Sampling
Encyclopedia
Sampling may refer to:
Specific types of sampling include:
- Sampling (signal processing)Sampling (signal processing)In signal processing, sampling is the reduction of a continuous signal to a discrete signal. A common example is the conversion of a sound wave to a sequence of samples ....
, converting a continuous signal into a discrete signal - Sampling (graphics)Sample (graphics)In computer graphics, a sample is an intersection of channel and a pixel.The diagram below depicts a 24-bit pixel, consisting of 3 samples for Red, Green, and Blue....
, converting continuous colors into discrete color components - Sampling (music)Sampling (music)In music, sampling is the act of taking a portion, or sample, of one sound recording and reusing it as an instrument or a different sound recording of a song or piece. Sampling was originally developed by experimental musicians working with musique concrète and electroacoustic music, who physically...
, re-using portions of sound recordings in a piece- Sampler (musical instrument)Sampler (musical instrument)A sampler is an electronic musical instrument similar in some respects to a synthesizer but, instead of generating sounds, it uses recordings of sounds that are loaded or recorded into it by the user and then played back by means of a keyboard, sequencer or other triggering device to perform or...
, an electronic music instrument that plays back sound recordings on command
- Sampler (musical instrument)
- Sampling (statistics)Sampling (statistics)In statistics and survey methodology, sampling is concerned with the selection of a subset of individuals from within a population to estimate characteristics of the whole population....
, selection of observations to acquire some knowledge of a statistical population - Sampling (case studies), selection of cases for single or multiple case studies
- Sampling (audit), application of audit procedures to less than 100% of population to be audited
- Sampling (medicine)Sampling (medicine)In medicine, sampling is gathering of matter from the body to aid in the process of a medical diagnosis and/or evaluation of an indication for treatment, further medical tests or other procedures...
, gathering of matter from the body to aid in the process of a medical diagnosis and/or evaluation of an indication for treatment, further medical tests or other procedures. - Sampling (for testing or analysis), taking a representative portion of a material or product to test (e.g. by physical measurements, chemical analysis, microbiological examination), typically for the purposes of identification, quality control, or regulatory assessment
Specific types of sampling include:
- Chorionic villus samplingChorionic villus samplingChorionic villus sampling , sometimes misspelled "chorionic villous sampling", is a form of prenatal diagnosis to determine chromosomal or genetic disorders in the fetus. It entails sampling of the chorionic villus and testing it...
, a method of detecting fetal abnormalities - Food samplingFood samplingFood sampling is a process used to check that a food is safe and that it does not contain harmful contaminants, or that it contains only permitted additives at acceptable levels, or that it contains the right levels of key ingredients and its label declarations are correct, or to know the levels of...
, the process of taking a representative portion of a food for analysis, usually to test for quality, safety or compositional compliance. (Not to be confused with Food, free samplesFree sampleA product sample is a sample of a consumer product that is given to the consumer so that he or she may try a product before committing to a purchase.-Free samples:...
, a method of promoting food items to consumers) - Oil sampling, the process of collecting samples of oil from machinery for analysis
- Theoretical samplingTheoretical samplingTheoretical sampling refers to the process of choosing new research sites or cases to compare with ones that have already been studied. It is one of the tools of qualitative research...
, the process of selecting comparison cases or sites in qualitative research - Water sampling, the process of taking a portion of water for analysis or other testing, e.g. drinking water to check that it complies with relevant water quality standards, or river water to check for pollutants, or bathing water to check that it is safe for bathing, or intrusive water in a building to identify its source.
- Work samplingWork samplingWork Sampling is the statistical technique for determining the proportion of time spent by workers in various defined categories of activity...
, a method of estimating the standard time for manufacturing operations.