|
Details, datasheet, quote on part number:PC-1000TM
| |
| Part: | PC-1000TM |
| Category: | Multimedia => Audio => Codecs => Voice Codecs |
| Description: | 2.4 - 9.6 KBPS AMBE-1000 Evaluation/demo Board Designed For Use in a PC Isa Slot |
| Company: | Digital Voice Systems, Inc. |
| Datasheet: | Download PC-1000TM datasheet File size : 59 kB |
| Request For quote: | Find where to buy PC-1000TM
|
| |
Datasheet text preview:
DIGITAL VOICE SYSTEMS, INC.
The Speech Compression Specialists
Data Subject to change January 1997 Version 2.0
PC Based AMBE-1000TM Vocoder Board PC-1000TM
PC -1000TM Features:
· · · · · · High Quality Low Data Rate Speech Coding Extremely Flexible Bit Rate Selection Encode / Decode PC based files Encode / Decode Analog I/O DOS 6.2 / Windows 95 Compatible PC Source Development Software Included
Product Information
General Information:
The Digital Voice Systems, Inc. (DVSI) PC-1000 board is a PC ISA board for the AMBE-1000TM voice codec chip. The AMBE-1000TM contains proprietary software which implements the Advanced Multi-Band Excitation (AMBE®) voice coding algorithm. DVSI's AMBE1000TM Voice Codec is an extremely flexible highperformance vocoder. The AMBE-1000TM provides superior voice quality at low data rates. It provides a real-time, full-duplex implementation of the standardsetting AMBE® speech compression system. DVSI's patented AMBE® technology has been proven to outperform CELP and other competitive technologies. Numerous evaluations have shown its ability to provide performance equal to today's digital cellular systems at under half the data rate. The AMBE® speech compression system is used in applications throughout the world, including the next generation of digital mobile communication systems. The AMBE-1000TM provides a high degree of flexibility in selecting the speech and FEC data rates in 50 bps increments, from 2.4 kbps to 9.6 kbps. The figure below shows the results of a recent voice codec evaluation. The mean opinion score (MOS) rating is a speech quality measure with the highest quality = 5 and the lowest = 1.
AMBE-1000TM Features:
· · · · · · · · · DVSI Full Duplex AMBE® Voice Coder Supports Data Rates of 2.4 kbps to 9.6 kbps User Selectable Error Correction Dual Tone / DTMF Echo Cancellation Self-Test Loop-Back Mode Voice Activation/ Comfort Noise Insertion Power-Down Mode Selectable Serial or Parallel Channel Interface
V o i c e Codec Speech Quality Results
4 M e a n Opinion Score 3.8 3.6 3.4 3.2 3 2.8 2.6 2.4 2.2 2 3 . 6 kbit/s AMBE ® 2 3 4 Codec 5 6 8 kbit/s VSELP
Copyright © 1997, Digital Voice Systems, Incorporated. All rights reserved. AMBE® is a registered trademark of Digital Voice Systems, Incorporated AMBE-1000TM is a trademark of Digital Voice Systems, Incorporated PC-1000TM is a trademark of Digital Voice Systems, Incorporated Protected by U.S. Patent Numbers 5,491,772, 5,247,579, 5,226,684, and 5,517,511 and by other patents and patents pending.
January 9, 1997
PC-1000TM Users Document Version 2.0
DVSI
Table of Contents
1. INTRODUCTION......... 1 2. HARDWARE CONFIGURATION..... 1 2.1 PC-1000 BOARD....... 1 2.2 ANALOG OUTPUT ...... 3 2.3 ANALOG INPUT ......... 3 2.4 IO-MAP...... 3 2.5 IRQ............ 4 2.6 DEFAULT IRQ AND I/O PORT SETTINGS..... 4 2.7 AMBE-1000TM PIN CONFIGURATION ........ 4 3. SOFTWARE... 6 3.1 INSTALLATION AND TEST ... 6 3.1.1 Installation ....... 6 3.1.2 Testing .............. 7 3.1.3 Troubleshooting installation problems............. 7 3.1.4 Recompiling the PC-1000 software... 7 3.2 COMMANDS .............. 8 3.2.1 encfile -- Encode a PCM file and save it in AMBE-1000 packet format .... 8 3.2.2 decfile -- Decode an AMBE-1000 packet file and save it in a PCM file. ......... 9 3.2.3 recpkt -- Record voice data from Mic or Aux and save it in AMBE-1000 packet format....... 10 3.2.4 playpkt - Decode an AMBE-1000 packet file and play it through Mic or Aux........ 11 4. ADVANCED FEATURES... 12 4.1 ADVANCED HARDWARE... 12 4.2 ADVANCED SOFTWARE .... 13 5. TECHNICAL SUPPORT .... 14 6. LICENSE AGREEMENT ... 15
Page ii
Copyright ©Digital Voice Systems, Inc., 1997 Technical Data Sheet Data subject to change
January 9, 1997
AMBE-1000TM Technical Data Document Version 2.0
1. Introduction The Digital Voice Systems, Inc. (DVSI) PC-1000TM board is an evaluation board for the AMBE-1000TM voice codec chip. The AMBE-1000TM contains proprietary software which implements the Advanced Multi-Band Excitation (AMBE®) voice coding algorithm. DVSI grants a license to its customers to use this software according to the terms established in the attached PC-1000TM END USER License Agreement. Use of the PC-1000TM, or any portion thereof, signifies acceptance of these licensing terms. The PC-1000TM can encode data from one of two sources. The first is by digitizing an analog speech signal using an on-board A-to-D converter. The second method reads an 8 KHz speech file from the PC. This digitized speech is then processed by the encoder and converted into a 2.4 to 9.6 kbps data bit stream (the data rate depends on the jumper pin settings or software setting). This bit stream is output to the PC and stored in a file. The user can choose one of two destinations to send PC-1000TM decoded data . Decoded data can be stored as a file in a PC or sent to the D-to-A converter. The PC-1000TM can play back an encoded file that was recorded in a 2.4 - 9.6 kbps data bit format. This received bit stream is processed by the decoder and converted into a synthetic speech signal which is then either sent to a PC's hard drive or converted into an analog signal using the on-board D-to-A converter. The encoder and decoder are fully asynchronous. The AMBE-1000TM includes a number of advanced features such as an automatic Voice/Silence detection (VAD), adaptive comfort noise generation, DTMF detection and signaling, low power modes, and echo cancellation. Enabling these features of the AMBE-1000TM is described in the following sections. 2. Hardware Configuration 2.1 PC-1000 Board Figure 2.1-1 shows the physical dimensions of the PC-1000 board.
Page 1 Copyright ©Digital Voice Systems, Inc., 1997 Technical Data Sheet Data subject to change
|
|
