Digital Voice Systems, Inc. (DVSI)
A recent investigation has found that one or more companies based outside the United States are producing and distributing unauthorized copies of several DVSI vocoder products in clear violation of DVSI’s intellectual property rights. Specifically, pirated copies of DVSI’s AMBE-1000™, AMBE-2000™ and AMBE-3000™ vocoder chips are being manufactured and sold by Indusic - also known as Nanjing Wutong Microelectronics Technology Co., Ltd., a company based in the People’s Republic of China. Such pirated vocoder chips sold by Indusic, or others, are not licensed under any of DVSI’s intellectual property rights. In addition, they are not authorized, warranted or supported by DVSI, and they may not meet the same quality, performance and interoperability specifications as authentic DVSI products. DVSI views purchasers of unlicensed products such as those offered by Indusic to be contributing to the infringement of DVSI’s intellectual property rights, and DVSI intends to hold all parties accountable as part of DVSI’s commitment to protect its intellectual property.
In order to avoid legal ramifications and to assure that all vocoder products meet the highest levels of quality, performance and interoperability, DVSI recommends purchasing only fully authorized and licensed vocoder products exclusively from DVSI or an authorized source. Furthermore, DVSI strongly recommends against purchasing any pirated vocoder products including those from Indusic (aka Nanjing Wutong Microelectronics Technology Co., Ltd.) or its affiliates. Indusic is not licensed by DVSI and has no right to sub-license, authorize, sell, produce or distribute any DVSI vocoder technology including hardware and/or software products.
Digital Voice Systems, Inc. (DVSI), is the sole owner and developer of the AMBE®, AMBE+™ and AMBE+2™ vocoder technology and associated hardware and software products, including those presented on this website and elsewhere. DVSI holds extensive intellectual property rights including patent rights, copyrights, trademarks and trade secrets in its AMBE®, AMBE+™ and AMBE+2™ vocoder technology and products.
The unauthorized reproduction or distribution of a copyrighted work is illegal. Criminal copyright infringement, including infringement without monetary gain, is investigated by the FBI and is punishable by fines and federal imprisonment.
The lowest bitrate with the highest voice quality and intelligibility
Robustness against acoustic noise and bit errors
Support for DTMF tones and other advanced features
Interoperability with advanced digital radio and telephony standards
DVSI's voice compression technology is widely accepted as the vocoder of choice in bandwidth limited applications such as digital mobile radio and satellite telephony
The most advanced vocoder technology
3.6 kbps vocoder is the DMR digital radio protocol standard
3.6 kbps vocoder is the dPMR™ digital radio protocol standard
4.0 kbps vocoder technology used in GMR-1 satellite telephony
DVSI Legacy Vocoder
3.6 kbps vocoder is the digital technology used in MOTOTRBO™'s two-way radio system.
1.2 - 1.8 kbps vocoder delivers exceptional voice quality
4.0 / 12.0 / 16 kbps vocoder reaps the benefits of higher data rates
3.6 kbps vocoder for amateur radio
3.6 kbps vocoder technology is deployed in the Asia Cellular System
3.6 kbps vocoder used in Inmarsat™ global satellite communication system
3.6 kbps for air/ground air traffic communications systems
3.6 kbps vocoder was selected digital mobile radio NXDN™
7200 bps / 3600 bps vocoder used by public safety organizations worldwide
4.0 kbps Vocoder used to broadcast local traffic via satellite
2289 bps vocoder used in the Iridium constellation to communicate via hand-held satellite phones
4.0 kbps vocoder the standard for the Thuraya geostationary mobile satellite system
2450 bps and 4.0 kbps vocoder for mobile communications across Mexico
DVSI's vocoder technology is available in hardware that enables original equipment manufacturers to produce low volume innovative designs with an array of advanced features without licensing fees and royalties
(Featuring the AMBE-3000™ Vocoder Chip)
The Digital Voice Systems, Inc. (DVSI) USB-3000™ is the perfect combination
of the AMBE-3000™ Vocoder Chip with a USB interface. Connect the USB-3000™ to a Windows based PC's
USB interface and get direct access to DVSI's AMBE-3000™ Vocoder Chip.
Digital Voice Systems Inc.'s Vocoder Chips provide implementations
of the standard-setting AMBE®, AMBE+™ or AMBE+2™ voice compression
technologies. DVSI's patented AMBE® voice compression software has been proven
to outperform CELP, RELP, VSELP, MELP, ECELP, MP-MLQ, LPC-10, and other competitive
The Net-2000™ VCU is availble in four models, each equipped "
with one of DVSIs patented vocoder technologies. By incorporating DVSI vocoder software
with Ethernet network connectivity the Net-2000™ VCU is ideal for OEM digital-communication
applications, including Voice Over Internet Protocol (VoIP), wireless telephony
and voice-monitoring / recording products.
Digital Voice System’s USB-3000™ RC features a parametric rate converter and a repeater making it capable of converting between or repeating any rate supported by AMBE+2™ Vocoder Technology. The USB-3000™ RC is an economical way to promote interoperability between AMBE®® vocoder communication networks, facilitate unlimited coverage areas and help deliver efficient data transmission. The USB-3000™ RC offers interoperability with a wide variety of mobile radio standards including APCO P25, DMR, dPMR and MotoTRBO applications as well as satellite communication networks such as TerreStar, MexSat and GlobalStar.