1K, 2K, 4K, 8K
sample FFT per
OFDM symbol
Complex
number form
(analog)
GSM cutoff
D/A
Decision Feedback (Channel State Information (CSI))
from baseband/MAC
Frequency Domain
Equalizer (DFE)
FIR filter (simple
sample multiplication
due to circular
convolution/cyclic
prefixing)
For GSM850 in UHF
Band V

27. 7 07/16/16
Power saving in DVB-H and DVB-
SH: Time Slicing
1OFDMsymbol(1/2/4/8Ksub-
carriersin1.7/5/6/7/8MHz)
Tg Tu
 Tu is the useful COFDM symbol period, during which detection
takes place using FFT
 Tg is the Guard Interval (GI) to protect against
multipath
Pilot
carriers

28. 8 07/16/16
Single Frequency Network (SFN)
 A unique feature of DVB-H/DVB-SH
 A single frequency allocated for the entire network
 Huge cost savings in procuring spectrum during auctions
 Several engineering challenges
 SFN networks are more susceptible to multipath and
inter-carrier interference
 All transmitters of the network transmit….
 ….At the same time
 ….Same date bits
 ….At the same carrier frequency
 Higher GI used to mitigate effects of more severe
multipath in SFN networks
 However, higher GI means lower capacity and smaller cell
size!!!

29. 9 07/16/16
Six Degrees of Freedom
 GI (Tg)
 A fraction of the OFDM symbol time period
 A higher number translates to better multipath tolerance, but also means lower
capacity and smaller SFN size; less cost effective
 FFT size (mode)
 1 (DVB-SH only)/2/4 (optional in DVB-T/available in DVB-H)/8K mode
 A higher mode translates to higher capacity but lower tolerance to Doppler
(forces high speed vehicles to a higher bandwidth for same capacity)
 Channel bandwidth
 1.7 MHz (DVB-SH only), 5 MHz (optional in DVB-T/available in DVB-H), 6 MHz,
7 MHz, 8 MHz
 Modulation scheme
 QPSK (4QAM), 16QAM, 64QAM
 4QAM - lowest capacity (2 bits/sub-carrier); least susceptible to noise
 64QAM - highest capacity (6 bits/sub-carrier); most susceptible to noise
 Carrier frequency
 Lower frequency for faster vehicles, but larger antenna size
 VHF to S Band (DVB-H), C/Ku/Ka bands (DVB-SH)
 Hierarchical Modulation
 HDTV/SDTV, MPEG2/IP multiplexing

30. 0 07/16/16
Doppler performance
Shinkansen/Shanghai Maglev
TGV

31. 1 07/16/16
Members

32. 2 07/16/16
Members

33. 3 07/16/16
How is HSC involved?
+ = ??
 Opportunities are being explored
 Possible leverage in DVB-MHP, DVB-GEM, IPTV
 Tracking of DVB-SH, DVB-H2, DVB-T2 and DVB-S2
(DVB 2.0) specifications
 Integration of DVB-H and DVB-SH onto GMR-1
 HNS + HSC + Terrastar

34. 4 07/16/16
Thank You