oversample
Duplicate minority instances
To oversample is to collect more data from a particular group than their proportion in the overall population would warrant.
In statistics and machine learning, oversampling addresses imbalanced datasets by duplicating or synthesizing examples from underrepresented categories: We oversampled minority cases to improve the model's accuracy.
In audio, oversampling means sampling at a rate higher than necessary to capture the signal, reducing distortion and noise.
Captured audio or video
- clippingPiece cut out
- distortionTwisting from original state
- bit depthBits per sample value
- quantizationConversion to discrete values
digital audio · ADC · DAC · aliasing · bandwidth · headroom · dynamic range · resolution
All inhabitants combined
- dataFacts for analysis
- surveySystematic data collection
- stratificationDivision into distinct levels
- weightingAssigning relative importance values
bootstrap · upsampling · interpolation · augmentation · representativeness · subgroup · rare events · confidence interval
Insufficiently present in proportion
- imbalancedUnevenly distributed or proportioned
- correctionFixing of mistakes
- weightingAssigning relative importance values
- fairnessJust and equal treatment
equity · representativeness · stratification · demographic · subgroup · disparity · skew · adjustment
recording
Captured audio or video
- clippingPiece cut out
- distortionTwisting from original state
- bit depthBits per sample value
quantization · digital audio · ADC · DAC · aliasing · bandwidth · headroom · dynamic range · resolution · fidelity
population
All inhabitants combined
- dataFacts for analysis
- surveySystematic data collection
- stratificationDivision into distinct levels
weighting · bootstrap · upsampling · interpolation · augmentation · representativeness · subgroup · rare events · confidence interval · variance
underrepresented
Insufficiently present in proportion
- imbalancedUnevenly distributed or proportioned
- correctionFixing of mistakes
- weightingAssigning relative importance values
fairness · equity · representativeness · stratification · demographic · subgroup · disparity · skew · adjustment · proportional
oversampledownsample
Reduce signal resolution
underrepresent · subsample · decimate · undercount · exclude