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How AMBE Works
Phase, and why you can mostly discard it
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rcludwick/how-ambe-works
How AMBE Works
rcludwick/how-ambe-works
How AMBE Works
Part I: The mathematics you need
Part I: The mathematics you need
Why sinusoids
The Fourier transform and the DFT
Windows, frames, and the tradeoff
Part III: The model
Part III: The model
Multi-band excitation
Analysis: pitch, voicing, amplitudes
Turning measurements into bits
The D-STAR frame on the air
Synthesis: rebuilding the voice
Part IV: Hearing it
Part IV: Hearing it
Listen: real hardware examples
Part V: The open problem
Part V: The open problem
What is not established
Part VI: Reference
Part VI: Reference
The patent landscape
Sources and method
Phase, and why you can mostly discard it
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Last reviewed: 2026-08-10.
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