DVB-T2 Lite for Digital Radio by Kenneth Wenzel

Thailand's Engineering Expo 2014, November 29th
2014
DVB-T2 | T2 Lite for digital radio & TV

Content
• What does Open Channel do?
• DVB-T2 v.1.3.1 standard
oKey feature for mobile and portable reception
oThe new T2 Lite profile
• T2 Lite is perfect for broadcast TV on mobile
oHEVC
• T2 Lite - The future standard of digital radio
by Kenneth Wenzel, Director

What does Open Channel do

Independent Danish DTT Gatekeeper
• Since 2006 performing tests and operating
terrestrial digital radio & television in Copenhagen
• Currently broadcasting 3 different DTT mux in
Copenhagen, signals can be received by more than
700,000 households, representing 28% of all Danish
households.

Danish world premiere
As one of the first in Europe, Open Channel went On-Air with DVB-
T2 in * May 2010.
Open Channel again leads the way, airing the next generation of
digital radio & TV standard for mobile device, based on the new
profile T2-Lite * in March 2012 (UHF 39) and * June 2012 (VHF 9D).

Technology partner
DVB-T2 modulator T2 Gateway
Transmitter Output filters
Test equipment Network planning
Test & measurement equipment

iDTV & smartphone/tablet manufacturers
Broadcast partner

DVB-T2 standard & the new T2-Lite profile

DVB-T2 | Improved robustness
• The commercial focus on DVB-T2 was originally mainly on
stationary reception, but DVB-T2 is also designed to work well
in mobile/handheld conditions
• DVB-T does not include time interleaving and is therefore
sensitive to impulsive interference and time varying channels
• DVB-T2 has support for deep time interleaving and longer
symbol period, which together radically improves the
robustness against impulsive interference

DVB-T2 | Advantages with multiple PLPs
• Possibility to reach different kinds of receivers and
reception conditions with a single RF signal e.g.
– HDTV to roof-top directional antennas in PLPs
– Mobile receivers with robust PLPs
• Possibility to prioritize robustness for selected ”high-
priority” services -> prioritized services (e.g. public
service) will ”last longer” in bad reception conditions

DVB-T2 | Advantages with multiple PLPs
• Dynamic scheduling PLP -> statistical multiplexing
over several PLPs is possible
• PLPs may be sent in a bursty way -> allows for
power saving in mobile devices (“time slicing”)

DVB-T2 | New Bandwidth 1,7 MHz
• DVB-T2 has three additional bandwidth 1.7, 5 & 10 MHz
beside 6, 7 & 8 MHz.
• 1.7 MHz is the same frequency that Digital Audio Broadcast
(DAB) standard uses in VHF band III and L-band.

T2 Lite | New DVB-T2 profile in v1.3.1
• T2-Lite is a new ”light” version of DVB-T2 to enhance mobile
performance.
• T2-Lite is mainly a subset of DVB-T2,
except two new code rates for
robustness 1/3 and 2/5.
• Several other features, including low
bitrates (peaking at 4Mbps per PLP)
and short forward error correction
frames (16k), co-exist with these coding
rates to collectively offer a sharp
reduction in receiver power use.
• The benefit is less demand on CPU performance and power,
making it highly suitable for tablets and smartphones already
on the market today.

T2 Lite | T2-Base-Lite profile
• T2-Base-Lite is a perfect DVB-T2
profile for digital radio & mobile-TV
• L1 pre-signaling "T2_BASE_LITE"
A mode in which this bit is set to ‘1’ will
therefore be suitable for reception by
both T2-base-only and T2-lite-only
receivers.
• The significance of T2-Base-Lite for broadcasters and DTT
operator is that remove the hurdles to commercial success
with mobile DTT broadcasting without the cost for building a
dedicated network for only mobile TV.

T2 Lite is perfect for broadcast TV on mobile

Background
• DVB-H was never a success – No business case
• Very few DVB-H receivers in the market
• No demand for watching TV on a tiny cell phone screen
(QVGA, 320 x 240) - and certainly not if you had to pay for it

Bigger mobile screens - new opportunities
• With the increasing popularity of iPads since 2010 and other
tablets & smartphone, the demand for linear TV viewing on
“smaller” screens has arrived.
• The challenge with tablets and smartphones are that they
have a screen size of 1080p or 2K
• The bandwidth necessary for
unicast mobile TV can be a
challenge for mobile operators
- especially during major
sporting events.
• Here, T2-Lite (optionally in
combination with HEVC)
provides an efficient new
platform for broadcasting
SD/HD TV for mobile device.

“In car” DVB-T2 set top box - MRC diversity
• Few DVB-T2 "in car" STB on the market -> they are in fact just
ordinary stationary DVB-T2 STB with 12 volt.
• Reason for this is that the new mobile DVB-T2 | T2 Lite chip
with full MRC diversity has first been release in 2014 from
Siano (SMS4470) and from Parrot (Octopus 3).

Worldwide Radio & TV multi-standard chip

Case: Copenhagen | MUXCPH-2
• UHF channel 39 (618 MHz | 8 MHz BW)
• DVB-T2 version 1.3.1: T2-Base-Lite profile
• 8K | GI 1/8 | PP3 | 5 PLP
- PLP4: QPSK rotated | CR ½ (digital radio)
- PLP1: 16QAM rotated | CR ½ (TV prioritized serv.)
- PLP0: 64QAM rotated | CR ½ (TV)
Corresponding max. direct TX distance: 33.6 km
• Antenna site BOA:
- TDC radio tower in the center of Copenhagen
- Transmit power: 2 kW ERP omni-directional
- Antenna Height: 104 meter
- Polarization: Verticals

CPH | Signal reception quality: 618 MHz

Case: South Africa | Community TV
• DVB-T2 | 1,7 MHz BW L-band T-DAB frequency
• On Air 31th October 2013
• The Westbury Community Development Centre,
STARWAVES, ICASA and FRESH TV to launch the World’s
First self-operated Digital Community Television Transmission
with DVT-T2 / 1.7MHz in the L-Band.
• This project, issued by the Independent Communication
Authority of South Africa, (ICASA) initially demonstrated that
DVB-T2 digital community television programs can be
broadcasted in the L-Band and modest extensions to digital
television receivers allow for receiving those community
channels.

HEVC aka H.265 | New video codec

HEVC aka H.265 | Average bitrate savings
• HEVC makes it possible to broadcast mobile TV up to full
HDTV resolution (1080p < 4 Mbit/s) with T2 Lite standard.

Case: Italy | DVB-T2/HEVC STB
• Mandatory from 1st
January 2015

Case: Germany | Tender DVB-T2 & HEVC
• The German media authorities have set up a tender for the
operation of a nationwide DTT platform in DVB-T2/HEVC
standard carrying commercial TV channels.
• The tender will run from December 1st
, 2014 until January 30th
,
2015.
• The media authorities want to decide about the allocation of
the capacity in March 2015. The license will be issued for a
10-year period and can be extended for another 10 years.

T2 Lite the future standard of digital radio
• DVB-T2 is not only suitable for mobile TV.
• It is also highly suitable as the future standard of digital radio
instead of DAB (1995) & DAB+ (2007)

Worldwide digital radio standard

India | On Air with T2 radio in New Delhi

DAB+ Transmission Modes

Capacity of DAB / DAB+
• D-QPSK | GI 1/4 (246 μs) | CR 1/2
Corresponding max. direct TX distance (SFN): 73.8 km
Urban (TU12)
channel model
Netto
Mbit/s
C/N Rayleigh
(dB)
Audio
Kbit/s
Audio codec Number
of radio
DAB+ Mode 1, PL 3A* 1,056 11,8 64 HE AACv2 ~ 16
DAB Mode 1, PL 3 1,152 13,5 *** 192 Mpeg1 Layer II ~ 6
Results from simulations and laboratory measurements are given, together with
values for the noise figure of DAB receivers.
* Source: EBU BPN 101, May 2012, Report on Frequency and Network Planning
Parameters related to DAB+. Pages 6 a Gaussian type channel was assumed for
fixed reception, whereas for mobile and portable reception a Rayleigh channel
(profile TU12 at 25 km/h and 178 MHz) was assumed
** Source: EBU Tech3317 July 2007 p13 & 33: Measurements of the required C/N
for T-DAB have been made at the IRT (Institut für Rundfunktechnik) for both
mobile and portable reception using a Typical Urban (TU12) channel model. The
required C/N for mobile reception was measured to be 13.5 dB.

Comparison between T2 Lite and DAB+
A: Same propagation model as DAB+
• You get 3 times more capacity ~ 48 radios
B: Same capacity as DAB+
• The broadcasting strength, with the same propagation model
as DAB+, can be reduces 6 times with an equivalent reduction
of the transmission costs
• Or 6 times better broadcasting strength with a significantly
larger coverage.
C: Or
• With T2 Lite double capacity ~ 36 radios and 2 times better
broadcasting strength compare with DAB+ with an equivalent
reduction of the transmission costs.

T2 Lite same propagation model as DAB+
• FFT size = 8K ext | GI 1/16 (277.5 µs) | 16QAM
• With T2 Lite you get 3 times more capacity ~ 48 radios
Corresponding receiver's speed limits w/ PP4 at 200 MHz: 286 km/h
Corresponding max. direct TX distance (SFN): 83.2 km (DAB: 73.8 km)
PP4 Netto bitrate (Mbit/s) C/N Gauss** (db) C/N Rayleigh** (dB)
LDCP 64K 16K 64K 16K 64K 16K
CR 1/3 1,690 NA 7,3
CR 2/5 2,044 NA 8,2
CR 1/2 2,697 2,349 8,1 7,6 9,6 9,0
CR 3/5 3,241 3,201 9,7 10,0 11,4 11,7
CR 2/3 3,606 3,566 11,0 11,2 12,9 13,2
CR 3/4 4,057 3,931 12,1 12,4 14,5 14,9
CR 4/5 4,329 4,174 12,9 13,2 15,8 16,1
CR 5/6 4,513 4,417 13,5 13,8 16,7 17,2
Marked with pink = only T2 Lite | blue = T2-Base & T2-Lite = T2-Base-Lite profile | ** EBU Tech 3348 v4.1

T2 Lite with the same capacity as DAB+
• FFT size = 8K ext | GI 1/16 (277.5 µs) | QPSK
• With T2 Lite you get 6 times better broadcasting strength
(11,8- 4,1 ~ 7,7 dB) with a significantly larger coverage.
LDCP 64K 16K 64K 16K 64K 16K
CR 1/3 0,840 NA 2,2
CR 2/5 1,016 NA 3,1
CR 1/2 1,336 1,167 3,1 2,8 4,1 4,1
CR 3/5 1,606 1,590 4,4 4,6 5,7 6,2
CR 2/3 1,787 1,772 5,2 5,5 7,0 7,4
CR 3/4 2,010 1,953 6,2 6,4 8,3 8,7
CR 4/5 2,145 2,074 6,8 7,0 9,2 9,5
CR 5/6 2,236 2,195 7,3 7,6 10,0 10,4

Other options
• FFT size = 16K ext | GI 1/32 (277.5 µs) | 16QAM
• With T2 Lite you get double capacity ~ 36 radios and 2 times
better broadcasting strength (11,8 - 8,5 ~3,3 dB) compare with
DAB+ with an equivalent reduction of the transmission costs.
LDCP 64K 16K 64K 16K 64K 16K
CR 1/3 1.824 NA 6,8
CR 2/5 2.207 NA 7,7
CR 1/2 2,861 2,484 7,6 7,1 9,1 8,5
CR 3/5 3,438 3,384 9,2 9,5 10,9 11,2
CR 2/3 3,826 3,770 10,5 10,7 12,4 12,7
CR 3/4 4,304 4,156 11,6 11,9 14,0 14,4
CR 4/5 4,592 4,413 12,4 12,7 15,3 15,6
CR 5/6 4,788 4,670 13,0 13,3 16,2 16,7

1,7 MHz channel raster
• Remember to use silicon tuners, which are compliant with
DVB-T2 standard, which supports 1.7, 5, 6, 7 & 8 MHz BW.
• Don’t use old outdated “DVB-T1” silicon tuners, which only
supports 6, 7 and 8 MHz.
• The following silicon tuner supports 1.7 MHz channel raster:
-Sony Semiconductor CXD2861, CXD2871
-NXP NDA18271, -272, -273, -274 & -275
-Broadcom BCM3461 NIM & BCM7563 SoC
-Silicon Labs Si21x8 & Si21x7
-Rafael Microelectronics R828S
• 1,7 MHz raster within VHF band III is recommended for e.g.
the Irish Digital Terrestrial Television IRD (Saorview)

Case: Copenhagen | MUXCPH-3
• VHF channel 9D (208,064 MHz)
• T2-Base-Lite profile (DVB-T2 version 1.3.1)
• 16K Ext | GI 1/32 | PP6 | SISO
- PLP0: QPSK rotated | CR 1/3 | LDPC 16K
- C/N Rayleigh 3,6 dB
- Net bitrate 1,230 Mbit/s
- Space ~ 17 radios
• Antenna site BOA:
- TDC radio tower in the center of Copenhagen
- Transmit power: 520 W ERP; Dipol antenna
- Antenna Height: 100 meter
- Polarization: Verticals

CPH | Trimax DVB-T2 STB with 1,7 MHz BW

CPH | Signal reception quality: 208,064 MHz

Case: Thailand | Roadmap

Case: Thailand | Digital radio roadmap trial
Plan A Plan B
Standard DAB+ DAB+
C/N Rayleigh 11,8 dB 11,8 dB
Capacity kbit/s 1.056 1.056
# radio pr mux 16 16
Schedule Trial ’15
Population
coverage
10+1 city 95%
# national mux 3 4
# national radio 48 64
# local mux (39) None 4
# radio pr. areas None 64
# local radio None 2.496
The digital radio roadmap comprises Plan A
for the short term and Plan B for the long
term. Plan A is scheduled to launch trial
services by the year-end 2014.

Case: Thailand | We suggest a T2 Lite trial.
Plan A Plan B DVB-T2
Standard DAB+ DAB+ T2 Lite
C/N Rayleigh 11,8 dB 11,8 dB 11,7 dB
Capacity kbit/s 1.056 1.056 3,201
# radio pr mux 16 16 48
Schedule Trial ’15
Population
coverage
10+1 city 95% 95%
# national mux 3 4 4
# national radio 48 64 192
# local mux (39) None 4 4
# radio pr areas None 64 192
# local radio None 2.496 7.488
We suggest running a T2 Lite trial in parallel
with the DAB+ trial to compare and provide
the best suited technology platform for
Thailand´s digital radio.

Event: BES Expo 2015
Broadcast Engineering Society (India) is organizing its 21st
International Conference cum Exhibition on Terrestrial & Satellite
broadcasting. India, New Delhi: 15th
to 17th
January 2015.

Event: ABU Digital Broadcast Symposium ‘15
Workshop on DVB-T2: Technologies and Implementations
Malaysia, Kuala Lumpur: 2nd
March 2015

Event: DVB World 2015
DVB World is the biggest annual gathering dedicated to DVB
standards, services and technology. Attracting around 200
delegates from around the world, it offers an unequalled opportunity
to hear about the latest developments, with an emphasis on useful
information and informed analysis rather than commercial pitches.
Denmark, Copenhagen | 23rd
to 25th
March 2015

More info: DVB-T2 group at LinkedIN.com
www.linkedin.com/groups/DVBT2-151468

Thank you!
@WenzelKenneth
#DVBT2
#T2Lite
#Digitalradio
#DAB
kw@openchannel.dk
dk.linkedin.com/in/kennethwenzel

About Kenneth Wenzel
CEO and Founder, U-Media ApS, Denmark, since 1997.
Director of the U-Media subsidiary, Open Channel based in Copenhagen,
since 2006 where he and his team started DTT trials, followed by the DVB-T2
standard in 2010 as one of the first in Europe.
In 2012, as the first in the world - Kenneth Wenzel and team, launched tests
airing the next generation of mobile TV on UHF and digital radio on a so-
called T-DAB frequency, based on the new standard DVB-T2 Lite profile.
Kenneth Wenzel holds a M. Sc. from The Technical University of Denmark
(DTU).
He is a member of The Danish Business Authority Spectrum Forum, The
Danish Consumer Electronics Associations technical ERFA-group as well as
editor/manager of the DVB-T2 group at LinkedIn.
He is an innovator and entrepreneur in the digital TV & radio space, working
with new technologies, testing developing and at the forefront of DVB-T, DVB-
T2, T2 Lite developments and other new media technical platforms.

DVB-T2 Lite for Digital Radio by Kenneth Wenzel

Recommandé

Recommandé

Contenu connexe

Tendances

Tendances (20)

En vedette

En vedette (16)

Similaire à DVB-T2 Lite for Digital Radio by Kenneth Wenzel

Similaire à DVB-T2 Lite for Digital Radio by Kenneth Wenzel (20)

Plus de YOZZO

Plus de YOZZO (17)

Dernier

Dernier (20)

DVB-T2 Lite for Digital Radio by Kenneth Wenzel