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a mathematical method using noisy measurements observed over time to produce values that tend to be closer to the true values of the measurements and their associated calculated v…
a mathematical representation of relationship between input and output (signal) of a linear, time-invariant system.
its output when presented with a brief input signal, called an impulse.
a technique for approximating an unobserved signal from an observed signal containing noise.
a mathematical function that is zero-valued outside of some chosen interval.
a method of constructing new data points within the range of a discrete set of known data points.
a time-varying spectral representation (forming an image) that shows how the spectral density of a signal varies with time.
the act of extracting the original information-bearing signal from a modulated carrier wave.
the study of speech signals and the processing methods of these signals.
a mathematical technique to convert data in one domain to another. The most common example is using the Fourier Transform to convert data from the time domain to t…
a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range.
the process of converting the spoken word to text, usually without regard to a particular speaker (which is more commonly referred to as "voice recognition").
a measure of similarity of two waveforms as a function of a time-lag applied to one of them.
the difference between the upper and lower frequencies in a contiguous set of frequencies
Signal-to-noise ratio (often abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise.
a filter that self-adjusts its transfer function according to an optimization algorithm driven by an error signal.
Related to the calculation, verification, usage, and requirements for Mel Frequency Cepstral Coefficients.
In signal processing, downsampling (or "subsampling") is the process of reducing the sampling rate of a signal.
an operator of a function of time or frequency domain that, unlike the Fourier Transform, returns a function in the same domain. The Hilbert Transform of $ x \left( t \right) $ e…
the study of the collection, organization, analysis, and interpretation of data.