DVSI Voice Compression Technology
Adopted in Many Standards-Based Systems and Ideal for Custom Applications

DVSI's patented voice compression technology delivers the highest quality voice typically unheard of at extremely low bit rates. DVSI's vocoder solutions can meet the most stringent requirements and are ideal for wireless applications, including digital mobile radio, satellite and other mission-critical communication systems.

Whether your system requires real-time full-duplex or half-duplex communications, or decode only for listening, the low-bitrate capability of DVSI's vocoders makes them an excellent choice in systems where voice comprehension is imperative and bandwidth is at a premium.

DVSI vocoders are also less complex and therefore can be implemented very cost-effectively. DVSI's speech coders have been proven in the field in many applications and they have been chosen as the standard for several major international communication systems.

AMBE+2™ Vocoder

DVSI's most advanced vocoder technology

AMBE+2™ vocoder technology has been implemented in many standards-based mobile radio and satellite communication systems worldwide. It features enhancements that not only improve voice quality but also increases robustness to acoustic background noise.

AMBE+2™ Vocoder Software Features

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This low rate vocoder (1.6 - 1.8 kbps) delivers exceptional voice quality with high performance and flexibility, maximizing the number of users supported across a fixed bandwidth.


Wide-band Vocoder

DVSI's Wide Band Vocoder (4.0 / 12.0 / 16 kbps), is ideal for systems that have the bandwidth to utilize higher data rates to reap the benefits of a premium vocoder.


Legacy Vocoders

DVSI introduced the AMBE+™ Vocoder in the late 1990's. It included numerous advancements and design features such as, automatic Voice/Silence Detection, adaptive comfort noise insertion, DTMF support and echo cancellation.

In the early 90's DVSI patented AMBE® (Advanced Multi-Band Excitation) speech compression technology that has repeatedly proven to out-perform CELP and other competitive technologies.

DVSI introduced this Improved Multi-Band Excitation algorithm (2.4 - 9.6 kbps) into the commercial marketplace in the late 1980's to provide distinct advantages over traditional CELP-based vocoders.