AMBE-1000™

Digital Voice System Inc.'s AMBE-1000™ Vocoder Chip is an extremely flexible high performance vocoder. The AMBE-1000™ Vocoder Chip is a low cost,DSP based full-duplex voice coding solution for real-time and non-real time voice compression applications. The AMBE-1000™ Vocoder Chip uses DVSI's proprietary AMBE™ Voice Compression Technology to deliver excellent voice quality even at low data rates. Proven to be a superior alternative to linear predictive model vocoders AMBE™ Voice Compression Technology has been chosen as the standard for several major satellite and mobile radio communications systems.

The AMBE-1000™ Vocoder Chip includes a number of advanced features such as an automatic Voice/Silence detection (VAD), adaptive comfort noise generation, DTMF detection and signaling, echo cancellation and low power saving modes.

The AMBE-1000™ Vocoder Chip supports bit rates from 2400 to 9600 bps. The total rate is the combination of the speech data and the Forward Error Correction (FEC). The AMBE-1000™ has the flexibility to change the speech and FEC rates in 50 bps increments. High FEC rates enable the vocoder to maintain acceptable speech quality even at BER rates as high as 5%. This is a feature that is ideal for mobile communication applications that experience degraded channel conditions and / or significant bit errors.

The AMBE-1000™ Vocoder Chip is easily set-up to transmit and receive digitized speech to and from most linear, Alaw, or mu-law A/D-D/A (codec) chips through a serial interface. Even programmable A/D-D/A codecs can be configured through a single interface with a controlling processor. The digitized speech from the external A/D chip is converted into compressed digital data (encoded) by the AMBE-1000™ Vocoder Chip and output to the channel interface.