downsampling
Reducing resolution deliberately
Downsampling is the process of reducing the amount of data in a dataset, signal, or image.
In audio and video processing, it means lowering the sample rate or resolution, which shrinks file size but may sacrifice quality.
In statistics and machine learning, downsampling refers to reducing the number of observations, often to balance an uneven dataset where one category vastly outnumbers another.
We downsampled the audio from 96kHz to 44.1kHz.
Near-total destruction
- aliasingSignal misidentification from undersampling
- bandwidthData transmission capacity
- filteringSelective passage of elements
- quantizationConversion to discrete values
reconstruction · interpolation · analog-to-digital · frequency · spectrum · Shannon · preprocessing · conversion
Near-total destruction
- bitrateData transfer speed
- quantizationConversion to discrete values
- ADCMilitary personal assistant
- ditheringProlonged indecisive hesitation
waveform · analog-to-digital · bit-depth · oversampling · MP3 · FLAC
Formal decision or determination
- pixelsDisplay's smallest points
- interpolationEstimating between known values
- scalingClimbing or resizing
- artifactsHuman-made historical objects
moire · pixelation · thumbnail · low-res · texture · bilinear · antialiasing · compression
Quantity produced together
- oversamplingSampling above required frequency
- preprocessingInitial data preparation steps
- datasetOrganized collection of information
- epochDistinct historical period
Portion taken from larger group
- stratifiedArranged in stacked layers
- bootstrapStart without external resources
- representativeOne who acts for another
- datasetOrganized collection of information
bias · variance · population · survey · census · thinning · cross-validation · oversampling
decimation
Near-total destruction
- aliasingSignal misidentification from undersampling
- bandwidthData transmission capacity
- filteringSelective passage of elements
quantization · reconstruction · interpolation · analog-to-digital · frequency · spectrum · Shannon · preprocessing · conversion · discrete
decimation
Near-total destruction
- bitrateData transfer speed
- quantizationConversion to discrete values
- ADCMilitary personal assistant
dithering · waveform · analog-to-digital · bit-depth · oversampling · MP3 · FLAC
resolution
Formal decision or determination
- pixelsDisplay's smallest points
- interpolationEstimating between known values
- scalingClimbing or resizing
artifacts · moire · pixelation · thumbnail · low-res · texture · bilinear · antialiasing · compression · JPEG
batch
Quantity produced together
- oversamplingSampling above required frequency
- preprocessingInitial data preparation steps
- datasetOrganized collection of information
subsample
Portion taken from larger group
- stratifiedArranged in stacked layers
- bootstrapStart without external resources
- representativeOne who acts for another
dataset · bias · variance · population · survey · census · thinning · cross-validation · oversampling
downsamplingupsampling
Increasing data resolution
oversampling · supersampling · interpolation · upscaling · magnification
sample, sampling, sampler, resampling, resample, resampled, sampling rate, upsampling, upsample