User`s manual

USB-3000™
User’s Manual Version 1.6a
Section 1 –
Introduction
Page 1
Digital Voice Systems, Inc.
The Speech Compression Specialists
1. Introduction
1.1. Overview
The USB-3000™ contains Digital Voice Systems’ proprietary and patented Advanced Multi-Band Excitation
AMBE® voice compression technology. The USB-3000™ provides the flexibility to operate at virtually any data
rate from 2000 bps to 9600 bps. This variety of speech and/or FEC rates permits vocoder optimization within
system requirements that leads to excellent voice quality with superior robustness to bit errors and acoustic
background noise. This data rate flexibility makes the USB-3000™ a cost efficient design and development tool
for high performance, low bandwidth voice communication applications. In addition, the USB-3000™ includes a
number of advanced features such as Voice Activity Detection (VAD), adaptive Comfort Noise Insertion (CNI)
and support for DTMF tones.
The AMBE® voice compression technology has been thoroughly evaluated and tested under various conditions.
It has been implemented and field proven by a variety of manufacturers around the world. The true value of the
AMBE® vocoder is in providing a 2-3x improvement in channel capacity while maintaining a high performance
level. The AMBE® vocoder technology has been proven in critical applications such as digital mobile radio,
satellite communication systems and in other wireless communication devices. 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 and dPMR in Europe.
1.2. USB-3000™ Features
 Instant access to DVSI’s AMBE® Vocoder Technology via USB connection.
 Encode and decode files to/from a PC through the USB interface.
 Can be designed into a real-time full-duplex communication system.
 Virtual Com port design allows for flexible implementation into a variety of configurations.
 The USB-3000™ offers high quality speech compression and FEC data rates that can be set from
2000 bps to 9600 bps.
 Control of the AMBE-3000™ Vocoder Chip capabilities such as Soft decision FEC, Voice Activity
Detection (VAD), adaptive Comfort Noise Insertion (CNI) and DTMF tones.
 The USB device comes with sample control software and reference documentation.
 Compatible with Window XP, and Vista.
 Create a multi-channel system with additional USB-3000™ devices.
Figure 1 USB-3000™ and the USB-3000™ P25
DVSI Confidential Proprietary