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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 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 technique for approximating an unobserved signal from an observed signal containing noise.
a mathematical function that is zero-valued outside of some chosen interval.
the study of speech signals and the processing methods of these signals.
a method of constructing new data points within the range of a discrete set of known data points.
the act of extracting the original information-bearing signal from a modulated carrier wave.
a time-varying spectral representation (forming an image) that shows how the spectral density of a signal varies with time.
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").
the difference between the upper and lower frequencies in a contiguous set of frequencies
a measure of similarity of two waveforms as a function of a time-lag applied to one of them.
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.
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.
the study of the collection, organization, analysis, and interpretation of data.
In signal processing, downsampling (or "subsampling") is the process of reducing the sampling rate of a signal.
Pitch of an audio signal representing a musical note, measured in units of octave and relative to a pitch standard such as A440, is the base-2 logarithm of the frequency ratio of the fundamental frequ…