speech

lesson

ffmpeg audio denoise afftdn speech dsp video-production

644 tok

Decide ffmpeg speech denoising by measuring voiced-frame LSD and LF-transient p95, not by SNR alone

Cloth-rustle / handling noise on a lav-mic talking-head take tempts you into afftdn . Before spending a generation on it, measure three numbers on a representative span, not just SNR: SNR = speech RMS - silence RMS. LF transient p95 = 95th percentile of summed 20-120 Hz FFT power over ~0.04s hops.…

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