Emergency Warning System for Broadcasting
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1 Presentation 5 Emergency Warning System for Broadcasting 28 th. February 1 st. March, 2007 Jakarta, Indonesia JAPAN Kenichi TSUCHIDA (NHK) 1
2 Emergency Warning System for Broadcasting Remote activation of Radio & TV ready for EWS AM, FM Radio & TV : Control and Alert Sound Digital Broadcasting (ISDB-T) : Emergency Warning Control Flag EWS has been operated since September 1985 in Japan Test signals are monthly broadcast in Japan Automatic Activation Meteorological Agency Alert EWS Broadcasting Station Transmitter Broadcasting Service Area 2
3 Emergency Warning System for Broadcasting Contents 1. Functions of broadcasting in disaster management 2. EWS for broadcasting - History 3. EWS for analogue broadcasting 4. EWS for digital broadcasting 5. Conclusion 3
4 1-1. Functions of Broadcasting in Disaster Management Gathering/receiving disaster information from administrative organizations Filtering information Delivering disaster information to the general public Broadcasting offers reliable information There are no spam information in broadcasting Always connected to everybody There are no congestions like in communication Always active : 24 hour operation Broadcasting is a ideal media to deliver disaster information 4
5 1-2. Functions of Broadcasting in Disaster Management Earthquake 00:01:00 00:02:00 00:03: points all over Japan 5
6 2. Emergency Warning System for Broadcasting in Japan - History 1980 Sep. 1,1985 Mar.18,1987 Jan.13,2007 Up to now Start of EWS study Start of EWS in Japan First EWS operation for tsunami warning Latest EWS operation for tsunami warning 15 times EWS operation during 20 years On Sep. 1, 1923, a big earthquake attacked Tokyo area and more than 100 thousand people died. It became a trigger to start radio broadcasting in Japan. Sep. 1st is the day of disaster prevention in Japan. 6
7 3-1. EWS for analogue broadcasting Transmission and Reception Program signal Switch Transmitter Program signal reception Radio Control signal generator Control Control signal reception TV Broadcasting station Receiver with warning function Alarming sound, followed by announcement 7
8 3-2. EWS for analogue broadcasting Conventional Receivers Receiver with a Clock Portable AM/FM Receiver Receiver with Power on switch were not cost effective ($60 - $130) 8
9 3-3. EWS for analogue broadcasting Low cost EWS implements Conventional transmitter Speaker Conventional Receiver ($2) Compact Disc in which EWS signals are recorded Enough for sending EWS EWS Adaptor IC* parts: ($1) *TI MSP430 Enough for receiving EWS 9
10 4-1. EWS for Digital Broadcasting ISDB-T One-Seg Services A channel slot divided into 13 ments 12 ments for HDTV services 1 ment for mobile / portable services Both services are simulcast now. ISDB-T Mobile Reception Portable Reception Fixed Reception (HDTV) 6 MHz Internet HDTV or SDTV x 2 or SDTV x 3 1 ment:mobile Portable Reception Throughput :416Kbps Modulation : QPSK (2/3) Features :Robust for Mobile Reception 12 ments : Fixed Reception (HDTV) Throughput :16.9Mbps Modulation : 64QAM(r=3/4) Features :HDTV & 5.1ch Surround Audio, Multi-channel Services 10
11 4-2. EWS for Digital Broadcasting ISDB-T One-Seg Terminals in the Market FOMA P901iTV SoftBank 905SH Laptop Computer Portable DVD player 11
12 4-3. EWS for Digital Broadcasting ISDB-T One-Seg Services EWS for ISDB systems have already been in operation in Japan as well as analog broadcast Portable EWS receivers for ISDB-T are now under development Portable receivers are expected to enlarge the opportunity to relieve disaster Technology for saving power consumption is the key EWS should be prepared by other digital broadcasting systems 12
13 4-4. EWS for Digital Broadcasting Concurrent mobile receiver activation using EWS 13
14 4-5. EWS for Digital Broadcasting EWS signal allocation in ISDB-T Transmission and Multiplexing Configuration Control (TMCC) Signal #11 Seg #0 #9 bit0 #7 #5 #3 bit26 ヘッダヘッダ Header ヘッダ Frequency One ment service (BW : 429 khz) #1 #0 #2 #4 bit203 伝送制御信号伝送制御信号伝送制御信号 Emergency Warning Signal Flag #6 #8 #10 #12 Time HDTV service (BW :: 5.6MHz) Frequency 14
15 4-6. EWS for Digital Broadcasting ISDB-T One-Seg Services & EWS Remote activation of mobile terminals by EWS is very effective. EWS bits in TMCC have to be always watched in mobile terminals. The problem is power consumption of mobile terminals Power consumption saving is required during EWS stand-by mode 15
16 4-7. EWS for Digital Broadcasting Conventional EWS stand-by Receiving Antenna Silicon Tuner 100mW One-Seg Demod 50mW Activation Control One-Seg Dec/Disp Silicon Tuner(100mW) and Demodutator(50mW) are always active Life of a Battery(3.7V,800mAh 3Wh) is only 20h(1 day) More than 200h(8 days) would be required One-Seg Portable Terminal 16
17 4-8. EWS for Digital Broadcasting Saving Power Consumption for EWS stand-by Receiving Antenna Silicon Tuner ON 10mW OFF ON OFF One-Seg Demod 5mW EWS bit Detect Activation Control One-Seg Dec/Disp One-Seg Portable Terminal Silicon Tuner(10mW) and EWS bit detector(5mw) are active only for necessary duration Life of a Battery(3.7V,800mAh 3Wh) improved to 200h(8.3 days) 17
18 4-9. EWS for Digital Broadcasting One-Seg Prototype Receiver ready for EWS with very low power consumption LCD:
19 5-1. Conclusion Broadcasting is a ideal media to deliver disaster information. EWS is a broadcasting system which remotely activates Radio & TV ready for the system. EWS for analog AM/FM radio and TV has already been in operation in Japan Preparation for EWS toward digital broadcasting Remote activation of mobile terminals by EWS is very effective. Power consumption saving is required during EWS stand-by mode. 19
20 5-2. Usage for EWS Not only Tsunami forecast But also Earthquake forecast Hurricane forecast Flood warning Eruption warning Fire warning Other warning Thank you for your attention! 20
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