Advanced T-DMB (AT-DMB) standard for Enhanced Mobile TV Service Global Standards Collaboration (GSC) 14 DOCUMENT #: GSC14-GRSC7-021R1 FOR: Presentation SOURCE: TTA, Korea AGENDA ITEM: 4.2 CONTACT(S): Daejung Kim (kdj@tta.or.kr) Advanced T-DMB (AT-DMB) standard for Enhanced Mobile TV Service DJey KIM(kdj@tta.or.kr) TTA Geneva, 13-16 July 2009

Standardization Status of TTA PG801 Highlight of Current Activities Standardization Status of TTA PG801 Work scope of TTA PG801(DMB Project Group) Development of DMB Standards Promoting international harmonization of DMB TTA T-DMB Standards T-DMB Basic interface standards (’05) T-DMB data broadcasting Standards (’08) International Harmonization T-DMB was reflected in ETSI, ITU-R REC-BT.1883 (‘07) T-DMB Middleware platform Spec.(TTAS.KO-07.0049) will be harmonized with ETSI Spec in 2009

Highlight of Current Activities T-DMB Service in Korea Service coverage After launched in 2005, T-DMB service covers the whole national area including Seoul subway area now 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)

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 was required within the limited frequency band.

Strategic Direction Requirements for new enhanced standard(AT-DMB) Backward compatibility with the T-DMB service Increasing data rate up to maximum twice vs. T-DMB More service models of AT-DMB Available as DTV alternative service in developing countries Interactive data services using extended channels of AT-DMB and wireless communications

Challenges Turbo code For Backward compatibility Composed of base layer and enhancement layer ** BL(T-DMB service), EL(additional data and video service) For increasing payload in Enhancement layer Hierarchical Modulation ** Technique for multiplexing and modulating multiple data streams into one single symbol stream (This was also adopted to TIA Mediaflo and ETSI DVT-T Spec) Turbo code ** This has better performance compared with convolutional code applied to T-DMB By increased payload, It is possible to commercialize Multi-Channel Service in mobile environment & High-Quality Service in fixed environment

Future Direction As TTA Standard For International Harmonization TTA published AT-DMB std. in June 18, 2009 For enhancement of service Develop Specs for interactive data services using extended channels of AT-DMB (Return channel: wireless communications) For International Harmonization Presented at WorldDMB Meeting contribute to ITU-R SG6 at the end of 2009

Supplementary Slides Geneva, 13-16 July 2009

Concept of Multi-channel Service (AT-DMB)

Concept of high quality Service

AT-DMB Standard Overview categories Hierarchical modulation mode B-mode Q-mode Trans-mission Bandwidth 1.536 MHz Effective data rate BL 0.8~1.728 Mbps EL 0.288~0.576 Mbps 0.576~1.152 Mbps FEC BL : Convolutional Code, EL : Turbo code Code rate (EL) 1/2, 2/5, 1/3, 1/4 Modulation DQPSK(BL), BPSK(EL) or QPSK(EL) Hierarchal modulation Video Compression H.264, SVC (optional) H.264 SVC Audio Compression BSAC, AAC+ (optional), MPEG Surround (optional) MPEG Surround Video Resolution QVGA (320*240), VGA(640*480, optional) VGA(640*480) Geneva, 13-16 July 2009

AT-DMB System Overview System Structure

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 Mobile Environment (BL) Fixed Environment (BL+EL) Geneva, 13-16 July 2009

AT-DMB Service model(2) AT-DMB Service Model – Data Broadcasting Service TPEG, BWS, Clipcasting, Filecasting services in the mobile environment Geneva, 13-16 July 2009

Benefit of AT-DMB(1) Multi-Channel AT-DMB Basic Channel [BL) Select Video 1 Basic Channel [BL) Additive Channel (EL) Video 2 Video 3 Audio 1 Geneva, 13-16 July 2009

High-Quality Channel (EL) Benefits of AT-DMB(2) High Quaility Mode Video 1 Select Video 2 Basic Channel [BL) High-Quality Channel (EL) Geneva, 13-16 July 2009

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

Comparison of Mobile-TV Spec T-DMB AT-DMB MediaFLO DVB-H Bandwidth 1.536MHz 5/6/7/8MHz Frequency VHF/L VHF/UHF/L Modulation Pi/4 DQPSK Pi/4 DQPSK(BL) QPSK, BPSK(EL) Hierarchical modulation QPSK 16QAM 64QAM FEC RS RS(MPE-FEC), RS convolutional Convolutional(BL) Turbo(EL) Turbo Convolutional Code rate EEP,UEP EEP,UEP(BL) 1/2,2/5,1/3,1/4(EL) 1/3, 1/2, 2/3 1/2, 2/3, 3/4, 5/6, 7/8 FFT size 2k,1k,0.5k,0.25k 1k, 2k, 4k, 8k 2k, 4k, 8k Interleaving depth 384msec 384msec(BL) 384msec(EL, Q mode) 768msec(EL, B mode) 750msec ~500msec Maximum SFN size 73.8km (GI=246us) 55.4km (4k, GI=1/4) 44.8km(4k, GI=1/4) Payload 0.8~1.728Mbps(@1.5MHz) 1.088~2.304Mbps(B mode) 1.376~2.88Mbps(Q mode) 2.1~8.4Mbps(@6MHz) 2.8~7.5Mbps(@6MHz, MPE-FEC=3/4) Geneva, 13-16 July 2009

T-DMB Market Share in Korea Geneva, 13-16 July 2009

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

T-DMB Frequency Allotment (1) T-DMB Freq. Band in Korea TV (ch. 2∼4) 54∼72 (ch. 5∼6) 76∼88 FM Radio 88∼108 TV / T-DMB (ch. 7∼13) 174∼216 (ch. 14∼60) 470∼752 Allotment Frequency (MHz) Band VHF UHF 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

T-DMB Frequency Allotment (2)

Interactive services AT-DMB Network Content Server Interactive Data Audio Video T-DMB interactive services AT-DMB interactive services Mux/COFDM (BL) Hierarchical Modulation (EL) RF Channel Content Server AT-DMB Network CAS BL Service Channels EL Service Channels Wireless communication network (WiBro, WCDMA, etc.)