0500-0759 utc, 12055 khz, 90 kw drm power, hr 2/2/0.6
TRANSCRIPT
0500-0759 UTC, 12055 KHz, 90 KW DRM power, HR 2/2/0.6, Azimuth 345 degree, 22.-26.02.2009
0800-0859 UTC, 12005 KHz, 90 KW DRM power, HR 2/2/0.6, Azimuth 345 degree (regular daily DW Transmission).
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DRM : An Overview
Ms Vineeta DwivediProject Director, DRM
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ABOUT THE SPEAKER
Vineeta Dwivedi is the Project Director of Digital Radio Mondiale – the international non-profit organisation working for adoption of the DRM gloabal standard. She is a media industry professional with experience in radio broadcasting and business development.
Vineeta was BBC World Service's Business Development Manager for India, and was responsible for distribution, marketing and developing BBC's radio and online business. In this role she worked on both commercial as well non-profit making models with focus on brand promotion and new business development and has worked on a variety of distribution platforms.
She worked with the BBC in London as a radio journalist and has been a broadcaster for many years. She has made several radio documentaries and has been a presenter of various World Service programmes.
Vineeta Dwivedi graduated in Science from the University of Lucknow and completed a Masters in English from Central Institute of English and Foreign Languages, Hyderabad. She did several management programmes during her stay in London; attended the Executive Leadership Programme from Henley Management College, UK and attended the Accelerated Management Programme from Indian School of Business, Hyderabad, India.
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Abstract
Digital Radio Mondiale (DRM) has already established itself as a high quality radio broadcasting system for the bands below 30 MHz, bringing better sound quality and easy tuning. This presentation explores the development of the DRM system to include capability at higher radio frequencies, including the current FM bands.
DRM & DRM+
Mr Lindsay CornellBBC
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ABOUT THE SPEAKER
Lindsay Cornell has worked for the BBC for 20 years. He has concentrated on radio since 1993. From 2001 to 2004 he was Head of Digital Radio, BBC Radio, responsible for the roll-out of BBC national DAB services and coverage.
He is currently Principal Systems Architect for the BBC's Future Media & Technology division. He consults in the area of digital radio systems.
Lindsay is chairman of both the World DMB and the Digital Radio Mondiale (DRM) Technical Committees and. is an authority on digital radio standardisation.
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Abstract
Deutsche Welle is operating a DRM monitoring network in Europe since 2004. Purpose is the evaluation of coverage and availability of wanted target area in Central and Western Europe. The presentation gives an overview about DRM transmitter usage, monitoring network and results of multi and single frequency usage. Measurements furnished proof of high service availability.
Mr Thomas FeustelDeutsche Welle
DRM Coverage & Monitoring in Europe
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DRM Coverage & Monitoring in Europe
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ABOUT THE SPEAKER
Thomas Feustel is working as engineer at Germany's international broadcaster Deutsche Welle. He started with software development and management of several projects. He is involved actively in migration of shortwave services to Digital Radio Mondiale (DRM) system for many years. At present he is head of terrestrial transmission and responsible for frequency and transmitter usage.
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Abstract
Mass communication media continues to evolve with the widespread implementation of advanced digital technologies. Broadcasters and audiences have a wide choice of platforms, and can select their favourite at will. Digital AM, known under the brand name of DRM, is one of these exciting new digital platforms.
In fact, among all the mass communication media, Digital AM, or DRM, is the most cost-efficient, secure and reliable way to inform and entertain large numbers of people simultaneously. It is the only media platform which continues to work even when all other communication means break down during serious natural disasters like typhoons, earthquakes, hurricanes, snow and ice storms etc.
As a foremost DRM pioneer, Thomson is at the heart of all the newest DRM development and continuously invests manpower and resources in this technology to support broadcasters in meeting the challenges and demands of today and tomorrow.
The purpose of this presentation is to give an overview about some of the most exciting new DRM developments like DRM news service, DRM consumer receivers, DRM+ as well as a quick overview of the latest innovations from the house of Thomson.
Mr. Josef TroxlerManaging Director
Thomson Broadcast & Multimedia
What's New in AM Radio
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What's New in AM Radio
highly attractive option. DRM has the ease of Introductionuse that comes from digital transmissions and
2008 was a special year in a variety of ways. We has the potential to bring to every radio set a vast
had worldwide a record high with respect to selection of content. Whether for local, regional
natural disasters like earthquakes, typhoons, or international coverage, DRM has proven
hurricanes, snow storms etc. The price of oil itself to be the easiest, cheapest and most
reached an all-time high. It was the year of the independent and reliable means of distribution
Olympic Games in Beijing and it was the year of and reception of information, music and
widespread introduction of mobile TV. As a entertainment.
matter of fact, the choice of affordable The DRM platform has the potential for serving electronic gadgets and devices, the choice of several 100 millions of listeners anywhere in the program content and the choice of media world with flexibly definable targeted coverage platform has never been as big as it is today.areas.
The real challenge for broadcasters today is to For broadcasters, no additional major meet the growing demands on increased investment in existing digital or even analog program diversification and quality and at the transmission infrastructure is necessary for the same provide for service continuity even in the implementation of attractive new services on face of large scale disasters. the DRM platform.
In this respect, AM broadcasting has lost none Broadcasters can use their networks as the of its appeal. On the contrary, digital AM offers platform for transformation as they deliver an numerous substantial advantages for listeners enhanced, expanded consumer experience.and broadcasters alike. With all the new
possibilities offered by the DRM platform, DRM has near-FM sound quality plus the ease-
digital AM has never been more attractive than of-use that comes from digital transmissions.
today. The improvement over AM is immediately
noticeable. DRM can be used for a range of DRM is the difference you can hear! DRM is audio content, and has the capacity to integrate the most cost-efficient, reliable and independent text and data. This additional content can be means to reach millions of listeners at home, on displayed on DRM receivers to enhance the the road, at work or travelling in distant listening experience.countries. Using multiple program structure
which allows the simultaneous transmission of DRM is the only economically applicable
up to four programs, DRM offers various modes digital system to cover large areas over long
to suit specific propagation conditions and distances. A whole continent can be covered
service requirements. with only a few transmitters and frequencies
with near FM audio and reception quality.
DRM can also be used like FM for local Fascinating World of DRM
coverage with very low power shortwave
In a world where mobile is the key, DRM is a transmission in the 11 m-band (26 MHz). This
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found great interest worldwide as it can be used
instead of FM when all frequencies are already
occupied. Using adequate antennas with
reduced sky-wave propagation, local stations
can operate with high quality audio and data in
this band.
DRM+ is the name of the Consortium's project
to extend the DRM standard to higher
frequencies, allowing DRM to operate in the
broadcasting bands between 30 and up to 108
MHz; primarily Band I and Band II.
The interest in DRM is growing in leaps and
bounds. The ABU (Asian Broadcast-ing Union)
has been very active in con-ducting highly
professional tests and symposiums in various
countries.
In many developing countries, radio may still be
the only affordable medium of mass
communication with access to target
populations. It plays an important role in such
regions in binding individuals into a society by
the use of shared language, common interests
and objectives. Teeming with young Options like Multi-Frequency Network (MFN), populations and potential listeners, major Single Frequency Network (SFN) and Single transitions in life-style and media consumption Channel Simulcast (SCS) make very efficient are taking place in these areas.use of the existing spectrum.
Countries like India, Bhutan, Bangladesh, DRM uses the same frequency, spectrum and Russia, China, New Zealand and Mongolia are channeling as analog AM. aware of the importance of the radio
As the DRM system is developed for day- and communication platform and have openly
night-time coverage (ground and sky-wave), it is committed themselves to the DRM standard in
proved to work even under severe conditions like connection with the digitization of their
high man made noise in cities as well as difficult national networks.
propagation conditions.
Example of a possible SFN with use of DRM for National Coverage in England
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Additional advantages include more efficient The new text-based Digital Radio information
use of the spectrum, more cost-efficient service Journaline® on the DRM platform
operation of transmission equipment, and reached spectacular results, demonstrating the
interesting options such as simulcast and single efficiency of short wave broadcast with the
frequency, multi-frequency and synchronized potential to cover all the Olympic Cities
multi-frequency network coverage options. simultaneously from a single transmission point.
Depending on frequency, transmitter power, The choice of coverage area depends only on
type of antenna, target area and time of day, a the configuration of the transmitter and
single transmitter using DRM can provide antenna themselves and is completely
hundreds of millions of listeners with independent of third party infra-structure and
simultaneous access to data. In comparison, interference like satellite, Internet, etc.
simultaneous access of the Internet by only 10% The service was integrated into special Audi of these listener numbers would block lines and VIP shuttle vehicles in Beijing for in-car cause server break downs. reception, including text-to-speech function.
Whether for local, regional or international Out-of-car reception was provided by the DRM
coverage, DRM has proven itself to be an ideal receiver from NewStar Electronics, the first
means of distributing and receiving consumer, chip-set based portable DRM radio
information, music and entertainment. receiver to integrate the multiple data services
including slides shows and Journaline®.
Thomson, partnering with Audi and World First for DRM at
Fraunhofer Institute, was instrumental in the Olympics 2008 implementation of the project, providing the
DRM program via the end-to-end Thomson The Olympic Games 2008 at Beijing was an DRM transmission chain.ideal showcase for the world-first demonstration
of the new Journaline® News Service on a Such a solution can be developed to cover a
multi-platform implementation including DAB country's specific needs and is also usable for
and DRM, demonstrating to the world the great financial, traffic, weather and program
technological solutions available today using information etc. This multi platform
digital radio systems.
The idea was to have all the latest sports results
as well as sports related news and background
articles immediately available in the
DAB/DMB/DRM receivers at all times. Users
can look up information or follow the self-
updating scores of interesting matches. The
international aspect of the Olympics event
could be easily demonstrated by providing the
same information in a variety of languages
simultaneously.
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information service is only one example of the
substantial advantages made possible by digital
radio systems.
DRM Receiver News
To listen to DRM, you need a digital receiver.
The long term success of DRM depends on the
widespread availability of affordable, off-the-
shelf multi-functional consumer receivers. 2008
was a remarkable year with respect to important
breakthroughs for the receiver industry. In the
course of the year, highly attractive new digital
receiver sets from China, Russia and Germany
have been showcased at exhibitions around the
globe.
The newcomer UniWave industrializes the
first multi-media receiver based on the NewStar
chipset model. Packing all the digital
functionalities that listeners are looking for into
a neat, portable model, the attractive new DRM
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Radio Receiver was successfully demonstrated equipped with a whole range of attractive
in a symposium in Mexico earlier this year and features, like 768 station memories, multi-
showed excellent results during the Olympics language graphic User Interface, 3.5" TFT
with Journaline®. display and many more.
The Russ ian company Sarapulsky
Radiozavod has come up with the first DRM
car receiver for the market.
With dimensions of 125mm (H) x 65mm (W) x
232mm (L) the UniWave set is a very handy,
portable set, light and easy to carry. DRM
functions include station name, program
information, Journaline®, MOT slideshow and
listening time-shift of 10 minutes.
Reception is possible with DRM, FM-RDS
stereo on phones, SW/MW/LW. The set comes
The SRZ RP-229 DRM/FM car receiver
is based on the Blackfin module and delivers
near FM quality of digital transmissions in
stereo. The device enables receipt of DRM,
FM/RDS and LW/MW and SW. Reception of
DAB, DAB+ and T-DMB Audio are foreseen as
options. In addition, the set features a
MMC/SD card slot for playing and recording
mp3 music. The sets are expected to be on the
market in Q2 of 2009.
The portable set is a multi-platform receiver,
capable of DRM as well as DAB reception.
The German company TechniSat has
showcased a new model, “MultyRadio”, which
can receive most of all terrestrial radio
transmissions in all countries: DRM, DAB Band
III and L-Band, FM/UKW band as well as LW,
MW and SW. the set is equipped with a
MMC/SD card for recording DAB/DRM and
playback of mp3 and WMA and is equipped
with a 128x64 pixel display.
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thOn September 29 , 2008, an international
meeting held in Kaiserslautern, Germany,
unveiled the first highly positive results from the
trial broadcast of the DRM+ digital radio
standard. Wherever FM could somehow be
heard outside the nominal coverage area,
DRM+ could be heard well – and even further –
with no problems whatsoever.
DRM+ provides clear added value for the
listener by offering not only an uninterrupted DRM+ for Local Coverage service for both portable and mobile reception,
but also excellent audio quality. It integrates DRM+ is the name of the DRM Consortium's
additional content like text and data which can project to extend the DRM standard to higher
be displayed on DRM receives to enhance the frequencies up to 120 MHz.
listening experience!Tests have shown that FM DRM+ shares the successful design philosophy and DRM+ can co-exist within the same of DRM, it is DRM but at higher frequencies. broadcast band without problems, whereby the DRM+ is implemented in the standard as reach of DRM+ well exceeds that of FM.robustness mode E. Its spectrum usage
parameters are determined from the
internationally agreed norms in the FM band Thomson Optimizes Broadcast
(88 to 108 MHz). DRM+ provides bit rates from Systems35 kbps to 185 kbps at SNRs from 2 dB to 14 dB
and, like DRM, permits up to four services. A high overall efficiency of the complete
transmission chain can save broadcasters It is therefore a flexible solution allowing single literally millions of dollars over the component or small numbers of audio services to be life cycle of 20 or more years.broadcast together, or even for video streams to
handheld devices. It is more cost-efficient in A transmitter with a 5% lower purchase price operation than FM and allows for a more today might end up costing you many times efficient use of spectrum and gives local and more over the years for energy and maintenance regional broadcasters a low-cost opportunity to if the system efficiency is not optimized. digitize their programs during a transition
Looking at the efficiency of the overall system, phase.
we see that it can range anywhere from 30% to Throughout March, April and May 2008, the 75%, depending on how much of the energy University of Applied Sciences Kaiserslautern taken from the mains will finally be transmitted Germany has broadcast its experimental radio to the specified target area.station across the southwest German city in
Responding to the growing need of digital on 87.6 MHz using DRM+ in order to
broadcasters to reduce energy consumption and test this extended version of the DRM digital
operating costs, Thomson makes important radio standard.
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advances in newest energy-savings technology. equipment withstands the wear and tear of day-
Our teams are specialized in optimizing overall to-day, around-the-clock operation and pays off
broadcast system efficiency. in terms of low, long-term maintenance costs.
Thomson transmitters can operate in various Transmission systems from Thomson are
energy saving modes like DCC and AMC that designed with life-cycle costs and reliability in
reduce the transmitter energy consumption up mind. They provide operational savings and
to 50% as compared with the classical DSB allow for rapid adaptation to new requirements.
(Double Side Band) mode.
In digital mode (DRM), the savings potential is Summary
quite amazing. A Thomson DRM transmitter
Today, with the exciting new possibilities consumes only around a third of the power of
provided by DRM, there is no limit to what an analogue transmitter to cover the same area
radio broadcasting can do. in even better quality.
After more than a hundred years, it is still the The vast field experience gained over 70 years
only media to reach out around the globe and of broadcast engineering has convinced us that
inform and entertain people anywhere using a building equipment based on tolerance design is
single, independent infrastructure from the own always a wise decision.
home territory.Thanks to tolerance design, Thomson
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ABOUT THE SPEAKER
Mr. Troxler has been active in the broadcasting business since 1987.
Beginning as a commissioning engineer of high power AM broadcast transmitters for Thomson Broadcast & Multimedia AG (former ABB; Thomcast, Thales) business unit in Switzerland, Troxler had since then various managing positions in the company.
Since May 2008 Troxler is the Managing Director of Thomson Broadcast & Multimedia AG and in charge of the product line Radio within Thomson Group.
Josef Troxler was born 1961 near Lucerne in Switzerland. He is married and has four children.
The teams at Thomson Broadcast & was officially inaugurated by the Chief
Multimedia are totally committed to the future Executive Officer of Prasar Bharati in January
of radio broadcasting. We work hard to provide 2009.
our customers with the best, most innovative Radio plays an important role in India as a and most cost-efficient equipment available communication medium in the nation's political anywhere today. and economic development. AIR maintains one
DRM transmission systems from Thomson are of the largest broadcast networks in the world,
in operation in more than 20 countries around its radio broadcast service covering roughly
the globe. More than 60 Thomson transmitters 99% of the Indian population and 91% of the
- with a total of more than 11'000 kW AM territory.
output power - are capable to work regularly in It is a pleasure and honour for Thomson to have DRM operation. been selected by All India Radio for the upgrade
One of these countries is India. Since October of its broadcast network to digital. We are proud
2008, All India Radio AIR is doing regular to work together with the teams at AIR to bring
DRM transmission in NVIS mode and external a bright future to the broadcast platforms in
services for UK and Europe. The DRM service India.
on the Thomson 250 kW short wave tranmitter
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Abstract
DRM receivers based on programmable Digital Signal Processing chips not only offer competitive sound quality and data services, but also enable manufacturers to create multi-featured products along with additional audio post processing routines enhancing the listening pleasure. Suitable middleware adds more functionality to the receiver.
Mr T.V.B. SubramanyamAnalog Devices
DRM Receivers using Programmable DSP chips
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DRM Receivers using Programmable DSP chips
Introduction
There is a global trend towards the adoption of
digital technology in radio and commun-
ications. Digitalization offers many substantial
advantages. Digital Radio Mondiale (DRM) is
the only universal, non-proprietary digital AM
radio system with near-FM sound quality
available to the markets worldwide. Besides
providing near-FM quality audio, the DRM
system has the capacity to integrate data and
text. This additional content can be displayed in
the DRM receivers. Unlike some of the other
digital systems that require a new frequency
allocation, DRM signal is designed to fit in
within the existing broadcast bands.
Digital radio brings broadcasters increased
interactivity and connectivity for enjoying the
benefits of a wider choice of content with a
crisper signal quality, ease of tuning and extra
functionality which has the potential of
providing extra revenue streams for commercial
operators. For attaining mass markets and to
have a wider listen base, it is important to have
affordable digital radio receivers that can meet
the stringent requirements.
DRM Specifications
The properties of DRM signal are shown in
Table 1.
As shown here, the spectrum occupancy can be
4.5 or 5 or 9 or 10 or 18 or 20KHz. This
spectrum occupancy has significance in the
receiver design as will be shown later. It may be
worthwhile to note that the 20KHz bandwidth
as one of the possible bandwidths is asymmetric
with -5KHz and +15KHz from the center
frequency Fc as shown in Figure 1.
Parameter Details Frequency Range 150KHz to 30MHz (DRM+
extends this to 108MHz) Spectrum Occupancy 4.5KHz / 5KHz
9KHz / 10KHz18KHz / 20KHz
Robustness Modes A, B, C, D Access to DRM multiplex Fast Access Channel (FAC)
Service Description Channel (SDC)Main Service Channel (MSC)
DRM multiplex reconfiguration Service reconfigurationChannel reconfiguration
Table 1: Properties of DRM signals
Parameter Details MSC Modes 64-QAM 16-QAM
SDC Modes 16-QAM 4-QAM Interleaver Depths Short Interleaver: 400mS
Long Interleaver: 2 Seconds Services Up to 4 services Data entities and IDs Data available as part of
SDC Text messages and packet mode Data available as part of
SDC Alternative Frequency Signaling Enabling switching of
frequency for best reception quality
Table 2: Other relevant DRM specifications
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These have the functionality of a DSP as well as Receiver Implementationa micro-controller in one device. For control
In the last one decade, digital signal processing functions such as display, keypad, remote
(DSP) chips have improved immensely in control, etc., the microcontroller features are
performance and speeds. Performance useful and for decoding of the digitized signal
enhancements have come by using efficient and converting it to information or signal that
architectures and speeds have improved with can be fed to a speaker or a headphone, the DSP
small geometries in IC fabrication techniques functions are essential. This family of
and lower voltage & power processes. With processors offers a wide variety of interfaces
advancement in IC manufacturing process and making it easy for creating multi-featured
with growth in production volumes, the price of products in the consumer electronics domain.
these devices has also decreased. The enhanced Digital Radio Mondiale (DRM), has some very performance of these devices, it has been challenging requirements in terms of various possible to execute routines and algorithms as routines and algorithms that need to be embedded software that was not possible on a executed for decoding in DRM receivers. small device earlier. Blackfin family of DSP processors is well suited
Thus what was possible to be executed on a for these computational requirements.
Personal Computer (PC) earlier is now possible Figure 2 shows a simple block diagram of a to be executed on a DSP. It is important to see DRM receiver consisting of three fundamental what algorithms are actually required to be blocks. The first stage is a RF tuner, which executed on the processor for a specific provides an analog signal suitable to be used by function, identify unused horsepower, identify the second stage, baseband processing stage. what the markets or users may like to see in a The baseband signal processing stage then product and then implement them in such provides an audio output that is amplified and embedded platforms.sent to a speaker or a headphone stage.
Analog Devices has a family of power digital The RF tuner implemented by Analog Devices signal processing (DSP) chips called Blackfin.
Figure 2: Basic block diagram of a digital radio
Channel
Decoder User
I/O
ADC
Source
Decode
DAC
RF
To
IF
Baseband
DSP
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in their DRM radio reference design consists of to down convert the IF signal to a 7KHz low-IF
3 essential elements: signal.
1) Active antenna and front-end stage, licensed Once the RF tuner provides the low-IF at the
from Deutsche Welle, Germany. This circuit desired frequency of operation, the baseband
enables boosting of the RF signal, filtering off section digitizes this and sends the data to the
components of FM signals when in AM or processor for further computations in the digital
DRM band and also selects the appropriate domain. These computations are performed on
filter when tuned in the desired frequency the Blackfin processor.
range. Blackfin essentially performs the 3 functions
2) RF to IF conversion stage. Here the signal shown in Figure 3 and all these functions are
conditioned RF signal goes to a tuner that executed on a single processor without the need
converts this to an IF signal at 450KHz. to have an additional micro-controller on
board:3) IF to Low-IF conversion stage. The signal is
passed through a filter to limit the bandwidth to 1) Channel Decoding: The digitized RF signal is
10KHz or 20KHz depending on the converted to I&Q signal after an automatic gain
requirements. The center frequency of the filter control (AGC) and digital filtering stage.
is selected in a way to enable symmetric Synchronization, channel estimation, fast
frequency spread for the 10KHz bandwidth fourier transform (FFT) and de-multiplexing
and asymmetric frequency spread for the operations on this data provide the FSC, SDC
20KHz frequency. Then a local oscillator is used and MSC information. From this, data for the
Figure 3: Functions within Blackfin processor
Channel
Estimation,
Error
Correction,
HVXC + SBR
Audio
Frame
Creation
Channel Decoder
Source
Decoder
I2S Data
Headphone
Speaker
Label, Text Info
Program
Language
MMI
Information
CELP + SBR
AAC + SBR
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‘data services’ and ‘audio services’ is extracted. Appropriate source decoder is selected for
Details of the micro-level functions are shown in decoding the channel decoded audio services
Figure 4. data which results in a digitized audio output.
This is then passed through a digital-to-analog 2) Source Decoding: The data extracted for converter and then an amplifier to be finally sent audio services is then analyzed if the audio is an to speakers or a headphone.encoded version of:
3) Man-machine interface; The data from the 1) HE-AACdata services component provides the text 2) CELPmessages, station information, program label, 3) HXCservice label, etc., to be used by the processor to
Figure 4: Block diagram of a baseband section (Source: Fraunhofer Institute)
Flash
AMS
SDRAM
SMS
LCD
Keypad
PPI
I/O
BF53x
DAC Amp
I2S
SPI
AM/FM/DRM
Tuner
Figure 5: DRM implementation using Blackfin
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be used intelligently on the LCD display. In control purposes or may have independent pre-
addition, the processor also performs other set control functions and the volume control
man-machine or user interface functions such as function is executed by the Blackfin processor.
IR remote control, key pad, volume control, etc. In addition to the above, the Blackfin processor
Last stage of the radio receiver is the amplifier controls the tuner for various station selection
stage which “may” be connected to Blackfin for functions and other peripheral devices such as
Test Parameter Units MRR Requirements Results
156KHz dBuV/m <46 40
219KHz dBuV/m <46 37
549KHz dBuV/m <40 32
774KHz dBuV/m <40 30
1440KHz dBuV/m <40 29
1593KHz dBuV/m <40 28
2410KHz dBuV/m <32 32
3995KHz dBuV/m <32 29
5910KHz dBuV/m <32 30
9400KHz dBuV/m <28 28
15110KHz dBuV/m <28 28
21450KHz dBuV/m <28 28
25595KHz dBuV/m <28 28
Test
Table 4: Test results of the reference receiver Table 3: Test results of the reference receiver
Test Parameter Test Results Inter-modulation 5dB better than MRR Blocking > 57dB Dynamic Range 25dB more than MRR Adjacent Channel Suppression With offset of +/- 10 KHz: 5
dB better than MRR Adjacent Channel Suppression With Offset of +/- 20 KHz: 12
dB better than MRR Reception Frequency Offset 400 Hz better than MRR Operating Voltage of Power supply Nominal Supply Voltage: 9V
Receiver works between 6.5 to 12 volts
To
BF533
Flash SDRAM
EBIU
SD Card
Connector
WiFi
Module
SPI
Class D
Amp
ADAU1592
SPDIF TX
ADAV803
SPDIFSPORTs
DAB/DAB+/DMBA
Tuner
iPOD
CD /
DVD
Drive
Hard
disk
Drive
LCD / TFT
Keypad
IR Remote
PPI
UART
NAND
Flash
UART for
control
I2C for
control
AMS
UART
AMS
Ethernet
RTC 32.768 KHz
Oscillator
USB OTG
CODEC
ADAU1361
SPORTs
SPI
AM/FM/D
RM Tuner
Figure 6 : Example of a multi featured product
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memory control, ADC and DAC control, etc. with minimal increment in cost are:
Figure 5 shows the block diagram of such an 1) SD Card interfaceimplementation.
2) USBThus, various control and signal processing
3) Ethernet based internet radiofunctions have been executed on one single
4) WiFi based internet radioprocessor providing a complete Digital Radio
based on DRM standards. 5) CD drive
A radio with such a design has been tested at 6) Hard disk driveDeutsche Welle and Table 3 and 4 provide the
7) iPod docktest results and a comparison with Minimum
Can also have optional interfaces to radios Receiver Requirements (MRR) stipulated by useful in other countries:the consortium.
• DAB radioIn addition to the DRM radio functionality, the
same processor can be used for multiple other • XM radiofunctions making it a truly multi-featured
• HD Radioproduct. Figure 6 shows a block diagram of such
Figure 7 shows picture of a developer’s kit for a multi-featured product. creating such a product. This kit has the ability
Some of the other features that can be added
Figure 7: Picture of a Desktop Audio Developer’s kit with DRM with some of the interfaces enabled
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ABOUT THE SPEAKER
T.V.B. Subrahmanyam, did his Masters from IIT Delhi in 1983 and after 13 months of research activity at IITD, he has been working for Analog Devices (ADI) since 1984. The first 10 years of his association with ADI was in Sales, after which he assumed Global Marketing and Project Management responsibilities. As a Senior Program Manager, he has managed very successfully projects in the areas of Motor Control, Energy Meters and Power Line Communication. In the last few years, he has been responsible for Digital Desktop Audio programs and has enabled some very high valued customers with product designs from his team.
to function as a digital radio, internet radio and radio then becomes a feature and not a product
also as an audio player. by itself, thereby the cost of DRM is marginal.
Some of the additional software modules such Summaryas Middleware, Audio post processing and user
Blackfin based multi-featured desktop audio appealing graphical user interface, running on with Digital Radio Mondiale (DRM) as a the same processor make it a single processor feature is available for manufacturers to adopt based digital desktop audio system with features and use it for commercial products. shown in Figure 3.
The significance of the same processor being
used for all the above functions is that the DRM