Transcript Slide 1

The World Leader in High Performance Signal Processing Solutions
DRM Receivers
using
Programmable DSP Chips
Agenda
 About
 DRM
DRM
Receivers: ADI paving the way
 Summary
Digital Radio Mondiale (DRM) Offers….
 DRM
delivers near FM sound quality with frequencies below 30MHz
 DRM+ delivers near CD sound quality with frequencies below 120MHz
 DRM is Robust against fading and interference


Supports datacasting






Provides a wide geographic coverage and thus the most suitable free-to-air
mode of broadcasting
RDS type metadata or program associated data
Service Label: Easy Tuning by station name instead of frequency
Time & Date: Reference for tuning processes
Best Frequency Tuning (AFS): Scheduled frequency selection
Service Following: Alternative frequency selection
Announcement

Dynamic Service interruption for Flash Reports (Travel, News, Weather, ...)
DRM Signal
Parameter
Details
Frequency Range
150KHz to 30MHz (DRM+ extends this to
108MHz)
Spectrum Occupancy
4.5KHz / 5KHz
9KHz / 10KHz
18KHz / 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 reconfiguration
Channel reconfiguration
10KHz Bandwidth Signal Characteristics
Fc-5KHz
Fc+5KHz
Fc
20KHz Bandwidth Signal Characteristics
Fc-5KHz
Fc+15KHz
Fc
Fc+5KHz
Encoding Chain: Transmission Equipment
Source
Audio &
Text
Source
Encoder
Channel
Encoder
RF
Choice of Source Encoders
DRM Source Encoding
AAC
Encoder
Audio
signal
SBR Encoder
(configuration
dependent)
CELP
Encoder
HVXC
Encoder
Audio
super
framing
mux &
channel
coding
Block Diagram of DRM Generation
Audio data
stream
normal prot.
source
encoder(s) [high prot.]
energy
dispersal
channel
encoder
Data
stream
pre-coder
FAC
information
pre-coder
energy
dispersal
channel
encoder
FAC
SDC
information
pre-coder
energy
dispersal
channel
encoder
SDC
pilot generator
[high prot.]
OFDM signal
generator
modulator
DRM transmission signal
normal/[high]
protection
cell
MSC
interleaver
OFDM cell mapper
normal pr
ot.
multiplexer
Consumer Receiver: Building Blocks
RF
To
ADC
Channel
Source
Decoder
Decode
IF
DSP
Baseband
DAC
User
I/O
DRM Receiver Data Flow & Processing
Blocks
Low IF or
Baseband
12
DRM Based band & Service Decoder
13
DRM Data Services
14
The World Leader in High Performance Signal Processing Solutions
DRM Receivers
ADI Paving the way
The Blackfin Advantage
Combines Full DSP
and
MCU Capabilities
ADI’s Response to Market Opportunity
ADI’s Realization:
 AM/FM: Older technology with inherent limitations
 New digital radio standards are now available to the broadcasters
Decided
to use Blackfin & create a digital radio based
on DRM standards:
 Excellent
fit for digital signal processing and micro-controller
function
 Choice of a large number of manufacturers
 Low-cost Blackfin Silicon with integrated peripherals
 Enables creation of a multi-featured product
Multiple
generations of products and heavy reuse of
software IP available with us and our customers
The Echo System Created
 ADI’s
Strength
 Design
and manufacturing of signal processing components
 Created
an echo system to collate other strengths required
for making a good DRM receiver
 Established
 BBC
partnerships with industry leaders:
for DRM C-code
 Coding
Technologies for audio decoders (AAC, CELP & HVXC)
 Deutsch
 Jasmin
Welle for active antenna & front end
Infotech for porting software on Blackfin processor
DRM Radio: Key Specifications
Minimum Requirements (2)
 Channel
Decoder
Robustness modes: A, B, C & D
 Signal Constellations:
 4 and 16 QAM for SDC (Service Description Channel)
 16 and 64 QAM for MSC (Main Service Channel)
 Protection levels: 0,1,2 & 3
 Hierarchical modulation
 Short & long interleaver depths
 Equal and unequal error protection

 Source
Decoders
Three coding systems:
 AAC+ with Error Concealment
 CELP
 HVXC
 High Frequency reconstruction method SBR
 All audio modes: Stereo, Mono & Parametric Stereo

DRM Receiver Building Blocks:
All executed by a single Blackfin
MMI
Label, Text Info
Program
Language
Channel Decoder
Information
Interface
I2S Data
Channel
Estimation,
Error
Correction,
Demulitplexing
Audio
Frame
Creation
Source Decoder
Headphones
AAC + SBR
CELP + SBR
HVXC + SBR
Speakers
Basic Radio DRM+AM+FM
Flash
RTC
I2C
SDRAM
32 MB
AMS
SMS
SPI
SD Card
Connector
AM/FM/DRM Tuner
DRM
Tuner
Amp
SPI
DAC
I2S
BF53x
PPI
LCD /
TFT
I/O
Keypad
Blackfin Processor based Radios
Himalaya Radio
Sarapul Radio
Test Results of Himalaya 2008: Sensitivity
Test Parameter
156KHz
219KHz
549KHz
774KHz
1440KHz
1593KHz
2410KHz
3995KHz
5910KHz
9400KHz
15110KHz
21450KHz
25595KHz
Units
dBuV/m
dBuV/m
dBuV/m
dBuV/m
dBuV/m
dBuV/m
dBuV/m
dBuV/m
dBuV/m
dBuV/m
dBuV/m
dBuV/m
dBuV/m
MRR
Requirements
<46
<46
<40
<40
<40
<40
<32
<32
<32
<28
<28
<28
<28
Test Results
40
37
32
30
29
28
32
29
30
28
28
28
28
ADI’s DRM Radio Receiver
 Created
Blackfin based Developer’s kit for digital radio
manufacturers to use it in their plastics, offers

Complete hardware design: Enables manufacturers to bring down the
hardware cost by negotiating pricing on various components

Flexibility to manufacturers to modify user interface software: Manufacturers
can create product differentiation
 Multi-featured
product to make the product very cost effective
 Partnership with RFmondial for DRM+:

Target to demonstrate DRM+ by 3rd or 4th quarter 2009.
 Plans
to integrate Jounaline® News Service

Signed agreement with Fraunhofer Institute, Germany for C-code

Integration of NML Parser

Interactive information service
Test Results of Himalaya 2008: Others
Test Parameter
Inter-modulation
Blocking
Dynamic Range
Test Results
5dB better than MRR
> 57dB
25dB more than MRR
Adjacent Channel With offset of +/- 10 KHz: 5 dB better than MRR
Suppression
Adjacent Channel With Offset of +/- 20 KHz: 12 dB better than MRR
Suppression
Reception
400 Hz better than MRR
Frequency Offset
Operating Voltage
of Power supply
Nominal Supply Voltage: 9V
Receiver works between 6.5 to 12 volts
The World Leader in High Performance Signal Processing Solutions
DRM as a Feature
in a
Multi-featured product
Blackfin based Digital Desktop Audio
Internet Radio
Internet Radio Features:
•TCP/IP protocols
•Shoutcast
•vTuner
•DLNA 1.0 & 1.5
Digital
Desktop Audio
Digital Radio
Digital Radio Features:
•DRM, DRM+
•DAB, DAB+ & T-DMBA
•AM/FM
•Middleware
Audio Player
Audio Player Features:
•Plays from SDCard, USB,
HDD, CD Player
•MP3, WMA, AAC, Real,
Ogg Vorbis, FLAC, etc.
•CD Ripping
ADI’s Plan for a Full Product Range
Lowest Cost with
• AM
• FM
• DRM
• DRM+
• Monochrome LCD
Mid Range with
• AM
• FM
• DRM
• DRM+
• USB Flash Player
• USB Hard disk drive
• CD/DVD Player
• Color LCD
High-end with
• AM
• FM
• DRM
• DRM+
• USB Flash Player
• iPod Dock
• Internet Radio
• Streaming audio & Pictures
• CD/DVD Player
• USB Hard disk drive
• Color LCD
Block Diagram of the Lowest Cost Radio
SDRAM 16 MB
NOR -FLASH 1 MB
EBIU
AMS
BF53X
Tuner
Module
GPIO
SPI
GPIO
PPI
SPORT
Low cost DAC
H/P
OUTPUT
KEYPAD
LCD
Amplifier
Block Diagram of Midrange Player
Block Diagram of High-end Player
Multi-featured digital radios
 Multi-featured
 Where
 Other
radio has better acceptance
DRM is one of the features
features could be
 Internet
Radio and streaming Player
 iPod Dock
 Audio player using:
 USB
 Hard disk drive
 CD or DVD drive
 Such
platforms were created to enable manufacturers to use
the design in a variety of desktop products
 The incremental cost of the DRM is only the cost of the tuner
 Cost
of all other components such as DSP, memories, codec,
power supply, etc., get paid for in the main unit
Block Diagram of the Lowest Cost Radio
SDRAM 16 MB
NOR -FLASH 1 MB
EBIU
AMS
BF53X
Tuner
Module
GPIO
SPI
GPIO
PPI
SPORT
Low cost DAC
H/P
OUTPUT
KEYPAD
LCD
Amplifier
Block Diagram of Midrange Player
Block Diagram of High-end Player
Multi-featured digital radios
 Multi-featured
 Where
 Other
radio has better acceptance
DRM is one of the features
features could be
 Internet
Radio and streaming Player
 iPod Dock
 Audio player using:
 USB
 Hard disk drive
 CD or DVD drive
 Such
platforms were created to enable manufacturers to use
the design in a variety of desktop products
 The incremental cost of the DRM is only the cost of the tuner
 Cost
of all other components such as DSP, memories, codec,
power supply, etc., get paid for in the main unit
Design can be used in a Variety of Products
 Kitchen
Radios
 Boomboxs
 Hi Fi Systems
 Clock Radio
 Portable Players
 Mini Systems
 Micro Systems
 AV Receivers
 Car radios
Summary
 The
DRM radio design is now available
 Offering
 Is
based on a very powerful DSP processor
being offered to manufacturers as Developer’s kit
 To
be used in their enclosures
 Created
 Cost
multi-featured product
of DRM is small increment only
The World Leader in High Performance Signal Processing Solutions
Back-up Slides
Modulation Modes
Mode
MSC
modulation
(nQAM)
Signal
bandwidth
options (kHz)
Typical uses
A
16 ,64
4.5,5,9,10,18,20
Least
Robust
B
Ground-wave local, regional in LW
and MW bands. SW 26MHz band
local line-of-site.
16,64
4.5,5,9,10,18,20
Sky-wave international and national
coverage in MW and SW bands
C
Very
Robust
16,64
10, 20
Sky-wave needing higher
robustness for international
coverage in SW bands
D
16,64
10,20
Sky-wave needing highest
robustness, particularly NVIS for
national coverage in SW bands
Robust
Most
Robust
Mode Selection: Example of Modes
TABLE 3
DRM tested configurations
NAME IN
DOCUMENT
Bandwidth
OFDM MSC
(kHz)
SDC
Code
Interleaver
rate
Bite
rate
(kbps)
10K_A/64/16/0,6
10
A
64QAM 16QAM 0,6
L (Long)
26.6
10K_A/64/16/0,5
10
A
64QAM 16QAM 0,5
L
22.1
9K_A/64/16/0,5
9
A
64QAM 16QAM 0,5
L
19.7
10
B
16QAM 4QAM 0,6
L
11.7
10K_B/16/4/0,5