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Geneva, 13-16 July 2009 Broadcasting for mobile receivers DOCUMENT #:GSC14-GRSC7-009R1 FOR:Information SOURCE:ARIB AGENDA ITEM:4.2 Mobile Multimedia Broadcast.

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Presentation on theme: "Geneva, 13-16 July 2009 Broadcasting for mobile receivers DOCUMENT #:GSC14-GRSC7-009R1 FOR:Information SOURCE:ARIB AGENDA ITEM:4.2 Mobile Multimedia Broadcast."— Presentation transcript:

1 Geneva, July 2009 Broadcasting for mobile receivers DOCUMENT #:GSC14-GRSC7-009R1 FOR:Information SOURCE:ARIB AGENDA ITEM:4.2 Mobile Multimedia Broadcast & Multicast

2 Geneva, July 2009 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 – ISDB-T is robust transmission system because it uses OFDM and time interleaving. One-Seg – One-segment services for mobile 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 55 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. 2 to slide 8,9

3 Geneva, July 2009 Highlight of Current Activities (2) BST-OFDM technology – NHK developed the Band Segmented Transmission OFDM (BST- OFDM) technology for ISDB-T in – 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 Mbps (for HDTV) and 416kbps (for One-Seg). Features of One-Seg – Not only video & audio, but data, closed caption, and Electric Program Guide (EPG) are transmitted in One-Seg. – One-Seg is a new medium that realizes the convergence of broadcasting & communications on the mobile terminal. 3 to slide 10,11

4 Geneva, July 2009 Strategic Direction Termination of Analog TV services – Plans call for digital terrestrial broadcasting to reach all homes in Japan by July – 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 – Programs are transmitted by the Digital Radio Promotion Association (DRP), a licensed broadcasting corporation run jointly by NHK and several commercial radio stations or other companies. – DR uses a vacant VHF TV channel (CH-7) for the test transmission. – ISDB-T SB (Sound Broadcasting) transmission system is adopted for DR. 4 to slide 12,13

5 Geneva, July 2009 Challenges Recent topics in One-Seg – Independent program service It is possible to broadcast independent program (non- simultaneous program to 12 segments) service in One-Seg from April 2008 by legal changes. NTV started to broadcast independent One-Seg test service for sports programs. NHK started independent One-Seg service using educational channel in April – Multi-channel service 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 in June Research & Development in One-Seg – NHK has been developing Connected One-Seg Re-transmission System. – NHK has been developing automatic activation of One-Seg receivers by the EWS (Emergency Warning broadcast System). (See slide 17, 18) 5

6 Geneva, July 2009 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., Mobile Multimedia broadcasting) Mobile Multimedia broadcasting – Theres a chance to start new multimedia broadcasting services for mobile receivers with VHF Low & VHF High. – VHF Low will be used for Digital Radio broadcasting for local block area and Digital community broadcasting for small area. – ISDB-T SB is now under consideration for new services. – VHF High will be used for a new nationwide area multimedia service. And ISDB-T mm (Mobile Multimedia) is now under development for its services. – One-Seg, ISDB-T SB, and ISDB-T mm are all ISDB-T family that introduce the BST-OFDM technology. – It is necessary to fix the organizations that will provide new services by the middle of 2010 to start broadcasting after July – ARIB is now preparing for the new services for multimedia broadcasting. 6 to slide 14,15

7 Geneva, July 2009 Supplemental Slides 7

8 Geneva, July Shipments of receivers - Digital Terrestrial TV in Japan / One-Seg - million Digital terrestrial broadcasting 12/2003 4/2006 One-Seg service *1 Digital television + Terrestrial digital tuner + Cable digital STB ( Total number of Television: about 117 million, 7/2008 ) Shipments of receivers of Digital terrestrial broadcasting & Mobile phone with One-Seg tuner *2 Mobile phone with One-Seg tuner ( Total number of Mobile phone: 107 million, 4/2009 ) Japan Electronics and Information Technology Industries Association, NHK More than 50 million One-seg receivers 4/2009 One-Seg

9 Geneva, July 2009 One-Seg receivers - Digital Terrestrial TV service in Japan / One-Seg - 9 Mobile Phones Portable Games PCs with One-Seg Car Navigators Portable Dictionary Portable Players USB type One-Seg tuners (From Homepage) to slide 3

10 Geneva, July Segments, Channel Bandwidth : 5.57MHz On-air program Data service 12 Segments 1 Segment HDTV 64QAM FEC = 3/4 (16.851Mbps) 12 Segs1 Seg QPSK FEC = 2/3 (416kbps) (6/14 MHz) 12 Segments & 1 Segment (ISDB-T) - BST-OFDM technology / Features of One-Seg -

11 Geneva, July Watching TV program and reading data on TV Watch TVInternetTV & InternetTV & Data BML Broadcasting station BML Watching TV program on full screen Watching TV program and reading data on the Internet Viewing or reading on the Internet Broadcasting station BroadcastingCommunicationsConvergence to slide 4 BML, HTML Convergence of Broadcasting & Communications - BST-OFDM technology / Features of One-Seg -

12 Geneva, July Terrestrial Satellite Analog SD Digital 12/2003 4/2006 One-Seg Analog SD Analog HD was over 9/ /2000 Digital Digital Radio 10/2003 Test transmission 24/7/2011 will be over 7/2011 will be over 7/2011 Timeline of Digital Broadcasting services - Termination of Analog TV services / Digital Radio -

13 Geneva, July 2009 ISDB-T SB (Digital Radio) - Termination of Analog TV services / Digital Radio Segments, Channel Bandwidth : 5.57MHz Video Data service 1 Segment 1 Seg QPSK FEC = 2/3, GI = 1/16 (440kbps) TS1TS2TS3TS4TS5TS6TS7TS8TS9TS10TS11TS12TS13 3 Segments TS1TS2 Image NHK started video services in July ISDB-T SB (Sound Broadcasting) 1 & 3 Segments are used in ISDB-T SB Digital Radio test transmission started in 10/2003 (8 segments, VHF 7ch) to slide 5

14 Geneva, July 2009 Rearrangement of VHF/UHF - VHF/UHF rearrangement after analog TV termination - 14 Analog TV Broadcasting MHz 1 3ch MHz 4 12ch MHz 13 62ch 18MHz52MHz300MHz 18MHz32.5MHz240MHz14.5MHz10MHz40MHz GB 5MHz MHz 13 52ch MHz MHz MHz MHz MHz GB 5MHz Now Analog TV Broadcasting Analog TV Broadcasting Digital TV Broadcasting Future Plan Digital TV Broadcasting(1)-a(2)(1)-b(3)(4) (1) Non TV Broadcasting (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 (VHF Low)(VHF High)

15 Geneva, July 2009 Rearrangement of VHF/UHF - VHF/UHF rearrangement after analog TV termination MHz14.5MHz Future Plan Digital TV Broadcasting(1)-a(2)(1)-b(3)(4) (VHF Low)(VHF High) (1)-a Digital Radio broadcasting for Local block area & Digital community broadcasting for small area (1)-b Multimedia broadcasting for Nationwide area ISDB-T mm, MediaFLO ISDB-T SB (advanced) Digital Radio test transmission Terrestrial Analog TV broadcasting Telecommunications Council Report License policy Selection of corporations Multimedia Broadcasting ARIB Standard, Technical Report

16 Geneva, July 2009 Rearrangement of VHF/UHF - VHF/UHF rearrangement after analog TV termination - 16 to slide 6 The Telecommunication Council is examining the technical condition of multimedia broadcasting that will use VHF Low & High. VHF Low will be used for Digital Radio broadcasting for local block area and Digital community broadcasting for small area. VHF High will be used for nationwide area. In February, 2008, 17 companies or corporations (NHK, TOKYO FM, TBS R & C, FM OSAKA, FM802, Nippon Broadcasting System, etc) established the organization "VL-P ". (More than 110 organizations join "VL-P " now.) "VL-P " aims at drafting of ARIB Technical report and clarification of service image. The difference of Digital Radio (which is now broadcasted as a test) and Digital Radio (which will be broadcasted) is as follows. 30fps Video (QVGA, MPEG-4 AVC/H.264) 5.1 surround Audio Multi-channel programs Contents download, etc There is a subject to clear sharing condition with Analog FM Radio (76- 90MHz). It is necessary to fix the organizations that will provide new services by the middle of 2010 to start broadcasting after July An image of VHF Low service

17 Geneva, July 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 Connected One-Seg re-transmission system Combines only One-Seg signals ch9 ch10ch11ch12 ch13 ch8 ch4 ch6 ch1 ch3 ch5 6MHz ch7 Air Re-transmission Frequency aboveground underground ch2 ch3ch4ch5ch7ch8 ISDB-T Community One- Seg signals ch6 ch9-13 Frequency

18 Geneva, July Automatic Activation of Receivers by EWS - Research & Development in One-Seg - 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. 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. Prototype of EWS adaptor

19 Geneva, July Segments1 segment ModeMode 3 ReceptionFixed (Mobile)Mobile Modulation64QAMQPSK Code ratio3/42/3 Guard interval 1/8 (126 s) Bit rate16.851Mbps416kbps 1 Video codingMPEG-2 (30fps) H.264 (15fps) 16:9(320×180), 4:3(320×240) Audio codingMPEG-2 AACMPEG-2 AAC+SBR 2 Data broadcastingBML (XHTML) A ProfileBML (XHTML) C Profile Electric Program Guide OK (Now + Next + 8days) OK (Now + Next + 8programs) Closed captionOK Copy controlYes CASYesNo Example parameters for digital terrestrial television broadcasting 2 Spectral Band Replication 1 Example: Video (224kbps), Audio (55kbps), Data (80kbps), Closed caption (5kbps), EPG (20kbps), Control (32kbps) 12 Segments & 1 Segment (ISDB-T) - BST-OFDM technology -

20 Geneva, July Video coding Audio coding Data/ EPG coding Video Audio Data/EPG 12 segs Video coding Audio coding Data/ EPG coding Video Audio Data/EPG 1 seg Multiplexing Conditional Access Source coding TS Re-MuxOuter code (RS)Hierarchical separation Energy dispersal Delay compensation Byte interleaveInner codeBit interleaveMapping Energy dispersalByte interleaveInner codeBit interleaveMapping Delay compensation 12 segs 1 seg Layer synthesis & rate conversion Time interleaveFrequency interleave IFFTGuard interval addition D/AUp converterPower Amp Antenna OFDM frame configuration Pilot TMCC Aux channel Channel coding 1 seg 12 segs Source coding Configuration of Digital transmission - BST-OFDM technology -

21 Geneva, July Transmission ParameterMode 1Mode 2Mode 3 No. of OFDM segments13 Bandwidth5.575 MHz5.573 MHz5.572 MHz Carrier interval3.968 kHz1.984 kHz0.992 kHz No. of carriers Modulation system QPSK 16QAM 64QAM DQPSK Effective symbol length 252 s504 s ms Guard-interval length1/4, 1/8, 1/16, 1/32 of effective symbol length No. of symbols per frame204 Time interleaveMaximum 4 values: 0, about 0.13, 0.25, 0.5 sec Frequency interleaveIntra-segment or inter-segment interleaving Inner codeConvolutional coding (1/2, 2/3, 3/4, 5/6, 7/8) Outer codeRS (204, 188) Information bit rate3.65 Mpbs Mbps Hierarchical transmissionMaximum 3 levels Basic transmission parameters for terrestrial digital television broadcasting Basic transmission parameters

22 Geneva, July ARIB Standards and ITU-R Recommendations for ISDB-T ARIB Standards, ITU-R Recommendations

23 Geneva, July 2009 Digital Radio - 23 Tokyo area DRP homepage Osaka area 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 and several commercial radio stations or other companies. Digital Radio uses BST-OFDM technology (ISDB-T SB ). It is possible to send up to 13 independent programs including video and data in 6MHz. ISDB-T SB is recommended in ITU-R BS kW240W Digital Radio receiver (KDDI) (About 1.8 million receivers, 6/2008) AudioVideoDataEPG etc 36kbps Main Main + Sub3 144bps180kbps64kbps52kbps 180kbps64kbps52kbps MainSub1Sub2Sub3 440kbps

24 Geneva, July Transmission ParameterMode 1Mode 2Mode 3 OFDM segments1 Seg3 Segs1 Seg3 Segs1 Seg3 Segs Bandwidth432.5kHz1.289MHz 430.5kH z 1.287MHz429.5kHz1.286 MHz Carrier interval3.968 kHz1.984 kHz0.992 kHz No. of carriers Modulation system QPSK 16QAM 64QAM DQPSK Effective symbol length 252 s504 s ms Guard-interval length1/4, 1/8, 1/16, 1/32 of effective symbol length No. of symbols per frame204 Time interleaveMaximum 5 values Frequency interleaveIntra-segment (or inter-segment: 3Segs) interleaving Inner codeConvolutional coding (1/2, 2/3, 3/4, 5/6, 7/8) Outer codeRS (204, 188) Information bit rate kpbs – kbps Hierarchical transmissionMaximum 2 levels Basic transmission parameters for terrestrial digital radio broadcasting Basic transmission parameters (ISDB-T SB )

25 Geneva, July Transmission ParameterMode 1Mode 2Mode 3 OFDM segments13 to 33 #1 segments Bandwidth6000 / 14 * n kHz Carrier interval3.968 kHz1.984 kHz0.992 kHz No. of carriers108 * n * n * n + 1 Modulation system QPSK 16QAM 64QAM DQPSK Effective symbol length 252 s504 s ms Guard-interval length1/4, 1/8, 1/16, 1/32 of effective symbol length No. of symbols per frame204 Time interleaveMaximum 4 values Frequency interleaveIntra-segment (or inter-segment: 13Segs) interleaving Inner codeConvolution coding (1/2, 2/3, 3/4, 5/6, 7/8) Outer codeRS (204, 188) Information bit rate280.85* n kbps – * n kbps Hierarchical transmissionMaximum 3 levels for 13 segment part Basic transmission parameters for terrestrial multimedia broadcasting Basic transmission parameters (ISDB-T mm ) n : number of segment #1: case of Japan

26 Geneva, July 2009 ISDB-T mm (mobile multimedia) system 13 segment part 1 segment part ISDB-Tmm transmission signal 13 to 33 segment, Channel Bandwidth : 6000 / 14 * n kHz Example of the ISDB-Tmm compliant receivers with ISDB-T (13 segment) and ISDB-Tsb (1 segment ) demodulator. Partial reception of 13 seg part or 1 seg part Multi-Channel real-time and non real time services such as audio / video clips, e-books, etc.


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