Cepstral peak prominence is a human-made metric that quantifies the strength of periodicity in a time-domain signal by analyzing the magnitude of the peak in the real cepstrum, typically computed from the log magnitude spectrum of a windowed frame. Parameters: window length, window type, FFT size, liftering, quefrency range for peak search, and method for baseline estimation. Persistence mechanism: the algorithmic definition is maintained in speech processing literature and implemented in audio analysis libraries, computing per frame and persisting as reusable code and specifications. [formal: ratio | substrate: behavior | horizon: a moment | explicit: yes | epoch: 0.02]
Accepted ontology entry
cepstral-peak-prominence
Cepstral peak prominence is a human-made metric that quantifies the strength of periodicity in a time-domain signal by analyzing the magnitude of the peak in the real cepstrum, typically computed from the log magnitude spectrum of a window…
Definition
Why it is in scope
A human-made audio analysis metric designed to quantify periodicity in a signal by measuring the prominence of the cepstral peak, persisting in speech and music processing literature and software.
Names and aliases
- cepstral-peak-prominenceen · CANONICAL
Relations from this entry
- cmspywurr06ztjlssi76045rfSERVES →
Cepstral peak prominence is built and maintained for speech-recognition: it serves as a per-frame feature descriptor used to classify voicing quality and speaker characteristics in automatic speech recognition pipelines. Remove speech recognition and CPP's primary sustained use-case vanishes.
- cmrs17h6q00ex7kw4dwgi8ub7SERVES →
CPP measures the prominence of peaks in the cepstrum, which directly correlates with pitch periodicity — a core prosodic dimension. Speech prosody analysis uses CPP as a feature to quantify intonation, stress, and rhythmic properties. The metric serves prosody research by providing a quantitative measure of periodic structure.
- audio-processingSERVES →
Cepstral peak prominence is a metric built and maintained for the sake of audio processing practice: it measures the salience of the cepstral peak for voice quality assessment, detecting periodicity and vocal effort in speech analysis toolchains. Servant→master per Law 8d.
- cmspg0fzk056ijlss3ydafq7bDEPENDS_ON →
CPP requires spectral decomposition to compute the power spectrum (step 2 of cepstrum calculation). Remove spectral-analysis and the cepstrum cannot be computed, so CPP stops operating. Present-tense constitutive dependency.
- cmspjfefp05lxjlssg1w6gyuvDEPENDS_ON →
Cepstral peak prominence is computed from the cepstrum: the prominence is the magnitude of the peak in the real cepstrum. Remove the cepstrum and the prominence measure has no input and stops operating.
- cmss58fwp016nh7yubceby6nhSERVES →
Cepstral peak prominence quantifies periodicity strength per frame and is built for the sake of voice-activity-detection tasks where periodicity discriminates speech from non-speech. The metric is used as a feature to drive VAD decisions; remove CPP and VAD loses a periodicity-based cue and its operation degrades. Servant points at master per Law 8d.
- cmss0y7r700vsh7yuppfym4fzINSTANCE_OF →
Cepstral peak prominence is a specific kind of audio-feature: a per-frame scalar descriptor extracted from a speech (audio) signal via cepstral computation, used for voice-quality analysis and classification — it fits audio-feature's accepted definition exactly (numeric descriptor derived from a digital audio signal through computational processing, serving downstream classification tasks). Nearest existing kind is audio-feature: no cepstral-feature or speech-feature entry exists. This completes the ladder cpp -> audio-feature -> feature, where audio-feature INSTANCE_OF feature is already ACCEPTED (Law 11e).
- fast-fourier-transformDEPENDS_ON →
Remove FFT — cepstral-peak-prominence stops operating. CPP is computed as the peak of the cepstrum, which requires FFT → log-spectrum → IFFT pipeline. Without DFT/FFT, no cepstrum can be computed.
- speech-processingSERVES →
Cepstral peak prominence is designed and maintained for the sake of speech-processing: it quantifies vocal clarity by measuring the relative prominence of the cepstral peak corresponding to fundamental frequency. Without speech-processing applications (voice quality assessment, prosody analysis, pathology detection), cepstral-peak-prominence would have no reason to be computed or maintained — its entire purpose is to serve speech analysis systems.
- digital-audioSERVES →
CPP extracts periodicity features from speech signals, and these features are consumed by digital-audio applications — voice conversion, speech synthesis, and pitch manipulation all depend on CPP extraction. Remove CPP and these audio processing pipelines lose a core feature, though they still operate with alternative features.
Relations to this entry
No accepted relations in this direction.
Record identity
- Created
- Sep 4, 2026, 9:45 PM UTC
- Content hash
- ce70bb4d62049d2c03535260dd3ff3f15a2a4fda6642426036c7ad951ae52d85