Digital Voice Systems VC-55-PR User Manual

Digital Voice System s, Inc.

The Speech Compression Specialists

Preliminary

VC-55™-PR

Voice Codec Board

User’s Manual

Version 1.0

November 2005

Preliminary

VC-55™-PR Voice Codec Board
User’s Manual
Version 1.0, November 2005

Copyright, 2005
Digital Voice Systems, Inc
234 Littleton Road
Westford, MA 01886

This document may not, in whole or in part be copied, photocopied, reproduced, translated, or reduced
to any electronic medium or machine readable form without prior consent in writing from Digital Voice
Systems, Incorporated.

Every effort has been made to ensure the accuracy of this manual. However, Digital Voice Systems,
Inc. makes no warranties with respect to the documentation and disclaims any implied warranties of
merchantability and fitness for a particular purpose. Digital Voice Systems, Inc. shall not be liable for
any errors or for incidental or consequential damages in connection with the furnishing, performance, or
use of this manual or the examples herein. The information in this document is subject to change
without notice.

Trademarks
VC-55™-PR Voice Codec Board, AMBE+2™ and AMBE+™ are trademarks of Digital Voice Systems,
Inc. AMBE® is a registered trademark of Digital Voice Systems, Inc. Other product names mentioned
may be trademarks or registered trademarks of their respective companies and are the sole property of
their respective manufacturers.
Windows 200/XP/Server, Windows 98/Me are trademarks of their respective owners.

All Rights Reserved
Data subject to change

VC-55™- PR Voice Codec Board END USER License Agreement

1.0 Preliminary Statements and Definitions

1.1 "Voice Codec Board" shall mean the hardware,
software and associated documentation referred to in the
invoice or shipping papers accompanying this agreement for
which END USER has requested a license, and any derivative
works thereof, including modifications, enhancements and
extensions made by or for Digital Voice Systems, Inc. (DVSI)
and including circuit diagrams, timing diagrams,
programmable logic software, logic diagrams, layouts,
operating instructions and user manuals.

"AMBE™ Software" shall mean the speech coding software
and/or firmware provided as part of the Voice Codec Board.
This software is contained in the Read Only Memories
(ROMS, EPROMS, EEPROMS, etc...) which are included as
part of the Voice Codec Board. This software includes any
derivative works which have as their source the software
contained in the Read Only Memories, and it includes the
software contained in any future Read Only Memories which
DVSI may provide END USER for use in the Voice Codec.

1.3 "Designated Site" shall mean the location of the
Voice Codec Board.

1.4 "Proprietary Information" shall mean the information
which DVSI desires to protect against unrestricted disclosure
or competitive use and which is designated as such in writing
by DVSI or is disclosed orally and within thirty (30) days
thereafter is reduced to tangible form pursuant to this License.

DVSI represents that it owns certain “Proprietary Rights” in
the Technology and in the AMBE and AMBE+2™ Voice
Compression Software, including patent rights in the
Technology, and patent rights, copyrights, and trade secrets
in the AMBE and AMBE+2™ Voice Compression Software.

2.0 License Granted

2.1 Subject to the conditions herein and upon initial use
of the AMBE™ and AMBE+2™ Software within the VC-55™­PRVoice Codec Board, DVSI hereby grants to END USER a
non-exclusive, limited license to use the AMBE® and
AMBE+™ Voice Compression Software internal to the VC­55™-PR Voice Codec Board. Title to the AMBE® Voice
Compression Software remains with DVSI. No license is
granted for use of the AMBE® AMBE+™ Voice Compression
Software on other than the VC-55™-PR Voice Codec Board.
No license, right or interest in any trademark, trade name or
service mark of DVSI is granted under this Agreement.

2.2 END USER shall not copy, extract, de-compile,
reverse engineer or disassemble the AMBE® and AMBE+™
Voice Compression Software contained in the VC-55™-PR
Voice Codec Board.

2.3 Transfer of License
(a) END USER may transfer the VC-55™-PR Voice

Codec Board with the AMBE® and AMBE+™ Software and all
rights under this agreement to a third party together with a
copy of this Agreement provided that END USER provides
DVSI with a written notification of the transfer and provided
that the third party agrees in writing to accept all the terms
and conditions of this agreement. Upon any such transfer,
END USER's rights under this Agreement shall terminate
pursuant to Section 3.0.

DVSI Confidential Proprietary

(b) END USER may relocate the VC-55™-PR Voice
Codec Board, and the subsequent location shall then be
considered the Designated Site.

(c) Except as provided in this Section 2.2, this
Agreement, the AMBE® and AMBE+™ Software and any other
information provided by DVSI to END USER and any licenses
and rights granted hereunder, may not be sold, leased,
assigned, sublicensed or otherwise transferred, in whole or in
part, by END USER.

2.4 END USER shall not de-compile, reverse engineer or
disassemble the VC-55™-PR Voice Codec Board, AMBE® and
AMBE+™ Software.

3.0 Term and Termination

3.1 This Agreement is effective upon initial use of the
AMBE® and AMBE+™ Software on the VC-55™-PR Voice
Codec Board and shall remain in effect until terminated in
accordance with this agreement.

3.2 This Agreement shall terminate automatically without
notice from DVSI if END USER fails to comply with any of the
material terms and conditions herein. END USER may
terminate this Agreement at any time upon written notice to
DVSI certifying that END USER has complied with the
provisions of Section 3.3.

3.3 Upon termination of this Agreement for any reason,
END USER shall: (i) have no further rights to the VC-55™-PR
Voice Codec Board and AMBE® and AMBE+™ Software; (ii)
discontinue all use of the VC-55™-PR Voice Codec Board and
AMBE® and AMBE+™ Software; and (iii) destroy or, at DVSI's
option, return the VC-55™-PR Voice Codec Board and AMBE®
and AMBE+™ Software.

4.0 Payments

4.1 In consideration of the hardware, software, and
associated materials provided as part of the VC-55™-PR Voice
Codec Board and AMBE® and AMBE+™ Software, and in
consideration of the license and rights in the AMBE® and
AMBE+™ Software granted by DVSI, and in consideration of
DVSI's performance of its obligations hereunder, END USER
agrees to pay to DVSI the fee specified in DVSI's invoice.

5.0 Proprietary Notices

5.1 END USER shall not remove any copyright or
proprietary notice on the on the VC-55™-PR Voice Codec
Board and AMBE® and AMBE+™ Voice Compression
Software.

6.0 Proprietary Information

6.1 The parties agree that the VC-55™-PR Voice Codec
Board and AMBE® and AMBE+™ Software, Voice
Compression Software shall be considered Proprietary
Information.

6.2 Except as otherwise provided in this Agreement, END
USER shall not use, disclose, make, or have made any copies
of the Proprietary Information, in whole or in part, without the
prior written consent of DVSI.

6.3 END USER shall make reasonable efforts to notify
and inform its employees having access to the Proprietary
Information of END USER's limitations, duties and obligations
regarding nondisclosure and copying of the VC-55™-PR Voice

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(Preliminary)

Codec Board and AMBE® and AMBE+™ Software,.
Proprietary Information shall be used only by employees of
END USER and only at the Designated Site, except as
provided under this agreement.

6.4 END USER shall have no obligations for disclosure
or use of Proprietary Information which: (i) is already known to
END USER, at time of disclosure by DVSI; (ii) is or becomes
publicly known through publication, inspection of product or
otherwise through no wrongful act of END USER; (iii) is
received from a third party without restriction and without
breach of this Agreement; (iv) is independently developed by
END USER; (v) is disclosed to a third party by or on behalf of
DVSI without restriction; or (vi) is approved for release or use
by written authorization of DVSI.

6.5 Notwithstanding any termination pursuant to
Section 3.0, the obligations set forth in this Section 6.0 shall
survive termination of this Agreement.

7.0 Limited Warranty

7.1 DVSI warrants the VC-55™-PR Voice Codec Board
and AMBE® and AMBE+™ Software, to be free from defects
in materials and workmanship under normal use for a period
of ninety (90) days from the date of delivery. DVSI further
warrants that the VC-55™-PR Voice Codec Board and
AMBE® and AMBE+™ Software, operate in accordance with
the written specifications delivered to END USER with the VC­55™-PR Voice Codec Board,.

7.2 Except as stated in Section 7.1, the VC-55™-PR
Voice Codec Board and AMBE® and AMBE+™ Software, are
provided "as is" without warranty of any kind. DVSI does not
warrant, guarantee or make any representations regarding the
use, or the results of the use, of the VC-55™-PR Voice Codec
Board and AMBE® and AMBE+™ Software, with respect to
its correctness, accuracy, reliability, correctness or otherwise.
The entire risk as to the results and performance of the VC­55™-PR Voice Codec Board and AMBE® and AMBE+™
Software, is assumed by the END USER. After expiration of
the warranty period, END USER, and not DVSI or its
employees, assumes the entire cost of any servicing, repair or
correction of the VC-55™-PR Voice Codec Board and
AMBE® and AMBE+™ Software,.

7.3 DVSI warrants that it has the right to enter into this
Agreement and to grant a license to use the VC-55™-PR
Voice Codec Board and AMBE® and AMBE+™ Software, to
END USER.

7.4 Except as specifically set forth in this Section 7.0,
DVSI makes no express or implied warranties including,
without limitation, the warranties of merchantability or fitness
for a particular purpose or arising from a course of dealing,
usage or trade practice, with respect to the VC-55™-PR Voice
Codec Board and AMBE® and AMBE+™ Software,. Some
states do not allow the exclusion of implied warranties, so the
above exclusion may not apply to END USER. No oral or
written information or advice given by DVSI or its employees
shall create a warranty or in any way increase the scope of
this warranty, and END USER may not rely on any such
information or advice. The limited warranties under this
section 7.0 give END USER specific legal rights, and END
USER may have other rights which vary from state to state.

8.0 Limitation of Liability

Information – Section

8.1 In no event shall DVSI be liable for any special,
incidental, indirect or consequential damages resulting from the
use or performance of the VC-55™-PR Voice Codec Board and
AMBE® and AMBE+™ Software, whether based on an action in
contract, tort (including negligence) or otherwise (including,
without limitation, damages for loss of business profits,
business interruption, and loss of business information), even if
DVSI or any DVSI representative has been advised of the
possibility of such damages.

8.2 Because some states do not allow the exclusion or
limitation of liability for consequential or incidental damages, the
above limitations may not apply to END USER.

8.3 DVSI's maximum liability for damages arising under
this Agreement shall be limited to 20% (twenty percent) of the
fees paid by END USER for the particular VC-55™-PR Voice
Codec Board which caused the damages or that is the subject
matter of, or is directly related to, the cause of action.

9.0 Taxes

9.1 All payments required under Section 4.0 or otherwise
under this Agreement are exclusive of taxes and END USER
agrees to bear and be responsible for the payment of all such
taxes (except for taxes based upon DVSI's income) including,
but not limited to, all sales, use, rental receipt, personal property
or other taxes which may be levied or assessed in connection
with this Agreement.

10.0 Export

10.1 United States export laws and regulations prohibit the
exportation of certain products or technical data received from
DVSI under this Agreement to certain countries except under a
special validated license. As of May 20, 1996 the restricted
countries are: Libya, Cuba, North Korea, Iraq, Serbia,
Montenegro, and Iran. The END USER hereby gives its
assurance to DVSI that it will not knowingly, unless prior
authorization is obtained from the appropriate U.S. export
authority, export or re-export, directly or indirectly to any of the
restricted countries any products or technical data received
from DVSI under this Agreement in violation of said United
States Export Laws and Regulations. DVSI neither represents
that a license is not required nor that, if required, it will be
issued by the U.S. Department of Commerce. Licensee shall
assume complete and sole responsibility for obtaining any
licenses required for export purposes.

11.0 Governing Law

11.1 This Agreement is made under and shall be governed
by and construed in accordance with the laws of the
Commonwealth of Massachusetts, except that body of law
governing conflicts of law. If any provision of this Agreement
shall be held unenforceable by a court of competent jurisdiction,
that provision shall be enforced to the maximum extent
permissible, and the remaining provisions of this Agreement
shall remain in full force and effect.

12.0 Notices
Any notices to DVSI which may be given hereunder shall be

sent in writing to: Digital Voice Systems Inc., 234 Littleton
Road, Westford, MA, 01886 USA

DVSI Confidential Proprietary

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(Preliminary)

Information – Section

Special Handling Instructions

To avoid damage from the accumulation of a static charge, industry standard electrostatic discharge
precautions and procedures must be employed during handling and installation the VC-55™-PR
Vocoder Board.

1. Read Instructions and Users Manual – All of the safe handling and operating instructions should
be read before integration of the VC-55™- PR Vocoder Board begins. Failure to exercise
reasonable care and to follow all instructions and heed all warnings may result in injury to
property or to individuals.

2. Retain Instructions - The handling and operating instructions should be retained for future
reference.

3. Follow Instructions - All operating and use instructions should be followed.

Storage

To insure maximum shelf life in long term storage, VC-55-PR Vocoder board should be kept in an a
static shield, moisture controlled package at <40°C and <90% Relative Humidity

Installation

Ventilation - The VC-55™- PR Vocoder Board unit should be situated so that its location or position
does not interfere with proper ventilation and air circulation around the board.

Heat - The VC-55™- PR Vocoder Board unit should be situated away from devices that could act as a
heat source such as an amplifier.

Power Sources - The VC-55™- PR Vocoder Board should be connected to a power source only of the
type described in this Users Manual.

DVSI Confidential Proprietary

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Section – Table of Contents

Table of Contents

Preliminary

Section 1 INTRODUCTION .....................................................................1

GENERAL INFORMATION.........................................................................................1

Section 2 INSTALLATION ......................................................................1

OPERATION OVERVIEW..........................................................................................3

VC-55™- PR VOCODER BOARD CONNECTIONS .....................................................3

Connecting DC Power ................................................................................5

Analog Audio I/O.........................................................................................6

Handset.......................................................................................................6

USB Port.....................................................................................................6

Connecting two Boards together via UART................................................6

Connecting the UART Serial Connection to another device ......................7

OEM Connections...................................... Error! Bookmark not defined.

Section 3 SETUP & CONTROL...............................................................8

OVERVIEW ............................................................................................................8

Installing USB driver INF files On Windows 2000/XP/Server 2003............8

Installing USB driver INF files on Windows 98/Me:....................................9

Running the VC-55™ Vocoder Board Program vc55param.exe..............10

Running the Program................................................................................12

VC-55™ -PR Vocoder Board Status.........................................................13

Section 4 CHANNEL INTERFACE..........................................................15

VOCODER BOARD CHANNEL BASIC OPERATION ....................................................15

DATA STRUCTURE...............................................................................................15

Section 5 SPECIFICATIONS .................................................................17

INTRODUCTION ....................................................................................................17

BOARD CONNECTIONS.........................................................................................17

Channel Connection .................................................................................17

Audio I/O Connections..............................................................................17

USB Connection .......................................................................................18

ELECTRICAL INPUT ..............................................................................................18

MECHANICAL.......................................................................................................19

Section 6 SUPPORT ...........................................................................20

DVSI TECHNICAL SUPPORT.................................................................................20

List of Tables

T

ABLE 1 TOP PANEL CONNECTORS ........................................................................................5

TABLE 2 UART SERIAL PORT SETTINGS.................................................................................7

TABLE 3 OEM CONNECTORS ...............................................ERROR! BOOKMARK NOT DEFINED.

TABLE 4 VC55PARAM VARIABLES ..........................................................................................12

TABLE 5 VC55PARAM OUTPUT TO SCREEN.............................................................................13

TABLE 6 PACKET STRUCTURE..............................................................................................15

TABLE 7 VOCODER RATE ELEMENTS ....................................................................................16

TABLE 8 RATES DESCRIPTION ..............................................................................................16

TABLE 9 RS-232 SERIAL PORT PIN OUT...............................................................................17

DVSI Confidential Proprietary

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(Preliminary)

TABLE 10 RS-232 SERIAL PORT PIN OUT ............................................................................18

List of Figures

F

IGURE 1 BLOCK DIAGRAM ....................................................................................................4

FIGURE 2 VC-55™- PR VOCODER BOARD TOP......................................................................5

FIGURE 3 POWER INPUT CONNECTION....................................................................................5

FIGURE 4 CONNECTING TWO VC-55™-PR VOCODER BOARD’S TOGETHER..............................6

FIGURE 5 OEM CONNECTORS .............................................ERROR! BOOKMARK NOT DEFINED.

FIGURE 6............................................................................................................................14

Section – Table of Contents

DVSI Confidential Proprietary

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(Preliminary)

Section 1 – Introduction

Introduction

General Information

The Digital Voice Systems, Inc. (DVSI) VC-55™- PR Vocoder Board is a single channel full-duplex real­time voice processing board. The VC-55™-PR Vocoder Board implements DVSI’s proprietary Advanced
Multi-Band Excitation™ voice coding algorithm software.

The VC-55™- PR Vocoder Board is a full-duplex real-time voice compression solution that is ideally
suited for OEM systems in a variety of applications including digital mobile radio communication
systems, wireless telephony and voice monitoring / recording systems compressed-voice storage ideal
for or non-real-time testing and evaluation of DVSI vocoder performance applications. With its single
channel capability and compact design the PC board is engineered for easy integration into a new or
existing digital communication systems.

VC-55™- PR Features

! DVSI AMBE™ +2 Voice Coder provides Superior

Voice Quality

! Robust to Bit Errors & Background Noise
! Dual Data Rates - 7.2 kbps and 3.6 kbps
! Real-Time Full-Duplex Communication
! High performance audio using 16-bit linear stereo

codec.

! Compact Design
! Low Power Consumption
! Low Cost
! USB port provides system setup and control.
! The embedded system software is field upgradeable.
! Windows 98 Win2K and WinXP Compatible

The VC-55™- PR hardware incorporates DVSI’s patented voice compression vocoder software geared
toward the next generation of APCO Project 25 (P25) digital mobile radio communication systems.
Providing the best in voice compression performance, the VC-55™- PR integrates an enhanced dual
rate (7200/3600 bps) APCO P25 implementation.

The enhanced full-rate 4400 bps vocoder with 2800 bps of integrated Forward Error Correction (FEC)
significantly improves voice performance and provides a number of other vocoder advancements while
remaining fully interoperable with the existing APCO Project 25 vocoder standard (TIA-102BABA). The
enhanced half-rate APCO P25 vocoder operates at 2450 bps with 1150 bps of FEC to maximize system
resources and improve channel efficiency by doubling the number of public safety communication
channels. This low-bit-rate vocoder is fully interoperable with the new half-rate vocoder proposed by
DVSI for APCO Project 25 Phase II.

Both vocoders are based on DVSI’s Multi-Band Excitation (MBE) technology that codes speech using a
set of MBE model parameters for each frame of speech. These enhanced vocoders advance this
speech coding method even further. By incorporating DVSI’s latest quantization, Forward error
Correction (FEC) and Noise suppression technology they maximize communication system resources
and improve user comprehension (even in channel conditions degraded by significant bit errors or
acoustic background noise). In recent MOS testing, DVSI’s enhanced low bit rate vocoders have been
proven to consistently score significantly above the competition by delivering the highest quality voice

Digital Voice Systems, Inc.

The Speech Compression Specialists

DVSI Confidential Proprietary

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