OneSeg

1
One-Seg Mobile broadcasting

• Masami Fujita
• Japan Broadcasting Corporation (NHK)

Submission Date July 8, 2008
2
Highlight of Current Activities (1)

• Digital Terrestrial TV service in Japan
• On December 1, 2003, Japan launched digital
  terrestrial television broadcasting (DTTB) using
  the Integrated Service Digital Broadcasting -
  Terrestrial (ISDB-T) transmission system.
• ISDB-T is recommended in Rec. ITU-R BT.1306.
• ISDB-T is robust transmission system because it
  uses OFDM and time interleaving.
• One-Seg
• One-segment services for handheld receivers
  (called One-Seg) can be provided simultaneously
  with one 6MHz TV channel, in addition to HDTV (or
  multi-channel SDTV).
• On April 1, 2006, One-Seg services began in
  Japan.
• More than 30 million One-Seg receivers have been
  shipped so far.
• Various kinds of One-Seg receivers are available
  on the market.
• One-Seg is provided free of charge.

to slide 8,9
3
Highlight of Current Activities (2)

• BST-OFDM technology
• NHK developed the Band Segmented Transmission
  OFDM (BST-OFDM) technology for ISDB-T in 1996.
• ISDB-T consists of 13 OFDM segments.
• The system supports hierarchical transmissions of
  up to three layers, and parameters can be
  changed in each layers.
• Typically we use two layers. One is a layer for
  HDTV with 12 segments using 64QAM, and the other
  is a layer for One-Seg with 1 segment using QPSK.
• Example of Information bit rate is 16.85Mbps (for
  HDTV) and 416kbps (for One-Seg).
• Features of One-Seg
• Not only video audio, but data, closed caption,
  and Electric Program Guide are transmitted in
  One-Seg.
• One-Seg is a new medium that realizes the
  convergence of broadcasting communications on
  the mobile terminal.

to slide 10,11
4
Strategic Direction

• Termination of Analog TV services
• Plans call for digital terrestrial broadcasting
  to reach all homes in Japan by July 2011.
• By July 2011, both analog terrestrial and
  satellite broadcasting are scheduled to be
  terminated.
• At this point, Japan will have completed the
  transition to all-digital TV broadcasting.
• Digital Radio
• Digital terrestrial radio (DR) test transmission
  started in October 2003.
• Programs are transmitted by the Digital Radio
  Promotion Association (DRP), a licensed
  broadcasting corporation run jointly by NHK,
  several commercial radio stations, etc.
• DR uses a vacant VHF TV channel (CH-7) for the
  test transmission.
• ISDB-TSB (Sound Broadcasting) transmission system
  is adopted for DR.

to slide 12,13
5
Challenges

• Recent topics in One-Seg
• Independent program service
• It is possible to broadcast independent program
  service in One-Seg (non-simultaneous program to
  12 segments) from April 2008 by legal changes.
• NTV started to broadcast independent One-Seg
  test service for sports programs.
• NHK announced the start of independent One-Seg
  service using educational channel from April
  2009.
• Multi-channel service in One-Seg
• It is possible to send up to 3 programs in
  One-Seg.
• TOKYO MX started 2 programs One-Seg service when
  they broadcast multi-channel service from June
  2008.
• Research Development in One-Seg
• NHK have been developing Connected One-Seg
  Re-transmission System.
• NHK have been developing Automatic Activation of
  One-Seg Receivers by emergency warning broadcast
  system. (See slide 20,21)

6
Next Steps/Actions

• VHF/UHF rearrangement after analog TV termination
• Frequency bandwidth for terrestrial television
  will be reduced from 370MHz to 240MHz.
• VHF Low (18MHz) VHF High (14.5MHz) will be
  allocated for non-TV broadcasting services.
  (e.g., Multimedia broadcasting for mobile
  receivers)
• Multimedia broadcasting for mobile receivers
• Theres a chance to start new multimedia
  broadcasting services for mobile receivers with
  VHF Low VHF High.
• ISDB-TSB, ISDB-Tmm (Mobile Multimedia), etc are
  now under consideration for new services.
• One-Seg, ISDB-TSB, and ISDB-Tmm are all ISDB-T
  family that introduce the BST-OFDM technology.
  (See slide 22)
• VHF Low would be assigned for local services, and
  VHF High would be assigned for national services
  according to the report about the multimedia
  broadcasting.
• The report said it is necessary to fix the
  industries that will provide new services by the
  middle of 2010 to start broadcasting after July
  2011.
• ARIB is now preparing for the new download
  services for multimedia broadcasting.

to slide 14
7
Supplemental Slides
8
Number of receivers- Digital Terrestrial TV
service in Japan / One-Seg -
Number of receivers of Digital terrestrial
broadcasting Mobile phone with One-Seg tuner
million
More than 30,000 million One-seg receivers
Japan Electronics and Information Technology
Industries Association, etc
Digital terrestrial broadcasting
12/2003
One-Seg service
4/2006
1 Digital television Terrestrial digital tuner
Cable digital STB ( Total number of
Television about 115 million, 7/2007 )
2 Mobile phone with One-Seg tuner ( Total
number of Mobile phone 103 million, 4/2008 )
9
One-Seg receivers- Digital Terrestrial TV
service in Japan / One-Seg -
to slide 3
Car Navigators
Mobile Phones
PCs with One-Seg
Portable Dictionary
Portable Games
USB type One-Seg tuners
Portable Players
(From Homepage)
10
12 Segments 1 Segment (ISDB-T) - BST-OFDM
technology / Features of One-Seg -
13 Segments , Channel Bandwidth 5.57MHz
HDTV
12 Segments
12 Segs
1 Seg
On-air program
1 Segment
Data service
(6/14 MHz)
64QAM FEC 3/4 (16.851Mbps)
QPSK FEC 2/3 (416kbps)
11
Convergence of Broadcasting Communications -
BST-OFDM technology / Features of One-Seg -
to slide 4
Broadcasting
Communications
Convergence
Watch TV
Internet
TV Internet
TV Data
Broadcasting station
Broadcasting station
BML
BML
BML, HTML
Watching TV program and reading data on TV
Watching TV program on full screen
Watching TV program and reading data on the
Internet
Viewing or reading on the Internet
12
Timeline of Digital Broadcasting services-
Termination of Analog TV services / Digital Radio
-
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2012
2011
will be over 7/2011
Analog SD
Terrestrial
12/2003
Digital
One-Seg
4/2006
will be over 7/2011
Analog SD
was over 10/2007
Satellite
Analog HD
Digital
12/2000
Test transmission
Digital Radio
10/2003
24/7/2011
13
ISDB-TSB (Digital Radio)- Termination of Analog
TV services / Digital Radio -
13 Segments , Channel Bandwidth 5.57MHz
ISDB-TSB (Sound Broadcasting)
to slide 5
Digital Radio test transmission started from
10/2003 (8 segments, VHF 7ch)
TS1
TS2
TS3
TS4
TS5
TS6
TS7
TS8
TS9
TS10
TS11
TS12
TS13
1 Seg
1 Segment
??????
3 Segments
Video ?
Data service
TS1
TS2
QPSK FEC 1/2 (330kbps)
Image
? NHK will start video services from July 2008
1 3 Segments are used in ISDB-TSB
14
Rearrangement of VHF/UHF- VHF/UHF rearrangement
after analog TV termination -
90-108MHz 13ch
170-222MHz 412ch
470-770MHz 1362ch
to slide 6
Now
Analog TV Broadcasting
Analog TV Broadcasting
Analog TV Broadcasting Digital TV Broadcasting
18MHz
52MHz
300MHz
470-710MHz 1352ch
715-725MHz
730-770MHz
90-108MHz
170-202.5MHz
207.5-222MHz
Future Plan
Digital TV Broadcasting
(1)
(2)
(1)
(3)
(4)
18MHz
32.5MHz
240MHz
14.5MHz
10MHz
40MHz
(VHF Low)
(VHF High)
GB 5MHz
GB 5MHz
(GB 5MHz)
(1) Non TV Broadcasting gt e.g., Multimedia
broadcasting for mobile receivers (2) Private
Telecommunication (Protection against disasters,
etc) (3) Intelligent Transport Systems (4)
Telecommunications
Schedule plan (1) (2) after July 25, 2011 (3) (4)
after July 25, 2012
15
Chipset of One-Seg receiver- One-Seg -
Example of One-Seg receivers Chipset
Dimensions 9mm9mm1.4mm Sensitivity -109.6dBm
-105.2dBm Power consumption 77mW 105mW
SHARP documents
16
12 Segments 1 Segment (ISDB-T) - BST-OFDM
technology -
Example parameters for digital terrestrial
television broadcasting
?1 Example Video (224kbps), Audio (55kbps),
Data (80kbps), Closed caption (5kbps), EPG
(20kbps), Control (32kbps)
?2 Spectral Band Replication
17
Configuration of Digital transmission - BST-OFDM
technology -
12 segs
Source coding
Channel coding
12 segs
12 segs
Video coding
Video
Audio coding
Energy dispersal
Delay compensation
Byte interleave
Inner code
Bit interleave
Mapping
Audio
Data/ EPG coding
Data/EPG
Layer synthesis rate conversion
Multiplexing Conditional Access
TS Re-Mux
Outer code (RS)
Hierarchical separation
Time interleave
Frequency interleave
1 seg
1 seg
Source coding
Video coding
Video
Energy dispersal
Byte interleave
Inner code
Bit interleave
Mapping
Delay compensation
Audio coding
Audio
Data/ EPG coding
Data/EPG
1 seg
D/A
Up converter
Power Amp
Antenna
IFFT
Guard interval addition
Pilot
OFDM frame configuration
TMCC
Aux channel
18
Digital Radio- Digital Radio -
Tokyo area
Osaka area
2.4kW
240W
DRP homepage
Digital Terrestrial Radio test transmission
started in October 2003, using a vacant VHF TV
channel (CH-7). Programs are transmitted by the
Digital Radio Promotion Association (DRP), a
licensed broadcasting corporation run jointly
by NHK, several commercial radio stations in
Tokyo and Osaka, and some new entrants into the
digital radio market.
Digital Radio receiver (KDDI)
(About 1.8 million receivers, 6/2008)
19
Multi-channel service in One-Seg- Recent topics
in One-Seg -
One-Seg 1
One-Seg 2
TOKYO MX homepage
20
Connected One-Seg Re-transmission System-
Research Development in One-Seg -
NHK developed a "connected One-Seg
re-transmission system" that extracts One-Seg
signals from the digital terrestrial
broadcast-waves received from individual
broadcasters and combines them into a single
signal for re-transmission over a channel that is
different from any of the receiving channels.
A maximum of thirteen One-Seg signals can be
re-transmitted. It will be possible to offer
community broadcasting localized to a particular
area for re-transmission, in addition to
One-Seg services from every broadcaster.
ch1
ch2
ch3
ch4
ch5
ch7
ch8
ch6
ISDB-T
Air
Frequency
Combines only One-Seg signals
aboveground
underground
Connected One-Seg re-transmission system
Community One-Seg signals
ch9-13
Re-transmission
6MHz
Frequency
ch9
ch10
ch11
ch12
ch13
ch8
ch4
ch6
ch1
ch3
ch5
ch7
ch2
21
Automatic Activation of One-Seg Receivers by
EWS- Research Development in One-Seg -
The EWS (Emergency Warning broadcast System)
automatically activates receivers when a
disaster happens, such as an earthquake or
Tsunami. NHK developed EWS compatible adaptor
that can be connected to a One-Seg receiver. The
low power consumption achieved by performing
intermittent reception of the One-Seg
activation flag, which is transmitted
approximately every 0.2 seconds, showed the
prospect of continuous standby operation for
about two weeks without recharging.
Among the 432 carriers used for One-Seg
service, four carriers transmit the activation
flag for emergency warning broadcasting.
Increasing this to all four carriers, from the
previously used two carriers that transmitted
the activation flag signal, improved reception
sensitivity without increasing power
consumption. NHK will work toward the actual
implementation of One-Seg and radio receiver
with the EWS reception function.
Prototype of EWS adaptor
22
ISDB-Tmm - Multimedia broadcasting for mobile
receivers -
ISDB-Tmm (Mobile Multimedia) is new multimedia
broadcast method that is based on the ISDB-T
international standard. The features of
ISDB-Tmm is flexible structure of segments. It
is possible to download the contents through the
air. MMBP (MultiMedia Broadcasting Planning LLC)
was created in December 2006 for the purpose
of surveying and researching new mobile
multimedia broadcast technologies and business
models. MMBP started field testing of ISDB-Tmm in
March 2008 using the Tokyo Tower.
Demonstration of ISDB-Tmm
ISDB-T, ISDB-TSB, ISDB-Tmm
Impress AV Watch
23
Basic transmission parameters
Basic transmission parameters for terrestrial
digital television broadcasting
24
ARIB standards, ITU-R recommendations
ARIB standards and ITU-R recommendations for
ISDB-T
25
Example of data broadcasting in One-Seg
MobiTreasure
The emblem are hidden in a program
Take the emblem into treasure box. ?
recorded to NVRAM
Discover the emblem !
MobiTreasure is a treasure-hunt game that employs
the most important feature of One-Seg services,
i.e., seamless integration of data broadcasting
and the Internet.
26
Example of mobile VOD using closed caption as
metadata.
Example of mobile VOD through the internet using
closed caption as metadata
It enables users to search by keywords.
Keywords Pitch Shot
(3) Viewing
User can view a video clip from the point he
clicks.
User can scroll through the text of program
stories like a electric book.