Digital Multimedia Broadcasting
November 2007
Jo, GueJo
Contents
I
Introduction of DMB
II
Service in Korea
III Business Model
IV
DMB Overseas Launching Status
V
Future Service
2
I Introduction of DMB
3
1. Definition
Provides video and data services as well as CD-quality audio service
AV and data standard extension of Digital Audio Broadcasting(DAB)
Fully backward compatible with Eureka-147
DMB Transmitter
GPS
Radio Studio
TV Studio
i
Additional info
provider
Fixed
receiver
Distribution
Network
Terminal for
Moving vehicles
Mobile
Terminal
Mobile
Communication network
4
2. Characteristics of T-DMB
Personal services using individual receiver
Personal
. Mobile phone, PDA, Notebook PC, DMB receiver
Seamless reception of broadcasting contents
Mobile
. Any time, anywhere
. Good reception at the speed of 150 km/h
Bidirectional services linked with mobile
communication network
Interactive
. PPV, on-line shopping, internet services
Personal Mobile Interactive Multimedia Broadcasting Service
5
3. Available Multimedia Service
Audio only service
Stereo(CD-like)
Video service
Video : VCD quality(7” LCD)
Audio : Stereo(FM-like)
Program related Data
Data service
Electronic Program Guide
Headline news, Weather, Stocks
Traffic, Navigation
Slide show, Broadcasting Web Service, etc.
6
4. System Structure
Modulator
DAB system
+ Multimedia Processor
Radio
Transmitter
MUSICAM Encoder
TV
T-DMB Encoder
= DMB
Ensemble
MUX
Data
TTI Streamer
BWS Encoder
Audio Service (MUSICAM)
Packet or stream Mode
Data Service
Video
Associated
Audio
(Interactive)
Data
Video
Encoder
(H.264)
Audio
Encoder
(ER-BSAC)
Video service
TS
Mux
RS
Encoder
(204,188)
Conv.
Interleaver
DAB
MUX
Stream
Mode
Additional modules for T-DMB
OFDM
Modulation
Transmitter
Eureka-147 DAB System (ETSI 300 401)
7
5. Transmission Parameters
Signal
COFDM
Modulation
DQPSK
Channel Coding
Convolutional : variable rate, constraint length = 7
Time Interleaving
Ms
Depth = 384
Frequency Interleaving
MHz
Width = 1.536
System Bandwidth
MHz
1.536 MHz
Effective Data Rate
Mbps
0.8 ~ 1.7 Mbps
Mode
Application
Frequency Band
GHz
Sub carriers
I
II
III
IV
Terrestrial(SFN)
Terrestrial
Satellite/Cable
Terrestrial
< 0.375
< 1.5
<3
< 1.5
1,536
384
192
768
1
4
8
2
Sub carrier interval
KHz
Guard interval
us
246
62
31
123
Symbol length
us
1,000
250
125
500
Frame length
ms
96
24
24
48
※ COFDM : Coded Orthogonal Frequency Division Multiplexing
※ DQPSK : Differential QPSK
8
6. Spectrum Utilization
Usable Spectrum for T-DMB
VHF Band-III (TV ch-7~ch13, 174~216MHz)
L-band (1452~1492MHz)
Example: Ch.12 in Korea
Block A
512kHz
1.536MHz
192kHz
Block B
Block C
192kHz
1.536MHz
1.536MHz
KBS
SBS
MBC
496kHz
1 TV Channel (6MHz)
204MHz
210MHz
Effective Data Rate 1.152Mbps
video
(512kbps)
audio 1
audio 2
audio 3
(128kbps) (128kbps) (128kbps)
video 1
(512kbps)
data
(256kbps)
video 2
(512kbps)
data
(128kbps)
9
7. Technologies for T-DMB
A/V Encoding
MPEG-4 Part 10 AVC(H.264) and BSAC/AAC
Increase Frequency Usage Efficiency
Interactive Data
MPEG-4 System core2D Profile(BIFS)
Video Program associated Data Service
MPEG-4
AVC
Video
MPEG-4
BSAC/AAC
Audio
MPEG-4 BIFS
Interactive
Contents
MPEG-4 SL
MPEG-4 SL
MPEG-4 SL
Encapsulation Encapsulation Encapsulation
adaptation
MPEG-2 TS Multiplexing
Error Correction
RS-Coding, Convolutional Interleaving
High Quality in Audio/Video
transport
Forward Error Correction
Transmission
OFDM(Orthogonal Frequency Division Multiplexing)
Good service quality in high speed moving vehicle
EU-147 DAB Stream Mode
10
8. T-DMB Service Category and Standard
Type
Audio
Quality
Technology
Near CD quality stereo(BER 10-4) MUSICAM(MPEG-1,2, layer 2)
Video
7” display
MPEG-4 AVC(H.264)
Audio
Near CD Quality
Video
Data
Many applications
streaming
(DMB) Multiplex A/V/D
Mobile, Urban
Channel
(BER 10-8)
Data
MPEG-4 BSAC
MPEG-4 BIFS
MPEG-4 SL, TS
RS(204, 188), Convolutional Byte
interleaver
EPG, news, weather, stock, traffic PAD, NPAD,TDC, MOT, BWS, IPinformation, etc.
tunneling, Slideshow, etc.
※ AVC : Advanced Video Coding, PAD : Program Associated Data, TDC : Transparent Data Channel,
※ BWS : Broadcasting Web Site, BSAC : Bit-sliced Arithmetic Coding, EPG : Electronic Program
11
9. Broadcasting Protocol in T-DMB
◆ Broadcasting Web Site
◆ Local Interactive Service
◆ JPEG Slide Show
◆ EPG
IP
MPEG4 MPEG4
TDC
Tunneling
A/V
Data
MPEG-4 SL
Audio
PAD
NPAD
MPEG-2 TS
FEC
Data Service
Video Service
Audio Service
Packet Mode
Stream Mode
MSC
Eureka-147(System-A)
2 Ch
TMC
MCI EWS
&
SI
FIDC
FIC
Multi
DLS TDC
Ch. 5.1
◆ TPEG, DGPS etc
MOT
※ DLS : Dynamic Label Segment, EWS : Emergency Warning System, FIC : Fast Information Channel
※ FIDC : Fast Information Data Channel, IP : Internet Protocol, MCI : Multiplex Configuration Information
※ MOT : Multimedia Object Transfer, MSC : Main Service Channel, NPAD : Non PAD
※ PAD : Program Associated Data, SI : Service Information, TDC : Transparent Data Channel
※ TMC : Traffic Message Channel
12
II Service in Korea
13
1. Commercial Service in Korea
Launched in Dec. 2005 covering Seoul metropolitan area
Total Channel : Video 7 Audio 13 Data 8
Spectrum : VHF Band III (TV channels 8 & 12)
KBS
MBC
SBS
YTNDMB
U1media
HankookDMB
Terrestrial VHF Bandwidth
AFN
ch2
T-DMB
ensemble
T-DMB
Channel
KBS1
SBS KBS2
ch3
ch4
ch5
ch6
ch7
ch8
MBC
EBS
ch9 ch10 ch11 ch12 ch13
U1 media
YTN DMB
Korea DMB
MBC DMB
KBS DMB
8A
8B
8C
12A
12B
Video 2
Data 1
Video 1
Audio 2
Data 1
Video 1
Audio 2
Data 1
Video 1
Audio 3
Data 1
Video 1
Audio 3
Data 1
SBS DMB
12C
Video 1
Audio 3
Data 3
14
2. Nationwide DMB Network
13
13
봉의산
Metropolitan area
12
13
괘방산
13
8
13
태기산
용문산
8
관악산
봉황산
13
백운산
9
일월산
9
우암산
11
11
9
가엽산
흑성
산
원효봉
13 DMB broadcasters for nonMetropolitan area
함백산
70Km
8
학가산
11
7
계룡산
식장산
6 regional broadcasting areas
7
팔공산
Nationwide commercial T-DMB
service: mid of 2007
모악산
9
9
감악산
8
노고단
9
망진산
무등산
8
7
조항산
12
12
8
대둔산
무룡산
12
12
12
불모산
황령산
망운산
7
남산
13
7
13
견월악
삼매봉
8
15
3. Terminal Types
Totally 6.3million Receivers sold
in Korea until the last July
Unit: 10,000
Cellphone
39.8%
357
Feb.
Feb
2007
134.
272
249 147 .
PDA, PMP
8.9%
Navigation
43.6%
37 55
Others
6.5%
Notebook
1.2%
625
July .
2007
8.0
25 41
7.0.
Others
Total
16
4. Available Terminals
High Price
Devices
$400 ~ $800
Erantech
iubi BLUE
DigitalCube
i-STATION
Zen Networks
LEO V10
New Media
Life TAVI
Samsung
yepp
▪▪▪
more
neoSOL CLIOD Gigatelecom
CLIOD PMP3550 Tube ND-100
Mid Price
Devices
$200 ~ $500
DigitalCube
i-STATION V35
Cowon Hyundai Autonet
A2 T-DMB
HNA-6220
Samsung
DMB-T450
Samsung
DMB-T750
▪▪▪
more
Samsung
SPH-B2300
P&C
PT-K1800
P&C
PT-L1800
LG
KD-1200
LG
SB-100
LG
LT-1000
Low Price
Devices
▪▪▪
more
$50 ~ $120
Cobalt Technology
DMB STICK-K1
Cerings
CTD-100
UVBro Technology
ARTEMIS
MNBT
UD-100
Caros
KSD-7070S
Perstel
DR 402 VK
17
5. Responses from Users
T-DMB Satisfaction Rate
Item
Very good
5.0
Satisfaction:
77.5%
Good
0.0
49.0
Same contents to home TV channel
27.7
Mobile reception
16.1
Audio & Video reception with a
single device
Contents only for DMB
22.5
So so
Bad
Satisfaction
72.5
Unsatisfaction:
22.5%
Dissatisfaction
%
Watch any where
5.8
1.3
Coverage
73.3
Same contents to home TV channel
11.1
Contents
6.7
AV quality
6.7
18
III Business Model
19
1. Business Model
TV
Radio
Free to air
Revenue from the
Advertisement
Fast Creation of
Customer Base
Pay service
Data
Services
(Interactive) Flat Rate/Usage Based
( + Comm. Expenses )
Free
Service
Revenue
Advertisement
Market
Creation
Develop
Pay
Services
Data Service , TTI
Cooperate with telco
20
2. Business Model
Advertisement
• Condition
5 million users
• Total revenue
1 Video Channel
☞US$ 80
million/year
1 Audio Channel
☞US$ 18
million/year
Pay Services
• EPG
• TPEG
• Location Based
Services
☞ Shopping
☞ Restaurant
• Weather
• Stock
Added
Services
• TVTV-Portal
• Video/Audio related
data services
☞ VOD, MOD, Capture
☞ Detailed program
guide
• Program community
☞ SMS Reply
☞ Chatting between
audiences
• Network game/quiz
• M-Commerce
21
IV DMB Overseas Launching Status
22
1. DMB Overseas Launching Status
U.K
London
(’04.12, ’05,9)
Norway
France Paris,
Cannes(’04.12,
’05.04)
Germany
Munich,
Berlin
Hanover
Italy
(07.2~)
Vatican
City
(07.2~)
Nether
land
(‘07.6~)
Canada
China
Korea
(05.12.~)
India
Hong
Kong
Ghana
(‘07.7~)
Indonesia
(’07.3~)
South
Africa
(’07.1~)
Commercial services:
3 countries
Preparing: 3 countries
Trial Test: 9 countries
23
V Future Service
24
1. Future Service : Personalized T-DMB
Dynamic program guide and contents browsing according to program
genre and user preferences
ToC (Table of Contents) based browsing in terms of segment units
Event/index-based summary and access for news programs
Keyword-based segment search
※ Services: Personalized News, Personalized T-Learning, etc.
25
2. Future Service : Advanced T-DMB
Doubled Data Rate
1.062 Mbps 2 Mbps
1
Multichannel Services
double the number of programs
2
High quality AV service (7” 15” SD-quality video
and 5.1 ch audio)
26
3. Future Service : 3D T-DMB
3D DMB Verification System
3D AV media processors on T-DMB Transmitter/Receiver
Features
•Compatible with the standard T-DMB
•2D/3D display selectable
R
3D Digital Broa ealis
t
3D lay Multimedia
sp
Di
Broadcastin
d c ic
as
tin
g
3D DMB verification system
Applications
gB
DM
3D Cellular phone
3.5”
Autostereoscopic
display
3D DMB Receiver prototype
3D Portable
media player
3D Receiver
over T-DMB
27
THANK YOU
Jo, GueJo
Gue-jo.jo@itu.int
28