Jihun Cha Digital Broadcasting Research Division Broadcasting Media Research Group

Transcription

1 DMB Interactive Data Broadcasting Jihun Cha Digital Broadcasting Research Division Broadcasting Media Research Group KRnet

2 Contents I Introduction to T-DMB II Interactive data services on T-DMB III Conclusions KRnet

3 I Introduction to T-DMB KRnet

4 What is TT-DMB? Strong demand for TV services under mobile environments T-DMB (Terrestrial Digital Multimedia Broadcasting) Mobile TV & multimedia service based on MPEG-4 AV services through terrestrial DAB framework From listening to watching while listening' Small sized TV, PDA receivers and mobile phones Complementary to terrestrial digital TV Changed from analogue to digital radio CD quality audio Weather/ Stock information T-commerce Mobile broadcasting Text & data service DAB : Digital Audio Broadcasting KRnet 2005 Traffic info & Navigation -4-

5 What is required for T-DMB? Requirements Receiving condition Receivable on a moving vehicle up to 200Km/h Basic audio: DAB CD-quality stereo Multimedia services Video: MPEG-4 AVC VCD-quality for 5 inch display (max. 352x288@30fps) Audio: MPEG-4 BSAC CD-quality stereo (max. 48 KHz sampling) Data service (Optional): MPEG-4 Systems Text & graphic Provision of local and remote interactivity KRnet

6 What makes T-DMB? (1/2) DAB specification (EUREKA-147: Rec. ITU-R BS System A) Bandwidth: 1.54MHz Modulation: DQPSK/OFDM Audio Program Service: MPEG-1,-2 Layer 2 Multiplexing: Eureka 147 Inner Error Correction Code: Convolution Code (4,1,7) Variable Rate Multimedia specification Video : MPEG-4 Part 10 AVC (H.264) Audio : MPEG-4 Part 3 BSAC Data broadcasting : MPEG-4 BIFS Multiplexing : MPEG-4 SL + MPEG-2 TS Additional channel coding : Reed-Solomon (204, 188) KRnet

7 What makes T-DMB? (2/2) Eureka-147 Main Service Multiplexer Transmission Frame Multiplexer COFDM Modulator/Up-Converter HPA/Channel Filter Video Multiplexer Stream Mode Optional Conditional Access Scrambler Energy Dispersal Scrambler Convolutional Encoder Time Interleaver FIC: Fast Information Channel SI: Service Information KRnet

8 The structure of T-DMB multiplexer for video service PSI Section OD/BIFS ES TS ES Data ES KRnet

9 How can T-DMB be delivered? (1/3) Frequency range in Korea Two VHF TV Channels of 6MHz Number of broadcasting services 1.5MHz FDM x 3 6MHz - 1 ensemble = a multiplexed 1.54 MHz Possible No. of multimedia 6MHz Contents-dependent dynamic rate allocation 3 programs (1 program/an ensemble: up to 768 Kbps video) 6 programs (2 programs/an ensemble: up to 384 Kbps video) 9 programs (3 programs/an ensemble: up to 256 Kbps video) KRnet

10 How can T-DMB be delivered? (2/3) Transmission system Conventional DAB T rans m itter EnMUX Manager Scheduling/Control/Monitoring signal Audio Source MPEG Audio Encoder MPEG-1/-2 audio stream SI, MCI PAD (text, image, etc.) Data Inserter N-PAD (file, stream, etc.) Service MUX STI Ensemble MUX ETI IOD Generator ETI DM B M edia P rocess or M PEG-4 Sy s tem s M 4onM 2 Encoder IOD Ensemble ReMUX ETI COFDM Modulator/ Up- Converter RF HPA/ Channel Filter OD/BIFS Generator OD/ BIFS Video SLP, Audio SLP, OD/BIFS SLP M4overM2 DVB-ASI *Outer Coder *Outer Coder : RS Encoder + Conv. Interleav er A/V Source M PEG-4 A/ V E ncoder MPEG-4 Video Encoder MPEG-4 Audio Encoder Video ES Audio ES SL Packetizer Monitoring Control/ Sc heduling/ EnReMUX Manager BIFS : Binary Format for Scene COFDM : Coded-Orthogonal Frequency Division Multiplexing DVB-ASI : Digital Video Broadcast Asynchronous Serial Interface ES : Elementary Stream ETI : Ensemble Transport Interface HPA : High Power Amplifier IOD : Initial Object Descriptor MCI : Multiplex Configuration Information MPEG : Moving Picture Expert Group N-PAD : Non-Programme Associated Data OD : Object Descriptor PAD : Programme Associated Data RF : Radio Frequency SI : Service Information SL : Sync Layer STI : Service Transport Interface TS : Transport Stream KRnet

11 How can T-DMB be delivered? (3/3) V HF tuner IF ADC OFDM demodulator Terminal MPEG Audio Decoder I 2 S SPDIF DAC Digital AMP speakers MPEG-1/-2 lay er II audio Ensemble DEMUX MPEG-4 on MPEG-2 TS RS+Conv. Interleaver Decoder MPEG-2 TS DEMUX IOD Decoder OD/BIFS Decoder MPEG-4 Video Decoder Compositor MPEG-4 Audio Decoder KRnet

12 Tentative service schedule Selection of T-DMB multiplexer providers ( ) Broadcasting license will be issued by MIC ( ) AV and simple data services in Metropolitan Area ( ) AV and simple data services in Metropolitan Area (Late 2006.) Interactive data service ( ) Bi-directional interactive service ( ) Coverage Service 2005 Seoul Metropolitan Area Two TV channels 2006 Nation-wide service : Local Channels Six areas One TV channel 2006~ Nationwide Channel After the end of analog TV (In 2010) CD quality music Multimedia Various data services, such as weather, stock, travel KRnet Interactive service Navigation

13 Service plan of multiplexer providers (1/2) 법인명 한국방송공사 ( 주 ) 문화방송 채널구성계획 ( 채널명 - 방송유형 - 전송용량 ) 운용방법 방송분야 KBS-Mobile 1 - TV - 544k 직접사용종합편성 KBS-Mobile 3 - 라디오 - 128k 직접사용음악전문 KMMB-R - 라디오 - 128k 임대 ( 케이엠엠비 ) 생활경제전문 OZIC - 라디오 - 128k 임대 (CJ 미디어 ) 음악전문 KBS-Mobile 5 - 데이터 - 220k 직접사용종합편성 MBC DMB TV - TV - 544k 직접사용종합편성 MBC DMB 라디오 - 라디오 - 128k 직접사용종합편성 MBN 경제라디오 - 라디오 - 128k 임대 (MBN) 경제전문 아리랑영어라디오 - 라디오 - 128k 임대 ( 국제방송교류재단 ) 한국문화전문 MBC DMB 데이터 - 데이터 - 220k 직접사용 종합편성 SBS DMB TV - TV - 544k 직접사용 종합편성 SBS DMB 라디오 - 라디오 - 128k 직접사용 종합편성 TBS DMB 라디오 - 라디오 - 128k 임대 (TBS-서울시) 교통전문 ( 주 ) 에스비에스 경기방송 DMB 라디오 - 라디오 - 128k 임대 ( 경기방송 ) 문화 예술전문 한겨레 DMB 데이터 - 데이터 - 96k 임대 ( 한겨레신문 ) 직업 교육전문 LGT DMB 데이터 - 데이터 - 96k 임대 (LG 텔레콤 ) 레저 엔터테인먼트전문 SBS DMB 데이터 - 데이터 - 32k KRnet 직접사용 신기술과뉴서비스개발 / 실험 ( 종합편성 )

14 Service plan of multiplexer providers (2/2) 법인명 채널구성계획 ( 채널명 - 방송유형 - 전송용량 ) 운용방법 방송분야 YTN 플러스 - TV - 512k 직접사용종합편성 주식회사와이티엔디엠비 ( 가칭 ) TBN 한국교통방송 - 라디오 - 160k Satio+ - 라디오 - 160k 임대 ( 도로교통안전관리공단 ) 임대 (Satio) 교통전문 음악 YTN 프리미엄 - 데이터 - 320k 직접사용종합편성 한국 DMB TV - TV - 544k 직접사용종합편성 한국디엠비주식회사 ( 가칭 ) i4u - 라디오 - 128k Live4U - 라디오 - 128k 임대 ( 기독교방송 ) 임대 ( 뮤직시티미디어 ) 생활교양 공연음악 문화전문 한국 DMB 데이터 - 데이터 - 348k 직접사용종합편성 KMMB - TV - 512k 직접사용종합편성 케이엠엠비주식회사 ( 가칭 ) KBS Mobile2 -TV - 512k 임대 (KBS) 가족문화전문편성 KMMB data - 데이터 - 128k 직접사용종합편성 KRnet

15 The Scenes of the T-DMB Test KRnet

16 What is available for T-DMB? (1/5) T-DMB transmission system DAB Transmitter DAB Audio Encoder Ensemble Multiplexer Ensemble Remultiplexer T-DMB Media Processor EnReMUX Manager T-DMB PCI Receiver/ SW Player KRnet

17 What is available for T-DMB? (2/5) T-DMB transmission system Ensemble ReMultiplexer Stream server Media processor (S/W) Media processor (S/W) KRnet

18 What is available for T-DMB? (3/5) T-DMB transmission system DMB analyzer system Media processor (H/W) Media processor (H/W) KRnet

19 What is available for TT-DMB? (4/5) T-DMB terminals PC based software player Terminals for moving vehicles KRnet Mobile phones

20 What is available for T-DMB? (5/5) T-DMB coverage 70 km KRnet

21 II Interactive data services on T-DMB KRnet

22 What is the next steps of T-DMB beyond AV services? Expansion from traditional broadcasting Simple AV media to rich media data services Linear contents to interactive contents Uni-directional to bi-directional services Fixed T-DMB Channel (Broadcasting Contents) Portable Broadcasting Station Fixed Wireless network (User s request & Individual data) KRnet

23 Interactive richmedia services on T-DMB AV independent data services MOT: Multimedia Object Transfer TDC : Transparent Data Channel IP Tunneling Services BWS (Broadcast web sites), SlideShow EPG: XML and Voice EPG AV synchronized data services Based on MPEG-4 Systems technology Provision of variety of multimedia objects Video, Audio, Image, Text, Graphics The behavior of objects can be determined by an user interaction and/or time event. Local/remote interactivity KRnet

24 AV independent Interactive data services (1/2) T-DMB TTI service Car and personal navigation services Live road traffic/public transport information Massive traveler/location based services Parking/weather/restaurant/tourist spot information Environment information alert Bi-directional location based services Hotel/tourist ticket reservation service Travel information on demand TTI: Traffic and Traveler Information KRnet

25 AV independent Interactive data services (2/2) T-DMB TTI service platform TTI Server TTI DMB Broadcasting System TPEG Based TTI Authoring Server DMB Transmitter Mobile Receiver KRnet

26 AV synchronized interactive data service (1/2) MPEG-4 Systems technology The first international richmedia standard Video, Audio, Image, Text and Graphics Provision of additional information related and/or unrelated AV program Information on actors, background music Weather forecast, Price of stock, News summary Synchronization of interactive data to main AV The behavior of objects can be determined by an user interaction and/or time event. Local interactivity Remote (Bi-directional) Interactivity Additional data can be accessible through a back channel. Multilingual audio & caption services Provision of multilingual services depending on a user Selection of language by a user KRnet

27 AV synchronized interactive data service (2/2) Interactive news service Interactive advertisement Video+Auido+Images+Streaming text Showing/hiding various additional data by user interaction Providing program related additional data synchronized with main AV Linking to website - To obtain detailed information on products - To Purchasing products KRnet

28 Interactive contents authoring system (1/2) Authoring system GUI KRnet

29 Interactive contents authoring system (2/2) System overview & features Authoring of bidirectional interactive contents synchronized with main AV Conforming with the Terrestrial DMB Provision of an intuitive graphical user interface Support of MPEG-4 XMT and MP4 file formats Applications Bidirectional interactive multimedia service on T-DMB Interactive E (Electronic) and T (Television)-Commerce Interactive video-on-demand services KRnet

30 III Conclusions KRnet

31 Conclusions T-DMB, new paradigm for the digital multimedia broadcasting Mobile reception with various data (audio/video/data) services Bidirectional interactive broadcasting services through telecommunication network Provision of a convenient interactive media consumption environment Next generation broadcasting framework for anytime, anywhere and anydevices Towards the personalized broadcasting Foundation for ubiquitous information services Provision of various interactive services by harmonizing broadcasting and communications KRnet