USB-3000™ and the USB-3000™-P25





Introduction

The Digital Voice Systems, Inc. (DVSI) USB-3000™ is the perfect combination of DVSI's AMBE™ Vocoder Technology with a USB interface. Connect the USB-3000™ to a Windows based PC's USB port, and users can encode and decode files, or develop a customized system to process real time speech.

The USB-3000™ contains Digital Voice Systems' proprietary and patented Advanced Multi-Band Excitation AMBE® voice compression algorithm. The standard version USB-3000™ includes the same vocoder as found in DVSI's AMBE-3000™ vocoder chip. The USB-3000™ is also available equipped with DVSI's Enhanced Dual-Rate vocoder that is interoperable with the APCO International Project 25 (APCO P25) standard (TIA-102BABA). The USB-3000™ enables users to explore the capabilities and benefits of both of these vocoder technologies in real-time, without investing in large amounts of engineering time and hardware prototypes.

Proven Technology

The AMBE® vocoder technology has been implemented by a variety of manufacturers around the world. 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.

The USB-3000™ provides a low cost alternative to a fully customized software implementation because it is available off the shelf and requires no up-front licensing fees or royalties. Now product designers, communication engineers and original equipment manufacturers can implement DVSI's AMBE-3000™ vocoder or the APCO Project 25 Enhanced Dual-Rate Vocoder into customized high performance, low-bit-rate communication systems, without risks and high development costs associated with DSP implementations.



The simplistic design of the USB-3000™ along with its USB interface makes it an ideal component in the production of low-volume military and commercial communication equipment that is cost effective to manufacture, affordable and inexpensive to operate. In addition, the USB-3000™ can be used to create multi-channel systems by connecting more than one USB-3000™ to a single PC.

The value of DVSI's USB-3000™ goes beyond its simplistic design. The USB-3000™ can also prove itself as a comprehensive, evaluation, test and development platform. Once a new product design is complete and manufacturing begins, the USB-3000™ can simulate actual system conditions of DVSI's AMBE-3000™ vocoder or the APCO Project 25 Enhanced Dual-Rate Vocoder and act as a calibrated quality control reference standard.

USB-3000™ Models

There are four versions of the USB-3000™ available, giving designers the abilty to select the model that best meets their application requirements.
USB-3000™ Versions Rates Supported
Model Number Description AMBE-3000™ APCO Project 25
USB-3000™ Standard Version YES NO
USB-3000™-OEM Standard OEM Version YES NO
USB-3000™ P25 APCO Project 25 Version YES YES
USB-3000™ P25-OEM APCO Project 25 OEM Version YES YES

USB-3000™ Standard Version
The standard version USB-3000™ is configured to use DVSI's USB driver (included on a CD-ROM). These drivers will work with Windows XP and Windows Vista only. Refer to the USB-3000™ users manual for more details.

USB-3000™ Standard - OEM Version
The standard - OEM version of the USB-3000™ is configured to use the generic USB drivers offered by Future Technology Devices International Ltd. (FTDI). FTDI has USB drivers for several operating systems. Please visit the FTDI website for more information.

USB-3000™ P25 Version
The USB-3000™ P25 includes DVSI's patented Enhanced Dual-Rate Vocoder technology that is fully interoperable with APCO Project 25 standard (TIA-102BABA). The USB-3000™ P25 provides the enhanced AMBE+2™ "full-rate" vocoder (7200 bps) plus the AMBE+2™ enhanced "half-rate" (3600 bps) vocoder that are used in APCO Project 25 Phase 2. The enhanced full-rate AMBE+2™ vocoder is fully compatible with the older IMBE™ vocoder that was used in the APCO Project 25 Phase 1. Both vocoder rates can be set to run with or without Forward Error Correction. In addition to the APCO Project 25 rates, the USB-3000™ P25 also supports all of the 61 built in rates that are available on the standard version USB-3000™.

The USB-3000™ P25 is identical to DVSI's USB-3000™ except that it includes two additional custom rates which are not supported by the standard USB-3000™. The USB-3000™ P25 uses DVSI's standard USB driver. These drivers will work with Windows XP and Windows Vista only. Refer to the USB-3000™ Users Manual for more details.

USB-3000™ P25 - OEM Version
Identical to the USB-3000™-P25 in operation. This version is configured to use generic drivers offered by Future Technology Devices International Ltd. (FTDI). FTDI has USB drivers for several operating systems. Please visit the FTDI website for more information.

Features

The USB-3000™ offers a variety of speech and/or FEC rates to permit vocoder optimization within system requirements to deliver excellent voice quality with superior robustness to bit errors and acoustic background noise. 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 USB interface allows users to connect the USB-3000™ to a Windows based PC, to transmit/receive speech and compressed data, as well as, configure vocoder options and monitor vocoder status information. The USB-3000™ is designed so that all speech and channel data to/from the device is formatted into packets. The USB-3000™ sends a packet in response to every packet received. The packet interface used by the USB-3000™ is identical to the one used in DVSI's AMBE-3000™ Vocoder Chip. For more detailed packet information refer to the AMBE-3000™ vocoder chip manual.

Key benefits of the USB-3000™ Vocoder are:


Mechanical Specifications 

PC Connection USB
Size 2.5 X 1.0 X 0.5 inches
Weight ~1.0 ounce

Complete Package

The USB-3000™ is a complete hardware package comes with software and documentation that allows the user to quickly install and begin to process speech data. Technical documentation includes a USB-3000™ Users manual and the AMBE-3000™ USB User's Manual.