cstb 2007 dvb tutorial 1iitmi
DESCRIPTION
DVB tutorialTRANSCRIPT
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))
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 222© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
From Digital TV to Mobile TV : DVB !
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 333© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 444© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
From Digital TV to Mobile TV…
I – The Long March to TV to Mobiles
From Digital TV to Mobile TV…
I – The Long March to TV to Mobiles
Gerard FARIA ([email protected])Gerard FARIA (Gerard FARIA ([email protected]@teamcast.com))
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 555© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 666© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
From Digital TV to Mobile TV…
II – DVB-T and the COFDM
From Digital TV to Mobile TV…
II – DVB-T and the COFDM
Gerard FARIA ([email protected])Gerard FARIA (Gerard FARIA ([email protected]@teamcast.com))
© 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 ?
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 888© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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 !
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 999© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
COFDM for Terrestrial Digital TV
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 101010© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 111111© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 121212© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 131313© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 141414© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
COFDM to cope with various kind of noises
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 151515© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 161616© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 171717© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
From Digital TV to Mobile TV…
III – DVB-T and Single Frequency Network
From Digital TV to Mobile TV…
III – DVB-T and Single Frequency Network
Gerard FARIA ([email protected])Gerard FARIA (Gerard FARIA ([email protected]@teamcast.com))
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 181818© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
COFDM to implement Single Frequency Networks
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 191919© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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 ...
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 202020© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
SFN Golden rules on the same frequency
DVBDVB--TTmodulatormodulator
UpUpConverterConverter
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 !
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 212121© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
SFN Golden rules at the same time
DVBDVB--TTmodulatormodulator
UpUpConverterConverter
UpUpConverterConverter
DVBDVB--TTmodulatormodulator
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 222222© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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)
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 232323© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 242424© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
From Digital TV to Mobile TV…
IV – DVB-H or TV to Mobile Handhelds
From Digital TV to Mobile TV…
IV – DVB-H or TV to Mobile Handhelds
Gerard FARIA ([email protected])Gerard FARIA (Gerard FARIA ([email protected]@teamcast.com))
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 252525© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
COFDM to serve Mobile Receivers
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 262626© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 272727© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 282828© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 292929© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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.
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 303030© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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 3 (Time Sliced)
Service 4 (Time Sliced)
Service 1 (not Time Sliced)
e.g. MPEG2e.g. MPEG2
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 313131© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 323232© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
MPEMPEsection section
22
MPEMPEsection section
33
MPEMPEsection section
NN
FECFECsection section
11
FECFECsection section
22
FECFECsection section
FECFECsection section
nn--11
192 columns (bytes)192 columns (bytes) 64 columns (bytes)64 columns (bytes)
PADDINGPADDING
RSRS RSRS RSRS RSRS RSRS RSRS
RSRS RSRS RSRS RSRS RSRS RSRS
RSRS RSRS RSRS RSRS RSRS RSRS
RSRS RSRS RSRS RSRS RSRS RSRS
RSRS RSRS RSRS RSRS RSRS RSRS
RSRS RSRS RSRS RSRS RSRS RSRS
RSRS RSRS RSRS RSRS RSRS RSRS
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 333333© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
FEC sections: Virtual time interleave
MPEMPEDATADATAFECFEC FECFEC FECFEC FECFEC
MPEGMPEG--2 TV Service2 TV Service
MPEGMPEG--2 TV Service2 TV Service
DVBMUXDVBDVBMUXMUX
MPEGMPEG--2 TV Service2 TV Service
MPEGMPEG--2 TV Service2 TV Service
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 343434© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
Service 2IP in Section
Service 2Service 2IP in SectionIP in Section
Service 2Section in TS
Service 2Service 2Section in TSSection in TS
Service 1IP in Section
Service 1Service 1IP in SectionIP in Section
Service 1Section in TS
Service 1Service 1Section in TSSection in TS
IP datagrams of Service 3IP datagrams of Service 3IP datagrams of Service 3
Service 3IP in Section
Service 3Service 3IP in SectionIP in Section
IP datagrams of Service 2IP datagrams of Service 2IP datagrams of Service 2
TimeTimeTime
freq
uenc
y
freq
uenc
y
freq
uenc
y
DVB-H datain MPE sections
DVBDVB--H dataH datain MPE sectionsin MPE sections
IP datagrams of Service 1IP datagrams of Service 1IP datagrams of Service 1
Service 1IP in Section
Service 1Service 1IP in SectionIP in Section
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
Service 2IP in Section
Service 2Service 2IP in SectionIP in Section
Service 2Section in TS
Service 2Service 2Section in TSSection in TS
Service 3Section in TS
Service 3Service 3Section in TSSection in TS
Service 1Section in TS
Service 1Service 1Section in TSSection 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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 353535© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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)
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 363636© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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)
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 373737© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
TV to Mobiles…
A World of Standards!
Gerard FARIA ([email protected])Gerard FARIA (Gerard FARIA ([email protected]@teamcast.com))
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 383838© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
“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)
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 393939© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
TV to Mobiles…
Solutions from the Broadcast World
Gerard FARIA ([email protected])Gerard FARIA (Gerard FARIA ([email protected]@teamcast.com))
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 404040© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 414141© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 424242© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 434343© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
GuardGuardIntervalInterval
UsefulPeriodUsefulUsefulPeriodPeriod
OFDM symbolOFDM symbolOFDM symbol
FFTFFTwindowwindow
TimeTimeTime
freq
uenc
y
freq
uenc
y
freq
uenc
y
16QAM16QAM
QPSKQPSK
BPSKBPSK
CMMBCMMB
64QAM64QAM64QAM64QAM
16QAM16QAM16QAM16QAM16QAM16QAM
QPSKQPSKQPSKQPSKQPSKQPSK
DD--QPSKQPSK
FLOFLOISDBISDBDVBDVB
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 444444© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
Modulation & Framing: with Symbol Preamble
GuardInterval
GuardGuardIntervalInterval
UsefulPeriodUsefulUsefulPeriodPeriod
OFDM symbolOFDM symbolOFDM symbol
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 454545© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 464646© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
“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
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 474747© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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,
CSTB'07 - Media on the Move - DVB TutorialCSTB'07 CSTB'07 -- Media on the Move Media on the Move -- DVB TutorialDVB Tutorial 484848© Teamcast - 2007©© Teamcast Teamcast -- 20072007 5th February 20075th February 20075th February 2007
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
Paris
Rennes