This page gathers the 64 dictionary entries belonging to the domain “Signal processing”, as labelled by Wiktionary. Each word leads to its full entry: definitions, etymology, pronunciation, examples.
- alias verb To make or become indistinguishable.
- alpha-beta filter noun An algorithm for data estimation and smoothing, closely related to Kalman filters, based on an approximation model with two internal…
- autocorrelation noun The cross-correlation of a signal with itself: the correlation between values of a signal in successive time periods.
- B-frame noun A compressed video frame which is reconstructed based on its differences from both the previous and the subsequent frame.
- black top-hat transform noun A form of the top-hat transform that finds the elements in the input image that are darker than their surroundings.
- blocking noun A rectangular discontinuity as an artifact of separating a discrete signal into blocks that are processed individually.
- cepstrum noun The inverse Fourier transform of the logarithm of a magnitude spectrum; used especially in voice analysis.
- cisoid noun Complex sinusoid or complex exponential.
- clip verb To cut off a signal level at a certain maximum value.
- clipping noun The process of cutting off a signal level that rises above a certain maximum level.
- coarray noun The set of vector differences between the transmit and receive arrays.
- comb filter noun A filter that adds a delayed version of a signal to itself, causing constructive and destructive interference.
- compressed sensing noun A signal processing technique for efficiently acquiring and reconstructing a signal, by finding solutions to underdetermined linear systems.
- correlator noun A type of device used to compare two signals
- data acquisition noun The process of sampling signals that measure real-world physical conditions and converting the resulting samples into digital numeric…
- decimation noun A digital signal-processing technique for reducing the number of samples in a discrete-time signal; downsampling
- deviation ratio noun The ratio of maximum permitted frequency deviation, σₘₐₓ to the maximum permitted modulating frequency, fiₘₐₓ.
- dither verb To use dot patterns in an image or graphic to simulate colors or shades not in the system palette.
- equalize verb To adjust the balance between frequency components within an electronic signal.
- fade time noun The time during which a wireless signal is too faint to be accurately received.
- filter bank noun An array of band-pass filters that separates the input signal into multiple components, each one carrying a single frequency subband of the…
- footroom noun Extra bandwidth for lower-than-expected values.
- forward echo noun Synonym of pre-echo.
- Gabor atom noun A kind of function used in the analysis proposed by Dennis Gabor in 1946 in which a family of functions is built from translations and…
- Gabor transform noun A special case of the short-time Fourier transform, used to determine the sinusoidal frequency and phase content of local sections of a…
- Gabor wavelet noun A form of wavelet designed so as to minimize the product of its standard deviations in the time and frequency domain.
- gating noun The control of the flow of signals based on certain conditions or criteria.
- Hadamard transform noun A generalized Fourier transform that performs an orthogonal, symmetric, involutive, linear operation on 2ᵐ real numbers (or complex…
- Hann function noun A discrete window function, w(n)=1/2;(1- cos ((2πn)/(N-1))), typically used to select a subset of a series of samples in order to perform a…
- interframe noun A video frame which is compressed to express only the change from a reference frame.
- intraframe noun A video frame that does not depend on any other frame for rendering, but simply presents a fixed image. Usually subject to spatial…
- lifter noun A filter that operates on a cepstrum.
- macroblock noun A block of adjacent pixels, typically a rectangular 16×16 block
- model-based design noun A mathematical and visual method of addressing problems associated with designing complex control, signal processing and communication…
- multitaper noun A technique to estimate the power spectrum of a stationary ergodic finite-variance random process, using several different data tapers…
- multitapered adj Employing the multitaper technique.
- noiselet noun Any of a family of functions related to wavelets, analogous to the way that the Fourier basis is related to a time domain signal.
- octave noun Any of a number of coherent-noise functions of differing frequency that are added together to form Perlin noise.
- overbound noun A Gaussian model of the (non-Gaussian) error distribution on a signal, which is conservative enough that the resulting confidence interval…
- overfilter noun A morphological filter (idempotent operator) whose image is a superset of the domain.
- paraunitary adj Of or relating to a kind of matrix that occurs in the construction of filter banks used in multirate digital systems.
- peak verb To exceed the maximum signal amplitude of (a piece of equipment), resulting in clipping of the signal.
- pre-echo noun A digital audio compression artifact where a (typically percussive) sound is heard before it should occur.
- pull down noun The conversion of video footage to a higher frame rate by duplicating certain frames.
- quantization noun The process of approximating a continuous signal by a set of discrete symbols or integer values
- reliable adj Such that either a sent packet will reach its destination, even if it requires retransmission, or the sender will be told that it didn't.
- sample verb To reduce a continuous signal (such as a sound wave) to a discrete signal.
- sampling noun The measurement, at regular intervals, of the amplitude of a varying waveform in order to convert it to digital form.
- scalogram noun A visual representation of a wavelet transform, having axes for time, scale, and coefficient value, analogous to a spectrogram
- shimmer noun A measure of the irregularities in the loudness of a particular pitch over time.
- sine wave noun A periodically oscillating waveform as described by the sine function, possibly multiplied by some amplitude, shifted by some phase, and…
- synthesis noun Creation of a complex waveform by summation of simpler waveforms.
- time reversal signal processing noun A technique that either creates an optimal carrier signal for communication, reconstructs a source event, or focuses on high-energy waves…
- time-domain averaging noun A method for processing and analyzing signals, particularly when there is a requirement to reduce the impact of short-term fluctuations or…
- time-frequency analysis noun A technique that studies a signal in both the time and frequency domains simultaneously, using various time-frequency representations.
- transparency noun Sufficient accuracy to make the compressed result perceptually indistinguishable from the uncompressed input.
- transparent adj Having the property of transparency, i.e. sufficiently accurate that the compressed result is perceptually indistinguishable from the…
- underfilter noun A morphological filter (idempotent operator) whose image is a subset of the domain.
- unvoiced adj That does not contain voice.
- voiced adj That contains voice.
- white top-hat transform noun A form of the top-hat transform that finds the elements in the input image that are brighter than their surroundings.
- window verb To apply a window function to (a signal).
- window function noun A function that limits a signal to a restricted portion of time or frequencies.
- windowing noun The multiplication of a signal by a window function, restricting the signal to a specific time segment.