Post on 30-Dec-2015
transcript
Halifax, 31 Oct – 3 Nov 2011 ICT Accessibility For All
ARIB Standardization Activities on ARIB Standardization Activities on Multimedia Broadcasting for Multimedia Broadcasting for
Mobile TerminalsMobile Terminals
Tomoyuki OhyaTomoyuki Ohya
ARIB (mmbi, Inc.)ARIB (mmbi, Inc.)
Document No:
GSC16-GRSC9-03
Source: ARIB
Contact: Tomoyuki Ohya (mmbi, Inc.) ohya@mmbi.co.jp
GSC Session:
GRSC9
Agenda Item:
4.3
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Highlight of Current Activities(1)Highlight of Current Activities(1)• Digital TV Switchover in Japan
– Analog terrestrial TV broadcasting terminated on 24th July, 2011, except for three North-Eastern prefectures (to be terminated by 31st March, 2012)
– Using the vacant VHF spectrum, ISDB-T based multimedia broadcasting for mobile terminals will be launched:
• VHF-L (90-108MHz): Local Block are (ISDB-Tsb: ARIB STD-B29)• VHF-H (207.5-222MHz): Nationwide area (ISDB-Tmm)
• Standards Completed– “Mobile Multimedia Broadcasting System WG” in ARIB has been
working on establishing related standards since November, 2009
– Nine ARIB STDs (B10, B25 Part4, B32, B38, B45 Part 2, B46, B53) are either newly created or modified to support ISDB-Tmm (published in March 2011)
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Highlight of Current Activities(2)Highlight of Current Activities(2)• Operational Guidelines Completed
– ARIB TR-B33: “Operational Guidelines for Terrestrial Mobile Multimedia Broadcasting by Transmission System Based on Connected Segments” was published in March, 2011
– The operational guidelines document is maintained by “ISDB-T Multimedia Forum”
• Harmonization with ITU-R standardization– ISDB-T based multimedia broadcasting is standardized in ITU-R
BT-1833: “Broadcasting of multimedia and data applications for mobile reception by handheld receivers”, as Multimedia System “F”
– File based broadcasting defined in ARIB STD-B45 Part 2 is also standardized as ITU-R BT-1888: “Basic elements of file-based broadcasting systems ”
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Strategic DirectionStrategic Direction
• Commercial Service in Japan– ISDB-T based VHF-H multimedia broadcasting
(Mobacas) to be launched in April, 2012
• Activities towards the global harmonization– Physical layer parameters for 6/7/8 MHz bandwidth
were already defined in ARIB STD-B46 and ITU-R BT.1306
– New recommendations on the emission system and the planning criteria for terrestrial multimedia broadcasting for mobile reception using handheld receivers in the VHF/UHF band are under discussion in ITU-R (BT.[ETMM] and BT.[ETMMPLAN])
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ChallengesChallenges• Coexistence / Competition with other visual contents
services such as:– One-seg services
– On-demand video services over communications channels
• Key success factors for mobile DTV– Providing open technical information to the industry for rapid
terminal penetration
– Preparation for wide radio coverage area
– Collaboration of communications and broadcasting services• Reliable reception of high quality programs is possible using
communications channels to supplement data which cannot be received over broadcasting channels
• New broadcasting programs collaborating with bi-directional services, such as social networking services
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Next Steps / ActionsNext Steps / Actions
• Continue to contribute to establishing / improving standard documents in ARIB and ITU-R
• Expecting commercial service launch in April, 2012
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Supplementary SlidesSupplementary Slides
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Storage type Services (File Download)
Storage type Services (File Download)
Live Concerts
Live News
Sports game
Movie/Drama
NewspapersAudio file
Novels
E-Magazine
Real time Services (Streaming)Real time Services (Streaming)
Enjoy live programs such as sports, news, and music.
Enjoy live programs such as sports, news, and music.
Various typesof contents
Various typesof contents
■ Viewers can watch live videos just like conventional mobile television in much better quality.
■ Various types of contents can be automatically downloaded into storage on mobile handsets.
Automatically stored to your mobile handsetsAutomatically stored to your mobile handsets
Can be used anytimeanywhere
Can be used anytimeanywhere
ISDB-Tmm system seamlessly provides both Storage type (download) services and Real time (streaming) services in a single allocated bandwidth.
ISDB-Tmm ServicesISDB-Tmm Services
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GSC16-GRSC9-03Technical specifications of ISDB-TmmTechnical specifications of ISDB-Tmm
ISDB-Tmm (Ref.) ISDB-T(Digital Terrestrial TV, Oneseg)
Spectrum Usage
Bandwidth / segment (Bws)
6000 / 14 = 428.57 kHz, 7000/14 = 500 kHz, 8000/14 = 571.428 kHz
Number of radiated carriers / segment
108 (Mode 1), 216 (Mode 2), 432 (Mode 3)
Modulation OFDM (DQPSK, QPSK, 16QAM, 64QAM)
Forward Error Correction Outer Code: Reed Solomon (204, 188)Inner Code: Convolutional Code (7/8, 5/6, 3/4, 2/3, 1/2)
Hierarchical Transmission Possible
SFN Operation Possible
13-seg formatISDB-T
ARIB STD-B31 / ITU-R BT1833
1-seg formatISDB-TSB
ARIB STD-B29 / ITU-R BT1833
Any combination of 13-seg/1-seg format
6/7/8MHz (13 segments)
Oneseg Partial Recepti
onHDTV
e.g. 2-layer Hierarchical Reception (including partial reception)
†6MHz bandwidth is specified in ARIB STD-B31
† † 6/7/8MHz bandwidth is specified in ITU-R BT-1306
†6MHz bandwidth is specified in ARIB STD-B31/B29
† † 6/7/8MHz bandwidth is specified in ITU-R BT-1306
6/7/8MHz
Partial Recepti
on
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GSC16-GRSC9-03Technical specifications of ISDB-Tmm (cont.)Technical specifications of ISDB-Tmm (cont.)
ISDB-Tmm (Ref.) ISDB-T(Digital Terrestrial TV, Oneseg)
Active symbol duration
6MHz , 7MHz, 8MHz252 μs, 216 μs, 189μs (Mode 1)504 μs, 432 μs, 378μs (Mode 2)
1008 μs, 864 μs, 756μs (Mode 3)
Carrier spacing (Cs) 6MHz , 7MHz, 8MHzBws/108 = 3.968kHz, 4.629kHz, 5.271kHz (Mode 1)Bws/216 = 1.984kHz, 2.361kHz, 2.645kHz (Mode 2)Bws/432 = 0.992kHz, 1.157kHz, 1.322kHz (Mode 3)
Guard interval duration
1/4, 1/8, 1/16, 1/32 of active symbol duration63, 31.5, 15.75, 7.875 μs (Mode 1: 6MHz)126, 63, 31.5, 15.75 μs (Mode 2: 6MHz)252, 126, 63, 31.5 μs (Mode 3: 6MHz)
Transmission frame duration
204 OFDM symbols
Inner interleaving Intra and inter segments interleaving (frequency interleaving). Symbol wise convolutional interleaving 0, 380, 760, 1520 symbols (time interleaving)
Outer interleaving Byte wise convolutional interleaving, I = 12
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GSC16-GRSC9-03Licensed Spectrum for Multimedia Broadcasting in JapanLicensed Spectrum for Multimedia Broadcasting in Japan
After reallocation of the licensed spectrum for analog terrestrial TV , 207.5-222MHz band (14.5MHz) will allocate for mobile multimedia broadcasting.
1 segment type: 7 slots total
Total:33 segments
13 segments Type13 segments Type
Before Reallocation( ~ 2012.7)
After Reallocation(2012.7 ~ )
Analog TV1~ 3ch
Analog TV4~ 12ch
90MHz 108MHz 170MHz222MHz
Multimedia Broadcasting (V-Low)
90MHz 108MHz 170MHz 222MHz207.5MHz
Public Safety and Homeland Security Band
Nation wide Multimedia Broadcasting (V-High)
202.5MHz
Gu
ard
b
an
d
Reallocation of Licensed Spectrum Reallocation of Licensed Spectrum
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GSC16-GRSC9-03Multimedia Broadcasting System ModelMultimedia Broadcasting System Model
Programming/Contents
Management System
Content Complement Server Broadcast System
Communication System
Meta-data System
CAS/DRM System
File Delivery System
Streaming Playout System
Multiplexer
Broadcast Network
Communication Network
-Contents
-License/Key Information-Contents Complement
Contents Export
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ISDB-Tmm
3G/LTE
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GSC16-GRSC9-03ISDB-Tmm Protocol StackISDB-Tmm Protocol Stack
Contents for real- time service PSI/SI Contents for
file download service ECG/EPG metadata
PES Section
FLUTE / AL - FEC
UDP / IP / ROHC
ULE
MPEG -2 TS
ISDB- Tmm physical layer
Real-time service File download service
SI: Service informationPSI: Program specific information
EPG: Electronic program guideECG: Electronic contents guidePES: Packetized elementary streamFLUTE: File delivery over unidirectional transport
AL- FEC: Application layer – forward error correction
UDP: User datagram protocolIP: Internet protocolROHC: Robust header compressionULE: Unidirectional lightweight encapsulation
TS: Transport stream
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ISDB-TmmISDB-Tmm Technical FeaturesTechnical Features
(1) High Quality Media Coding•ITU-T H.264 / MPEG-4 AVC•MPEG HE-AAC, MPEG Surround
(2) Advanced Inter-media Interaction•Interaction between communications and broadcasting
(3) High Efficiency File Delivery Protocol•Efficient File Transmission for Mobile Environments with AL-FEC•Lost data in broadcast channel can be compensated with communication channels
(4) Advanced Power Saving Mechanism•Partial segment reception is supported•Intermittent reception for file download is supported by using advanced meta-data
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Real Time Services (Streaming)
Real Time Services (Streaming): Advanced Profile/Level Support. Higher resolution video.Storage Type Services (Download): Support of High-Definition video.
Codec Profile Level Resolution Frame Rate
: ITU-T H.264/MPEG-4 AVC: Main: 3: 720×480(VGA+): 30 frame/sec
High Quality Media Coding (Visual)High Quality Media Coding (Visual)
Ref.: One Seg (TR-B14)
Codec : ITU-T H.264
Profile : Baseline
Level : 1.2
Resolution : 320x240 (QVGA)
Frame Rate : 15 frame/sec
Storage Type Services (Download)
: ITU-T H.264/MPEG-4 AVC: High: 4.2: 1920×1080(1080HD): 60 frame/sec
Codec Profile Level Resolution Frame Rate
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QVGA
VGA+
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ISDB - Tmm Real Time Services (Streaming)
•High efficiency stereo audio broadcasting by using HE-AACv2•Home theater like multi channel audio support by MPEG Surround
Codec Audio Channel
: MPEG HE-AACv2 Surround: Monaural / Stereo / 5.1ch
Stereo Monaural
Surround
High Quality Media Coding (Audio)High Quality Media Coding (Audio)
Ref.: One Seg (TR-B14)
Codec : AAC+SBR (eq. HE-AAC v1)
Audio Channel : 2 (maximum)
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GSC16-GRSC9-03Advanced Meta-data UsageAdvanced Meta-data Usage
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• ISDB-Tmm introduces advanced meta-data for both realtime broadcasting (EPG: Electric Program Guide) and storage type broadcasting (ECG: Electric Contents Guide)
• Rich program description is possible by the advanced meta-data
• Flexible charging mechanism is provided by meta-data licensing information, such as:
- Group pricing (for series of contents)- Discount coupon (for promotion)- Rich description of the content license is included in the meta-data
• Meta-data is transmit efficiently by AL-FEC protection
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• Support of flexible inter media interaction among Web/E-mail/Real Time Services(Streaming)/Storage Type Services(Download)
Web Browser
Streaming
Download
Advanced Inter-media InteractionAdvanced Inter-media Interaction
media: DTVTR-X.jp?p_channel=0001 &service_id=0001 &stime=2005-04-1T10:00:00 &title=%82%C4%B7%82%C6 &provider_name=%8B%9F%8B %8B%8E%D2%96%BC
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0 100 200 300 400 500 6000
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
10 20 30 40 50 60
Packet Error Rate (%)
Rec
eive
Suc
cess
Rat
e
AL-FEC
・ 10 MByte File Transmission・ 1,000 byte/packet・ FEC rate = 1/2 (AL-FEC)・ Repetition=2 (Carousel)
•High efficiency file broadcasting protocol with application layer forward error correction (AL-FEC)
High Efficiency File Delivery ProtocolHigh Efficiency File Delivery Protocol
ISDB-Tmm
AL-FECDSM-CC Carousel
A
A
A
A-1
A-2
A-3
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GSC16-GRSC9-03File Delivery ProceduresFile Delivery Procedures
2020
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・・・
・・・ FEC Packet
・・・
・・・
・・・
・・・
UDP/IP Header
CRC32ULE Header
・・・
TS Header
188 Byte
Contents(Arbitrary Length)
File Segmentation
FEC Packet Generation
LCT Header, FEC Payload ID
FLUTE(File Delivery Protocol)
UDP/IP
ROHC(Header Compression)
ULE(Encapsulation)
IP over MPEG-2(TS Packet)
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• When the content delivered over the broadcast channel is incomplete, the missing data can be compensate using communications channel.
• The terminal issues HTTP request, which is commonly used in communications network and has higher flexibilities.
• Complementation schedule is either:- At the time user uses the content (manual compensation) or- Controlled by meta-data associated with the content (automatic
compensation)
・・・・・・ ・・・・・・
Data Complementation Request
Complementary Data・・・・・・ ・・・・・・
Data Broadcast
Receive & Store
Complementation
Broadcast
Communications
Communications
Missing Data
・・・・・・ ・・・・・・・・
・・・・・・ ・・・・・・・・
Content Complementation by Communications Content Complementation by Communications ChannelChannel
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13 segment1 segment
Frequency Frequency
time
•Large amount of data: High-speed immediate receiving with full segment receiver
•Small amount of data: Narrow-band low power consumption with one segment receiver
time
Contents AContents BContents CContents DContents EContents F
•Minimum wake-up scheduling for power saving with transmission control metadata
EPG/ECG Meta-data (Program) Transmission Control Meta-data
•Detailed control data for file retrieval, such as, broadcasting schedule, number of repetition, etc.
time
Contents (1st transmission)Wake-up
Sleep
Contents (2nd transmission) If missing 1st transmission
Receiver Wakeup Scheduling
Advanced Power SavingAdvanced Power Saving
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GSC16-GRSC9-03Contents RecommendationContents Recommendation
Recommend Engine
User Attributes
(1) Contents usage information
(3) Receiving Recommend Information (list of contents IDs)
(4) Storage of recommended contents, or highlighted display of recommended contents on ECG
Recommend Server
(2) Recommend Information Generation
• Contents recommendation is a key technology for users to efficiently navigate through large number of contents
• Recommendation information is provided through communications channel
• User terminals automatically schedule download on broadcast channel
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△Call for Proposal
2006 2007 2008 2009 2010 2011 2012
△Sin
△License Granted for System Operator(ISDB-Tmm was adapted)Informal Gathering
for Discussion on Multimedia Broadcasting
△MIC Committee Report
△Call for System Proposal
△Technical Requirements(MediaFLO andISDB-Tmm)
Broadcasting System Committee
△Analog TV Shutdown
Time-table of ISDB-TmmTime-table of ISDB-Tmm Technical SpecificationsTechnical Specifications
△Multimedia
Broadcasting Working Group
ARIB
Ministry of Internal Affairs and
Communications
△STD, TR
ISDB-T Multimedia Forum △Release
Technical ReportWorking Group
Today
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ISDB-T Multimedia Forum is an organization dedicated to researching new broadcasting services that utilize the ISDB-T format, in order to contribute to the advancement of digital broadcasting in Japan. The forum also promotes the benefits of mobile multimedia broadcasting, which will continue to use the available VHF frequency band after analog broadcasting has ended.
Steering Board Members
ISDB-TISDB-T Multimedia ForumMultimedia Forum
Fuji Television Network, Inc., NIPPON TELEVISION NETWORK CORPORATION, TOKYO BROADCASTING SYSTEM HOLDINGS, INC., ITOCHU Corporation, Sumitomo Corporation, SKY Perfect JSAT Corporation, Multimedia Broadcasting, INC, DENTSU INC., TV Asahi Corporation
91 members as of 31 January 2011
Steering Board
Content Broadcasting Committee
Broadcasting Infrastructure
Committee
Operational Guidelines WG
Core Council
• Drafting operational guidelines document
• Information exchange on broadcasting infrastructure
• Discussions on other issues related to broadcasting infrastructure
• Discussions on preparation for content broadcasting business
• Information exchange among potential content broadcasters
• Discussions on other issues related to content broadcasting business
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GSC16-GRSC9-03Operational Guidelines for ISDB-TmmOperational Guidelines for ISDB-Tmm
Volume
Title Summary
0 Multimedia Broadcasting Operational Guidelines
Explanation for multimedia broadcasting services and technical outlines.
1 Provisions for Download operations Guideline for update receiver software through broadcasting signal (SDTT)
2 Function Specifications for Receiver Units
Description for the functionalities of the receivers.
3 Provisions for Multimedia Coding Multimedia coding guideline for data broadcasting, subtitles, letter on screen and file casting.
4 Provisions for PSI/SI Operations Necessary PSI for receiver station tuning and guideline for SI to get program information
5 Provisions for Conditional Access System(CAS) Operations and Specifications on Receiver Units
Live streaming service: Conditional receiveFile casting service: Conditional playback
6 Not used -
7 Provisions for Carrier Operations Guideline for encoding Video and Audio and Multiplexing for transmission
8 Provisions for Contents Protection Guideline for contents protection (receiver inside protect and signal output protect)
9 Not used -
10 Provisions for Meta Data Operations Guideline for EPG/ECG meta data that receiver display program table
11 Provisions for Storage Type Service Operations
Guideline for data transport of file downloading.
12 Provisions for Storage Contents Supplementation Operations
Guide for a compensation of storage contents via communications channel.
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• ITU-R BT-1306: “Error correction, data framing, modulation and emission methods for digital terrestrial television broadcasting”
• ITU-R BT-1833: “Broadcasting of multimedia and data applications for mobile reception by handheld receivers”
• ITU-R BT-1888: “Basic elements of file-based broadcasting systems”
• ARIB STD-B10: “Service Information for Digital Broadcasting System”• ARIB STD-B25 Part 4: “Conditional Access System Specifications for Digital
Broadcasting”• ARIB STD-B32: “Video Coding, Audio Coding and Multiplexing Specifications for Digital
Broadcasting”• ARIB STD-B38: “Coding, Transmission and Storage Control for Server Type
Broadcasting”• ARIB STD-B45 Part 2: “Contents Download for Digital Broadcasting System”• ARIB STD-B46: “Transmission System Based on Connecting Segments for Terrestrial
Mobile Multimedia Broadcasting”• ARIB STD-B53: “Receiver for Multimedia Broadcasting”• ARIB TR-B33: “Operational Guidelines for Terrestrial Mobile Multimedia Broadcasting by
Transmission System Based on Connected Segments”
Related StandardsRelated Standards
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