Digital Voice Systems AMBE-3000 HDK User manual

Digital Voice Systems, Inc.
AMBE-3000™ Vocoder Chips
High Quality Performance
•DVSI’s latest generation AMBE+2™ Vocoder Technology
•Excellent voice quality - even at low data rates and in
harsh background noise environments
•Reliable channel communications with Noise
Suppression, Improved Error Mitigation, and Soft
Decision FEC Decoding
Design Flexibility/Low Cost Integration
•Complete integrated vocoder in one chip
•Maximizes channel bandwidth efficiency supports data-
rates from 2.0 kbps to 9.6 kbps
•Works with most low-cost A/D-D/A codecs
•Selectable Serial or Parallel interfaces
•Order as needed - no licensing fees or royalties
•Off-the-shelf availability for quick delivery
Optimized for Digital Mobile Radio Systems
•Excellent performance at low data rates and harsh
environments
•Robustness to acoustic background noise and channel
bit errors
•Small compact package design (128 pin LQFP or BGA )
•Compatible with DMR Program (ETSI TS102)
Interoperable
with DVSI’s
AMBE-2000™
Vocoder
chips.
Digital Voice Systems, Inc. USA
www.dvsinc.com
The AMBE-3000™ Vocoder Chip offers the affordability,
channel efficiency and low power consumption required
by virtually all mobile communication devices.
Digital Voice System’s AMBE-3000™ Vocoder Chip is an extremely
flexible, voice compression solution that sets a new standard for quality,
high-performance speech compression hardware. TheAMBE-3000™
Vocoder Chip is a DSP based vocoder that provides exceptional voice
quality at rates as low as 2000 bps. TheAMBE-3000™ Vocoder Chip
offers the affordability and mobility and required by virtually all full or
half-duplex mobile communication devices. Its superior performance
and flexible design configurations makes it an ideal choice for
commercial, consumer and military communication applications.
The AMBE-3000™Vocoder Chip implements DVSI’s patented
AMBE+2™ Voice Compression Algorithm. The AMBE-3000™
Vocoder Chip can operate at virtually any data rate from 2.0 to 9.6
kbps. This allows designers to optimize speech and/or FEC rates within
theirsystemrequirementstoprovideexcellentvoicequalitywith superior
robustness to bit errors and acoustic background noise. The success of
this vocoder technology has resulted in it being chosen by many mobile
radio manufacturers includingAPCO Project 25 in NorthAmerica and
DMR in Europe. In addition, satellite
systems prefer this unique technology
because of its superior voice quality at
low bit rates.
By incorporating this advanced vocoder
technology, into proven DSPtechnology
the AMBE-3000™ vocoder chip
achieves a level of performance and
reliability typically associated only with
customized ASICs but without the
associated risks and high development costs. With small quantity, off-
the-shelf availability and no licensing fees or royalties, engineers and
original equipment manufacturers are able to efficiently design and
affordably produce high performance, narrowband, communication
equipment.
To allow for easy integration, basic communication to/from theAMBE-
3000™ Vocoder chip is designed to be as flexible as possible. The
AMBE-3000™ offers users four separate physical interfaces: SPI
(speech data samples interface only), McBSP serial port, UART, and a
parallel port. Selecting the interface that best fits system requirements
is made easy with only two operating modes.

234 Littleton Road
Westford, MA 01886
Tel: [phone]
Fax: [phone]
email: [email protected]
Available in
128 pin LQFP
and BGA
Packages!
IMBE and AMBE+2 are trademarks and AMBE is a registered trademark of Digital Voice Systems, Inc., © Copyright Digital Voice Systems, Inc. 2008 All Rights Reserved. (0308)
(Specifications subject to change without notice.)
The AMBE-3000™ Vocoder Chip
employs DVSI’s latest AMBE+2™
voice coder technology.
The AMBE-3000™ Vocoder Chip is easily
configured to transmit and receive digitized
speech to and from most linear, a-law, or u-law
A/D-D/A codecs.
The encoder and decoder
functions are fully asynchronous
for maximum flexibility.
In Codec mode theAMBE-3000™Vocoder Chip is configured to transmit and
receivedigitized speech to andfrommost linear,a-law,oru-lawA/D-D/Acodecs
through either its SPI or McBSP serial port and the compressed channel data
usesoneoftheremaininginterfaces. Alternatively, theAMBE-3000™Vocoder
chip can be set-up to operate in packet mode, where both the speech and
compressed channel data are on the same interface. Packet mode also allows
for vocoder configuration, vocoder status information, as well as, the
transferring of speech and compressed data bits to/from the chip’s internal
encoder and decoder.
The AMBE-3000™ chip boasts numerous advanced design features such as
automaticVoice/Silence Detection (VAD), noise suppression, adaptive comfort
noise insertion (CNI), DTMF and Call Progress Tone detection/regeneration,
echo cancellation, low power modes and frame-by-frame “on-the-fly” rate
switching. Additionally,the chip includes variablerateForward Error Correction
(FEC). Thebuilt-inFECcombines block and convolution codes with up to four
bits of Viterbi soft decision decoding. The quality of this FEC provides
exceptionalrobustness to background noise and intelligiblespeech in degraded
channel conditions, even with bit errors (BER) of up to 20%. This level of
performancecanlead to the successful development and deployment of wireless
communication systems in the most demanding environments.
These features, combined with the chip’s small form factor (128 pin LQFP of
BGA package), make the AMBE-3000™VocoderChip
an ideal solution for wireless applications where
bandwidth is at a premium and low-data-rate, high-
voice-qualityisimperative. As the latest addition to
DVSI’s family of voice compression products, the
AMBE-3000™ has interoperable modes that
provide a seamless migrationpath from systems
alreadyusing DVSI’sAMBE-2000™andAMBE-1000™ VocoderChips.
Thevalue of DVSI’sAMBE®VoiceCompressionTechnology goes beyond low
bit rate and voice quality. It has been thoroughly evaluated and tested by
international manufacturers under various conditions using a variety of
languages. This assures the user is getting the best vocoder available and
makes the DVSI vocoder the logical choice without the need for additional
comparison tests. Plus the fact, that DVSI’s Voice Compression technology
has been implemented worldwide for more than 19 years, delivers the added
security of a field proven technology that can play a key role in making any
communication system an overall success.
ContactDVSI
DigitalVoiceSystems, Inc. specializes inthedevelopment
of low-bit-rate, high quality voice compression products
incorporatingthepatented IMBE™,AMBE®AMBE+™
and AMBE+2™ Voice Compression Technologies.
DVSI software and hardware voice compression
solutions are successfully implemented in both private
and standards-based digital communication systems
worldwide. DVSI’s Speech Compression technology is
the core component that enables original equipment
manufacturers to produce innovative designs with an
array of advanced features. Additional company
information and product details can be found online at
www.dvsinc.com.
Specifications
Electrical
Supply: 3.3 Volts
Core: 1.8 Volts
Physical
Package: 128 pin LQFP (industrial grade)
Temperature Range:
-40°C to 85°C (Operation)
-55°C to 150°C (Storage)
Speech Interfaces
SPI, McBSP
8 bit ulaw or alaw @ 8 kHz.
16 bit linear* @ 8 kHz. or @ 32 kHz.
(*recommended for optimum performance)
Channel Interfaces
McBSP, UART, Parallel
Packet formatted data