Digital Voice Systems, Inc. - dvsinc.com

1 Digital Voice Systems, Vocoder ChipsHigh Quality Performance DVSI s latest generation AMBE+2 Vocoder Technology Excellent Voice quality - even at low data rates and inharsh background noise environments Reliable channel communications with NoiseSuppression, Improved Error Mitigation, and SoftDecision FEC DecodingDesign Flexibility/Low Cost Integration Complete integrated vocoder in one chip Maximizes channel bandwidth efficiency supports data-rates from kbps to kbps Works with most low-cost A/D-D/A codecs Selectable Serial or Parallel interfaces Order as needed - no licensing fees or royalties Off-the-shelf availability for quick deliveryOptimized for Digital Mobile Radio Systems Excellent performance at low data rates and harshenvironments Robustness to acoustic background noise and channelbit errors Small compact package design (128 pin)

2 LQFP or BGA ) Compatible with DMR Program (ETSI TS102)Interoperablewith DVSI sAMBE-2000 Voice Systems, Inc. AMBE-3000 Vocoder Chip offers the affordability,channel efficiency and low power consumption requiredby virtually all mobile communication Voice system s AMBE-3000 Vocoder Chip is an extremelyflexible, Voice compression solution that sets a new standard for quality,high-performance speech compression hardware. The AMBE-3000 Vocoder Chip is a DSP based vocoder that provides exceptional voicequality at rates as low as 2000 bps. The AMBE-3000 Vocoder Chipoffers the affordability and mobility and required by virtually all full orhalf-duplex mobile communication devices.

3 Its superior performanceand flexible design configurations makes it an ideal choice forcommercial, consumer and military communication AMBE-3000 Vocoder Chip implements DVSI s patentedAMBE+2 Voice Compression Algorithm. The AMBE-3000 Vocoder Chip can operate at virtually any data rate from to This allows designers to optimize speech and/or FEC rates withintheir system requirements to provide excellent Voice quality with superiorrobustness to bit errors and acoustic background noise. The success ofthis vocoder technology has resulted in it being chosen by many mobileradio manufacturers including APCO Project 25 in North America andDMR in Europe.

4 In addition, satellitesystems prefer this unique technologybecause of its superior Voice quality atlow bit incorporating this advanced vocodertechnology, into proven DSP technologythe AMBE-3000 vocoder chipachieves a level of performance andreliability typically associated only withcustomized ASICs but without theassociated risks and high development costs. With small quantity, off-the-shelf availability and no licensing fees or royalties, engineers andoriginal equipment manufacturers are able to efficiently design andaffordably produce high performance, narrowband, allow for easy integration, basic communication to/from the AMBE-3000 Vocoder chip is designed to be as flexible as possible.

5 TheAMBE-3000 offers users four separate physical interfaces: SPI(speech data samples interface only), McBSP serial port, UART, and aparallel port. Selecting the interface that best fits system requirementsis made easy with only two operating Littleton RoadWestford, MA 01886 Tel: (978) 392-0002 Fax: (978) 392-8866email: in128 pin LQFPand BGAP ackages!IMBE and AMBE+2 are trademarks and AMBE is a registered trademark of Digital Voice Systems, Inc., Copyright Digital Voice Systems, Inc. 2008 All Rights Reserved. (0308)(Specifications subject to change without notice.)

6 The AMBE-3000 Vocoder Chipemploys DVSI s latest AMBE+2 Voice coder AMBE-3000 Vocoder Chip is easilyconfigured to transmit and receive digitizedspeech to and from most linear, a-law, or u-lawA/D-D/A encoder and decoderfunctions are fully asynchronousfor maximum Codec mode the AMBE-3000 Vocoder Chip is configured to transmit andreceive digitized speech to and from most linear, a-law, or u-law A/D-D/A codecsthrough either its SPI or McBSP serial port and the compressed channel datauses one of the remaining interfaces. Alternatively, the AMBE-3000 Vocoderchip can be set-up to operate in packet mode, where both the speech andcompressed channel data are on the same interface.

7 Packet mode also allowsfor vocoder configuration, vocoder status information, as well as, thetransferring of speech and compressed data bits to/from the chip s internalencoder and AMBE-3000 chip boasts numerous advanced design features such asautomatic Voice /Silence Detection (VAD), noise suppression, adaptive comfortnoise insertion (CNI), DTMF and Call Progress Tone detection/regeneration,echo cancellation, low power modes and frame-by-frame on-the-fly rateswitching. Additionally, the chip includes variable rate Forward Error Correction(FEC).

8 The built-in FEC combines block and convolution codes with up to fourbits of Viterbi soft decision decoding. The quality of this FEC providesexceptional robustness to background noise and intelligible speech in degradedchannel conditions, even with bit errors (BER) of up to 20%. This level ofperformance can lead to the successful development and deployment of wirelesscommunication systems in the most demanding features, combined with the chip s small form factor (128 pin LQFP ofBGA package), make theAMBE-3000 Vocoder Chipan ideal solution forwireless applications wherebandwidth is at a premiumand low-data-rate, high- Voice -quality is the latest addition toDVSI s family of voicecompression products, theAMBE-3000 hasinteroperable modes thatprovide a seamlessmigration path from systemsalready using DVSI s AMBE-2000 and AMBE-1000 Vocoder value of DVSI s AMBE Voice Compression Technology goes beyond lowbit rate and Voice quality.

9 It has been thoroughly evaluated and tested byinternational manufacturers under various conditions using a variety oflanguages. This assures the user is getting the best vocoder available andmakes the DVSI vocoder the logical choice without the need for additionalcomparison tests. Plus the fact, that DVSI s Voice Compression technologyhas been implemented worldwide for more than 19 years, delivers the addedsecurity of a field proven technology that can play a key role in making anycommunication system an overall DVSID igital Voice Systems, Inc.

10 Specializes in the developmentof low-bit-rate, high quality Voice compression productsincorporating the patented IMBE , AMBE AMBE+ and AMBE+2 Voice Compression software and hardware Voice compressionsolutions are successfully implemented in both privateand standards-based Digital communication systemsworldwide. DVSI s Speech Compression technology isthe core component that enables original equipmentmanufacturers to produce innovative designs with anarray of advanced features. Additional companyinformation and product details can be found online VoltsPhysicalPackage:128 pin LQFP (industrial grade)Temperature Range:-40 C to 85 C (Operation)-55 C to 150 C (Storage)Speech InterfacesSPI, McBSP8 bit ulaw or alaw @ 8 bit linear* @ 8 kHz.