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Advanced T-DMB (AT-DMB) standard for Enhanced Mobile TV Service

Global Standards Collaboration (GSC) 14. Advanced T-DMB (AT-DMB) standard for Enhanced Mobile TV Service. DJey KIM(kdj@tta.or.kr) TTA. Highlight of Current Activities. Standardization Status of TTA PG801. Work scope of TTA PG801(DMB Project Group) Development of DMB Standards

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Advanced T-DMB (AT-DMB) standard for Enhanced Mobile TV Service

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  1. Global Standards Collaboration (GSC) 14 Advanced T-DMB (AT-DMB) standardfor Enhanced Mobile TV Service DJey KIM(kdj@tta.or.kr) TTA

  2. Highlight of Current Activities Standardization Status of TTA PG801 • Work scope of TTA PG801(DMB Project Group) • Development of DMB Standards • Promoting the international harmonization of DMB standards • TTA T-DMB Standards • T-DMB Basic interface standards (’05) • T-DMB data broadcasting Standards (’08) • International Harmonization • T-DMB Specification was reflected in ITU-R REC-BT.1883 (‘07) • T-DMB Middleware platform Specification(TTAS.KO-07.0049) is expected to harmonize with ETSI standard in 2009

  3. Highlight of Current Activities T-DMB Service in Korea • Service coverage • Launched T-DMB commercial service (‘05, Korea) • Nowadays, T-DMB service covers the whole national area including Seoul subway area • T-DMB receivers • The Number of DMB receivers reached 15 mil. (‘08) • - Every family owns at least one T-DMB receiver • DMB Market • T-DMB DMB receiver market is strongly driven by two types of convergence devices such as mobile phones and car navigation systems • * Mobile operators(KT) have begun to aggressively push interactive services based on BIFS technology to create additional revenue using T-DMB. • * Most navigation systems now support DMB In addition TPEG services are becoming another attractive feature of DMB enabled navigation systems(Real-time traffic information via TPEG)

  4. Highlight of Current Activities T-DMB Service in Korea • Network Cost • The network investment of T-DMB is less than that the other Mobile TV service with similar coverage • Channel capacity • But, T-DMB could provide less number of services than the other Mobile TV. • More channel capacity for variety multimedia and data services is required within the limited frequency band. • Need to make new enhanced standard • There is an urgent need for the next step in the mobile broadcasting technology compensating T-DMB to penetrate the global mobile broadcasting market.

  5. Strategic Direction • Requirements for new enhanced standard(AT-DMB) • The Backward compatible with the T-DMB service • Increasing data rate up to maximum twice vs.T-DMB data rate • Multi-Channel Service (mobile environment) • - Provides additive A/V and data services • High-Quality Service (fixed environment) • - Provides near SD image quality video service & multi-channel audio service • More service models of new enhanced standard(AT-DMB) • Available as DTV alternative service in developing countries • TPEG, BWS, Clipcasting, Filecasting servicesin the mobile environment shall be able to apply • Interactive data services using extended channels of AT-DMB and wireless communications

  6. Challenges • AT-DMB service is composed of base layer and enhancement layer • Base layer : T-DMB service • Enhancement layer : additional data service and video Concept of multi-channel service Concept of High-quality service

  7. Challenges • More Hierarchical Modulation (employed for backward compatibility & increasing payload) • Technique for multiplexing and modulating multiple data streams into one single symbol stream (This Modulation was also adopted to TIA Mediaflo and ETSI DVT-T Spec) • Turbo code • Enhancement layer requires high performance channel code • This has better performance compared with convolutional code applied to T-DMB

  8. Future Direction • As TTA Standard • TTA PG801 completed AT-DMB std.& published in June 18, 2009 • Enhancement layer : additional data service and video • For International Harmonization • This AT-DMB technology has been presented at WorldDMB Meeting • This AT-DMB technology will be contributed to ITU-R SG6 at the end of 2009

  9. Future Direction • For enhancement of service • Interoperable service technology with various wireless communication network like WiBro and WCDMA • Interactive data services using extended channels of AT-DMB and wireless communications • Providing user participation in services with a return channel through communication network AT-DMB Network BL Service Channels Mux/COFDM (BL) Video T-DMB interactive services RF Channel Audio CAS ContentServer Mux/COFDM (EL) EL Service Channels HierarchicalModulation AT-DMB interactive services Interactive Data Wireless communication network (WiBro, WCDMA, etc.)

  10. Supplementary Slides

  11. AT-DMB Standard Overview AT-DMB Standard

  12. AT-DMB System Overview System Structure

  13. AT-DMB Service model(1) AT-DMB Service Model – DTV alternative service in developing countries • High-Quality Broadcasting Service • Mobile Environment : Video Service with the QVGA (CIF) size • Fixed Environment : Video service with the VGA size (Scalable Video Coding) High-Quality QVGA  VGA Fixed Environment (BL+EL) Mobile Environment (BL)

  14. AT-DMB Service model(2) AT-DMB Service Model – Data Broadcasting Service • TPEG, BWS, Clipcasting, Filecasting servicesin the mobile environment

  15. Video 1 Video 2 Video 3 Audio 1 Benefit of AT-DMB(1) Multi-Channel AT-DMB Additive Channel (EL) Basic Channel [BL) Select Video 1

  16. Video 1 Video 1 Video 2 Benefits of AT-DMB(2) High Quaility Mode High-Quality Channel (EL) Basic Channel [BL) Video 1 Select

  17. Benefits of AT-DMB(3) Local Broadcasting Service T-DMB AT-DMB AT-DMB BL: Existing T-DMB service for resolving the shadowing area EL: Location based service - Local advertisement, Local bulletin service, Disaster Broadcasting etc.

  18. Comparison of Mobile-TV Spec

  19. T-DMB Market Share in Korea

  20. Modes for Hierarchical Modulation Operation Mode • B-Mode • BPSK forenhancement layer • Payload : max. 50% increase • Suitable for mobile reception • Q-Mode • QPSKfor enhancement layer • Payload : max.100% increase • Suitable for stationary reception

  21. Band VHF UHF Allotment TV (ch. 2∼4) TV (ch. 5∼6) FM Radio TV / T-DMB (ch. 7∼13) TV (ch. 14∼60) Frequency (MHz) 54∼72 76∼88 88∼108 174∼216 470∼752 T-DMB Frequency Allotment (1) T-DMB Freq. Band in Korea The Metropolitan area Allots 12MHz (ch.8 & ch.12) 6 broadcasters Local Province Allots 6MHz per region (6 regions in Korea) 3 broadcasters per region

  22. T-DMB Frequency Allotment (2)

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