Gaussian noise


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Gaussian noise

[¦gau̇·sē·ən ′nȯiz]
(communications)
Noise that has a frequency distribution which follows the Gaussian curve.
(mathematics)

Gaussian noise

(1) In communications, a random interference generated by the movement of electricity in the line. It is similar to white noise, but confined to a narrower range of frequencies. You can actually see and hear Gaussian noise when you tune your TV to a channel that is not operating. Contrast with white noise and pink noise. See Gaussian distribution and Gaussian blur.

(2) A random distribution of artifacts in analog video images that makes everything look soft and slightly blurry. On close inspection, one can see tiny specks in random patterns. Found on films shot with older cameras as well as films and videotapes that have been archived for a long time, dynamic noise reduction (DNR) circuits can eliminate much of the Gaussian noise when the analog material is converted to digital. See dynamic noise reduction.
References in periodicals archive ?
The test image is 256[x.sub.2]56 pixels gray levels image that was distorted by convolution with a Gaussian PSF and additive white Gaussian noise. The differences consist in the fact that the authors use as metric the root mean square error (rms) instead of PSNR and characterize the PSF by Full Width of Half Maximum (FWHM) instead of standard deviation [[sigma].sub.ker].
In this communication channel the interference and Gaussian noise will be added with the pre coding signal.
Pavement condition [c.sub.1] [c.sub.2] [c.sub.3] Dry asphalt 1.2801 23.99 0.52 Wet asphalt 0.8570 33.822 0.347 Dry cement 1.1973 25.168 0.5373 Dry cobblestone 1.3713 6.4565 0.6691 Wet cobblestone 0.4004 33.7080 0.1204 Snow 0.1946 94.129 0.0646 Ice 0.05 306.39 0.001 TABLE 2: Effect of the standard deviation of Gaussian noise on classification accuracy (OA%).
Where F(n) is used as a white Gaussian noise with zero-mean and unity variance independent with the plant internal noise.
Moreover, we consider the GLE is driven by a fractional Gaussian noise and a Mittag-Leffler noise, respectively, in this paper.
Caption: Figure 7: PSNR (dB) graph of [13, 18, 19] and new algorithms for various Gaussian noise for Miss America video sequence.
To analyze the decomposition effect of white Gaussian noise, the noise-only IMF energies can be described as follows [12]:
where subscript m denotes the signals corresponding to path m = 1, 2, ..., M and [[xi].sub.k] is kth chip of complex additive white Gaussian noise with power spectral density equal to [N.sub.0].
As shown in Table 3, our method outperforms BLF in denoising the vessel parts of the images, whether Gaussian noise or salt-and-pepper noise is added.
Jerew, "Design and implementation of a chaotic scheme in additive white Gaussian noise channel," Journal of Computer Networks and Communications, vol.
In this examples, additive white Gaussian noise (AWGN) is added to the measured voltages, and is quantified by [mathematical expression not reproducible], where [parallel]*[parallel] denotes Frobenius norm.

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