# Tags

A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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a mathematical representation of relationship between input and output (signal) of a linear, time-invariant system.
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its output when presented with a brief input signal, called an impulse.
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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…
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a technique for approximating an unobserved signal from an observed signal containing noise.
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a mathematical function that is zero-valued outside of some chosen interval.
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OFDM stands for Orthogonal, Frequency-Division Multiplexing.
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the study of speech signals and the processing methods of these signals.
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a method of constructing new data points within the range of a discrete set of known data points.
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the act of extracting the original information-bearing signal from a modulated carrier wave.
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a time-varying spectral representation (forming an image) that shows how the spectral density of a signal varies with time.
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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…
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a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range.
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a processing unit specialized for digital signal processing tasks.
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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").
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the difference between the upper and lower frequencies in a contiguous set of frequencies
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a measure of similarity of two waveforms as a function of a time-lag applied to one of them.
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a filter that self-adjusts its transfer function according to an optimization algorithm driven by an error signal.
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Related to the calculation, verification, usage, and requirements for Mel Frequency Cepstral Coefficients.
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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.
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the study of the collection, organization, analysis, and interpretation of data.
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In signal processing, downsampling (or "subsampling") is the process of reducing the sampling rate of a signal.
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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…
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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…