DVSI Corporate Overview


Who we are


Digital Voice Systems, Inc. specializes in the development of low-bitrate, high-quality voice compression products incorporating the patented AMBE+2™, AMBE+™, AMBE® and IMBE™ Voice Compression Technologies.

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DVSI Corporate Management


Founded by our Management team in 1988, Digital Voice Systems, Inc. (DVSI) of Westford, Massachusetts, is a world leader in the development of low data-rate, high-quality speech compression products used in digital communications and storage applications.


Dr. Jae S. Lim

Chairman of the Board & Co-founder



Dr. John C. Hardwick

President & Co-founder



Dr. Dan W. Griffin

Director of Research & Development


DVSI Press Releases


2023 Press Releases



Clearwater FL, – Digital Voice Systems, Inc. (DVSI) the recognized leader in the development of low bit rate speech compression technology announces the relocation of its corporate offices to Clearwater, Florida. After more than thirty five years of continued successful growth in the Boston Massachusetts area, DVSI is relocating its main facility including engineering, R&D and manufacturing. Being conveniently located in downtown Clearwater provides DVSI with more opportunities to add to its team of world class engineers.
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2021 Press Releases



The USB-3000™ RC, is a a parametric rate converter and a repeater that is capable of converting between or repeating rates supported by AMBE+2™ Vocoder Technology.
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2016 Press Releases



The USB-3012™, is a multi-channel USB device capable of up to twelve full-duplex simultaneous encoder/decoder operations.
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2015 Press Releases



Digital Voice Systems, Inc. (DVSI) the recognized leader in the development of low-data-rate speech compression technology today announced it is shipping its newest full-duplex vocoder chip the AMBE-4020™ Full-Duplex.
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Digital Voice Systems, Inc. (DVSI) announces the availability of AMBE+2™ Enhanced Dual Rate vocoder libraries optimized for x86 processor platforms using Intel Streaming SIMD Extensions (Intel SSE).
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2014 Press Releases



Digital Voice Systems, Inc. (DVSI) announced today the availability of a hardware development kit for DVSI's new AMBE-4020™ vocoder chip. The AMBE-4020™ HDK is a comprehensive, evaluation, test and development platform that helps product designers and manufacturing engineers gain experience with low-bit-rate vocoders.
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Digital Voice Systems, Inc. (DVSI) the recognized leader in the development of low-data-rate speech compression technology announces the availability of the AMBE-4020™ Vocoder Chip.
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2013 Press Releases



Cadence Design Systems, Inc. (NASDAQ: CDNS), a leader in global electronic design innovation, today announced that Digital Voice Systems, Inc. (DVSI) AMBE® Advanced Multi-Band Excitation wideband decoder software has been ported to the Cadence® Tensilica® HiFi Audio/Voice DSP family to enhance high-quality voice compression at low bit rates.
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Digital Voice Systems, Inc. (DVSI) the recognized leader in voice compression technology today announced it is a new member in the ARM Connected Community, the industry’s largest ecosystem of ARM technology-based products and services.
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DVSI Employment Opportunities


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