1 / 26

Broadcasting for mobile receivers

Broadcasting for mobile receivers. Highlight of Current Activities (1). to slide 8,9. Digital Terrestrial TV service in Japan

milly
Download Presentation

Broadcasting for mobile receivers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Broadcasting for mobile receivers Geneva, 13-16 July 2009

  2. Highlight of Current Activities (1) to slide 8,9 • 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 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. Geneva, 13-16 July 2009

  3. Highlight of Current Activities (2) to slide 10,11 • 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 16.851Mbps (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. Geneva, 13-16 July 2009

  4. Strategic Direction to slide 12,13 • 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 and several commercial radio stations or other companies. • DR uses a vacant VHF TV channel (CH-7) for the test transmission. • ISDB-TSB (Sound Broadcasting) transmission system is adopted for DR. Geneva, 13-16 July 2009

  5. 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 2009. • 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 2008. • 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) Geneva, 13-16 July 2009

  6. Next Steps/Actions to slide 14,15 • 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 • There’s 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-TSB is now under consideration for new services. • VHF High will be used for a new nationwide area multimedia service. And ISDB-Tmm(Mobile Multimedia) is now under development for it’s services. • One-Seg, ISDB-TSB, and ISDB-Tmm 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 2011. • ARIB is now preparing for the new services for multimedia broadcasting. Geneva, 13-16 July 2009

  7. Supplemental Slides Geneva, 13-16 July 2009

  8. Shipments of receivers - Digital Terrestrial TV in Japan / One-Seg - 4/2009 One-Seg million Shipments of receivers of Digital terrestrial broadcasting & Mobile phone with One-Seg tuner More than 50 million One-seg receivers Japan Electronics and Information Technology Industries Association, NHK Digital terrestrial broadcasting 12/2003 One-Seg service 4/2006 *1 Digital television + Terrestrial digital tuner + Cable digital STB ( Total number of Television: about 117 million, 7/2008 ) *2 Mobile phone with One-Seg tuner ( Total number of Mobile phone: 107 million, 4/2009 ) Geneva, 13-16 July 2009

  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 (From Homepage) Portable Players Geneva, 13-16 July 2009

  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) Geneva, 13-16 July 2009

  11. Convergence of Broadcasting & Communications - BST-OFDM technology / Features of One-Seg - to slide 4 Broadcasting Convergence Communications Watch TV TV & Data TV & Internet Internet Broadcasting station Broadcasting station BML BML BML, HTML Watching TV program on full screen Watching TV program and reading data on TV Watching TV program and reading data on the Internet Viewing or reading on the Internet Geneva, 13-16 July 2009

  12. Timeline of Digital Broadcasting services- Termination of Analog TV services / Digital Radio - 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 will be over 7/2011 Analog SD 12/2003 Terrestrial Digital One-Seg 4/2006 will be over 7/2011 Analog SD was over 9/2007 Satellite Analog HD Digital 12/2000 Test transmission Digital Radio 10/2003 24/7/2011 Geneva, 13-16 July 2009

  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 in 10/2003 (8 segments, VHF 7ch) TS1 TS2 TS3 TS4 TS5 TS6 TS7 TS8 TS9 TS10 TS11 TS12 TS13 1 Seg 1 Segment ハイビジョン 3 Segments Video※ TS1 TS2 Data service QPSK FEC = 2/3, GI = 1/16 (440kbps) Image 1 & 3 Segments are used in ISDB-TSB ※NHK started video servicesin July 2008. Geneva, 13-16 July 2009

  14. Rearrangement of VHF/UHF- VHF/UHF rearrangement after analog TV termination - 90-108MHz 1～3ch 170-222MHz 4～12ch 470-770MHz 13～62ch Now Analog TV Broadcasting Analog TV Broadcasting Analog TV Broadcasting Digital TV Broadcasting 18MHz 52MHz 300MHz 470-710MHz 13～52ch 715-725MHz 90-108MHz 170-202.5MHz 207.5-222MHz 730-770MHz Future Plan (1)-a (2) (1)-b Digital TV Broadcasting (3) (4) 18MHz 32.5MHz 14.5MHz 240MHz 10MHz 40MHz (VHF Low) (VHF High) GB 5MHz GB 5MHz （GB 5MHz） (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 Geneva, 13-16 July 2009

  15. Rearrangement of VHF/UHF- VHF/UHF rearrangement after analog TV termination - (VHF Low) (VHF High) 18MHz 14.5MHz Future Plan (1)-a (2) (1)-b Digital TV Broadcasting (3) (4) (1)-a Digital Radio broadcasting for Local block area & Digital community broadcasting for small area ⇒ ISDB-TSB (advanced) (1)-b Multimedia broadcasting for Nationwide area ⇒ ISDB-Tmm, MediaFLO 2008 2009 2010 2011 2012 2013 Terrestrial Analog TV broadcasting Digital Radio test transmission Multimedia Broadcasting ARIB Standard, Technical Report License policy Telecommunications Council Report Selection of corporations Geneva, 13-16 July 2009

  16. Rearrangement of VHF/UHF- VHF/UHF rearrangement after analog TV termination - 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 2011. An image of VHF Lowservice Geneva, 13-16 July 2009

  17. 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 ch6 ch7 ch8 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 ch6 ch8 ch9 ch10 ch11 ch12 ch13 ch5 ch3 ch4 ch7 ch1 ch2 Frequency Geneva, 13-16 July 2009

  18. Automatic Activation of 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 Geneva, 13-16 July 2009

  19. 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) Geneva, 13-16 July 2009 ※2 Spectral Band Replication

  20. Configuration of Digital transmission - BST-OFDM technology - 12 segs 12 segs Source coding Channel coding 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 Delay compensation Byte interleave Inner code Bit interleave Mapping 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 Geneva, 13-16 July 2009

  21. Basic transmission parameters Basic transmission parameters for terrestrial digital television broadcasting Geneva, 13-16 July 2009

  22. ARIB Standards, ITU-R Recommendations ARIB Standards and ITU-R Recommendations for ISDB-T Geneva, 13-16 July 2009

  23. Digital Radio- Digital Radio - Tokyo area Osaka area Digital Radio receiver (KDDI) (About 1.8 million receivers, 6/2008) 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 and several commercial radio stations or other companies. Digital Radio uses BST-OFDM technology (ISDB-TSB). It is possible to send up to 13 independent programs including video and data in 6MHz. ISDB-TSB is recommended in ITU-R BS.1114. < Example parameters of Digital Radio > Audio Video Data EPG etc 144bps 180kbps 64kbps 52kbps 440kbps Main Main + Sub3 36kbps 36kbps 36kbps 36kbps 180kbps 64kbps 52kbps 440kbps Geneva, 13-16 July 2009 Main Sub1 Sub2 Sub3

  24. Basic transmission parameters(ISDB-TSB) Basic transmission parameters for terrestrial digital radio broadcasting Geneva, 13-16 July 2009

  25. Basic transmission parameters(ISDB-Tmm) Basic transmission parameters for terrestrial multimedia broadcasting n : number of segment #1: case of Japan Geneva, 13-16 July 2009 25

  26. ISDB-T mm (mobile multimedia) system ISDB-Tmm transmission signal 13 to 33 segment , Channel Bandwidth : 6000 / 14 * n +38.48 kHz 13 segment part 1 segment part 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. Geneva, 13-16 July 2009

More Related