ISPACS 2005 2005 International Symposium on Intelligent Signal Processing and Communication Systems Intelligent and Ubiquitous Multimedia Services through Interactive Digital Broadcasting Jar Ferr Kevin Yang Institute of Computer and Communication Engineering Department of Electrical Engineering National Cheng Kung University Tainan Taiwan Republic of China Outline 1 Multimedia Broadcasting Systems National Cheng Kung University Tainan Taiwan 2 2 Ubiquitous Multimedia Services 3 Interactive Broadcasting Systems 4 Intelligent Multimedia Broadcasting 5 Conclusion Department of Electrical Engineering Institute of Computer and Communication Engineering Television Broadcasting National Cheng Kung University Tainan Taiwan 3 Television System An electronic system for providing video audio text broadcasting multimedia services B W TV 1923 Color TV 1954 Mono Audio Stereo Bilingual Audio IDTV Improved Definition TV HDTV High Definition TV 1988 Japan MUSE System analog 1992 Europe HDMAC System analog Department of Electrical Engineering Institute of Computer and Communication Engineering Digital Multimedia Advantages Advantages National Cheng Kung University Tainan Taiwan 4 1 Reliability 2 More efficient multiplexing 3 Miniturization 4 Data handling precision 5 Less calibration 6 More versatile 7 Great channel capacity Disadvantages 1 be Large data bandwidth Can overcome by recently developed compression technologies and by high speed VLSI circuits or CPU 2 High complexity Department of Electrical Engineering Institute of Computer and Communication Engineering Overview of TV History National Cheng Kung University Tainan Taiwan Digital HDTV 1996 Super HDTV 2020 3D TV 2020 B W TV 1923 Color TV 1954 First HDTV 1988 1923 Analog B W TV 1954 1988 Analog Analog Color TV Color TV Analog HDTV 1996 2020 Digital Digital Super 3D TV SDTV HDTV HDTV A new TV system was invented for every 30 years 5 Department of Electrical Engineering Institute of Computer and Communication Engineering Digital Television Transmitter Video Subsystem Audio Video Compression Audio Subsystem Audio Compression Ancillary data RF Transmission Subsystem Error Correction Encoder Multiplexer National Cheng Kung University Tainan Taiwan 6 Video Multiplexing Subsystem Transport Digital Modulation Mixer Control data Department of Electrical Engineering Institute of Computer and Communication Engineering Digital Television Receiver RF Receiving Subsystem Demultiplexing Subsystem Video Decoding Subsystem Error Correction decoder Transport Demultiplexer National Cheng Kung University Tainan Taiwan Video Decoder Digital De modulation Mixer Tuner Video Audio Decoding Subsystem Audio Decoder Audio Ancillary data Control data 7 Department of Electrical Engineering Institute of Computer and Communication Engineering Digital Video Broadcasting Systems Satellite National Cheng Kung University Tainan Taiwan 8 Modulated MPEG 2 Transport Stream Terrestrial DVB T DVB S DVB C DVB Service Provider STB Cable Department of Electrical Engineering Institute of Computer and Communication Engineering STB STB DTV Standards Adoption Map National Cheng Kung University Tainan Taiwan DVB T ATSC DTV DMB 9 ISDB T Department of Electrical Engineering Institute of Computer and Communication Engineering ATSC DVB T ISDB T Systems Systems Video National Cheng Kung University Tainan Taiwan 10 Audio Transport Stream Inner Coding Inner Interleaver Data Randomized Modulation ATSC 8 VSB DVB T COFDM ISDB T BST OFDM Main Profile Syntax of ISO IEC 13818 2 MPEG 2 video ATSC Standard ISO IEC 13818 3 ISO IEC 13818 7 A 52 MPEG 2 Audio Layer II MPEG 2 Dolby AC 3 or Dolby AC 3 AAC audio ISO IEC 13818 1 MPEG 2 TS transport stream Rate 2 3 trellis code 12 to 1 trellis code interleaver 16 bit PRBS 8 VSB Punctured convolution code Rate 1 2 2 3 3 4 5 6 7 8 Constraint length 7 Polynomials octal 171 133 Bitwise Bitwise interleaving interleaving frequency interleaving and frequency and selectable time interleaving interleaving 16 bit PRBS 16 bit PRBS COFDM BST OFDM with 13 QSPK 16QAM 64QAM frequency segments Hierarch mod multi DQPSK QPSK 16QAM Resolut constellation 64QAM Heirarch mod 16QAM and 64QAM 3 mod on 13 segments Quard interval 1 32 Guard interval 1 32 1 16 1 8 1 4 OFDM sym 1 16 1 8 OFDM Sym 2modes 2k 8k FFT 3 modes 2K 4K 8K FFT Department of Electrical Engineering Institute of Computer and Communication Engineering DMB T Chinese DTV System National Cheng Kung University Tainan Taiwan Time Schedule 2002 Digital Broadcasting Test in three major cities Peking Shanhei Shenjun 2003 Finalized Chinese DTV system DMB T 2008 Commercial HDTV broadcasting and live HDTV video for Peking Olympic Game 2010 All digital TV broadcasting 2015 Terminate all analog TV Digital Multimedia Broadcasting DMB Jointly developed by Qinghua University in Beijing and US based Legend Silicon Proposed for Mainland China and Hong Kong markets DMB T terrestrial uses Time domain synchronous TDS OFDM Provide better synchronization for mobile devices 11 Department of Electrical Engineering Institute of Computer and Communication Engineering Development of Digital TV in Taiwan National Cheng Kung University Tainan Taiwan 12 1997 1998 1999 2000 2001 Start DTV program Choose ATSC standard DTV Test site established DTV broadcasted 6hr day Performance comparisons between ATSC and DVB T 2001 Change to DVB T system 2003 Start to DTV broadcasting 2010 All DTV system switch off all analog TV systems DTV Broadcasting Stages 1 SDTV Program first 2 HDTV Programs 3 Information services 4 Mobile TV transmission 5 Interactive TV Systems 6 Pay TV systems Department of Electrical Engineering Institute of Computer and Communication Engineering Challenges for DTV Broadcasters National Cheng Kung University Tainan Taiwan Internet TV Cable Broadcasters 3G Introduction Digital Content Protection Highly Interactive Much more selectivity cross legal limitation Provide Broadband Services More channels 181 analog channels Embedded Return Channel Provide Wireless Video Provide two way wireless internet services etc Identify subscribers Protection of Broadcasting Digital Video 13 Department of Electrical Engineering Institute of Computer and Communication Engineering Wireless Multimedia Services Mobile Multimedia 2M National Cheng Kung University Tainan Taiwan 384K 64K 32K 16K 9 6K 2 4K HD Video Phone Internet Access Video Phone Database Access Remote Medical Service Video Shop e mail eBook Voice Mail eClass FTP Phone Electronic Mail
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