1 / 22

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

gordon
Download Presentation

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

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. 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)

More Related