AMBE-4020 Half-Duplex Vocoder Chip 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. This new addition to DVSI’s family of high performance vocoder chips is ideal for half-duplex communication systems. The AMBE-4020™ Vocoder Chip combines a small footprint design with minimal power requirements, at a low cost, to make it a logical choice for commercial, consumer, and military mobile radio communication applications. The AMBE-4020 Vocoder Chip uses the proven technol™
ogy of an ARM Cortex-M4 32-bit MCU that is based on the ARMv7 architecture and Thumb®-2 ISA to deliver a level of performance and reliability typically associated only with customized ASICs, but without the associated risks and high development costs. The AMBE-4020™ Vocoder Chip implements DVSI’s patented AMBE+2™ Voice Compression Algorithm that can operate at virtually any data rate from 2.0 to 9.6 kbps. With this high degree of flexibility,
FEATURES • Low-cost • High-quality voice • Noise suppression High Quality Performance
ĄĄ Superior voice quality, DVSI's latest generation half duplex
AMBE+2™ Vocoder Technology ĄĄ Maximizes channel bandwidth efficiency and supports data-rates from 2.0 kbps to 9.6 kbps ĄĄ The AMBE-4020™ Full-Duplex model supports echo cancellation ĄĄ User selectable forward error correction rates – 50 bps to 7.2 kbps ĄĄ Excellent performance at low data rates and harsh environments ĄĄ Robustness to acoustic background noise and channel bit errors ĄĄ Advanced features like Noise Suppression, Improved Error Mitigation, and Soft Decision FEC Decoding ĄĄ Supports a-law and u-law companding via I2S interface ĄĄ DTMF detection and regeneration with North American call progress tones
the user can optimize speech and FEC rates to provide
Design Flexibility/Low Cost Integration
excellent voice quality with superior robustness to bit errors
ĄĄ 80 pin 12mm x 12mm LQFP small package design
and acoustic background noise. The unparalleled performance of this vocoder technology has resulted in it being recognized as the standard for voice quality in Land Mobile Radio and Satellite Communications systems around the world.
ĄĄ Special order package available, such as 121 ball
8mm x 8mm BGA
ĄĄ Integrated ADC/DAC for quality audio I/O ĄĄ Also can be interfaced with most low-cost A/D-D/A codecs ĄĄ Input Interfaces include: internal ADC or digital mic or I2S ĄĄ Output interfaces include: internal DAC or I2S ĄĄ Interface for low-cost digital microphone ĄĄ Very low power consumption – Ideal for portable mobile devices ĄĄ Small compact footprint design ĄĄ No licensing fees or royalties ĄĄ Off-the-shelf availability for quick delivery mil-embedded.com/p373756
Digital Voice Systems, Inc.
www.dvsinc.com/products/a4020.htm
www.mil-embedded.com
sales@dvsinc.com
978-392-0002
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