Digital Voice Systems AMBE-20X0 HDK Brochure & Specs
AMBE-20x0TM HDK Features
Digital Voice Systems, Inc.
The Speech Compression Specialists
• Evaluation and test of AMBE® Vocoder Performance.
• Keypad, switches and jumpers provide simple
configuration of vocoder data rate, FEC, and VAD.
• Equipped with a RS-232 interface for communication
between two boards or to a PC.
• Detection, transmission and regeneration of DTMF /
North American call progress tones.
• Complete reference design includes: sample control
software and circuit details.
AMBE-20x0™ HDK
Hardware Development Kit
(featuring the AMBE-2000™ Vocoder Chip!)
The Digital Voice Systems, Inc. (DVSI) AMBE-20x0™ HDK is a multipurpose
vocoder development tool and reference design based on DVSI’s AMBE2000™ / AMBE-2020™ Vocoder Chips. The AMBE-20x0™ HDK is ideal for
evaluation and test of vocoder performance and capabilities. The AMBE20x0™ HDK provides a comprehensive, evaluation, test and development
platform that helps product designers and manufacturing engineers gain
experience with low-bit-rate vocoders. This valuable knowledge enables them
to efficiently design and quickly produce high performance, narrowband
communication equipment. This results in lower development costs and faster
time to market.
The AMBE-20x0™ HDK employs DVSI’s successful full-duplex AMBE-2000™
vocoder chip. This chip as well as the AMBE-2020™ (half-duplex version)
are currently used in an endless array of digital communication systems around
the globe. Both chips implement DVSI’s patented AMBE® Voice Compression
Technology to provide exceptional voice quality even at low data rates. These
vocoder chips are an affordable and power efficient voice compression solution
that support compression bit rates from 2000 to 9600 bps.
Both chips include Forward Error Correction (FEC) to optimize robustness to
background noise and channel bit errors. This level of performance has
resulted in the successful deployment of wireless communication systems in
the most demanding environments. Also, the AMBE-2000™ and the AMBE2020™ vocoder chips include a number of advanced features such as: Voice
Activity Detection (VAD), adaptive Comfort Noise Insertion (CNI) and support
for DTMF tones.
S1
(Optional)
U11
Ext 5.0 Volts
(Xilinks )
Channel
RS-232
Transceiver
HandSet I/O
AMBE-20X0™-HDK
AMBE-20X0™-HDK
HW Control Words
SW 2
HW Control Words
Digital Voice Systems, Inc.
The Speech Compression Specialists
Power In
Voltage
Reg.
U12
3.3 Volts
Digital
Reset
Switch
1
Analog Out
Analog In
RCA Jack
Loopback
Header
Reset
Supervisor
4.096 MHz.
Crystal
U14
RCA Jack
Y1
8.0 MHz.
Crystal
Push to
Talk
Switch
Analog Out
GND Header
Y2
J1J2
16.384 MHz.
Clock
PLD
XC9572
JTAG
Header
J7
JTAG
Header
JP12
Handset I/O
X1
U9
Header
Analog In
GND Header
JP2 JP3 JP14
JP4
U4
U10
J8
Voltage
Reg.
U13
3.3 Volts
Analog
S2
DSP
(AMBE-2000)
RS-232
Test Points
Header
U1
HW Cntl Wds
12-15 Header
6 to 11 Switch
0 to 5 Switch
Block Diagram
Block Diagram
RS-232
Terminal
P1
U15
JP1
JP5
SW 1
The AMBE-20x0™ HDK is able to demonstrate the capabilities and benefits
of the AMBE-2000™ / AMBE-2020™ low-bit-rate vocoder in real-time, without
investing in engineering design and hardware development. Two AMBE20x0™ HDK vocoder boards may be connected together to easily establish
a full-duplex (encoding and decoding) low bandwidth voice compression
communication system.
The AMBE-20x0™ HDK is more than a low data rate voice compression tool.
The AMBE- 20x0™ HDK is also a stand-alone voice processing board,
equipped with connections for analog audio I/O, an RS-232 serial UART port
communication channel interface, and an RS-232 console output port.
Connecting the HDK to a PC, engineers can configure the channel interface,
record an analog input to a compressed data file, and decode previously
encoded files.
The value of DVSI’s AMBE® Voice Compression Technology 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, making
the DVSI vocoder the logical choice without the need for additional comparison
tests. Additionally, DVSI’s Voice Compression technology has been
implemented worldwide for more than 15 years. This field proven technology
offers a security that can play a key role in making any communication system
an overall success.
DVSI’s dedicated staff combine years of experience in vocoder technology,
with expertise in Digital Signal Processing, computer software generation
and hardware development. For more information regarding our highperformance voice compression solutions, contact DVSI today.
Technical Specifications
Analog Connections:
Line-In 3.5 mm Phono Audio Jack
Line-Out 3.5 mm Phono Audio Jack
Handset RJ-14 Full Duplex
Communication
The AMBE-20x0™ HDK vocoder board is designed with industry standard
connections for fast and easy setup and evaluation. Analog voice may be
input to the handset or RCA jack connection to provide of encoding real-time
speech. The RS-232 connector acts as the channel for the compressed data
bit stream (between 2.4 and 9.6 kbps based on user defined setting). It has
the ability to playback (decode) stored compressed voice files from a PC.
Additionally, the board provides test points for extensive circuit probing and
monitoring of data. An on-board keypad and slide switches provide control of
configuration parameters for maximum flexibility of vocoder features. All these
capabilities are ideal for comparing voice quality at various rates, analyzing
the compressed voice data I/O stream and establishing interface requirements.
This gives engineers the insight required to efficiently prototype their own
low-bit-rate communication systems.
The AMBE-20x0™ HDK is a complete hardware and software package
solution, with off-the-shelf availability. The development kit includes the
evaluation board, schematic details, software routines for the on-board
Microcontroller and Programmable Logic Device, as well as reference circuit
designs. The AMBE-20x0™ HDK provides a cost-effective vehicle that
reduces the time and up-front engineering expenses associated with new
product development. Once a new product design is complete and
manufacturing begins the AMBE-20x0™ HDK can then be used to simulate
actual system conditions as a calibrated quality control reference standard.
IMBE and AMBE+2 are trademarks and AMBE is a registered trademark of Digital Voice Systems, Inc., © Copyright Digital Voice Systems, Inc. 2006 All Rights Reserved. 7/06
Digital Connections:
Channel Data DB-9S RS-232 Serial Port
PC Connection DB-9S RS-232 Serial Port
Power:
Input Requirements 5 V DC @ 120 ma
Physical:
Size 6.75” x 5.5”
Weight 4.5 oz.
(Specifications subject to change.)
234 Littleton Road
Westford, MA 01886
Tel: (978) 392-0002
Fax: (978) 392-8866
email: info@dvsinc.com
Web Site: www.dvsinc.com
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