window

en-noun

window (countable and uncountable, plural windows)

From Middle English wyndowe, wyndown, from Old Norse vindauga (“window”, literally “wind-eye; wind-hole”), equivalent to wind + eye. Cognate with Scots windae and windock, Faroese vindeyga, Norwegian Bokmål vindu, Norwegian Nynorsk vindauge, Danish vindue, archaic Swedish vindöga, Elfdalian windog and older German Windauge. Displaced native Old English ēagþȳrel (literally “eye hole”) (the rare direct descendant is eyethurl (“window, pupil, etc.”)). The “windows” among early Germanic peoples were just unglazed holes (eyes) in the wall or roof that permitted wind to pass through .

ncog

not have a pot to piss in or a window to throw it out of

(signal processing) A function multiplied with a signal to reduce spectral leakage when performing a Fourier transform.


window

en-verb

window (third-person singular simple present windows, present participle windowing, simple past and past participle windowed)

windows (present singular third-person)
windowing (participle present)
windowed (participle past)
windowed (past)

(transitive, signal processing) To apply a window function to (a signal).


transparent

en-adj

transparent (comparative more transparent, superlative most transparent)

more transparent (comparative)
most transparent (superlative)

Borrowed from Medieval Latin trānspārēns, trānspārēntis (“transparent”), present participle of transpareō, from Latin trans + pareō. Displaced native Old English þurhsīene.

bor

(signal processing) Having the property of transparency, i.e. sufficiently accurate that the compressed result is perceptually indistinguishable from the uncompressed input.


reliable

en-adj

reliable (comparative more reliable, superlative most reliable)

more reliable (comparative)
most reliable (superlative)

/ɹɪˈlaɪəbəl/

(signal processing, of a communication protocol) 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


synthesis

en-noun

synthesis (countable and uncountable, plural syntheses)

From Latin synthesis, from Ancient Greek σύνθεσις (súnthesis, “a putting together; composition”), from συντίθημι (suntíthēmi, “put together, combine”), from συν- (sun-, “together”) + τίθημι (títhēmi, “set, place”). Doublet of sandhi.

der

(signal processing) Creation of a complex waveform by summation of simpler waveforms.


alias

From Latin alias (“at another time; at another place, elsewhere, under other circumstances, otherwise”). See else and alien.

bor

(signal processing) An spurious signal generated as a technological artifact.


alias

en-verb

alias (third-person singular simple present aliases, present participle aliasing, simple past and past participle aliased)

aliases (present singular third-person)
aliasing (participle present)
aliased (participle past)
aliased (past)

When the signal frequency reaches half the sampling frequency, there are only two samples per cycle, which is the absolute minimum needed to record a waveform. A higher frequency would cause the digitization system to alias.

1989, Ken C. Pohlmann, The compact disc: a handbook of theory and use, page 22:

Finally, as it is a frequency detection technique, color Doppler US has the potential to alias

1999, Carlo Bartolozzi with Riccardo Lencioni, Liver malignancies: diagnostic and interventional radiology, page 59:

This technique can be used to alias the L1 and L2 bands of the GPS into the baseband

2005, James Bao-yen Tsui, Fundamentals of global positioning system receivers, page 106:

(signal processing, of two signals, transitive, intransitive) To make or become indistinguishable.


FFT

fast Fourier transform
fast Fourier transform#English

(signal processing) Initialism of fast Fourier transform.


octave

From Latin octavus (“eighth”). Doublet of octavo, ochava, and oitava.

Octave in the Encyclopædia Britannica (11th edition, 1911)

(signal processing) Any of a number of coherent-noise functions of differing frequency that are added together to form Perlin noise.


decimation

en-noun

decimation (countable and uncountable, plural decimations)

/ˌdɛsɪˈmeɪʃən/

Borrowed from Latin decimātiō, a punishment where every 10th man in a unit would be stoned to death by the men who were spared. Used by the Romans to keep order in their military. Compare septimation and vicesimation.

desimointi

creation of a new sequence comprising every nth element of the original

(mathematics) The creation of a new sequence comprising only every nth element of a source sequence.

(signal processing) A digital signal-processing technique for reducing the number of samples in a discrete-time signal; downsampling

quintation (1

proportionate reduction, by single aliquot part


peak

en-verb

peak (third-person singular simple present peaks, present participle peaking, simple past and past participle peaked)

peaks (present singular third-person)
peaking (participle present)
peaked (participle past)
peaked (past)

From earlier peake, peek, peke, from Middle English pek (in place names), itself an alteration of pike, pyke, pyk (“a sharp point, pike”), from Old English pīc, piic (“a pike, needle, pin, peak, pinnacle”), from Proto-Germanic *pīkaz (“peak”). Cognate with Dutch piek (“pike, point, summit, peak”), Danish pik (“pike, peak”), Swedish pik (“pike, lance, point, peak”), Norwegian pik (“peak, summit”). More at pike.

cog

"Dr. Reynders?" Udo prodded.

2023 September 22, HarryBlank, “Off Track”, in SCP Foundation, archived from the original on 2024-05-25:

(transitive, signal processing) To exceed the maximum signal amplitude of (a piece of equipment), resulting in clipping of the signal.


clip

en-verb

clip (third-person singular simple present clips, present participle clipping, simple past and past participle clipt or clipped)

clips (present singular third-person)
clipping (participle present)
clipt (participle past)
clipt (past)
clipped (participle past)
clipped (past)

From Middle English clippen, from Old Norse klippa (“to clip, cut the hair, shear sheep”). Cognate with Icelandic klippa (“to clip”), Swedish klippa (“to clip”), Danish klippe (“to clip”), Norwegian Bokmål klippe (“to clip”).

der

The WFM display above shows a very contrasty picture with clipped whites and blacks.

2004, John Jackman, Lighting for Digital Video and Television, page 25:

(signal processing) To cut off a signal level at a certain maximum value.


GOP

Acronym of group of pictures, a collection of successive pictures within a coded video stream.

group of pictures
group of pictures#English

(signal processing, video compression) Acronym of group of pictures.


sine wave

(trigonometry, signal processing) A periodically oscillating waveform as described by the sine function, possibly multiplied by some amplitude, shifted by some phase, and translated by an additive constant.


deviation ratio

en-noun

deviation ratio (plural deviation ratios)

(signal processing) The ratio of maximum permitted frequency deviation, σₘₐₓ to the maximum permitted modulating frequency, fiₘₐₓ.


sample

en-verb

sample (third-person singular simple present samples, present participle sampling, simple past and past participle sampled)

samples (present singular third-person)
sampling (participle present)
sampled (participle past)
sampled (past)

From Middle English saumple, sample, from Old French essample (“example”), from Latin exemplum. Doublet of example and exemplum.

(transitive, signal processing) To reduce a continuous signal (such as a sound wave) to a discrete signal.

дигитализирам

signal processing: to reduce a continuous signal to a discrete signal


sampling

en-noun

sampling (countable and uncountable, plural samplings)

(signal processing) The measurement, at regular intervals, of the amplitude of a varying waveform in order to convert it to digital form.


transparency

transparency (countable and uncountable, plural transparencies)

Borrowed from Medieval Latin trānspārentia.

bor+

(signal processing) Sufficient accuracy to make the compressed result perceptually indistinguishable from the uncompressed input.


quantization

en-noun

quantization (countable and uncountable, plural quantizations)

(uncountable, signal processing) The process of approximating a continuous signal by a set of discrete symbols or integer values


ZF

In the case of the ZF detector, we suppress the interference among the transmit streams by multiplying the received signal vector y with the Moore-Penrose pseudo-inverse of the channel matrix […]

2008, Byeong Gi Lee, Sunghyun Choi, Broadband Wireless Access and Local Networks:

However, due to its simplicity, ZF equalization is a good choice when the channel is known and fixed, and also when there is no frequency notch in the channel frequency response […]

2010, Dayan Adionel Guimaraes, Digital Transmission, page 348:

Thus, the importance of the upper bound is in showing that even in the most optimistic case, the achievable rate cannot exceed the ZF rates by more than 10%.

2013, Academic Press Library in Signal Processing, page 308:

(telecommunications, signal processing) Initialism of zero forcing.


unvoiced

The unvoiced signal is smaller energy than voiced signal and, so, this section is applied the smaller threshold.

1999, ISIE ..., volumes 1-3, IEEE Service Center:

(signal processing, of a signal) That does not contain voice.


pull-down

pull-down (countable and uncountable, plural pull-downs)

LL-Q1860 (eng)-Flame, not lame-pull-down.wav

When a TV monitor is in shot, and the film is transferred to video through the normal 2:3 pulldown there will be a strobing effect where the film and video frame rates clash.

2013, David Mellor, Sound Person's Guide to Video, page 216:

(signal processing) The conversion of video footage to a higher frame rate by duplicating certain frames.


voiced

1999, IEEE Service Center, ISIE ..., Volumes 1-3:

(signal processing, of a signal) That contains voice.


clipping

clipping (countable and uncountable, plural clippings)

(uncountable, signal processing) The process of cutting off a signal level that rises above a certain maximum level.


lifter

From filter with the first syllable reversed. Modelled on the derivation of cepstrum from spectrum.

(signal processing) A filter that operates on a cepstrum.


shimmer

From Middle English schimeren, from Old English sċymrian, sċimrian, sċimerian, from Proto-Germanic *skimarōną. Cognate with Dutch schemeren, German schimmern.

Coordinate term: jitter

As such, perturbation measures can only be derived from vowels, most accurately, sustained vowels or steady-state portions of vowels extracted from connected speech. Two commonly obtained perturbation measures are jitter and shimmer.

2010, Daniel R. Boone, The Voice and Voice Therapy, Pearson College Division, →ISBN:

(signal processing) A measure of the irregularities in the loudness of a particular pitch over time.


PDM

(signal processing) Initialism of pulse-duration modulation.

(signal processing) Initialism of pulse-density modulation.


blocking

blocking (countable and uncountable, plural blockings)

Blocking is an annoying effect in image compression using JPEG especially at low bit-rates.

2017, Sekine Asadi Amiri, Hamid Hassanpour, Image compression using JPEG with reduced blocking effects via adaptive down-sampling and self-learning image sparse representation, →DOI, page 1:

(signal processing) A rectangular discontinuity as an artifact of separating a discrete signal into blocks that are processed individually.


gating

gating (countable and uncountable, plural gatings)

(electronics, signal processing) The control of the flow of signals based on certain conditions or criteria.


equalize

en-verb

equalize (third-person singular simple present equalizes, present participle equalizing, simple past and past participle equalized)

equalizes (present singular third-person)
equalizing (participle present)
equalized (participle past)
equalized (past)

The technique for frequency slewing of a transient is different from that for vibration testing in that it is necessary to equalize at low level as the clock frequency is slewed in relatively small increments from the nominal to the desired frequency.

1987, The Shock and Vibration Bulletin - Volume 57, Parts 1-4, page 35:

(signal processing) To adjust the balance between frequency components within an electronic signal.


aliasing

(signal processing, graphics, sound recording) Distortion caused by a low sampling rate, such as a moiré effect or jaggies.

graphics; sound recording; graphics; sound recording

grajneco

distortion caused by a low sampling rate


cisoid

(signal processing) Complex sinusoid or complex exponential.


packetize

packetize (third-person singular simple present packetizes, present participle packetizing, simple past and past participle packetized)

packetizes (present singular third-person)
packetizing (participle present)
packetized (participle past)
packetized (past)

(signal processing) To form data into packets, or bundled units, according to a specific protocol


packetization

en-noun

packetization (countable and uncountable, plural packetizations)

(signal processing) The act or process of bundling data into packets according to a specific protocol


autocorrelation

autocorrelation (countable and uncountable, plural autocorrelations)

Dividing the covariances by the variance gives the autocorrelations.

1990, K. Holden, D. Peel, John L. Thompson, Economic Forecasting, →ISBN, page 67:

(statistics, signal processing) The cross-correlation of a signal with itself: the correlation between values of a signal in successive time periods.

自相關 /自相关

statistics, signal processing: the cross-correlation of a signal with itself


interframe

Each keyframe becomes a reference for all the following interframes.

2003, Dan Livingston, Carlos Justiniano, Advanced Macromedia Flash MX, →ISBN, page 356:

(signal processing) A video frame which is compressed to express only the change from a reference frame.


intraframe

The frequency of intraframes determines the frequency of random access points for non-linear playback or editing.

1999, Francis Botto, Dictionary of Multimedia and Internet Applications, page 156:

(signal processing) A video frame that does not depend on any other frame for rendering, but simply presents a fixed image. Usually subject to spatial compression.


deshuffle

en-verb

deshuffle (third-person singular simple present deshuffles, present participle deshuffling, simple past and past participle deshuffled)

deshuffles (present singular third-person)
deshuffling (participle present)
deshuffled (participle past)
deshuffled (past)

Upon reception, the data packets are deshuffled by the deshuffler.

(signal processing) To restore shuffled data to its original ordered state.


B-frame

(signal processing) A compressed video frame which is reconstructed based on its differences from both the previous and the subsequent frame.


macroblock

(signal processing, video compression) A block of adjacent pixels, typically a rectangular 16×16 block


D-frame

(signal processing, video compression) A low-quality intraframe containing only DC components, used for high-speed previews.


I-frame

(signal processing, video compression) Abbreviation of intraframe.


P-frame

(signal processing, video compression) A video frame which contains only information on the differences from previous frames


correlator

(optics, signal processing) A type of device used to compare two signals


multitaper

(signal processing) A technique to estimate the power spectrum of a stationary ergodic finite-variance random process, using several different data tapers which are orthogonal to each other.


scalogram

(signal processing) A visual representation of a wavelet transform, having axes for time, scale, and coefficient value, analogous to a spectrogram


dither

dither (third-person singular simple present dithers, present participle dithering, simple past and past participle dithered)

dithers (present singular third-person)
dithering (participle present)
dithered (participle past)
dithered (past)

Variant of didder, from Middle English dideren (“to tremble”). Compare Middle English bididren, bididdren (“to seduce, deceive”), from Old English bedidrian, bedyderian (“to deceive, trick”).
Alternatively, perhaps with expressive voicing from *titeren, from Proto-Germanic *titrōną. If so, then a doublet of teeter and cognate with Old High German zittarōn (German zittern) and Old Norse titra (Faroese titra, Icelandic titra). Alternatively an unrelated reduplicative onomatopoeia.

Look at how pixelly this wall texture is. You almost don't even notice the dithering when driving by quick. Up close though, it's real chunky.

2023, Preston "Pretzel", 4:34 from the start, in Familiar and Unfamiliar Areas in Lego Island:

(electronics, technology, signal processing) To apply an algorithm to digital data to minimize the effects of quantization:

(computer graphics) To use dot patterns in an image or graphic to simulate colors or shades not in the system palette.

koostaa

(computing, graphics) to simulate a color digitally

To intentionally add noise to a signal to remove artifacts caused by digitization.


dither

en-noun

dither (countable and uncountable, plural dithers)

(electronics, technology, signal processing) Any algorithm applied to digital data to minimize the effects of quantization:

A form of noise intentionally added to remove artifacts caused by digitization.

(computer graphics) The use of dot patterns in an image or graphic to approximate colors not available in the system palette.

sirottelu

computer graphics: use of dot patterns to approximate colors


square wave

(calculus, engineering, signal processing) A function or waveform that alternates regularly and instantaneously between two levels.


cepstrum

From a reversal of the first syllable of the word spectrum.

inverse Fourier transform
Fourier transform

(signal processing) The inverse Fourier transform of the logarithm of a magnitude spectrum; used especially in voice analysis.

kepstri

Fourier transform of the logarithm of a spectrum


filter bank

(signal processing) An array of band-pass filters that separates the input signal into multiple components, each one carrying a single frequency subband of the original signal.


LPF

(signal processing) Initialism of low-pass filter.


depacketize

en-verb

depacketize (third-person singular simple present depacketizes, present participle depacketizing, simple past and past participle depacketized)

depacketizes (present singular third-person)
depacketizing (participle present)
depacketized (participle past)
depacketized (past)

(transitive, signal processing) To reconstruct (data) from the group of packets used in transmission.


repacketize

repacketize (third-person singular simple present repacketizes, present participle repacketizing, simple past and past participle repacketized)

repacketizes (present singular third-person)
repacketizing (participle present)
repacketized (participle past)
repacketized (past)

(transitive, signal processing) To packetize again or anew.


packetizer

(signal processing) A process that packetizes.


Wiener filter

(signal processing) A filter that takes a statistical approach to filtering out noise that has corrupted a signal.


depacketizer

(signal processing) A circuit or system that depacketizes.


pre-echo

en-noun

pre-echo (countable and uncountable, plural pre-echos or pre-echoes)

(signal processing) A digital audio compression artifact where a (typically percussive) sound is heard before it should occur.


subslice

(chiefly signal processing) A slice that makes up part of a larger slice.


Hann

en-verb

Hann (third-person singular simple present Hanns, present participle Hanning, simple past and past participle Hanned)

Hanns (present singular third-person)
Hanning (participle present)
Hanned (participle past)
Hanned (past)

From a Middle English given name derived from Johan, variant of John, or less often from Henry or Randolph.

(transitive, signal processing) To apply the Hann function to (a signal).


model-based design

en-noun

model-based design (plural model-based designs)

(electronics, communication, signal processing, mathematics, software testing) A mathematical and visual method of addressing problems associated with designing complex control, signal processing and communication systems.


convolver

(signal processing) An algorithm that performs convolution on a signal.


quefrency

LL-Q1860 (eng)-I learned some phrases-quefrency.wav

From frequency with the consonant sounds of the first and second syllables switched, perhaps modelled after cepstrum which is derived from spectrum.

(signal processing) The inverse of the distance between successive lines in a Fourier transform, measured in seconds.


liftering

From filtering with the first part reversed, like cepstrum from spectrum.

(signal processing) Filtering in the cepstral domain.


overbound

(mathematics, signal processing) A Gaussian model of the (non-Gaussian) error distribution on a signal, which is conservative enough that the resulting confidence interval is guaranteed to be at least as wide as the actual confidence interval.


impulse response

impulse response (plural impulse responses)

(signal processing) Output of a dynamic system when presented with a brief input signal.


Nyquist rate

(signal processing) Twice the bandwidth of a bandlimited function or a bandlimited channel.


noiselet

Further, we introduce a modification to the complex fast noiselet transform, which enables computationally-efficient real-time generation of the binary noiselet-based patterns using efficient integer calculations on bundled patterns.

2016, Anna Pastuszczak, Bartłomiej Szczygieł, Michał Mikołajczyk, Rafał Kotyński, “Efficient adaptation of complex-valued noiselet sensing matrices for compressed single-pixel imaging”, in arXiv:

(signal processing) Any of a family of functions related to wavelets, analogous to the way that the Fourier basis is related to a time domain signal.


prewhiten

en-verb

prewhiten (third-person singular simple present prewhitens, present participle prewhitening, simple past and past participle prewhitened)

prewhitens (present singular third-person)
prewhitening (participle present)
prewhitened (participle past)
prewhitened (past)

(signal processing, transitive) To modify (a data set) to make the samples statistically independent, analogous to white noise.


Whittle likelihood

en-noun

Whittle likelihood (plural Whittle likelihoods)

Named after the mathematician and statistician Peter Whittle, who introduced it in his PhD thesis in 1951.

(signal processing) An approximation to the likelihood function of a stationary Gaussian time series.


TFR

time-frequency representation
time-frequency representation#English

(signal processing) Initialism of time-frequency representation.


autocorrelate

en-verb

autocorrelate (third-person singular simple present autocorrelates, present participle autocorrelating, simple past and past participle autocorrelated)

autocorrelates (present singular third-person)
autocorrelating (participle present)
autocorrelated (participle past)
autocorrelated (past)

(transitive, signal processing) To cross-correlate (a signal) with itself.


window function

en-noun

window function (plural window functions)

(signal processing, statistics) A function that limits a signal to a restricted portion of time or frequencies.


coarray

(signal processing) The set of vector differences between the transmit and receive arrays.


compressed sensing

(statistics, signal processing) A signal processing technique for efficiently acquiring and reconstructing a signal, by finding solutions to underdetermined linear systems.


Butterworth filter

Butterworth filter (plural Butterworth filters)

First described in 1930 by the British engineer and physicist Stephen Butterworth.

(signal processing) A kind of filter designed to have as flat a frequency response as possible in the passband.


subshot

We propose a novel supervised learning technique for summarizing videos by automatically selecting keyframes or key subshots.

2016, Ke Zhang, Wei-Lun Chao, Fei Sha, Kristen Grauman, “Video Summarization with Long Short-term Memory”, in arXiv:

(signal processing) A portion of a shot, in video material.


Hadamard transform

Hadamard transform (plural Hadamard transforms)

Named for the French mathematician Jacques Hadamard.

(signal processing) A generalized Fourier transform that performs an orthogonal, symmetric, involutive, linear operation on 2ᵐ real numbers (or complex numbers, although the Hadamard matrices themselves are purely real).


FIR

finite impulse response
w:finite impulse response

(signal processing, of a filter) Initialism of finite impulse response; that has impulse response (or response to any finite length input) of finite duration.


HPF

(signal processing) Initialism of high-pass filter.


BPF

(signal processing) Initialism of band-pass filter.


artifacted

(computer graphics, signal processing) Having artifacts.


Hann function

Named after the Austrian meteorologist Julius von Hann.

(signal processing) 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 Fourier transform or other calculation.


top-hat transform

top-hat transform (plural top-hat transforms)

So called because a graph of the function has a shape resembling a top hat.

(mathematics, signal processing) A particular operation that extracts small elements and details from images.


bottom-hat transform

bottom-hat transform (plural bottom-hat transforms)

black top-hat transform
black top-hat transform#English

(mathematics, signal processing) Synonym of black top-hat transform


black top-hat transform

black top-hat transform (plural black top-hat transforms)

(mathematics, signal processing) A form of the top-hat transform that finds the elements in the input image that are darker than their surroundings.


white top-hat transform

white top-hat transform (plural white top-hat transforms)

(mathematics, signal processing) A form of the top-hat transform that finds the elements in the input image that are brighter than their surroundings.


Gabor transform

Gabor transform (plural Gabor transforms)

(signal processing) A special case of the short-time Fourier transform, used to determine the sinusoidal frequency and phase content of local sections of a signal as it changes over time.


Gabor filter

(signal processing) A linear filter used for image texture analysis.


Gabor wavelet

(signal processing) A form of wavelet designed so as to minimize the product of its standard deviations in the time and frequency domain.


Gabor atom

(signal processing) 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 modulations of a generating function.


comb filter

So called because its frequency response consists of a series of regularly spaced notches, giving the appearance of a comb.

(signal processing) A filter that adds a delayed version of a signal to itself, causing constructive and destructive interference.


PAPR

(signal processing) Initialism of peak-to-average power ratio.


notch filter

(signal processing) A bandstop filter with a narrow stopband.


rahmonic

From harmonic with the first syllable reversed, like cepstrum from spectrum.

(signal processing) A harmonic of a cepstrum.


gamnitude

From magnitude with the first syllable reversed, like cepstrum from spectrum.

(signal processing) A magnitude of a cepstrum.


multitapered

(signal processing) Employing the multitaper technique.


overfilter

It is clear that overfilters and underfilters are dual in the sense of the duality principle.

1999, Edward R. Dougherty, Jaakko Astola, Nonlinear Filters for Image Processing, page 180:

(signal processing) A morphological filter (idempotent operator) whose image is a superset of the domain.


underfilter

LL-Q1860 (eng)-Flame, not lame-underfilter.wav

(signal processing) A morphological filter (idempotent operator) whose image is a subset of the domain.


paraunitary

(signal processing) Of or relating to a kind of matrix that occurs in the construction of filter banks used in multirate digital systems.


alpha-beta filter

alpha-beta filter (plural alpha-beta filters)

(signal processing) An algorithm for data estimation and smoothing, closely related to Kalman filters, based on an approximation model with two internal states, the first state obtained by integrating the value of the second state over time.


misequalize

en-verb

misequalize (third-person singular simple present misequalizes, present participle misequalizing, simple past and past participle misequalized)

misequalizes (present singular third-person)
misequalizing (participle present)
misequalized (participle past)
misequalized (past)

At one time, U.S. Decca listed a large number of these performances, pressed on less than the best material, often misequalized, sometimes off pitch.

1979, Journal - Association for Recorded Sound Collections, page 124:

The most common symptom of incorrect equalization (assuming good associated equipment) is a bright, hard, elevated roughness of response above approximately 2 kHz. I think all of us have heard systems misequalized that way.

1981, The Absolute Sound - Volume 6, Issues 21-24, page 73:

If the recording is misequalized, overmiked , or poorly reverbed, the C/II will expose these faults.

1988, High Fidelity - Volume 38, Issue 2, page 28:

(transitive, signal processing) To equalize badly.


footroom

Coordinate term: headroom

[…] the difference between signal-to-noise ratio and overload reserve (headroom) as well as noise (safety) margin (footroom).

2000, Wolfgang Ahnert, Frank Steffen, Sound Reinforcement Engineering: Fundamentals and Practice, page 177:

To accommodate footroom, the number representation must allow negative numbers.

2012, Charles Poynton, Digital Video and HD: Algorithms and Interfaces, page 45:

Footroom – the range of code values in the blacks of an image that encompass the variations in grain or noise.

2017, Steve Wright, Digital Compositing for Film and Video:

(signal processing) Extra bandwidth for lower-than-expected values.


forward echo

en-noun

forward echo (countable and uncountable, plural forward echoes)


VQ

vector quantization
w:Vector quantization

(signal processing) Initialism of vector quantization.


fade time

fade time (countable and uncountable, plural fade times)

The annual fade time is three times that occurring in a heavy fading month when the climate is average.

2006, Roger L. Freeman, Radio System Design for Telecommunications, page 31:

The fractional fade time (also called the probability of fade) describes the percentage of time the irradiance of the received wave is below some given threshold value.

2014, Arun K. Majumdar, Advanced Free Space Optics (FSO): A Systems Approach:

The mean fade time decreases with increasing elevation and fade threshold.

2016, Murat Uysal, Carlo Capsoni, Zabih Ghassemlooy, Optical Wireless Communications: An Emerging Technology, page 95:

Figure 4.12 of [8] shows that on the same path from which the data in Fig. 4.11 of [8] was derived, for fade depth deeper than about 20 dB, the fade time decreases by a factor of about 10 for a 10 dB increase in fade depth.

2021, Douglas H Morais, 5G and Beyond Wireless Transport Technologies, page 62:

(signal processing) The time during which a wireless signal is too faint to be accurately received.


time-frequency analysis

electrical engineering
electrical engineering

time-frequency representation
time-frequency representation

(electrical engineering, signal processing) A technique that studies a signal in both the time and frequency domains simultaneously, using various time-frequency representations.


time-frequency representation

time-frequency representation (countable and uncountable, plural time-frequency representations)

(electrical engineering, signal processing) A view of a signal, taken to be a function of time, represented over both time and frequency.


time-domain averaging

(sciences, signal processing) A method for processing and analyzing signals, particularly when there is a requirement to reduce the impact of short-term fluctuations or noise.


data acquisition

(signal processing) The process of sampling signals that measure real-world physical conditions and converting the resulting samples into digital numeric values that can be manipulated by a computer.


time reversal signal processing

time reversal signal processing (uncountable)

(signal processing) A technique that either creates an optimal carrier signal for communication, reconstructs a source event, or focuses on high-energy waves to a point in space.