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Questions tagged [terminology]

For questions about words, phrases and definitions that are specific to signal processing.

139 questions
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What would be an example of something digital which isn't electronic?

The terms digital and electronic are often used interchangeably but I know that it's not correct because something can be digital but not electronic. Something can be digital in the sense that it's discrete both in time and magnitude. A picture of a…
somo
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Is non-digital necessarily analog?

If, simply put, digital is defined as anything we can count (with digits, or say, up to ten digits per etymological analysis), I would assume that anything that we can't and it's analog, but if so, why "analog" and not just "non-digital"?
yaraklis
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Verb for subtracting the mean?

Is there a verb for removing the mean or DC component of a signal? I am trying to name a flag for doing just that. "Normalize" can mean many things, so I don't think that would be a good choice.
Andreas
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Digital circuits are made of analog parts

I came across this here. Assuming that this is a true statement and not an experts' small joke, what makes circuits with digits (say with 0,1 bit machine codes) "analog"?
yaraklis
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Is there a name for $f(x) = |x|^n \cdot \operatorname{sgn}(x)$?

I'm looking for a name for the following function $$f(x) = |x|^n \cdot \operatorname{sgn}(x)$$ which is the exponent function, but with the sign stripped from the input and reattached to the output. It seems useful enough for DSP that it ought to…
Guest
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Up sampling vs down sampling,?

Refrence wikipedia article for upsampling and wikipedia article for downsampling Upsampling , interpolation and expansion are described as synonyms While Downsampling , decimation and compression are described as synonyms Are they mentioned…
DSP_CS
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Limiter, compressor, AGC, dynamics processor?

What are the primary differences between the usage or definitions of the terms “AGC”, “compressor”, “limiter”, and dynamics processor? They all seem to be forms of playing with gain knobs.
hotpaw2
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What do you call it when you add zeros between the elements of a vector?

What do you call it when you add zeros between the elements of a vector? let's say you have x =[1 2 3 4] and x_2 = [0 1 0 2 0 3 0 4] what do you call this process?
HappyBee
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Sinusoidal Wave Terminology

Suppose I have a sinusoidal signal of the form $x(t) = a\sin\left(2\pi b(t-c)\right) + d$. I understand $a$ is the amplitude, $b$ is the wave number, and $c$ is the phase shift. I know that the term $d$ shifts the entire signal vertically, but…
Paul
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What do Signal Processing experts do, in essence?

I want to understand what Signal Processing experts do in their professional work, in essence. I was thinking about: Sampling signals Receiving signals by machines Broadcasting signals by machines Creating mathematical models based on signals What…
Semo
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Are there two widely accepted meanings for digital?

Are there two widely accepted meanings for digital? Countable number of states (modes) such as on/off etc. Suitable for "things which aren't defined as signals" Discrete in both time and in value Suitable for "things which are defined as…
yaraklis
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What word can I use to describe time-varying spectral content?

I have two devices that generate different classes of signals, one simple and one complex. I would like to find a single word or short phrase that describes the increased richness in one class compared to the other. I'm wondering if such a word or…
Craig.Feied
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What is the technical term for the product of "number of pixels" and "number of channel per pixel"?

Assume I have m x n pixels of an RGB image. If I calculate 3mn, what is the name of quantity for this value?
Display Name
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Is there any opposite name for Decibel?

According to definition of decibel it’s “logarithmic unit of measurement used to express” So in audio we often convert linear value from range 0 to 1 to logarithmic scale for example like that: double result = 20.0 * log10(valueInRange_0_1); (of…
pajczur
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What does "warp" mean in DSP?

I hear the word warp a lot, but cannot quite get a feel for what it really means I suppose it's literal meaning would be to change in shape, but what does it mean with respect to DSP? More specifically, I have a DSP chip manual that says a certain…
user13267
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