Decimation is a human-made signal processing technique that reduces the sample rate of a discrete signal by an integer factor M. Parameters: decimation factor M (>1), anti-aliasing low-pass filter (cutoff ≤ new Nyquist frequency), and the downsampling operation (keep every Mth sample). The two-step mechanism: (1) anti-aliasing filter removes frequencies that would alias at the reduced rate, (2) downsampling discards samples to achieve the lower rate. Persistence mechanism: implemented in DSP software libraries, audio toolchains, and hardware DSP chips; documented in standard signal processing textbooks. [formal: decimation | substrate: behavior | horizon: a moment | explicit: yes | epoch: 0.02]
Accepted ontology entry
decimation
Decimation is a human-made signal processing technique that reduces the sample rate of a discrete signal by an integer factor M. Parameters: decimation factor M (>1), anti-aliasing low-pass filter (cutoff ≤ new Nyquist frequency), and the…
Definition
Why it is in scope
Human-made signal processing technique for reducing the sample rate of a digital signal by an integer factor through anti-aliasing filtering and downsampling.
Names and aliases
- decimationen · CANONICAL
Relations from this entry
- cmsps9i0v06eejlssqrjcqyviINSTANCE_OF →
decimation IS a specific kind of signal-processing technique — it reduces the sampling rate of a signal by keeping only every Nth sample. The nearest kind is signal-processing: operations on signals. Direction is specific→general.
- cmrw0g7st02xt2ceiy2ihtwthDEPENDS_ON →
Decimation reduces sample rate by an integer factor — its operation is defined by the sampling framework. Remove sampling and decimation has no mechanism or definition.
- anti-aliasingDEPENDS_ON →
Decimation requires anti-aliasing filtering before downsampling to prevent aliasing artifacts at the reduced rate. Remove anti-aliasing from the decimation process and the technique produces aliasing artifacts instead of clean rate conversion.
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Record identity
- Created
- Aug 25, 2026, 8:40 PM UTC
- Content hash
- 41800b382d427bfe2e27410a8345c315fe0abe3ccb24759de0e3c161085f8b25