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 noise power, often expressed in decibels. A ratio higher than 1:1 (greater than 0 dB) indicates more signal than noise.

信噪比 （英語： Signal-to-noise ratio，缩写为 SNR 或 S/N），又稱 訊雜比[1] 或 訊噪比，是科学和工程中所用的一种度量，用於比較所需 訊號 的强度與背景雜訊的强度。 其定義為訊號功率与雜訊功率的比率，以 分貝 （dB）为单位表示。 大於比率1:1（高於0分貝）表示訊號多於雜訊。 信噪比通常用於描述電子訊號，也可以應用在各種形式的訊號，比如 冰芯 （英语：Ice core） 內的同位素量，或細胞間的 生物化學信號 [來源請求] 所指為有用信号 功率 （Power of Signal）与 雜 …

2025年1月16日 · 信噪比 （Signal-to-Noise Ratio，SNR）是衡量信号质量的重要参数，表示有用信号的功率与背景噪声功率的比值。 SNR在通信、音频处理、视频处理以及其他电子信号处理领域中具有广泛的应用。 1. 基本概念. SNR 定义为信号功率与噪声功率之比，通常用分贝（dB）表示。 其公式为： 其中， Psignal P signal 表示信号功率， Pnoise P noise 表示噪声功率。 用分贝表示时，公式为： 高SNR值意味着 信号质量 好，噪声对信号的干扰小；低SNR值则表明信号中 …

SNR stands for Signal to Noise Ratio. It is a ratio and as such does not have any units, it describes the proportion of signal to undesired noise. There is no single correct measure of SNR, it differs depending on the application. In the equation you have given, the SNR is broken down in the following way: 1) Calculate the power ratio

2024年7月9日 · 信噪比(SNR or S/N)，即放大器的输出信号的功率，与同时输出的噪声功率的比值，常常用分贝数表示。设备的信噪比越高表明它产生的杂音越少。

2024年12月12日 · 信噪比（Signal-to-Noise Ratio, SNR）是衡量信号质量的一个重要指标。 它表示信号功率与噪声功率的比值，通常以分贝（dB）为单位表示。 信噪比越高，信号质量越好。

2024年7月17日 · In terms of definition, SNR or signal-to-noise ratio is the ratio between the desired information or the power of a signal and the undesired signal or the power of the background noise. Also, SNR is a measurement parameter in use in the fields of science and engineering that compares the level of the desired signal to the level of background noise.

In analog and digital communications, a signal-to-noise ratio, often written S/N or SNR, is a measure of the strength of the desired signal relative to background noise (undesired signal). S/N can be determined by using a fixed formula that compares the two levels and returns the ratio, which shows whether the noise level is impacting the ...

2024年7月6日 · The SNR represents the ratio between the signal and the background noise. If we have a high SNR, it means that the strength of our signal is significantly greater than the noise. When we’re discussing the SNR in data communication, a high SNR will indicate that we’re successfully transmitting information.

A high SNR unit has a signal which is greater in amplitude than the background noise and is likely to correspond to a neuron [Jackson], [Lemon]. A low SNR value (close to 0) suggests that the unit is highly contaminated by noise (type I error).