Cstb 2007 Dvb Tutorial 1IitMi

CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 111© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007

Welcome to the DVB TutorialWelcome to the DVB Tutorial

Gerard FARIA ([email protected])Gerard FARIA (Gerard FARIA ([email protected]@teamcast.com))


From Digital TV to Mobile TV : DVB !


I. The Long March to “TV to Mobiles”I.I. The Long March to The Long March to ““TV to MobilesTV to Mobiles””

DVB Tutorial : From Digital TV to Mobile TV

II. DVB-T and “Coded Orthogonal Frequency Division Multiplex”II.II. DVBDVB--T and T and ““Coded Orthogonal Frequency Division MultiplexCoded Orthogonal Frequency Division Multiplex””

III. DVB-T and “Single Frequency Networks”III.III. DVBDVB--T and T and ““Single Frequency NetworksSingle Frequency Networks””

IV. DVB-H or “TV to Mobile Handhelds”IV.IV. DVBDVB--H or H or ““TV to Mobile HandheldsTV to Mobile Handhelds””

V. TV to Mobiles : “a World of Standards”V.V. TV to Mobiles : TV to Mobiles : ““a World of Standardsa World of Standards””

AGENDAAGENDAAGENDA


From Digital TV to Mobile TV…

I – The Long March to TV to Mobiles


I – The Long March to TV to Mobiles



From PAL (SECAM) / NTSC to Mobile TV:17 years of evolution

19901990 19911991 19921992 19931993 19941994 19951995 19961996 19971997 19981998 19991999 20002000 20012001 20022002 20032003 20042004 20052005 20062006 20072007

19901990 19911991 19921992 19931993 19941994 19951995 19961996 19971997 19981998 19991999 20002000 20012001 20022002 20032003 20042004 20052005 20062006 20072007

19901990 19911991 19921992 19931993 19941994 19951995 19961996 19971997 19981998 19991999 20002000 20012001 20022002 20032003 20042004 20052005 20062006 20072007

ELGELG DVB (1.0)DVB (1.0)

12/9612/96

03/9703/97

ISDBISDB--TT03/200003/2000

ISDBISDB--SS05/200105/2001

DVB (2.0)DVB (2.0)

(more @ www.dvb.org)

(more @ www.atsc.org)

(more @ www.arib.or.jp)

19901990 19911991 19921992 19931993 19941994 19951995 19961996 19971997 19981998 19991999 20002000 20012001 20022002 20032003 20042004 20052005 20062006 20072007

DMB-T10/2006

DMBDMB--TT10/200610/2006

CMMB04/2007

CMMBCMMB04/200704/2007

FLO04/2006

FLOFLO04/200604/2006

SARFTSARFTMIIMII



II – DVB-T and the COFDM


II – DVB-T and the COFDM


© Teamcast - 2007©© Teamcast Teamcast -- 20072007

DIGITAL TERRESTRIAL BROADCASTDIGITAL TERRESTRIAL BROADCAST

Terrestrial Broadcast induces multi-pathes and Doppler effects (if movements) : COFDM is the response to cope with these impairments !

Distant transmitter

Nearest transmitter

Among the available Digital Broadcasting standards, three are based on the Coded Orthogonal Frequency Division Multiplex modulation.... Why ?


How to manage reception of such signal ?How to manage reception of such signal ?

COFDM is the solution to cope with selective and time-variant frequency fading !


COFDM for Terrestrial Digital TV


GuardIntervalGuardGuard

IntervalIntervalUsefulPeriodUsefulUsefulPeriodPeriod

OFDM symbolOFDM symbolOFDM symbolOrthogonalCarrierSpacing

OrthogonalOrthogonalCarrierCarrierSpacingSpacing

DVB-T: the transmission frame

TimeTimeTime

freq

uenc

y

freq

uenc

y

freq

uenc

y

1 – A grid of Time-Frequency cells equipped with Orthogonal carriers & Guard Interval

Guard Interval is this “necessary evil” which consumes transmission capacities,respectively 25%, 12.5%, 6.25%, 3.12% for GI= 1/4, 1/8, 1/16, 1/32

OffersOffersthetheSAMESAMEBitrateBitraterange !range !

2K2K

4K4K

8K8K


GuardIntervalGuardGuard

IntervalIntervalUsefulPeriodUsefulUsefulPeriodPeriod

OFDM symbolOFDM symbolOFDM symbol

DVB-T: the transmission frame

TimeTimeTime

freq

uenc

y

freq

uenc

y

freq

uenc

y

2 – Add signalisation & synchronisation signal to help receivers to lock onto the symbols

Pilots & TPS consume transmission capacities (8% & 1%),But Pilots are needed for Synchronisation & Estimation of channel state !

FFTwindow

FFTFFTwindowwindow


Data to BroadcastData to Broadcast

TimeTimeTime

freq

uenc

y

freq

uenc

y

freq

uenc

y

Add protection (RS + Outer Interleaver then Add protection (RS + Outer Interleaver then ““ViterbiViterbi””))

DVB-T: the transmission frame3 – Load protected data onto sub-carriers using a physical constellation (QPSK, 16QAM, 64QAM)

FEC Protection consumes useful bitrate but allows to reconstruct lost data !Respectively 50%, 33%, 17%, 13% for 1/2, 2/3, 3/4, 5/6, 7/8


DVB-T: Various trade-off between Robustness (coverage) & Bitrate (services) !

Bitrate vs Robustness for Non-Hierarchical transmissions[Bitrate related to Constellation, Coding Rate , Guard Interval] and [C/N in AWGN, Rice, Rayleigh channels]

0 Mbps

6 Mbps

12 Mbps

18 Mbps

24 Mbps

30 Mbps

36 Mbps

1/2 2/3 3/4 5/6 7/8 1/2 2/3 3/4 5/6 7/8 1/2 2/3 3/4 5/6 7/8

Coding Rate

Tran

smitt

ed B

itrat

e

0 dB

6 dB

12 dB

18 dB

24 dB

30 dB

36 dB

Req

uire

d C

/N

1/32 1/16 1/8 1/4 AWGN RICE-20 RAYLEIGH-20

QPSK 16QAM 64QAM

DVB-T STFMarch 2006


COFDM to cope with various kind of noises


Hierarchical Transmission = Complex Constellations

Final Constellation = HP + LPFinal Constellation = HP + LPFinal Constellation = HP + LP

16QAM = QPSK over QPSK16QAM = QPSK over QPSK16QAM = QPSK over QPSK

III

QQQ

HP (MSbits)defines thequadrant

HPHP ((MSbitsMSbits))defines defines thethequadrant quadrant

LP (LSBits)position

in quadrant

LPLP ((LSBitsLSBits))positionposition

in quadrant in quadrant

Final Constellation = HP + LPFinal Constellation = HP + LPFinal Constellation = HP + LP

64QAM = 16QAM over QPSK64QAM = 16QAM over QPSK64QAM = 16QAM over QPSK

III

QQQ

HP (MSbits)defines thequadrant

HPHP ((MSbitsMSbits))defines defines thethequadrant quadrant

LP (LSBits)position

in quadrant

LPLP ((LSBitsLSBits))positionposition

in quadrant in quadrant

Second MPEG-TS(LP = 16QAM)

Second MPEGSecond MPEG--TSTS(LP = 16QAM)(LP = 16QAM)

QQQ

III

First MPEG-TS(HP = QPSK)

First MPEGFirst MPEG--TSTS(HP = QPSK)(HP = QPSK)

III

QQQ

Second MPEG-TS(LP = QPSK)

Second MPEGSecond MPEG--TSTS(LP = QPSK)(LP = QPSK)

III

QQQ

First MPEG-TS(HP = QPSK)

First MPEGFirst MPEG--TSTS(HP = QPSK)(HP = QPSK)

III

QQQ


Hierarchical Transmission : HD + SD

Q

I

HP

Q

I

HPLP

HP StreamQPSK

8 Mb/s

HP StreamHP StreamQPSKQPSK

8 Mb/s8 Mb/s

LP Stream16-QAM20 Mb/s

LP StreamLP Stream1616--QAMQAM20 Mb/s20 Mb/s

Hierarchical - 64QAM - GI=1/32 - CRLP=3/4 - CRHP=1/2

d1 d2

SDTVSDTVHDTVHDTV



III – DVB-T and Single Frequency Network


III – DVB-T and Single Frequency Network



COFDM to implement Single Frequency Networks


Channel Impulse ResponseChannel Impulse Response Channel SpectrumChannel Spectrum

To make receivers working with SFN signals, all transmitters invTo make receivers working with SFN signals, all transmitters involved olved in the Single Frequency Network shall comply the in the Single Frequency Network shall comply the ““SFN Golden RulesSFN Golden Rules”” ::

To radiateTo radiate. on the. on the SAME FREQUENCY,SAME FREQUENCY,. at the. at the SAME TIME,SAME TIME,. the . the SAME DATA SAME DATA BIT(sBIT(s).).

SFN, the receivers point of view ...


SFN Golden rules on the same frequency

DVBDVB--TTmodulatormodulator

UpUpConverterConverter


DVBDVB--TTmodulatormodulatorDVB-T

receiverDVBDVB--TT

receiverreceiver

frequencyfrequencyfrequency

frequencyfrequencyfrequency

GPS10 Mhz

GPSGPS10 Mhz10 Mhz

GPS10 Mhz

GPSGPS10 Mhz10 Mhz

F0 in few Hertz !F0 in few Hertz !


SFN Golden rules at the same time





TimeTimeTime

TimeTimeTime

GPS1 ppsGPSGPS

1 1 ppsppsGPS

1 ppsGPSGPS

1 1 ppspps

DistributionNetwork

DistributionDistributionNetworkNetwork

T0 in few Microseconds !T0 in few Microseconds !

DVB-TreceiverDVBDVB--TT

receiverreceiver


Time-Stamps are inserted in the Transport Stream

TimeStampsTimeStampsInsertionInsertion

AtAtMultiplexer SiteMultiplexer Site

TimeStampsTimeStamps ExtractionExtractionand phase and phase alignmentalignment

AtAtTransmitterTransmitter SitesSites

DELAY to RADIATE adjusted to the longest PATH DELAYDELAY to RADIATE DELAY to RADIATE adjustedadjusted to the to the longestlongest PATH DELAYPATH DELAY

MPEGMPEGTSTS

MIPMIP MIPMIP

DistributionNetwork

DistributionDistributionNetworkNetworkDVBDVB

MultiplexerMultiplexerSFNSFN

AdapterAdapterMPEGMPEG

TSTSMPEGMPEG

TSTS

DVBDVB--TTModulatorModulator TransmitterTransmitter

OFDMOFDMsignalsignal

MIP inserter from TeamCastMIP inserter from TeamCast

Mega-Frame Initialization Packet Specified in the ETSI TS 101 191 (DVB-SFN)MegaMega--Frame Frame InitializationInitialization PacketPacket SpecifiedSpecified in the ETSI TS 101 191 (DVBin the ETSI TS 101 191 (DVB--SFN)SFN)


SFN : Transmitters shall be synchronised

Time-Domain ConstraintFrequency-Domain Constraint

frequencyfrequency

COFDMmodulator

UpConverter

GPSReceiver

COFDMmodulator

UpConverter

GPSReceiver

COFDMmodulator

UpConverter

GPSReceiver

COFDMmodulator

UpConverter

GPSReceiver

To perform Single Frequency Networks, each transmitter shall radiate• At the same FREQUENCY,• At the same TIME,• The Same BIT,

frequencyfrequency timetime

FF in few Hertz !in few Hertz !

timetime

T T in few in few ms ms !!

FFT FFT FFT FFT



IV – DVB-H or TV to Mobile Handhelds


IV – DVB-H or TV to Mobile Handhelds



COFDM to serve Mobile Receivers


Mobile Phones must embed a lot of features

Blue Tooth(WPAN)

Blue ToothBlue Tooth(WPAN)(WPAN)

WiFi(WLAN)

WiFiWiFi(WLAN)(WLAN)

WiMax(WMAN)WiMaxWiMax

(WMAN)(WMAN)

GSM900GSMGSM900900

GSM1800GSMGSM18001800

UMTS2300UMTSUMTS23002300

CDMA800/1900

CDMACDMA800/1900800/1900

T-DMB(DAB)TT--DMBDMB(DAB)(DAB)

DVB-H(DVB)DVBDVB--HH(DVB)(DVB)

T-SS(ISDB)TT--SSSS

(ISDB)(ISDB)

DonDon’’t forget t forget THE THE

fashionable fashionable option:option:

““our elegantour elegantBACKPACKBACKPACK

to carry to carry batterybattery””

“Terre

strial B

road

cast W

orld

”““ T

erre

strial B

road

cast W

orld

Terre

strial B

road

cast W

orld

””

FMRadioFMFM

RadioRadioGPSGPSGPS

“Wir

ele

ss N

etw

ork

Wo

rld

”““ W

irele

ss N

etw

ork

Wo

rld

Wir

ele

ss N

etw

ork

Wo

rld

””“Mobile Telecom World”““Mobile Telecom WorldMobile Telecom World””

MP3PlayerMP3MP3

PlayerPlayer


Power consumption is THE key issue

0.4

0.6

0.2

RF + Mobile DVB-T Dem.Mobile DVB-T Demodulator

Pd [W]

0.8

1.0

1.2

2003 2004 2005 2006

1.´4

Fixed DVB-T Demodulator

1.3 V / 0.13 u

1.8 V / 0.18 u

1.1 V / 0.11 u0.9 V / 0.09 u

0.9 W

1.3 W

0.73 W

0.6 W

Target <100 mW

Power Consumption of DVB-T

TIME SLICING is THE solution for power savingTIME SLICING is THE solution for power saving


DVB-H targets Handheld “Battery Powered” TerminalsDVB-H targets Handheld “Battery Powered” TerminalsEvery

Tim

e,

Every

Wh

ere

(No

mad

ic)

Every

Every

Tim

e,

Tim

e, Every

Every

Wh

ere

Wh

ere

(( No

mad

icN

om

ad

ic))

AT H

OM

E(F

ix)

AT H

OM

EA

T H

OM

E(( F

ixFix

))

On

th

e

Mo

ve

(Mo

bile)

On

th

e

On

th

e

Mo

ve

Mo

ve

(Mo

bile)

(Mo

bile) HTHT

HH

HTHT


DVB-H provides technical features spread over layersDVB-H provides technical features spread over layers

Time Time SlicingSlicing

FEC FEC

(Reed (Reed SolomonSolomon))

4K 4K fftfft(8K, 2K)(8K, 2K)

"4k/8k"@4k

”8k”@8k

EnhancedEnhancedTPSTPS

signalingsignaling

"2k/8k"@2k

Time Slicing: a transmission method to allow battery saving in receivers, Time SlicingTime Slicing: a transmission method to allow battery : a transmission method to allow battery saving in receivers, saving in receivers,

MPE-FEC: an additional protection at the DATA link layer level,MPEMPE--FECFEC: an additional protection at the DATA link : an additional protection at the DATA link layer level,layer level,

4K: a new trade-off (coverage vs speed) for network planning flexibility,

TPS : signalling data in the channel to speed-up DVB-H services discovery,

4K4K: a new trade: a new trade--off (coverage off (coverage vsvs speed) for network speed) for network planning flexibility,planning flexibility,

TPS TPS : signalling data in the channel to speed: signalling data in the channel to speed--up DVBup DVB--H services discovery,H services discovery,

In-depth interleaver: a free feature to improve impulse noise resilience for 2K & 4K transmissions.InIn--depth interleaverdepth interleaver: a free feature to improve : a free feature to improve impulse noise resilience for 2K & 4K transmissions.impulse noise resilience for 2K & 4K transmissions.


Time Slicing: a feature for Receivers

Time Sliced and nonTime Sliced and non--Time Sliced services can share the same DVB multiplex,Time Sliced services can share the same DVB multiplex,

90% power saving for the front90% power saving for the front--end can easily be achieved,end can easily be achieved,

TimeTime--Slicing allows uninterrupted service receptionSlicing allows uninterrupted service reception

Service 2 (Time Sliced)



Service 1 (not Time Sliced)

e.g. MPEG2e.g. MPEG2


Time Slicing for efficient power saving

Time between bursts (off time) gives the power saving.Time between bursts (off time) gives the power saving.

Off time length depends on used service and burst bit rates.Off time length depends on used service and burst bit rates.

burst bitrate(Mbps)

2 4 6 8 10 12 14

80%

60%

40%

20%

Service bitrate 350 kbps

Burst size 2 Mb

Service bitrate 1 Mbps

Service bitrate 100 kbps

Synchronization time 250 ms

100%

Delta-t Jitter 10 ms


DVB-H : MPE-FEC Transmission SchemeDVB-H : MPE-FEC Transmission Scheme

FEC FrameFEC FrameApplication FrameApplication Frame

IPIPH

eader

Head

erIPIP

Data

gra

m 1

Data

gra

m 1

IPIPH

eader

Head

erIP IP

Data

gra

m 2

Data

gra

m 2

IPIPD

ata

gra

m 4

Data

gra

m 4

IPIPH

eader

Head

er

IP IP

Data

gra

m n

Data

gra

m n

IPIPH

eader

Head

erPad

din

gPad

din

g

Paddin

g (=

00)

Paddin

g (=

00)

RS code word on Row 0RS code word on Row 0

RS code word on Row 1RS code word on Row 1

RS code word on Row nRS code word on Row n

RS code word on Row nRS code word on Row n--11

IP IP

Data

gra

m 3

Data

gra

m 3

IPIPH

eader

Head

er

IP IP

Data

gra

m 3

Data

gra

m 3

EtcEtc……

EtcEtc……

To TS To TS packetpacketslicerslicer

MPEMPEsection section

11


22


33


NN

FECFECsection section

11


22



nn--11

192 columns (bytes)192 columns (bytes) 64 columns (bytes)64 columns (bytes)

PADDINGPADDING

RSRS RSRS RSRS RSRS RSRS RSRS








RS

colu

mn

1R

S co

lum

n 1

RS

colu

mn

2R

S co

lum

n 2

Etc

Etc

……

Etc

Etc

……

RS

colu

mn

nR

S co

lum

n n

-- 11

RS

colu

mn

nR

S co

lum

n n

PUNCTUNRINGPUNCTUNRING


FEC sections: Virtual time interleave

MPEMPEDATADATAFECFEC FECFEC FECFEC FECFEC

MPEGMPEG--2 TV Service2 TV Service


DVBMUXDVBDVBMUXMUX



DVBDVB--H IPH IPencapsulatorencapsulator

MPEMPEDATADATA

MPEMPEFECFEC

TimeTimeSlicingSlicing

IPIP

DVB-TModulator

ETS 300 744

DVBDVB--TTModulatorModulator

ETS 300 744ETS 300 744

TSTS

Virtual Time Interleave :bytes belonging to same RS codeword

are distributed in time

Virtual Virtual Time Interleave :Time Interleave :bytesbytes belonging belonging to to samesame RS RS codeword codeword

are distributedare distributed in in timetime

DATA are transmitted in traditional MPE sections:

DVB-H ignorant receiver decodes them even “time-sliced”

FEC bytes are transmitted in NEW Sections:

DVB-H ignorant receiver will simply ignores them

MPE-FEC support is not mandatory to receive DVB-H

DATA are transmitted in traditional MPE sections:DATA are transmitted in traditional MPE sections:

DVBDVB--H ignorant receiver decodes them even H ignorant receiver decodes them even ““timetime--slicedsliced””

FEC bytes are transmitted in NEW Sections:FEC bytes are transmitted in NEW Sections:

DVBDVB--H ignorant receiver will simply ignores themH ignorant receiver will simply ignores them

MPEMPE--FEC support is not mandatory to receive DVBFEC support is not mandatory to receive DVB--HH


DVB-H Transmission Processing « at a glance »

Service 3IP in Section

Service 3Service 3IP in SectionIP in Section

Service 3Section in TS

Service 3Service 3Section in TSSection in TS









IP datagrams of Service 3IP datagrams of Service 3IP datagrams of Service 3




TimeTimeTime

freq

uenc

y

freq

uenc

y

freq

uenc

y

DVB-H datain MPE sections

DVBDVB--H dataH datain MPE sectionsin MPE sections




DVB-H dataat IP level

DVBDVB--H dataH dataatat IP IP levellevel

DVB-H MPE-datasections in TS

DVBDVB--H MPEH MPE--datadatasections in TSsections in TS









Time-Sliced BurstService 2

TimeTime--SlicedSliced BurstBurstService 2Service 2

Time-Sliced BurstService 2

TimeTime--SlicedSliced BurstBurstService 2Service 2

TS ontoOFDM

TS ontoTS ontoOFDMOFDM


DVB-H improves highly Mobile Receiver Performances

DVB-T vs DVB-H(8K - gi 1/4 - 16QAM 2/3 - MPE-FEC 3/4)

13,27 Mbps

0,0 dB

10,0 dB

20,0 dB

30,0 dB

40,0 dB

50,0 dB

0 Hz 1 Hz 10 Hz 100 Hz 1000 Hz

DVB-H @ FER 5%

DVB-H @ MFER 5%

DVB-T "Rayleigh"

470 MHz UHF Band IV (21)

854 MHz UHF Band V (69)

470 MHz UHF Band IV (21)470 MHz UHF Band IV (21)

854 MHz UHF Band V (69)854 MHz UHF Band V (69)

1 km/h

0,4 km/h

1 km/h1 km/h

0,4 km/h0,4 km/h

2 km/h

1 km/h

2 km/h2 km/h

1 km/h1 km/h

7 km/h

4 km/h

7 km/h7 km/h

4 km/h4 km/h

23 km/h

13 km/h

23 km/h23 km/h

13 km/h13 km/h

69 km/h

38 km/h

69 km/h69 km/h

38 km/h38 km/h

230 km/h

126 km/h

230 km/h230 km/h

126 km/h126 km/h

689 km/h

379 km/h

689 km/h689 km/h

379 km/h379 km/hTU6TU6TU6

Flat Behaviour

Up to Max Speed

Flat BehaviourFlat Behaviour

Up to Max SpeedUp to Max Speed

QPSK 1/2 (5 Mbps)QPSK 1/2 (5 Mbps)

16QAM 2/3 (13 Mbps)16QAM 2/3 (13 Mbps)

DVBDVB--TTMobileMobilePenaltyPenalty

6 to 12 dB6 to 12 dB

DVBDVB--H GainH GainAreaArea

DVB-HMPE-FECGAIN :

2 to 5 dB (Pedestrian)

DVBDVB--HHMPEMPE--FECFECGAIN :GAIN :

2 to 5 dB 2 to 5 dB (Pedestrian)(Pedestrian)

64QAM 2/3 (20 Mbps)64QAM 2/3 (20 Mbps)

Christian AndreasChristian Andreas

DOPPLERDOPPLER(1803(1803--1853)1853)

)cos(Φ∗∗=∆Cf

Vf rfD

DVB-HMPE-FECGAIN :

5 to 9 dB (Mobile)

DVBDVB--HHMPEMPE--FECFECGAIN :GAIN :

5 to 9 dB 5 to 9 dB (Mobile)(Mobile)


But “TV to Mobiles” drives to new Coverage challenge!

Digital TVtransmitterDigital TVtransmitter

FOR FIX FOR FIX RECEPTION:RECEPTION:

Field StrengthField Strengthis Plannedis Planned

to offer theto offer theC/N thresholdC/N threshold

at 10 metersat 10 metersabove theabove the

Ground LevelGround Level

But for NOMADICBut for NOMADICRECEPTION:RECEPTION:

Field StrengthField StrengthShall be Shall be

available available At 1.5 meterAt 1.5 meter

Above Ground.Above Ground.

PENALTY: 12 dBPENALTY: 12 dB(for Outdoor Rx)(for Outdoor Rx)

Broadcast to NOMADIC Handhelds Terminals :Broadcast to NOMADIC Handhelds Terminals :. Ground level penalty . Ground level penalty = = --12 dB12 dB. Indoor penalty . Indoor penalty = = -- 8 dB8 dB. Mobile penalty (. Mobile penalty (Outcar/IncarOutcar/Incar)) = = -- 8 dB / 8 dB / -- 16 dB16 dB

Building Penetration LossBuilding Penetration Loss

PENALTY: 8 dBPENALTY: 8 dB(for Indoor Rx)(for Indoor Rx)

MobilityMobility

PENALTY : 8 dB (PENALTY : 8 dB (OutcarOutcar antenna) antenna) PENALTY : 16 dB (PENALTY : 16 dB (IncarIncar antenna)antenna)


TV to Mobiles…

A World of Standards!



“TV to Handhelds”: a World of Standards

ISDB-T(OneSeg)

ISDBISDB--TT((OneSegOneSeg))

CDMB(DTMB / DMB-T)

CDMBCDMB(DTMB / DMB(DTMB / DMB--T)T)

DVB-H(DVB-T)

DVBDVB--HH(DVB(DVB--T)T)

MediaFLO(Qualcomm)

MediaFLOMediaFLO(Qualcomm)(Qualcomm)

T-DMB(S-DMB)

TT--DMBDMB(S(S--DMB)DMB)

CMMB(sTiMi)

CMMBCMMB((sTiMisTiMi))

S-DMB(T-DMB)

SS--DMBDMB(T(T--DMB)DMB)

UMTSMBMS / HSDPA

UMTSUMTSMBMS / HSDPAMBMS / HSDPA

GSM(GPRS)

GSMGSM(GPRS)(GPRS)

AboveAbove1 GHz1 GHz

BelowBelow1 GHz1 GHz

DVB-SH(DVB-H)

DVBDVB--SHSH(DVB(DVB--H)H)


TV to Mobiles…

Solutions from the Broadcast World



TRANSPORT Options : “Direct” or “TS” or “IP+TS”

MULTIMEDIA : CONTENTS / APPLICATIONS / SERVICESMULTIMEDIA : CONTENTS / APPLICATIONS / SERVICESMULTIMEDIA : CONTENTS / APPLICATIONS / SERVICES

T-DABPhysical Layer

TT--DABDABPhysical LayerPhysical Layer

DA

BD

igita

l RA

DIO

Serv

ices

DA

BD

AB

Dig

ital R

AD

IOD

igita

l RA

DIO

Serv

ices

Serv

ices

MP4-AVCMP4-BSACMP4-BIFS

MP4MP4--AVCAVCMP4MP4--BSACBSACMP4MP4--BIFSBIFS

TSTScircuitcircuit

MP4-SLMP4MP4--SLSL

MPEG-TSencapsulation

MPEGMPEG--TSTSencapsulationencapsulation

TS FEC(RS)

TS FECTS FEC(RS)(RS)

T-DMBTT--DMBDMB

TSTSTS

IPIPIP

IP: TRANSPORT ConvergenceIP: TRANSPORT ConvergenceIP: TRANSPORT Convergence

DVB-IPDC : IP DataCastSERVICE Convergence

DVBDVB--IPDC : IP IPDC : IP DataCastDataCastSERVICE ConvergenceSERVICE Convergence

DVB-HDVBDVB--HH

MP4-VMP4-AMP4-D

MP4MP4--VVMP4MP4--AAMP4MP4--DD

PacketsPacketsPackets

DRMSub System

DRMDRMSub SystemSub System

FramingSub-Channel

FramingFramingSubSub--ChannelChannel

FLO

Physical Layer

FLOFLO

Physical LayerPhysical Layer

MediaFLOMediaFLOMediaFLO

MP2-A/V/DMP4-A/V/DMP2MP2--A/V/DA/V/DMP4MP4--A/V/DA/V/D

MPEG2-MUXMPEG2MPEG2--MUXMUX

ISDB-TSingle Segment

ISDBISDB--TTSingle SegmentSingle Segment

ISDB-TISDBISDB--TT

TSTSTS

DV

B

Dig

ital T

V S

erv

ices

DV

BD

VB

Dig

ital T

V S

erv

ices

Dig

ital T

V S

erv

ices

TSTSTS

DVB-TDVBDVB--TT

IPIPIP

TSTSTSTSTSTS

DVB-SHDVBDVB--SHSH


Transmission: COFDM is everywhere!

GuardGuardIntervalInterval

UsefulUsefulPeriodPeriod

OFDM symbolOFDM symbolOrthogonalCarrierSpacing

OrthogonalOrthogonalCarrierCarrierSpacingSpacing

TimeTimeTime

freq

uenc

y

freq

uenc

y

freq

uenc

y

With OFDM,With OFDM,

BitrateBitrate isis

INDEPENDENTINDEPENDENT

Of the Of the s/cs/c numbernumber

2K2K

4K4K

8K8K

1K1K

4K4K

2/8 MHz2/8 MHz

CMMBCMMB

4K4K

SCSC

6/7/8 6/7/8 MHzMHz

CDMBCDMB

256256

512512

1K1K

2K2K2K2K2K2K

4K4K4K4K4K4K

8K8K8K8K

6/7/8 6/7/8 MHZMHZ

6/7/8 6/7/8 MHzMHz

5/6/7/8 5/6/7/8 MHzMHz1,5 MHz1,5 MHz

FLOFLOISDBISDBDVBDVBDABDAB


Frame Preamble :Frame Preamble :for Synchronisation & Signallingfor Synchronisation & Signalling with Null Symbol :with Null Symbol : DAB/TDAB/T--DMB, DMB, for Synchronisation & Signallingfor Synchronisation & Signalling without Null Symbol :without Null Symbol : FLO (TDM pilots),FLO (TDM pilots),

Modulation & Framing: with Frame Preamble

NullNullSymbolSymbol

SignallingSignallingSymbol(sSymbol(s))

SyncSyncSymbolSymbol

TimeTimeTime

freq

uenc

y

freq

uenc

y

freq

uenc

y

DD--QPSKQPSK

DABDAB

PreamblePreamble Data PayloadData Payload


Pilots spread in Frame :Pilots spread in Frame :for Synchronisation, Channel Estimation & Signalling : for Synchronisation, Channel Estimation & Signalling : DVBDVB--H, ISDBH, ISDB--T, CMMB T, CMMB for Synchronisation, Channel Estimation :for Synchronisation, Channel Estimation : FLO (FDM Pilots), FLO (FDM Pilots), for Signalling : for Signalling : CDMB or DTMB or DMBCDMB or DTMB or DMB--TH, TH,

Modulation & Framing: with Pilots

GuardInterval


UsefulPeriodUsefulUsefulPeriodPeriod


FFTFFTwindowwindow

TimeTimeTime

freq

uenc

y

freq

uenc

y

freq

uenc

y

16QAM16QAM

QPSKQPSK

BPSKBPSK

CMMBCMMB

64QAM64QAM64QAM64QAM

16QAM16QAM16QAM16QAM16QAM16QAM

QPSKQPSKQPSKQPSKQPSKQPSK

DD--QPSKQPSK

FLOFLOISDBISDBDVBDVB


Modulation & Framing: with Symbol Preamble

GuardInterval


UsefulPeriodUsefulUsefulPeriodPeriod


TimeTimeTime

freq

uenc

y

freq

uenc

y

freq

uenc

y

PNPNFFTFFT

windowwindow64QAM64QAM

32QAM32QAM

16QAM16QAM

4QAM4QAM

4QAM4QAM--NRNR

CDMBCDMB

PN sequences as OFDM symbol preamble (instead of the classical CPN sequences as OFDM symbol preamble (instead of the classical Cyclic Prefix):yclic Prefix):

for Synchronisation & Channel Estimation : for Synchronisation & Channel Estimation : CDMB or DTMB or DMBCDMB or DTMB or DMB--THTH

Signalling using a low Signalling using a low bitratebitrate channel made of pilotschannel made of pilots


FEC & Interleaving: a lot of solutions!

Data to BroadcastData to Broadcast

FECs + InterleaversFECsFECs + + InterleaversInterleavers

TimeTimeTime

freq

uenc

y

freq

uenc

y

freq

uenc

y

DMBDMB--TT DVBDVB--HH FLOFLO CDMBCDMBISDBISDB--T T (SS)(SS)

TT--DMB :DMB : DABDAB--FEC (RS + Virtual Time Interleaver) FEC (RS + Virtual Time Interleaver) + RS (MPEG) + RS (MPEG) + CC (+ CC (““ViterbiViterbi””) ) + Service Time Interleaver (384 ms)+ Service Time Interleaver (384 ms)ISDBISDB--T:T: RS (MPEG) RS (MPEG) + CC (+ CC (““ViterbiViterbi””) ) + Sub+ Sub--Band Interleaver (up to 1 second)Band Interleaver (up to 1 second)DVBDVB--H :H : MPEMPE--FEC (RS + Virtual Time Interleaver) FEC (RS + Virtual Time Interleaver) + RS/Outer Intl + RS/Outer Intl + CC/Inner Interleaver+ CC/Inner InterleaverFLO :FLO : RS RS + TURBO + TURBO + Interlaced Sub+ Interlaced Sub--channels (~250 ms)channels (~250 ms)CDMB :CDMB : BCH BCH + LDPC + LDPC + Time Interleaver (~84 ms & ~255 ms)+ Time Interleaver (~84 ms & ~255 ms)CMMB :CMMB : RS/Outer Intl RS/Outer Intl + LDPC + LDPC + 25ms slots within 1s frame+ 25ms slots within 1s frame


“TV to Mobile” : Variations around COFDM

8 MHz8 MHz2 MHz2 MHz

BPSK,BPSK,QPSK, 16QAMQPSK, 16QAM

4K (8 MHz)4K (8 MHz)1K (2 MHz)1K (2 MHz)

25ms slots25ms slotsWithin 1s frameWithin 1s frame

RS + Outer IntlRS + Outer IntlLDPCLDPC

--CMMBCMMB

6 / 7 / 8 MHz6 / 7 / 8 MHz

6 / 7 / 8 MHz6 / 7 / 8 MHz

5 / 6 / 7 / 8 MHz5 / 6 / 7 / 8 MHz

6 / 7 / 8 MHz6 / 7 / 8 MHz

1.5 MHz1.5 MHz

ChannelChannelBandwidthBandwidth

4QAM4QAM--NR, 4QAM,NR, 4QAM,1616--3232--64 QAM64 QAM

QPSK,QPSK,16QAM16QAM

QPSK,QPSK,16QAM, 64QAM16QAM, 64QAM

DD--QPSK, QPSK,QPSK, QPSK,16QAM, 64QAM16QAM, 64QAM

DD--QPSKQPSK

ModulationModulationFramingFramingTime Time InterleaveInterleave

ChannelChannelEncoderEncoder

MACMAC

SC or 4KSC or 4KSymbol PreambleSymbol Preamble

4K4KTDM & FDM PilotsTDM & FDM Pilots

8K 4K K2 8K 4K K2 PilotsPilots

8K 4K 2K8K 4K 2KPilotsPilots

2K 1K 2K 1K ½½K K ¼¼KKFrame PreambleFrame Preamble

~85 ms~85 ms~255 ms~255 ms

BCH + LDPCBCH + LDPC--CDMBCDMB

~250 ms~250 msRS + Turbo CoderRS + Turbo Coder

(Outer Interleave per service)(Outer Interleave per service)FLOFLO

--RS + Outer IntlRS + Outer IntlCC + Inner IntlCC + Inner Intl

MPEMPE--FECFEC(RS + Time Slice)(RS + Time Slice)DVBDVB--HH

Up to 1 secondUp to 1 secondRS + Outer IntlRS + Outer IntlCC + Inner IntlCC + Inner Intl

--ISDBISDB--TT

384 ms384 ms(per service)(per service)

CCCC(per service)(per service)

RS + Outer IntlRS + Outer Intl(from DVB(from DVB--T)T)DMBDMB--TT

Channel EncoderChannel Encoder OFDM modulatorOFDM modulator

iFFTiFFT

xKxK yKyK zKzK

Framing/PilotsFraming/Pilots

SIGSIGSYNCSYNCESTIMESTIM

““MACMAC””layerlayer

TSTS

OFDM demodulatorOFDM demodulator Channel DecoderChannel Decoder

TSTS

““MACMAC””layerlayer

iFFTiFFTFraming/PilotsFraming/Pilots

SIGSIG SYNCSYNCESTIMESTIM

OUTER CODINGOUTER CODING

BCBC OuterOuterIntlIntl

INNER CODINGINNER CODING

CCCC InnerInnerIntlIntl

OUTER DECODEROUTER DECODERINNER DECODERINNER DECODER

““PHYPHY””layerlayer

““PHYPHY””layerlayer

DATA FECDATA FEC DATA FECDATA FEC

TimeTimeIntlIntl

TimeTimeIntlIntl

xKxK yKyK zKzK BCBCOuterOuterIntlIntlCCCCInnerInner

IntlIntl


EasyEasy--toto--integrate, compact and truly cost integrate, compact and truly cost effective technology for transmitter and effective technology for transmitter and basebase--station manufacturers:station manufacturers:

All the essential technical bricks needed All the essential technical bricks needed to build up standard agnostic, high to build up standard agnostic, high performance transmission systems at performance transmission systems at very competitive pricing. very competitive pricing.

Further information at:Further information at: www.teamcast.comwww.teamcast.com

ModulCastModulCast®® forforTV on MobileTV on Mobile

High performance Digital TV modulators,High performance Digital TV modulators,

for Tfor T--DMB / DVBDMB / DVB--H / FLO / CDMB networks,H / FLO / CDMB networks,

Hierarchical MIP inserters for Hierarchical MIP inserters for SFNsSFNs, , Mobile DVBMobile DVB--T/T/--H antenna diversity receivers,H antenna diversity receivers,

Experimental DVBExperimental DVB--H receivers,H receivers,

Ultra Low Phase Noise Synthesizers,Ultra Low Phase Noise Synthesizers,


Gerard FARIA([email protected])

TeamCastEspace PerformanceF-35769 - SAINT GREGOIRE (FRANCE)+33 2 23 25 26 80www.teamcast.com

Gerard FARIAGerard FARIA([email protected])([email protected])

TeamCastTeamCastEspace PerformanceEspace PerformanceFF--35769 35769 -- SAINT GREGOIRE SAINT GREGOIRE (FRANCE)(FRANCE)+33 2 23 25 26 80+33 2 23 25 26 80www.teamcast.comwww.teamcast.com

Paris

Rennes

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Rennes

Documents

Cstb 2007 Dvb Tutorial 1IitMi