Mobility/Portability in ISDB-T - DiBEG

Mobility/Portability in ISDB-TSET 2007 CONGRESS23rd ,August, 2007DiBEG JAPANYasuo TAKAHASHI,(Toshiba)Yoshiki MARUYAMA(TV Asahi)Digital broadcasting experts group1

CONTENTS1. Brief technical description of Mobility/Portability inISDB-T1.1 Technologies for Portable Reception1.2 Technologies for Mobile Reception2. Products Examples2.1 Examples of Mobile/ Portable Receiver in Japanese Market3. Introduction of Mobile Application3.1 One-Seg service3.2 HDTV mobile access3.3 Emergency warning system4. Investigation for future Mobile Multimedia services4.1 One-Seg service in a subway car4.2 ISDB-Tmm2

1. Brief Technical Description of Mobility/Portabilityin ISDB-T1.1 Technologies for Portable Reception(1) Segmented Transmission and Partial ReceptionDigital terrestrial TVDigital terrestrial audio1 channel(6 MHz)13 segment430 kHz1.3 MHzPartial receptionPartialreception13 segment receiver1 segmentreceiver3 segmentreceiverWhat is “Segmented Transmission and Partial Reception3

Image of “HDTV + One-seg”in same bandwidth(Example; 1seg + 12 seg)Layer A(LDTV,Audio,Data)13segments(6MHz bandwidth)Layer B(HDTV or Multi-SDTV with Data))frequencyQPSK constellationDifference of required C/NBetween 64QAM and QPSKis about 12 dB64QAM constellation*13 segments are divided into layers, maximum number of layers is 3.*Any number of segment for each layers can be selected (totally 13 segment)*Transmission parameter sets of each layer can be set independently(In above example, modulation index of each layer are different)4

(2) What’s Merit of partial reception?What is the most importantfor portable reception?Long time operation without chargingReduce the power consumption of receiverThis is justMerit ofPartial ReceptionHow to reduce the power consumption?Decrease the signal processingspeed of receiverNarrow band receptionSolutionReduce signal Process speed1/8 of full band reception (1 MHz FFT sample frequency)5

Summary•For partial reception, signal processing speed is reduced to1/8 of wideband reception (6MHz full band)•Therefore, power consumption is extremely reduced.•Of course, video/audio signal speed is also very lowcompared to wideband reception service.•As a result, portable receiver is realized.(note) DVB-H system adopt “time slicing” technology, timedivision multiplexing of video/audio data. But, demodulationportion is same as DVB-T(wideband reception), so, powerconsumption of demodulator is not reduced.6

(Product example of Demodulator LSI)1 seg OFDM Demo.& FEC ETC90521• Concepts of development– Smaller die size by using 90nm process.– Successions of the technology of TC90501.• Low power consumption.• All demodulation circuits are implemented by hardware. (No hostoperation is needed except initial register settings by I2C.)– Technology improvements from TC90501• Performance of mobile reception.• High speed channel changing.• Functions– Partial reception of digital terrestrial television.– 1 segment reception of digital terrestrial radio.• Supply voltages– Logic/Analog゙:1.2V, I/O:1.8 to 3.3V• Package– Bare chipUnder Mass Production7Confidential

1.2 Technologies for Mobile Reception(1) Time Interleaveno time interleavefrequencyTransmittersidetimeTransmittingdelayfield strengthvariedError symbolreceiver side(After de-interleave)With time interleaveReceiving delaytimeBurst errorError randomizedEffect of time interleave8

C/Neq [dB] (Carrie to Equivalent Gaussian Noise)Example of Test Result for Time Interleave•How much improved by using Time- Interleave1614121086420-2-4-6-8-10Following graph shows degradation by impulse noise, which is dedicated byMackenzie Presbyterian University measured in Autumn , 20050 50 100 150 200 250 300 350 400 450 500DVB-TATSC(7dB improved!)ISDB-T-12Pulse Width [µs]ATSC Latest Generation - 19.39Mbps-8 VSB 2/3 ATSC Previous Generation - 19.39Mbps-8 VSB 2/3DVB Latest Generation - 19.3Mbps-64QAM 8k 3/4 1/16 DVB Previous Generation - 19.3Mbps-64QAM 8k 3/4 1/16ISDB Latest Generation - 19.3Mbps - 64QAM 8k 3/4 1/16 0,2s ISDB Previous Generation - 19.3Mbps - 64QAM 8k 3/4 1/16 0,2s7dB improved Transmitter power reduced to 1/5 !!9

(2) Diversity Reception TechnologyImage of Diversity ReceptionRipples are generated becauseof multipath reception.DirectwaveReflected wave(Multipath)RFTunerRFTunerFFTFFTChannelEstimation andEqualizationChannelEstimation andEqualizationSelectingorCombiningDe-mapping10

RFTunerFFTChannelEstimation andEqualizationRFTunerFFTChannelEstimation andEqualizationRFTunerFFTChannelEstimation andEqualizationCombiningRFTunerFFTChannelEstimation andEqualizationDemappingFECTSBlock diagram of 4 Diversity Reception System11

Correct reception rate [%]1008060402064QAM-OFDMCoding rate = 3/44-branch2-branch1-branch040 50 60 70 80Field strength : E [dBuV/m](note) this data is dedicated by NHK laboratoryExample of Field Test Result for Diversity Reception12

(Product example of Demodulator LSI)(3) 4-branch Diversity OFDM TC90504IXBG• Concept of development– 4ch diversity reception• Built-in 4ch ADC and 4ch FFT circuit– High performance at the mobile reception• Combining 4ch FFT output– Small Package• 13x13mm BGA package• Integrated design– Built-in DRAM for de-interleave– CMOS 90nm embedded DRAM• Feature– Wide(13seg) and narrow(1,3seg) band reception– Partial reception• Power Supply– Logic :1.2V(typ.)– Analog :2.5V(typ.)– I/O :3.3V(typ.)• Package– PFBGA177-1313-0.89• Temperature range– -30 to 85 degCPFBGA177-1313-0.80Under Mass Production13Confidential

2. Product Examples2.1 Examples of Mobile/ Portable Receiver in Japanese Market13 SegmentsService Image of ISDB-TTV stationSupport 3 reception typeby one channelFixed Reception13 segmentHDTVMobile/Handheld ReceptionHome Receiver13/1 segmentCommunication/Internet1 segment(diversity reception)Communication carrierHandheld terminalReceiver in Vehicle14

■Fixed ReceiversPDP TVPDP-A427HXVIERA TH-42PZ700SK Wooo P42-HR01Panasonic HITACHI PioneerLCD TVSDTVREGZA 42H3000TOSHIBAAQUOS LC-42RX1W VIERA TH-20LX70 VIERA TH-15LD70SHARP Panasonic PanasonicBRAVIA KDL-40V2500SONYLCD-32HR100SANYOAQUOS LC-16E1SHARPAQUOS LC-13SX7SHARP15

■Fixed Receivers(Cont.)HDD/DVD RecorderBlu-rayRDZ-D800SONYDIGA DMR-XW51PanasonicBDZ-V9SONYVARDIA RD-S600TOSHIBADVR-DV635MITSUBISHIDIGA DMR-BW200PanasonicSTBCable STBTU-MHD600PanasonicDT400MASPROTZ-DCH1800Panasonic16

■Fixed Receivers(Cont.)Desktop PC20 inch(1680x1050)20.1 inch(1680x1050)20.1 inch(1680x1050)VALUESTAR S VS770/JGNECFMV-DESKPOWER LX70W/DFUJITSUPrius One type W AW37W5UHITACHINotebook PC(medium-large size)15.4 inch(1280x800)17 inch(1440x900)17 inch(1920x1200)LaVie L LL970/HGFMV-BIBLO NX95W/DQosmio G40/95CNECFUJITSUTOSHIBA17

■In-car ReceiversNavigation SystemFull-Seg/One-SegTuner separated modelPortable Navigation DeviceOne-Seg OnlyStrada CN-HDS965TDPanasonicAVIC-VH099GPioneerMini GORILLANV-SD10DTSANYOAll-in-one modelOne-Seg Only※Full-Seg is OptionalIn-Car TVOne-Seg OnlyHS706D-ANISSAN/SANYOGORILLA NV-HD830DTSANYOCAV-TD85D1SANYO18

■Portable ReceiversCell PhoneOne-Seg OnlyW51SAP903iTV911SHW52TD903iTV911Tau NTT DoCoMo Softbank14 models are availableat the end of May, 20074 models are availableat the end of May, 20073 models are availableat the end of May, 200719

■Portable Receivers(Cont.)One-Seg OnlyDVD PlayerLaptopAdapters(USB, etc.)DVD-LX87PanasonicDVD-HP700NDSANYOVAIO type TSONYMany products are on sale.BUFFALO, I・O DATA, etc.Audio PlayerDictionaryPortable TVgigabeat V30ETOSHIBAPapyrus PW-TC900SHARPXDV-100SONY20

3. Introduction of Mobile Application3.1 One-Seg service3.2 HDTV mobile access3.3 Emergency warning system21

One-Segservice (1) One-Seg is abbreviation for “one segment service” . One-Seglaunched on April 1,2006 . More than 8.4 million receivers were shippedaccording to JEITA statistics of Jul.2007.Domestic Shipments of One-Segreceiversx00018001600140012008,4milion1000X 1000M-08A-08M-08F-08J-08D-07N-07O-07S-07A-07J-07800600400200022

One-Segservice (2)On-air On-air programprogramData Dataserviceservice Video (H.264)approx. 180-256256kbps Audio (AAC-SBR)approx. 32-64kbps Data-cast (BML)approx. 20-80kbps23

One-Seg service (3)Example of business modelsTV shoppingThe service enables viewers to purchase commercial goods shownon shopping program. Local serviceThe service can provide local information such as emergency alerts,local events, notice from local government or hospital.Coupon ticketService enables to get coupon tickets such as grommet ,movie,book.Additional information serviceThe additional information linked to on-air programs aresupplement service such as information on athletes and celebrities,es,recipes, questionnaire and answer to a quiz.24

HDTV mobile access (1)HDTV can be watched even in a moving vehicle,by using space diversity technology.Reflected WaveDirect WaveMoving Vehicle25

Receiving levelHDTV mobile access (2)Diversity reception systemSpectrumTime →SP: Scattered PilotBranch#1Branch#2Branch#3Branch#4TunerTunerTunerTunerFFTFFTFFTFFTSPChannelestimateDiversitycombinerWeightMaximum RatioCombiningwith carrier by carrierof OFDM signalStable outputsignal26

HDTV mobile access (3)Comparison test on HD mobile accessDigital broadcastingAnalog broadcasting27

HDTV mobile access (4)HDTV tuner for automobiles is now on sale.Digital terrestrial televisionbroadcasting tuner forautomobilesLCD for automobilesHigh quality image wide-LCD panel.Faithful reproduction of DVD and digitalterrestrial television broadcasting image28

HDTV mobile access (5)HDTV tuner for automobiles is now on sale.SANYO NVP-DTA10Panasonic TU-DTV100, TU-DTV20Mitsubishi TU-100DFujitsu Ten DTV105Pioneer GEX-P7DTVAlpine TUE-T30029

Emergency Warning SystemEmergency warning system (EWS) is to transmit the disasterinformation such as alert sound and activation signal to public viatelevision OA wave.EWS has been operated since September 1985 in Japan.AutomaticActivationMeteorologicalAgencyAlertEWSBroadcastingStationTransmitterBroadcasting Service Area30

4. Investigation for future Mobile Multimedia services4.1 One-Segservice in a subway car4.2 ISDB-T T mm31

One-Segservice in a subway car (1)SFP ( Subway Filling Project) is organized by 6 majorbroadcasters, Hitachi, Panasonic, Sanyo and TokyoMetropolitanSubway. SFP carried out a One-Segaccess test in a subway car on the underground tunnelin March 2006.One-segservice in the subway car is beneficialfor passengers due to receive emergencyinformation in the case of disasters.32

One-Segservice in a subway car (2)Two methods to receive One-SegbroadcastingDeployment of multiple re-transmittersLaying LCX, leakage coaxial cableImage of LCXfunctionOn-air waveLCXHoleConcept of LCXRF PA33

1 0 1 1 0 ・ ・ ・One-Segservice in a subway car (3)Conceptual diagram on the test methodsE/OO/EOptical cableRF PATX TX TX TXLCX MethodRe-transmitter Method34

One-Segservice in a subway car (4)ConclusionMore than 80% of reception rate wasaccomplished with re-transmitters with thepower of less than 1W located 300m intervalsthrough the tunnel.The method of multiple re-transmittersis cheaper than the method of LCX.35

ISDB-T T mmWide spectrum of 1ch-12ch in VHF band and 53ch-62ch in UHFband will be vacant due to termination of analog broadcastingservice in 2011.The number of transmission stationsfor analogue TV70060050040030020010070MHz bandwidthVacantfrom201260MHz bandwidthVacantfrom2011059 60 61 621 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58(VHF)Channels (UHF)364

ISDB-T T mmJapan is now under study on beneficial use of vacantspectrum band such as 70MHz of VHF band and 60MHz ofUHF band.ISDB-Tmm, mobile multi-media, is one of powerful proposalfor new spectrum band.1 TV Ch37

ISDB-T T mmFeature of ISDB-Tmm• Based on ISDB-T• Flexibility of payload band width• All segments are enable to be assigned formobile use• New media for Multi-Channel Streaming andDownload Pay Services13 segments(6MHz)38

ISDB-T T mmISDB-Tmmservice categoryPersonalCSMobile PhoneFix receptionMobile receptionTerrestrialBSOne-SegISDB-TmmMass39

ISDB-T T mmISDB-T Mobile Multimedia Forum• Driving force to develop ISDB-Tmm system• After switch over of analog terrestrial, Forumexpects some spectrum to be assigned for newmobile DTT service.• Over 60 companies are joined ISDB-T MMF• Established Dec. 21 st 2006.40

ISDB-T T MMF Memberssteering board membersFuji Television Network, Inc.NIPPON TELEVISION NETWORK CORPORATIONTOKYO BROADCASTING SYSTEM, INCORPORATEDITOCHU CorporationSumitomo CorporationSKY Perfect Communications Inc.MULTIMEDIA BROADCASTING PLANNING LLCDENTSU INC.TV Asahi CorporationmembersRF RADIO NIPPON CO.,LTD.ASATSU-DK INC.Asahi Broadcasting CorporationASMIK ACE ENTERTAINMENT, INC.ITOCHU Techno-Solutions CorporationExcite Japan Co., Ltd.FM802 Co.,Ltd.Kansai Telecasting CorporationKids Station Inc.QVC Japan,lncKyodo Televison,Ltd.SANKEI LIVING SHIMBUN Inc.SANYO Electric Co., Ltd.SHARP CORPORATIONJupiter Shop Channel Co.,Ltd.Jupiter TV Co., Ltd.SPACE SHOWER NETWORKS INC.Sumisho Computer SystemsCorporationSony CorporationDaiwa Securities MediaNetworks Co.,LtdTBS Radio & Communications,Inc.dinos Inc.TV Asahi Data Vision CorporationTV TOKYO CorporationTOSHIBA CORPORATIONTomo-Digi CorporationKabushiki Kaisha NANO PIANIPPON BRAODCASTING SYSTEM,INC.NEC CorporationNIPPON TELEGRAPH ANDTELEPHONE CORPORATIONJAPAN BROADCASTINGCORPORATION(NHK)News Broadcasting Japan Co.,LtdNomura Securities Co.,Ltd.HAKUHODO DY MEDIA PARTNERSINCORPORATEDVAP inc.Pia Digital CommunicationsCorporation Inc.Forecast Communications Inc.FUJIMIC INC.FUSOSHA Publishing Inc.Nippon Cultural Broadcasting Inc.PONY CANYON INC.Mainichi Broadcasting System,Inc.Matsushita Electric Industrial Co., LtdMITSUBISHI ELECTRIC CORPORATIONMOBILE MEDIANET ,Inc.YOMIURI TELECASTING CORPORATIONRIGHTSBANK INC.RECRUIT CO.,LTD.WOWOW INC.41

Thank you for your Attention!Domo Arigato GozaimashitaDigital Broadcasting Expert Group (DiBEG)In ARIB (Association of Radio Industries and Business)http://www.dibeg.org42