Cepstral-peak-picking is a human-made pitch estimation technique that computes the real cepstrum of a short-time windowed frame, identifies the peak in the low-quefrency region corresponding to the fundamental period, and maps that peak to a fundamental frequency estimate. Its parameters are window length, window function, cepstral lifter cutoff, peak-picking threshold, and voicing decision rule. It persists through speech coding standards, pitch tracking libraries, and DSP textbooks that specify the algorithm and its parameter choices.
Accepted ontology entry
cepstral-peak-picking
Cepstral-peak-picking is a human-made pitch estimation technique that computes the real cepstrum of a short-time windowed frame, identifies the peak in the low-quefrency region corresponding to the fundamental period, and maps that peak to…
Definition
Why it is in scope
A human-made signal processing technique for estimating fundamental frequency from speech or audio by locating the peak in the cepstrum, built to persist in speech coding standards, pitch tracking libraries, and audio engineering practice.
Names and aliases
- cepstral-peak-pickingen · CANONICAL
Relations from this entry
- cmspqokmf0684jlss24yd0c6fDERIVED_FROM →
Cepstral-peak-picking is a specific pitch estimation method that emerged after cepstral analysis was established as a general framework for representing spectral envelope via the cepstrum. The general method of cepstral analysis existed first; peak-picking is a derived application.
- audio-processingSERVES →
Cepstral peak picking is a pitch detection method built and maintained for the sake of audio processing practice: it extracts fundamental frequency from the cepstrum for speech/music analysis, voice activity detection, and pitch tracking in DSP chains. Servant→master per Law 8d.
- cmspqokmf0684jlss24yd0c6fDEPENDS_ON →
Cepstral peak picking operates on the cepstrum produced by cepstral analysis to locate pitch peaks; without the analysis output there is no cepstrum to inspect.
- cmspjfefp05lxjlssg1w6gyuvDERIVED_FROM →
Cepstral-peak-picking DERIVED_FROM cepstrum — the technique of picking cepstral peaks requires the cepstrum concept as its substrate. Cepstrum (the concept of the 'pectrum' domain, older) existed first and fed into cepstral-peak-picking (which operates on cepstra to find peaks).
- fast-fourier-transformDEPENDS_ON →
Cepstral-peak-picking DEPENDS_ON fft — computing the real cepstrum requires taking the FFT of the signal, then the log, then the inverse FFT. Remove FFT and the entire cepstral computation collapses: there is no way to obtain the cepstrum without it.
- cmsp6zgox04bkjlssq1q4peafDEPENDS_ON →
Cepstral-peak-picking DEPENDS_ON windowing — cepstral analysis applies a window function to segment the signal before FFT computation. Remove windowing and the signal has no proper framing for cepstral computation, causing spectral leakage that corrupts the cepstrum.
- pitch-estimationSERVES →
Cepstral-peak-picking is a specific algorithm designed and maintained for the purpose of estimating pitch from audio signals. Its design intent is pitch estimation; it serves that master purpose, Law 8d.
- cmspg0fzk056ijlss3ydafq7bDEPENDS_ON →
Cepstral peak-picking depends on spectral analysis: the technique operates on spectral data produced by cepstral/spectral analysis to identify peaks in the cepstral coefficient space. Remove spectral analysis and the input data for peak-picking ceases to exist.
- cmspqokmf0684jlss24yd0c6fINSTANCE_OF →
Cepstral peak-picking is a specific technique within cepstral analysis: it identifies pitch by finding peaks in cepstral coefficient space. A competent DSP practitioner calls it cepstral analysis. Direction correct: specific technique → general analysis method. Law 9.
Relations to this entry
No accepted relations in this direction.
Record identity
- Created
- Aug 16, 2026, 7:46 PM UTC
- Content hash
- c1430612563010078d89e91cb5872ab73e6555456b9562f9550ed1ada031b7af