@audio/denoise-spectral

Spectral subtraction (Boll 1979) with Berouti over-subtraction + spectral floor

npm install @audio/denoise-spectral

import specsub from '@audio/denoise-spectral'

Berouti spectral subtraction (1979). Estimates noise from the first noiseFrames (or tracks it via Minimum Statistics) and subtracts α(γ)·N̂(k) — an SNR-adaptive over-subtraction factor — from each magnitude frame, with a β·|Y(k)|² spectral floor. Pass an explicit alpha to force a fixed factor.

specsub(data, { beta: 0.02, noiseFrames: 6 })                 // adaptive α(γ)
specsub(data, { alpha: 2, beta: 0.02 })                       // fixed over-subtraction

| Param | Default | | |---|---|---| | alpha | adaptive | Fixed over-subtraction factor; omit for Berouti α(γ) | | beta | 0.02 | Spectral floor (fraction of the noisy spectrum) | | noiseFrames | first 4 frames | Leading noise-only frames for the PSD bootstrap |

Use when: quick baseline; offline cleanup with a known noise-only preamble. Not for: musical-noise-sensitive material — use wiener or omlsa.

Part of @audio/denoise — the denoise family umbrella. This README is generated from the umbrella docs.

MIT © audiojs