Advanced Multi-Band Excitation
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Advanced Multi-Band Excitation (AMBE) is a very powerful proprietary speech coding standard developed by Digital Voice Systems, Inc..
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[edit] Features
AMBE operates at very low bitrates of between 2000 and 9600 bit/s. The audio data is usually combined with up to 7.200 bps of forward error correction data. Lost frames can be masked by using the parameters of the previous frame to fill in the gap.
AMBE has a low complexity, lower than CELP format.
[edit] Technology
AMBE is based on Codebooks and works at a sampling rate of 8 kHz in frames of 20 ms.
[edit] History
1980 Multi-Band Excitation (MBE) was developed at the MIT. DVSI improved MBE-technology which led to their Improved Multi-Band Excitation (IMBE). AMBE is the further improved successor of it.
[edit] Usage
It is used by the Inmarsat and Iridium satellite telephony systems, certain channels on XM Satellite Radio, Charles Brains (Call sign: G4GUO) protocol for high frequency amateur radio and is the speech coder for OpenSky Trunked radio systems.
[edit] External links
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