Sample-rate-conversion is a digital signal processing technique that changes the sample rate of a discrete-time audio signal from one rate to another. Its parameters are: source_rate (original sampling frequency, e.g. 44100 Hz), target_rate (desired sampling frequency, e.g. 48000 Hz), and interpolation_method (the algorithm used to estimate intermediate values: linear interpolation, sinc-based resampling, polyphase filtering, or FFT-based overlap-add). It persists as a processing stage in digital audio pipelines — implemented as software libraries (libsamplerate, SoX, FFmpeg), hardware DSP blocks in audio interfaces, and real-time audio engines that match buffer rates across different subsystems. The conversion is lossy when the target rate is lower (information is discarded); it is reversible only when the target rate is a rational multiple of the source and the original sample rate exceeds the Nyquist rate of the content. [formal: sample-rate-conversion | substrate: mind | horizon: hours | explicit: yes | epoch: 0.03]
Accepted ontology entry
sample-rate-conversion
Sample-rate-conversion is a digital signal processing technique that changes the sample rate of a discrete-time audio signal from one rate to another. Its parameters are: source_rate (original sampling frequency, e.g. 44100 Hz), target_rat…
Definition
Why it is in scope
a human-made signal-processing procedure, built to persist as the standardized resampling stage inside audio codecs, converters, and DSP toolkits
Names and aliases
- sample-rate-conversionen · CANONICAL
Relations from this entry
- cmsps9i0v06eejlssqrjcqyviINSTANCE_OF →
sample-rate-conversion is a specific kind of signal processing: a named procedure that transforms a discrete-time signal between sampling rates via filtering + resampling. A competent DSP practitioner calls it 'a signal-processing technique' — kind-of (Law 9), nearest kind is signal-processing. Not an output (unlike spectrogram) and not a sub-step; it is a full pipeline stage.
- cmspchura04rdjlssvam2ao1aDEPENDS_ON →
Sample-rate-conversion as a resampling procedure requires anti-aliasing filtering to prevent aliasing artifacts; remove the anti-aliasing filter mechanism and the conversion stops operating as a correct procedure.
- cmsdfdqpw03tt3vv3zzh0uh0qINSTANCE_OF →
Sample-rate-conversion is a specific kind of resampling: it changes the sample rate of a digital audio signal. A competent speaker would call it 'a resampling technique.' Nearest kind is resampling, not the broader digital-audio.
Relations to this entry
- windowed-sinc-interpolation← SERVES
windowed-sinc-interpolation is built as the interpolation primitive used inside sample-rate-conversion implementations; remove the interpolator and the conversion stops operating as a high-quality resampler.
Record identity
- Created
- Aug 19, 2026, 11:25 PM UTC
- Content hash
- 43ec32adf179243a035e70e7a0cff6f8033dc7d434c2858135c7e2835f38cac2