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Qu'est-ce (qui) est signal to noise ratio - définition
MEASURE COMPARING THE LEVEL OF A SEARCHED SIGNAL TO THE LEVEL OF BACKGROUND NOISE
Signal level; Signal to noise ratio; Signal to Noise ratio; Signal-To-Noise Ratio; Signal to noise; Signal to noise level; S/N ratio; Desired-to-undesired ratio; Signal-to-noise; Optical signal-to-noise ratio; Signal-noise ratio; S/n ratio; Signal-to-noise-ratio; Signal:noise; Signal-to-Noise; Signal/noise ratio; Signal to noise ratio (image processing); Signal-to-noise ratio (image processing); Signal to Noise Ratio; Signal-to-Noise Ratio
Signal-to-noise ratio
Signal-to-noise ratio (SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. SNR is defined as the ratio of signal power to the noise power, often expressed in decibels.
signal-to-noise ratio
¦ noun the ratio of the strength of an electrical or other signal carrying information to that of unwanted interference, generally expressed in decibels.
signal-to-noise ratio
1. <communications> (SNR, "s/n ratio", "s:n ratio") "Signal"
refers to useful information conveyed by some communications
medium, and "noise" to anything else on that medium. The
ratio of these is usually expressed logarithmically, in
decibels.
2. <networking> The term is often applied to Usenet
newsgroups though figures are never given. Here it is quite
common to have more noise (inappropriate postings which
contribute nothing) than signal (relevant, useful or
interesting postings). The signal gets lost in the noise
when it becomes too much effort to try to find interesting
articles among all the crud. Posting "noise" is probably the
worst breach of netiquette and is a waste of bandwidth.
[Jargon File ]
(1996-01-29)
Wikipédia
Signal-to-noise ratio
Signal-to-noise ratio (SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. SNR is defined as the ratio of signal power to the noise power, often expressed in decibels. A ratio higher than 1:1 (greater than 0 dB) indicates more signal than noise.
SNR, bandwidth, and channel capacity of a communication channel are connected by the Shannon–Hartley theorem.
