oversampling
Redundant data collection
Oversampling is collecting data from a subgroup at higher rates than its actual proportion in a population.
Researchers oversample minority groups to ensure enough responses for meaningful statistical analysis: The study oversampled rural households to compare urban and rural outcomes.
In audio and signal processing, oversampling means sampling at a rate higher than necessary to capture the original signal, improving quality or enabling further processing.
Signal misidentification from undersampling
- upsamplingIncreasing data resolution
- interpolationEstimating between known values
- bit-depthBits per sample measurement
- analog-to-digitalContinuous-to-discrete signal transformation
quantization · ADC · DAC · reconstruction · bandwidth · waveform · dithering · decimation
Division into distinct levels
- estimationApproximate value judgment
- inferenceConclusion reached through reasoning
- populationAll inhabitants combined
- varianceSpread around the mean
bootstrap · representativeness · proportional · disproportionate · census
Systematic grouping by traits
- upsamplingIncreasing data resolution
- overfitExcessive model specificity
- cross-validationResampling method for model assessment
- interpolationEstimating between known values
aliasing
Signal misidentification from undersampling
- upsamplingIncreasing data resolution
- interpolationEstimating between known values
- bit-depthBits per sample measurement
analog-to-digital · quantization · ADC · DAC · reconstruction · bandwidth · waveform · dithering · decimation
stratification
Division into distinct levels
- estimationApproximate value judgment
- inferenceConclusion reached through reasoning
- populationAll inhabitants combined
variance · bootstrap · representativeness · proportional · disproportionate · census
classification
Systematic grouping by traits
- upsamplingIncreasing data resolution
- overfitExcessive model specificity
- cross-validationResampling method for model assessment
- pollingpoll, polling, pollster, opinion poll, exit poll
- Sigma-Delta Convertersquantizer, integrator, feedback loop
- Signal ConversionADC, DAC, converter, codec, encode
- filtersair filter, HEPA filter, carbon filter, screen filter, highpass
- Anti-Aliasingsupersampling, multisampling
- Image Sensorsimage sensor, CCD, CMOS, pixel, photodiode
sample, samples, sampling, sampled, sampler, samplers, resampling, subsample, resample