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


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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