Digital Voice Systems AMBE-3000 Specifications

Interoperable

with DVSI’s

AMBE-2000™

Vocoder

chips.

The AMBE-3000™ Vocoder Chip offers the affordability,
channel efficiency and low power consumption required
by virtually all mobile communication devices.

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)

AMBE-3000™ Vocoder Chips

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. The AMBE-3000™
Vocoder Chip is a DSP based vocoder that provides exceptional voice
quality at rates as low as 2000 bps. The AMBE-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
their system requirements to provide excellent voice quality with 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 including APCO Project 25 in North America 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 DSP technology
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. W ith small quantity, off­the-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 the AMBE­3000™ 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, UAR T, and a
parallel port. Selecting the interface that best fits system requirements
is made easy with only two operating modes.

Digital V oice Systems, Inc. USA

www.dvsinc.com

Available in

128 pin LQFP

and BGA

Packages!

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.

In Codec mode the AMBE-3000™ Vocoder Chip is configured to transmit and
receive digitized speech to and from most linear, a-law , or u-law A/D-D/A codecs
through either its SPI or McBSP serial port and the compressed channel data
uses one of the remaining interfaces. Alternatively , the AMBE-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
automatic Voice/Silence Detection (V AD), 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 variable rate Forward Error Correction
(FEC). The built-in FEC combines block and convolution codes with up to four
bits of Viterbi soft decision decoding. The quality of this FEC provides
exceptional robustness to background noise and intelligible speech in degraded
channel conditions, even with bit errors (BER) of up to 20%. This level of
performance can lead 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™ V ocoder Chip
an ideal solution for wireless applications where
bandwidth is at a premium and low-data-rate, high­voice-quality is imperative. As the latest addition to
DVSI’s family of voice compression products, the
AMBE-3000™ has interoperable modes that
provide a seamless migration path from systems
already using DVSI’s AMBE-2000™ and AMBE-1000™ Vocoder Chips.

The value of DVSI’s AMBE

®

V oice Compression T echnology 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.

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)

The encoder and decoder
functions are fully asynchronous
for maximum flexibility.

Contact DVSI

Digital Voice Systems, Inc. specializes in the development
of low-bit-rate, high quality voice compression products
incorporating the patented 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

234 Littleton Road

Westford, MA 01886

Tel: [phone]

Fax: [phone]

email: [e-mail]

(Specifications subject to change without notice.)