AV PDA Broadcastin g Centers Audio /PC

Personal Mobile Interactive (, PDA,, DMB ),, ( 150km/h ) (PPV,, ) Personal Mobile Interactive Multimedia Broadcasting Services

6 MHz TV Channel Block A Block B Block C 1.536 MHz 1Channel for 1 license (TV/FM radio) Multiple Channels for 1 license (DMB)

DAB : Digital Audio Broadcasting

Audio Service (MUSICAM) Data Service Packet or stream Mode Video Video Encoder (H.264) Video service DAB Mux OFDM Modulation Associated Audio Audio Encoder (ER-BSAC) TS Mux RS Encoder (204,188) Conv. Interleaver Stream Mode Transmitter (Interactive) Data Additional modules for DMB Eureka-147 DAB System (ETSI 300 401)

Ensemble DAB ENSEMBLE ONE Service ALPHA 1 RADIO BETA RADIO ALPHA 2 RADIO Service components Audio ALPHA- TMC ALPHA- SI Audio 2 nd -ry Audio Audio MCI SI FIDC Sub CH a Sub CH b Sub CH c Sub CH d Sub CH 63

MPEG-4 AVC Video MPEG-4 SL Encapsulation MPEG-4 BSAC Audio MPEG-4 SL Encapsulation MPEG-4 BIFS Interactive Contents MPEG-4 SL Encapsulation MPEG-2 TS Multiplexing Forward Error Correction Eureka-147 Stream Mode AVC : Advanced Video Coding, BSAC : Bit Sliced Arithmetic Coding, FEC : Forward Error Correction

Outer coder Source data RS encoder Convolutional Interleaver A Ereka-147 DAB system Synch. channel generator A Energy dispersal scrambler Convolutional encoder Time Interleaver FIC and MSC (frequency interleaved) symbol generator OFDM signal generator

HEX 15 2 1 0 02 where ), ( ) )( )( ( ) ( = + + + + = λ λ λ λ λ x x x x x g L 1 ) ( 2 3 4 8 + + + + = x x x x x p

3. 기술개발 현황 지상파 DMB 송신시스템 실시간 DMB 미디어 처리기 앙상블 재다중화기 (Ensemble Remultiplexer) DMB File Caster DMB 분석기 - 25 - 방송시스템연구그룹

Live Traffic Information

Provision of a variety of multimedia objects Video, Audio, Image, Text, Graphics, video clip The behavior of objects can be determined by an user interaction and/or time event. local/remote interactivity MPEG-4 BIFS Based on MPEG-4 Systems technology Service Example <Interactive news service>

Java Downloadable Application DMB DMB. Service Example

Necessity DMB is targeting the mobility Mobility needs safe and convenient environment Display means is not an absolute solution Who has the benefits To the mobile users: drivers To the blind To the people who has receiver with no video display device Additional Components ASR (Automatic Speech Recognition) TTS (Text To Speech) Service Example Voice EPG (Electronic Program Guide)

DMB

passive Total Service through FTTH terrestrial DMB Multi-ch CATVASA Satellite Expansion by Digitalization personal Expansion by Broadband Narrowband Broadband Broadcasting Mobile Communicatio n active HDTV mass

Fixed Audio Encoder Media Processor Data Encoder High Power Amplifier Wireless Radio Channel Portable Ensemble Multiplexer Multimedia Content Server COFDM Modulator Ethernet Mobile Managemen t Server Wireless Radio Channel Data Flow Control Line IP network or Internet MSC or Base Station

Web (BWS) EPG Text Slideshow BIFS TTI Convergence (Rich Media) DMB-Java

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