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The fast Fourier transform is an efficient algorithm to compute the discrete Fourier transform (DFT) and its inverse.
3295 questions
In general, image processing is any form of signal processing for which the input is an image, such as a photograph or video frame.
3225 questions
MATLAB (MATrix LABoratory) is a numerical computing environment and a fourth-generation programming language. Use this tag with care.. see excerpt.
3155 questions
In signal processing, a filter is a device or process that transforms a signal by selectively choosing specific frequencies and leaving others with appropriate gain or as it is.
2999 questions
A discrete signal or discrete-time signal is a time series consisting of a sequence of quantities.
2611 questions
The processing of signals for the purpose of extracting a parameter or property embedded in a signal. Signal goes in and far fewer numbers come out.
2356 questions
The Fourier transform is a mathematical operation that decomposes a function into its constituent frequencies, known as a frequency spectrum.
2331 questions
Audio, or in terms of signal processing, an audio signal is an analog or digital representation of sound, typically as an electrical voltage.
1654 questions
Digital Communication is the physical transfer of data (a digital bit stream) over a point-to-point or point-to-multipoint communication channel.
1620 questions
The frequency spectrum of a time-domain signal is a representation of that signal in the frequency domain.
1417 questions
Python is a high-level interpreted general programming language. Python has popular numerical and scientific libraries/packages, most notably numpy and scipy. The scipy.signal package is a powerful …
1375 questions
In signal processing noise can be considered random unwanted data without meaning.
1301 questions
The Discrete Fourier Transform (DFT) is a mapping between a finite set of discrete points in a (primal) domain (time, space) and the dual frequency domain. DFT requires an input sequence which is di…
1184 questions
In signal processing, sampling is the reduction of a continuous-domain signal to a discrete-domain signal.
1172 questions
Convolution is a mathematical operation on two functions f and g, producing a third function that is typically viewed as a modified version of one of the original functions.
1063 questions
The Power Spectral Density (PSD) is the distribution of signal power over frequencies.
901 questions
Computer vision includes methods of processing, analyzing, images and high-dimensional data to form high level understanding and recognition of the scene or images.
850 questions
A continuous signal or a continuous-time signal is a varying quantity (a signal) whose domain, which is often time, is a continuum.
849 questions
A finite impulse response (FIR) filter is a type of a signal processing filter whose impulse response is of finite duration.
782 questions
Frequency in signal processing is the number of cycles (of the signal) per second.
779 questions
A low-pass filter is an electronic filter that passes low-frequency signals but attenuates signals with frequencies higher than the cutoff frequency.
732 questions
A linear system operates on inputs with only linear operators so the response to a complex input can be analysed as the sum of the response to a set of simpler inputs. This mathematical property makes…
731 questions
A quantity representing the fraction of cycle of a periodic signal, usually represented as an angle.
711 questions
Modulation is the process of varying one or more properties of a high-frequency periodic waveform, called the carrier signal, with the amplitude of low-frequence modulating signal which typically cont…
654 questions
A wavelet is a wave-like oscillation with an amplitude that starts out at zero, increases, and then decreases back to zero.
653 questions
578 questions
Infinite impulse response (IIR) is a property of signal processing systems.
568 questions
The Z-transform converts a discrete time-domain signal, which is a sequence of real or complex numbers, into a complex frequency-domain representation.
561 questions
Transfer function is a mathematical representation of relationship between input and output (signal) of a linear, time-invariant system.
545 questions
Frequency response is the quantitative measure of the output spectrum of a system or device in response to a stimulus, and is used to characterize the dynamics of the system.
519 questions
Autocorrelation is the cross-correlation of a signal with itself.
500 questions
The impulse response of a dynamic system is its output when presented with a brief input signal, called an impulse.
490 questions
464 questions
In signal processing, estimation is a technique for approximating an unobserved signal from an observed signal containing noise.
456 questions
The Kalman filter is 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…
453 questions