line noise

[′līn ‚nȯiz]

(communications)

Noise originating in a transmission line from such causes as poor joints and inductive interference from power lines.

line noise

(communications)

1. Spurious characters due to electrical noise in a communications link, especially an EIA-232 serial connection. Line noise may be induced by poor connections, interference or crosstalk from other circuits, electrical storms, cosmic rays, or (notionally) birds crapping on the phone wires.

2. Any chunk of data in a file or elsewhere that looks like the results of electrical line noise.

3. Text that is theoretically a readable text or program source but employs syntax so bizarre that it looks like line noise. Yes, there are languages this ugly. The canonical example is TECO, whose input syntax is often said to be indistinguishable from line noise. Other non-WYSIWYG editors, such as Multics "qed" and Unix "ed", in the hands of a real hacker, also qualify easily, as do deliberately obfuscated languages such as INTERCAL.

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

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References in periodicals archive

2) Power line noise: The noise generated from the power system is the major cause of noise in the process of monitoring ECG signals (also known as power line interference) [17].

Designing Non contact based ECG System for Driver Drowsiness Detection

However, the pilot signal is affected due to channel transmission characteristics of the power line and the power line noise. Figure 6 shows the estimation model in the pilot point.

The Channel Compressive Sensing Estimation for Power Line Based on OMP Algorithm

* Filtering using temporal filter: Mostly, the first step for EEG signal processing is a filtering process to eliminate subguassian interference (line noise), DC and reduce superguassian artifacts (eye blinks).

Temporal predictability based blind source separation--an approach for denoising Eeg signal

Five types of noise sources contribute to the acquired EMG signal: thermal noise of electronics in the recording equipment, power line noise, ambient noise of electromagnetic radiation, motion artefacts from electrode-skin interface or the cable connecting the electrode to the recording equipment, the electro-chemical (baseline) noise originating at skin-electrode interface [7], and inherent instability of the EMG signal due to the quasi-random nature of the firing rate of the muscular motor units [8].

BoostEMD: an extension of EMD method and its application for denoising of EMG signals

Although they take exquisite daylight images, many produce "banding" and line noise that show up in low-light conditions.

Eliminating band & line noise: here's a technique that removes common artefacts from DSLR and CCD images

FPGAs have also been used in many applications such as wireless sensors network (WSN) [23], pulse oximeter [24], adaptive filters reducing power line noise in ECG measurement system [25], and EMG measurement power line noise cancellation [26].

Performance evaluation of heart sound cancellation in FPGA hardware implementation for electronic stethoscope

Their results showed reduction in the power line noise in the ECG signal using the proposed filter that has fewer coefficients and hence lesser computation time for real time processing.

Performance comparison of wavelet and multiwavelet denoising methods for an electrocardiogram signal