DigitalDigital TerrestrialTerrestrial Broadcasting:Broadcasting: ChallengesChallenges InIn ItsIts ImplementationImplementation SET2005SET2005＠＠SSããoo PauloPaulo September 23ｒｄ ,2005 YoshikiYoshiki MaruyamaMaruyama Executive Engineer tv asahi corporation [email protected] ContentsContents ProfileProfile ofof tvtv asahiasahi NationalNational DigitalizationDigitalization ImplementationImplementation ApplicationsApplications ConclusionConclusion 2 ProfileProfile ofof tvtv asahiasahi 3 WhoWho isis tvtv asahiasahi ?? JapanJapan hashas fivefive privateprivate broadcastingbroadcasting networks.networks. tvtv asahiasahi isis aa keykey stationstation withwith aa networknetwork ofof 2323 locallocal affiliates.affiliates. 4 tvtv asahiasahi’’ss NationalNational TVTV NetworkNetwork 2424--stationstation nationalnational networknetwork Hokkaido Television Broadcasting Asahi Broadcasting Aomori Akita Asahi Broadcasting Iwate Asahi TV Yamagata Television System Higashinippon Broadcasting Niigata Television Fukushima Broadcasting Network 21 Hokuriku Asahi Broadcasting Asahi Broadcasting Nagano Yamaguchi Asahi Asahi Shizuoka Asahi Broadcasting Broadcasting Television Hiroshima Home Kyushu Asahi Television Setonaikai Broadcasting tv asahi Corp Broadcasting Nagoya Broadcasting Ehime Asahi Television Network Nagasaki Culture Telecasting Oita Asahi Broadcasting Kumamoto Asahi Broadcasting Kagoshima Ryukyu Asahi Broadcasting Broadcast 5 tvtv asahiasahi’’ss strengthstrength tvtv asahiasahi’’ss strengthstrength consistsconsists ofof (A)(A) NewsNews andand Information,Information, (B)(B) LiveLive SportsSports Coverage,Coverage, (C)(C) Variety/EntertainmentVariety/Entertainment ,, Programming.Programming. 6 NationalNational DigitalizationDigitalization 7 AdvertisingAdvertising XX dayday isis July27July27thth,2011.,2011. InIn 66 yearsyears time,time, allall TVTV setssets willwill becomebecome digitaldigital !! 8 NationalNational DigitalizationDigitalization scheduleschedule FirstFirst Phase:Phase: DecDec,,20032003 DigitalDigital transmissiontransmission inin Tokyo,Tokyo, OsakaOsaka andand NagoyaNagoya areasareas commenced.commenced. SecondSecond phase:phase: ByBy Dec,2006Dec,2006 TransmissionTransmission inin thethe remainingremaining areasareas mustmust bebe executed.executed. FinalFinal phase:phase: July,2011July,2011 AnalogueAnalogue broadcastbroadcast shallshall bebe terminatedterminated.. 9 ExpansionExpansion ScheduleSchedule DigitalDigital terrestrialterrestrial televisiontelevision broadcastingbroadcasting hashas alreadyalready commenced.commenced. already began began in Jun. 2005 will begin by Dec. 2005 will begin by Oct. 2006 will begin by Dec. 2006 10 HouseholdsHouseholds CoverageCoverage HouseholdsHouseholds CoverageCoverage (percentage(percentage ofof householdshouseholds whichwhich cancan receivereceive DTTDTTBB)) increasesincreases everyevery yearyear asas shownshown below.below. 9 In December 2004: 18 million households (38%) 9 In December 2005: 27 million households (56%) 9 In December 2006: 37 million households (77%) 48 million households in Japan. 11 ChallengeChallenge tvtv asahi,asahi, alongalong withwith otherother publicpublic andand commercialcommercial networks,networks, willwill undergoundergo digitalizationdigitalization processprocess duedue forfor completioncompletion byby 2011.2011. 12 ImplementationImplementation 13 MoveMove toto thethe newnew sitesite tv asahi’s Head Quarter moved to new site “Roppongi hills” from Ark Hills premise on Mar.2003 to secure space to install new digital facilities in addition to the analogue facilities and to commence Digital broadcasting on Dec. 1st, 2003 . Mar31st.2003 Roppongi Hills Ark Hills 14 ConstructionConstruction ofof thethe newnew buildingbuilding tvtv asahiasahi hashas installedinstalled fullfull digitaldigital broadcastingbroadcasting systemssystems forfor AnalogueAnalogue && DigitalDigital terrestrialterrestrial televisiontelevision broadcastingbroadcasting atat newnew building.building. 15 MasterMaster controlcontrol systemssystems DuringDuring thethe simulcastsimulcast periodperiod ((until July24,2011),), MasterMaster controlcontrol systemsystem operatesoperates bothboth AnalogAnalog andand DigitalDigital televisiontelevision programsprograms simultaneously.simultaneously. 16 DigitalDigital SNGSNG Digital SNG enables to send 2 HD or 4 SD programme Ku band Antenna within a 36MHz bandwidth6.4mφ ｘ２ transponder. C Band Antenna 3.6ｍφ 1GHz IF 1GHz IF 1GHz IF E/O Radio room 1GHz IF O/ E 1GHz IF SDTV SDTV SDTV SDTV IRD IRD-1 IRD-2 IRD-3 IRD-4 SDTV SDTV SDTV SDTV D&S center ＴＶＲＯ IRD-5 IRD-6 IRD-7 IRD-8 Cont &Mon ＳＮＧ－ＳＤＴＶ（ＲＸ） HDTV HDTV HDTV Cont &Mon IRD-1 IRD-2 IRD-3 ＳＮＧ－ＨＤＴＶ（ＲＸ） International International International International 1GHz IF IRD-1 IRD-2 IRD-3 IRD-4 Cont &Mon ＳＮＧ－International(ＲＸ） SDTV SDTV SDTV SDTV 140MHz IF x3 EXC-1 EXC-2 EXC-3 EXC-4 Cont &Mon ＳＮＧ－ＳＤＴＶ（ＴＸ） HDTV COD-1 Cont &Mon ＳＮＧ－ＨＤＴＶ（ＴＸ） ＳＮＧ cont & monitor Cont&Mon Cont&Mon Overall cont & monitor Distribution &satellite center 17 DigitalDigital SNGSNG Transponder allocation for Digital Satellite News Gathering OBO 0dB Digital /36MHz Bandwidth (K1～K12) QPSK/8PSK Ch4 10dB Ch1 Ch2 Ch3 OBO:[13dB] 20dB OBO:[29dB] OBO:[25dB] SMOK 30dB OBO:[31dB] 40dB ch1[IF:128.00(F0-12.00)MHz] ch3[IF:145.00(F0+5.00)MHz] MCPC1[IF:123.25(F0-16.75)MHz] ch4[IF:153.50(F0+13.50)MHz] MCPC2[IF:123.00(F0-17.00)MHz] UATｷｬﾘｱ[IF:140.75(F0+0.75)MHz] ﾄﾗﾎﾟﾝｴｯｼﾞ[IF:158.00(F0+18.00)MHz] MCPC3[IF:122.75(F0-17.25)MHz] MCPC4[IF:122.50(F0-17.50)MHz] ﾄﾗﾎﾟﾝｾﾝﾀｰ[IF:140.00(F0)MHz] DATA[IF:122.30(F0-17.70)MHz] ch2[IF:136.50(F0-3.50)MHz] PTT[IF:122.20(F0-17.80)MHz] ID[IF:122.10(F0-17.90)MHz] OBO Digital /27MHz Bandwidth (K13～K28) 0dB Ch1 Ch2 Ch3 10dB OBO:[13dB] OBO:[29dB] 20dB OBO:[25dB] 30dB OBO:[31dB] 40dB ﾄﾗﾎﾟﾝｴｯｼﾞ[F0-13.50MHz] ch1[IF:132.50(F0-7.50)MHz] ch3[IF:149.25(F0+9.25)MHz] MCPC1[IF:127.75(F0-12.25)MHz] ﾄﾗﾎﾟﾝｴｯｼﾞ[IF:153.50(F0+13.50)MHz] MCPC2[IF:127.50(F0-12.50)MHz] ch2[IF:141.00(F0+1.00)MHz] MCPC3[IF:127.25(F0-12.75)MHz] UATｷｬﾘｱ[IF:140.75(F0+0.75)MHz] DATA[IF:126.80(F0-13.20)MHz] ﾄﾗﾎﾟﾝｾﾝﾀｰ[IF:140.00(F0)MHz] PTT[IF:126.70(F0-13.30)MHz] ID[IF:126.60(F0-13.40)MHz] OBO Analogue 0dB OBO:[6dB] 10dB 20dB OBO:[26dB] 30dB OBO:[29dB] 40dB MCPC[IF:57.00(F0-12.00)MHz] UATｷｬﾘｱ[IF:70.00(F0+1.00)MHz] PTT[IF:56.50(F0-12.50)MHz] ﾌﾟﾛｸﾞﾗﾑ[IF:69.95(F0+0.95)MHz] ID[IF:56.30(F0-12.70)MHz] ﾄﾗﾎﾟﾝｾﾝﾀｰ[IF:69.00(F0)MHz] 18 Outdoor Broadcasting OBOB TrackTrack andand VanVan typetype vehiclesvehicles mustmust bebe HDHD compatiblecompatible forfor DigitalDigital TerrestrialTerrestrial Broadcasting.Broadcasting. tv asahi’s flag ship vehicle 201 / HD 101 / Mobile SNG 202 / HD 102 /HD SNG 204 / News 19 Digital ENG System parameters for HDTV/SDTV Digital Electronic News Gathering 7 – 13 Frequency Band GHz 800 MHz Channel spacing 9 18 MHz QPSK/16QAM/32QAM/ QPSK/16QAM/32QAM/ Modulation 64QAM-OFDM 64QAM, QPSK/16QAM/ Digital 32QAM/64QAM-OFDM Capacity Up to 30 (SDTV) Up to 60 (HDTV) Mbit/s Transmit feeder loss (min) 1 dB Transmit power (max) 4 (7 for 800MHz) 1.76 (QAM) / 7 (OFDM) dBW EIRP (max) 30 – 41 (11 – 16 for 800 MHz) dBW Receive feeder loss (max) 1 dB Receiver IF bandwidth 9 18 MHz Receive noise figure 4 dB Receiver thermal noise -130.5 -127.4 dBW 20 DigitalDigital TransmittersTransmitters andand AntennasAntennas TransmittersTransmitters andand antennasantennas forfor digitaldigital terrestrialterrestrial televisiontelevision broadcastingbroadcasting installedinstalled atat TokyoTokyo TowerTower inin 2003.2003. Optical fiber lines x2 STL micro wave 21 TransmittersTransmitters DigitalDigital TransmitterTransmitter systemsystem consistsconsists ofof threethree 5kw5kw transmitterstransmitters forfor redundantredundant operation.operation. OutputOutput powerpower isis 10kW.10kW. 22 Antennas TVTV stationsstations werewere confrontedconfronted withwith enormousenormous difficultiesdifficulties asas TokyoTokyo towertower diddid notnot havehave extraextra spacespace toto mountmount newnew digitaldigital TVTV antennasantennas ,6,6 metersmeters inin widthwidth andand 1212 metersmeters inin height.height. Digital TV Antennas Special observation deck 23 Antennas AA beambeam patternpattern synthesissynthesis technologytechnology realizedrealized anan omniomni directionaldirectional radiationradiation patternpattern inin compactcompact size.size. Radiation pattern 0゜ plan view 330゜ 30゜ 3 dB 300゜ 6 dB 60゜ 10 dB 15 dB cutaway view 20 dB 270゜ 90 240゜ 120゜ 210゜ 150゜ 180 24 ServiceService AreaArea ServiceService areaarea isis expandingexpanding inin TokyoTokyo area.area. Sept.Sept. 2222ndnd,200,200４４ 2nd Stage 700W (eirp=920W) Dec.1st,2005Dec.1st,2005 Final Stage 10kW TokyoTokyo TowerTower (eirp=48kW) 25 ApplicationsApplications 26 ApplicationsApplications // HDTVHDTV HighHigh DefinitionDefinition Broadcast:Broadcast: 9EuropeanEuropean broadcastersbroadcasters havehave optedopted forfor ““multimulti-- channelchannel”” strategy.strategy. 9JapaneseJapanese broadcastersbroadcasters havehave chosenchosen toto taketake advantagesadvantages ofof ““highhigh definitiondefinition”” pictures.pictures. 9 Pure HDTV : 16X9 1080i 27 ApplicationsApplications // SDTVSDTV ISDB-T utilize three different programmes within a 6MHz bandwidth channel . Multi-channel approach is presently positioned as an “experimental” and “back-up” option. SDSD--11 SDSD--22 SDSD--33 28 ApplicationsApplications // DataData broadcastingbroadcasting DataData broadcastingbroadcasting isis nownow onon service.service. 9Weather information 9News Anytime 9Results of sports games 9Information-related TV programmes Players list Other games