ISDB-T, the Future of
Digital Television in the Philippines
Presentation 10
Broadcasting Station Facility
27th - 28th.February.2008
Manila, Philippines
DiBEG JAPAN
Takeshi SAWADA
( TOSHIBA )
DiBEG
Digital Broadcasting Experts Group
1
Contents
1. Broadcaster’s Infrastructure (Studio System)
2. Broadcaster’s Infrastructure (Transmission System)
3. ISDB-Tsb; Digital Sound Broadcasting
(Family of ISDB-T)
DiBEG
Digital Broadcasting Experts Group
2
1. Broadcasters Infrastructure
(Studio System)
-Analog to Digital
-System Block Diagram
-Example of Master System
DiBEG
Digital Broadcasting Experts Group
3
Analog to Digital
Differences Between Analog and Digital Broadcasting
Analog
Analog
broadcasting
broadcasting
Vision
Analog
STL
Master
Sound
Analog
transmitter
Key technologies
Digital
Digital
broadcasting
broadcasting
Vision
Sound
Data
DiBEG
Digital Broadcasting Experts Group
Digitalization
Master
Digitalization
Coding
Coding
Coding
Multiplexing
MPEG Coding/Multi-plexing
OFDM
transmission
Digital
STL
Digital
transmitter
4
Applications
Segments: 12
Segments: 1
10:00
SDTV２
SDTV３
Supplemental
broadcast
SDTV１
Supplemental
broadcast
9:00
Supplemental
broadcast
Time
HDTV
Supplemental
broadcast
Supplemental
broadcast
8:00
1 segment service for mobile phone
DiBEG
Digital Broadcasting Experts Group
5
Overall Block Diagram
Program
Information
System
Data Service
Production
System
Data
Server
Ether-Net LAN
Automation
Data Service
Server
Alarm
System
SI/EPG
Server
LOCAL LAN
Program
Server
CM Server
HD Program
VTR
Net
Terminal
Station
RMP
SD Program1
SD Program2
Matrix
Switcher
1-SEG Program
SI
RMP： Rights Management and Protection
ENC/MUX： Encoder / Multiplexer
DiBEG
Digital Broadcasting Experts Group
STL
TX
Data services
Analog program
SI/EPG :Service Information/Electric Program Guide
ENC/
MUX
NET (HD:1 SD:1)
Analog STL
Net Terminal
Station
6
Block diagram of ENC/MUX
Total Control of Base
Band and ENC/MUX
Data
Server
Ether-Net LAN
Touch Panel
Terminal
Automation
VIDEO
AUDIO
Matrix
Switcher
Source
Input
Encoding
Parameter
Primary
TS
PSI/Transmission
Control Data
ISDB-T Transmission
Control Data
HD-ENC
SD1-ENC
SD2-ENC
System Change
ISDB
MUX
Transmission
Control Data
Multiplex TS
TS Splicer
STL
TX
1-SEG ENC
SI/EPG
Data Service
・Black Burst
SYS-1
ENC/MUX SG
Reference SYNC/MUX/SFN
・ 10MHz
SYS-2
DiBEG
Digital Broadcasting Experts Group
ENC/MUX
7
Example of Master system
(TV Tokyo)
-Operation
-Operationby
byfew
fewclues
clues
-Efficient
-Efficientpositioning
positioning
-Multi-view and/or
Multi
-Multi-view
and/orselection
selectionon
onwide
wide
screen
screenLCD,PDP
LCD,PDP
-Use
-Usetouch
touchpanel
panelfor
foroperation
operation
-monitoring
-monitoringanother
anotherline
lineatat
monitoring
monitoringbooth
booth
DiBEG
Digital Broadcasting Experts Group
8
Example of Master system
(TV-asahi)
DiBEG
Digital Broadcasting Experts Group
9
2. Broadcasters Infrastructure
(Transmission System)
(1)High Power Digital Transmitter System
(2)Transmission Network System
(3)Trans-poser of Digital Terrestrial Broadcasting and
new technology
(4)Peripherals
DiBEG
Digital Broadcasting Experts Group
10
(1) High Power Digital Transmitter system
(a) An Example of Conceptual block diagram (Full redundant system)
UP
Conv.
High Power
AMP
OFDM
MOD
UP
Conv.
High Power
AMP
Select
Divider
Transport
Stream
OFDM
MOD
To Antenna
(b) Power Line-up in Japan
Area
Digital TX
Analog TX
note
Tokyo
UHF
10 kW
VHF 50 kW
wide area key station
Osaka
UHF
3 kW
VHF 10 kW
same as above
Nagoya
UHF
3 kW
VHF 10kW
same as above
(c) Examples of Hardware; see following pages
DiBEG
Digital Broadcasting Experts Group
11
Examples of High Power Digital Transmitter (Toshiba)
10 kW digital
Transmitter(2/3 type)
Output power series;
-10kW(2/3) type; for Kanto area
-3kW dual type; for Kansai and Chukyo
-1kW dual type; for medium cover area
DiBEG
Digital Broadcasting Experts Group
3 kW digital
transmitter rack
1 kW digital
transmitter rack
Feature;
-Any of cooling type (water or air)
-Equipped high performance non-linear
distortion compensator
12
Examples of Digital Transmitter (NEC)
Features
1) Both liquid cooling / air cooling available
2) Compact size / Minimized footprint
3) Adaptive Digital Corrector to maintain optimal signal quality
4) Color LCD to monitor detailed parameters
3kW Air Cooled
UHF Digital TV Transmitter
(in operation at Osaka & Nagoya stations)
DiBEG
Digital Broadcasting Experts Group
10kW Water Cooled
UHF Digital TV Transmitter
(in operation at Tokyo station)
13
(2) Transmission Network System
Classification of network system
TS transmission
Microwave / Fiber link
IF transmission
Microwave
Broadcast-wave relay
DiBEG
Digital Broadcasting Experts Group
14
An Image of transmission network chain
Transposer
Broadcast
wave relay
Transposer
Broadcast
wave relay
Transposer
Transposer
Broadcast
wave relay
Micro TS-TTL
Micro IF-TTL
Main Transmitter
Transposer
Micro TS-STL
Optical TS-STL
DiBEG
Digital Broadcasting Experts Group
Studio
15
Classification by Transmission measures
1. TS transmission system by microwave link
TS
Microwave TX
CODER
CODER
CODER
CODER MUX
CODER
CODER
UP
64QAM
UP SHF
SHF
64QAM
CONV
MOD
PA
CONV
MOD
PA
Microwave
RX
DOWN
DOWN
CONV
CONV
TX
TS
OFDM
f2
UP
OFDM UP PA BPF
DEMO
BPF
DEMO MOD
MOD CONV
CONV PA
Same construction as TV TX
2. TS transmission system by fiber link
TS
Optical TX
CODER
CODER
CODER
CODER MUX
CODER
CODER
DiBEG
Digital Broadcasting Experts Group
E-O
64QAM
UP
64QAM
CONV
MOD
CONV
MOD
Optical
RX
O-E
DOWN
CONV
CONV
TX
TS
OFDM
f2
UP
OFDM
UP PA BPF
DEMO
BPF
DEMO MOD
CONV
MOD CONV PA
16
Classification by Transmission measures
3. IF transmission system by microwave link
Microwave
RX
IF
TX
IF
f2
Microwave TX
CODER
CODER
DOWN
DOWN
CONV
CONV
UP
OFDM
UP SHF
OFDM
SHF
CODER
MUX
CODER
CONV
MOD
MOD CONV PA
PA
UP
UP PA BPF
PA BPF
CONV
CONV
CODER
CODER
4. Broadcast-wave relay system
RX
IF
DOWN
DOWN
CONV
CONV
DiBEG
Digital Broadcasting Experts Group
UP
UP
CONV
CONV
TX
PA
BPF
PA BPF
RX
IF
DOWN
DOWN
CONV
CONV
UP
UP
CONV
CONV
TX
f2
PA
BPF
PA BPF
17
Comparison of network system
Infrastructur
e&
maintenance
costs
Signal
quality
SFN timing
adjustment
Saving of
microwave
frequency
resource
TS transmissionMicro wave/ Fiber
3
1
1
2
IF transmissionMicro wave
2
2
1
2
Broadcast- wave
relay station
1
3
2
(note-1)
1
(note-2)
Network type
(note-1) For Broadcast-wave relay system, the range of transmission timing is
limited.
(note-2) Broadcast wave relay system dose not require micro-wave frequency.
DiBEG
Digital Broadcasting Experts Group
18
Example of Wide KANTO area Network
Transposer
Transposer
FX
Transposer
FX
Studio
Transmitter
：10WTX
：3WTX
：300WTX
FX
：IF TTL
：TS TTL
Tokyo Tower
０
DiBEG
Digital Broadcasting Experts Group
１０
２０
３０
４０ ５０ｋｍ
19
Examples of Microwave STL/TTL (Toshiba)
TS STL/TTL TX
TS STL/TTL RX
-Dual type, seamless switching
-DVB-ASI digital interface
-Equipped automatic multi-path
equalizer
DiBEG
Digital Broadcasting Experts Group
IF TTL TX/RX
-Dual type, TX/RX are installed in 1 rack
-OFDM IF signal interface
-Phase noise compensation technology
with pilot signal
20
Examples of Digital Studio to Transmitter Link for TS Signal
Transmission
(Hitachi KokusaiElectric)
2 channels dual system
・Seamless SHF Output Signal Switching
・DVB-ASI Digital Signal Interface
・High-performance automatic equalizer diminishes multi-path
distortion
DiBEG
Digital Broadcasting Experts Group
21
Example of Optical STL/TTL (Toshiba)
Ratings
„Signal Input:
DVB-ASI
Optical TX
Optical RX
„Output Wave Length: 1.5um band
„Output Power:
+6dBm
„Transmission Bit Rate: 33.464Mbps
DiBEG
Digital Broadcasting Experts Group
22
(3) Trans-poser of Digital Terrestrial Broadcasting
And new technology
(a) Conceptual Block diagram
Output to input coupling(SFN)
Broadcast-wave(UHF)
or TTL
Multi-path and
Interference
TX antenna
Receiver
&
Converter
Power
Amp. (note)
(note) to save the cost, common amplifier is expected
(b) Key factors of digital terrestrial trans-poser
1. To reduce the cost, common wideband amplifier for plural channel is
expected
2. In some cases, degradation caused on transmission link should be
improved (Multi-path, interference canceller, diversity reception, etc)
3. For SFN, receiving and transmitting frequency is same, coupling of
input and output should be decreased (coupling loop canceller)
(c) Examples of Hardware; see following pages
DiBEG
Digital Broadcasting Experts Group
23
Examples of Digital Transposer (NEC)
30W x 3-channels common amplification System
Features
1) Excellent IM (less than -50dB) using Feedforward technology.
2) MCPA (Multi Channel Power Amplifier) is available.
No required of Channel combiner, especially, in
the case of adjacent channel transmitting.
3) END (Equivalent Noise Degradation) improving
equipment for on air receiving system is provided.
- Loop canceller
- Diversity receiver
- Noise reduction (Re-mapping) Equipment.
DiBEG
Digital Broadcasting Experts Group
24
Examples of Digital Transposer (Toshiba)
TS-TTL 3W TX
DiBEG
Digital Broadcasting Experts Group
TS-TTL 50W TX
25
Signal quality compensate equipment
for Terrestrial Digital Broadcasting Relay Station
MODEL AS-D860 (Panasonic).
Multipath and Fading
Interference
Receiver 1
AS-D813
Receiver 2
AS-D813
Diversity
AS-D860
Feature
Transmitter Power AMP
AS-D813
AS-D830
Relaying Equipment
★ Signal quality degradation by the multipath and fading is compensated.
★ Adopted to maximum-ratio-combined method.
★ Miniaturization Size : 480mm(W)×400mm(D)×50mm（H)
DiBEG
Digital Broadcasting Experts Group
26
(4) Peripherals
(a) Peripherals for digital transmitter system
Peripherals for digital transmitting system are quite different from the
ones for analog system. Many types of peripherals for digital have
been developed and commercialized
Frequency
Standard
OFDM
MOD
Up
Conv.
Transmitter
Receiver
Signal
Generator
(TS)
Signal
Generator
(OFDM)
Station
Monitor
RF signal
Measuring
instrument
Field
Monitor
(b) Examples of Hardware; see following pages
DiBEG
Digital Broadcasting Experts Group
27
OFDM FIELD ANALYZER
MODEL 5287
(NITSUKI)
Multipath
Interference
Feedback
Analogue
Various measurement function
enables predicting recieving
obstacle in the field.
5287
Digital
Repeater
5287
VIDEO
MPEG
Decoder AUDIO
Monitor
＊Equipped with built-in very low noise UHF all channel down converter.
＊Output MPEG2-TS from demodulated OFDM signal.
＊Measured results are displayed on LCD and can be stored in memory card.
＊Displays transmission parameters at each hierarchical level, according to TMCC information.
＊In case measured value exceed normal range, alarm signal will be issued.
28
(Japan Communication Equipment Co.,Ltd. ”Nitsuki”)
DiBEG
Digital Broadcasting Experts Group
Introduction of measuring instrument for digital
broadcasting
MS8901A(Anritsu)
Digital Broadcast Signal Analyzer
This is a digital broadcasting signal analyzer
that makes the base of high performance
Spectrum Analyzer (9kHz~3GHz). Using Highspeed DSP , and you will be able to do some
diverse measuring functions by installing the
measurement software.
【Transmitter test solution】
MS8911A(Anritsu)
Digital Broadcast Field Analyzer
MS8911A is a suitable and optimal measuring
instrument for Digital Broadcasting Signal
Wave (ISDB-T). This has the most advanced
ultra-portable spectrum analyzer on the market,
featuring unparalleled performance and size at
a modest price.
【Field measurement solution】
MS8901A
GPIB
DiBEG
Digital Broadcasting Experts Group
Digital terrestrial
Transmitter
Digital
station
Broadcasting
No.MC-X2DBA1173-00
29
3. ISDB-Tsb; Terrestrial Sound Broadcasting
(Family of ISDB-T)
Features of ISDB-Tsb
(1) What is ISDB-Tsb
ISDB-Tsb transmission system is unique in ISDB-T family. This transmission system
has been standardized for narrow band ISDB-T transmission system, which is
focused to audio and data service, therefore, called ISDB-Tsb.
(2) Commonality with ISDB-T
(a) Same segment transmission construction. But ,considering narrow band
reception, only 1 segment and 3 segment transmission systems are standardized
(b) Adopt same transmission parameters as ISDB-T.
(c) Commonality of 1 segment receiver with ISDB-T partial reception
(3) Efficient use of frequency resource
(a) Consecutive transmission system. This system is unique for ISDB-Tsb, this
transmission system is to transmit plural channel without guard band
(b) To achieve consecutive transmission, phase compensation technology at
transmitter side is adopted
DiBEG
Digital Broadcasting Experts Group
30
Trial Services of DRP
VHF television band assignments
2MHz(Overlapping)
VHF 6ch
VHF 8ch
VHF 7ch
(Not
use)
6MHz
188MHz
Segment structure
1
2
4MHz
3
4
192MHz
5
6
7
8
8 segments
(Normally 13seg.)
3seg. broadcasting
Broadcast
programs
91ch 92ch 93ch 94ch 95ch
97ch
Above example is Tokyo station , Osaka's all programs are 1seg. broadcasting.
DiBEG
Digital Broadcasting Experts Group
31
Efficient use of frequency resource
(Flexibility of channel plan)
For ISDB-Tsb transmission system, any type as follows
are available according to usable bandwidth
1 segment type
3 segment type
For narrow band
channel plan
430kHz
1290kHz
(One channel in One band)
430X N kHz
For wide band
channel plan
Example; N=8
(note)
(Consecutive transmission system)
5x (1segment
channel)
1x (3segment
channel)
(6 channel{5x(1 seg)+1x(3 seg)} in one band)
(note) Any number of segment(up to 13) are available
DiBEG
Digital Broadcasting Experts Group
32
Commonality with ISDB-T
(Digital radio/digital TV compatible receiver)
DTTB (UHF)
13 segment (partial reception operation)
DTV receiver
(VHF+UHF)
TV
DTSB (VHF)
8 segment system
3 segment receiver
(VHF+UHF)
Radio
3segments
DTSB (VHF)
8 segment system
1 segment receiver
(VHF+UHF)
Radio
DiBEG
Digital Broadcasting Experts Group
1segment
33
Block diagram of the Digital Terrestrial Sound
Broadcasting system in Japan
Consortium (DRP)
Seg 1
Studio
Re-MUX
FEC
Studio
Re-MUX
FEC
Re-MUX
FEC
Seg 2
OFDM
MOD.
TX
Seg n *)
Studio
note) n=6 for Tokyo (1seg x 5 + 3seg x 1 = 8 segments )
n=8 for Osaka (1seg x 8 = 8 segments )
DiBEG
Digital Broadcasting Experts Group
34
DRP Infrastructure for ISDB-Tsb(1/3)
DRP Tokyo master rack room
DiBEG
Digital Broadcasting Experts Group
35
DRP Infrastructure for ISDB-Tsb(2/3)
DRP Tokyo digital radio transmitter room
DiBEG
Digital Broadcasting Experts Group
36
DRP Infrastructure for ISDB-Tsb(3/3)
Antenna
DTTB transmission
Antenna(UHF band)
MX TV
antenna
Digital radio
Transmission
Antenna
DiBEG
Digital Broadcasting Experts Group
Special
observation deck
37
Examples of ISDB-Tsb Receiver
KDDI supports the diffusion of ISDB-Tsb service/receiver strongly
W51T
(TOSHIBA)
W44S
W52T
(TOSHIBA)
(SONY ERICSSON)
DiBEG
Digital Broadcasting Experts Group
W51SH
(SHARP)
38
- Presented by KDDI -
ISDB-T Seminar in Manila
Salamat po!
Thank you!
Digital Broadcasting Expert Group
http://www.dibeg.org/
mail; info@dibeg.org
DiBEG
Digital Broadcasting Experts Group
39