This ratio is a measure of the content portion of the video signal in relation to the noise in the signal. As with audio, video signal-to-noise is measured in decibels (dB). Here's how the decibel scale works — if component A has a signal-to-noise (S/N) ratio of 20 dB and component B has a S/N ratio of 30 dB, component B will have ten times less noise in the signal than component A. Basically, a S/N ratio tells you how "clean" a video signal is. Because of the way they process signals, digital video formats like DVD are extremely clean. A standard VHS VCR may have a S/N spec in the low 40s, while DVD is rated to deliver a S/N ratio of 65 dB
The ratio of the amplitude or level of a desired signal at any point to the amplitude or level of noise at the same point.
The ratio of the wanted portion of a signal to the noise in the same signal. Usually expressed in dB
The ratio of the level of the information-bearing signal power to the level of the noise power. More precisely, the signal-to-noise ratio of the mean DN to the standard deviation in DN. This is a temporal noise definition in that the mean DN is the time averaged value and the standard deviation in DN is the standard deviation in the time series.
When used in reference to Usenet activity, signal-to-noise ratio describes the relation between amount of actual information in a discussion, compared to their quantity. More often than not, there's substantial activity in a newsgroup, but a very small number of those articles actually contain anything useful.
The ratio between useful television signal and unwanted interference
Ratio between the video or audio signal and the noise interference accompanying the signal.
Numerical value expressing in decibels the difference in level between an audio component's noise floor and some reference signal level.
Signal-to-noise ratio describes the proportion of signal (useful information or meaningful conversation in a many-to-many online medium) to noise (irrelevant chit-chat, banter or meaningless, non-productive posts). A high signal-to-noise ratio indicates that a particular site is rich in focused, relevant conversation.
The ratio of the signal power to the noise power at a point in a system (usually expressed in decibels).
The sensitivity of a communications receiver is generally specified in terms of the audio signal-to-noise ratio that results from an input signal of a certain number of microvolts.
The ratio expressed in decibels of the average signal power to the average noise power at a given point in a transmission path.
(SNR) the ratio of the signal power to the noise power in the data channel, measured in dB.
(Abbreviated SNR.) A ratio that measures the information content of a signal, usually defined as the ratio of the power of the signal unaffected by noise to the power of the noise. Commonly measured in decibels, the signal-to-noise ratio is sometimes defined for a specified bandwidth.
The ratio of maximum signal (recorded or processed) level to the residual noise (background noise caused by the electronic currents), expressed in dBs.
The ratio of the desired signal level or information, to the undesired signal or noise level in an electronic system.
Relative power of the signal information to the noise in a specified bandwidth, usually expressed in decibels (dB). [As the ratio decreases on a line, it becomes more difficult to distinguish between information and non-information (noise).
The ratio of received signal level to received noise level, expressed in dB. Abbreviated S/N. A higher S/N ratio indicates better channel performance.
A measure of the proportion of noise in video and audio signals. Measured in decibels (dB). The higher the signal-to-noise ratio, the higher quality the signal or recording. Over 100 is very clean, under 50 is very noisy
The ratio of pure signal to extraneous noise, such as tape hiss or video interference. Signal-to-noise ratio is measured in decibels (dB). Analog recordings almost always have noise. Digital recordings, when properly pre-filtered and not compressed, have no noise.
This is an expression of the mixture of music to noise. The less noise, the higher the number. A good signal-to-noise ratio specification for an amplifier is 100dB or higher.
The ratio of the power or volume (amplitude) of a signal to the amount of unwanted interference (the noise) that has mixed in with it. Measured in decibels, signal-to-noise ratio (SNR or S/N) measures the clarity of the signal in a circuit or a wired or wireless transmission channel.
The ratio of the magnitude of a signal to that of noise.
Expressed in decibels (dBs), this term describes a ratio or difference of wanted audible or visual information (signal) versus unwanted information experienced by distorted sounds and pictures (noise). Comparatively high decibel numbers mean better sound or visual images.
The level of the audio signal in relation to the level of unwanted background noise. Represented as a Decibel (dB) value, a larger the figure means less background noise and a clearer sound.
A measure of how quiet an audio device is when no signal is present. Also referred to as Hum and Noise or Residual Noise.
Describes the difference between the level of the audio signal and the level of unwanted noise. The larger the figure, measured in dB, the lower the noise will be.
(S/N, SNR) - The ratio between the amplitude of the received signal and background noise, which tends to obscure that signal. SNR, and hence image quality, can be improved by such factors as increasing the number of excitations, increasing the field of view, increasing slice thickness, etc. SNR also depends on the electrical properties of the patient being studied and the type of receiving coil used.
the ratio of signal intensity to noise intensity
Ratio of signal amplitude to noise amplitude. The ratio of overall rms signal level to rms noise level, expressed in dB. For sinusoidal signals, amplitude may be peak or rms.
Ratio of a desirable video signal to the amount of unwanted noise mixed in with it.
A measure of how much louder the signal (such as music) is, in comparison to the noise (such as hiss).
The magnitude of the signal divided by the noise interfering with the signal. The higher the Signal-to-Noise ratio, the better.
A ratio of signal power to noise power in a channel.
A ratio measuring the desired signal level to the level of unwanted image noise.
Usually written as SNR, this figure expresses the ratio of the maximum signal level to the residual noise level in dB.
A measure of the magnitude of a desired signal relative to the magnitude of an undesired signal or noise.
The amount of communication signal relating to the amount of interference, or noise, on the medium. Signal-to-noise is usually expressed in decibels.
rms of signal to rms of noise, expressed in decibels
The dimensionless ratio Eb/(No+Io), or bit energy divided by the noise-plus-interference energy accumulated over one bit period. Usually expressed in dB.
The relationship between the signal (sound) a person wishes to hear and the surrounding noise s/he does not want to hear.
Actually an index rather than a ratio, signal-to-noise refers to the difference between the meaningful sound one wants to hear in a particular situation (the signal) and any competing or distracting sounds (the noise). This difference is determined by measuring in decibels (dB) the intensity of the signal (a teacher's voice, the television, etc.) and the intensity of the background noise (passing automobiles, chatty neighbors, etc.), then subtracting the two measurements. In a typical classroom, for example, the teacher's normal speaking voice measures about 65dB, and the background noise is about 60dB. In this case, the signal-to-noise ratio would be only 5dB (65db - 60db = 5db). People with normal hearing usually require at least a 6dB signal-to-noise ratio to extract any meaningful information from the signal; people with hearing impairment generally need at least a 15dB signal-to-noise ratio.
the ratio of desired signal to undesired noise; often expressed in decibels, a logarithmic scale commonly used by engineers.
The ratio of power in a signal to the noise power in the channel. This term is usually applied to lower frequency signals, such as voice waveforms.
The difference in decibels between signal and noise levels.
The ratio of the level of the information-bearing signal power to the level of the noise power. For MODIS, the ratio between (1) typical cloud free scene brightness with solar zenith angle Z=70 deg, and (2) all sensor and processing noise contributions. S/N specifications for various scenes (e.g., land, clouds, oceans, ice) are only applicable in the filter bands associated with those scenes. Source: EPO.
The ratio of desired signal level to the undesired noise level, expressed in dB.
The ratio of the signal to noise level with both measured either at the input or output of electronic equipment, usually expressed in dB.
(S/N). An S/N ratio can be given for the luminance signal, chrominance signal and audio signal. The S/N ratio is the ratio of noise to actual total signal, and it shows how much higher the signal level is than the level of noise. It is expressed in decibels (dB), and the bigger the value is, the crisper and clearer the picture and sound will be during playback. An S/N ratio is calculated with the logarithm of the normal signal and the noise RMS value.
The amount of dB lower the noise is as compared to the signal.
A measurement indicating the quality of audio electronic circuits: a high signal-to-noise ratio is good. Measured in decibels.
A comparison of the signal level relative to the noise level. Larger numbers are better.
Difference in dB between the nominal operating level of a device (or "line level") and its internal noise. The s/n ratio can be also related to a whole signal chain.
The ratio in decibels (dB), of an audio or video signal, between the signal's maximum peak-to-peak signal voltage and the measured voltage of what remains when the signal is removed, (i.e., the ratio of the signal to that of the noise). In video, the higher the ratio, the less snow is visible. In audio, the higher the ratio, the cleaner the sound.
The ratio between the power level of the desired signal at the receiver and the power level of noise (undesired RF energy) at the receiver. It is expressed as the difference in decibels between the signal and the noise. Thus, a higher value means better reception.
The ratio of the recorded signal level to the tape noise level normally expressed in decibels. Commonly abbreviated as S/N.
ratio of signal variance to noise variance, computed for a given band limit.
An amplitude measurement; the ratio of system noise to the maximum information level within a given signal, usually expressed in dB
In analog video systems, the ratio between the peak-to-peak black-to-white signal and the rms value of any superimposed noise. IN analog audio systems, S/N refers to the ratio of rms signal to rms noise.
The amount of useful information to be found in a given Usenet newsgroup. Often used derogatorily, for example: "the signal-to-noise ratio in this newsgroup is pretty low."
The ratio of the desired signal level to the level of unwanted noise. Measured in decibels. Signal-to-Noise Ratio 10.0 dB 20.0 dB 30.0 dB 40.0 dB 50.0 dB 60.0 dB 70.0 dB 80.0 dB Times Signal is Greater than Noise 3.16 10.00 31.62 100.00 316.20 1,000.00 3,162.00 10,000.00
An electronics term used to compare the amount of good, useful info ("signal") in a newsgroup with the amount of bad, useless junk ("noise"). Newsgroups that have lots of flame wars and spam have a low signal-to-noise ratio.
a measurement of the quality of a spectrum, often employed to determine the quality of the spectrometer; the ratio of the signal, measured as a ratio the intensity of an absorbance band, to the RMS of the spectrum due to noise measured at a nearby point in the baseline.
ratio between the value that is being measured and interference from background occurrences
(S/N ratio) Often arbitrarily assigned, the S/N ratio should be the difference, in dB, between the noise floor of a playback component or sound recording and the loudest level it can achieve with inaudible distortion. The measurement is sometimes weighted as to audibility, because the ear is more sensitive to some frequencies than others. The most generous scale is dBA (A-weighted). In any case, the larger the S/N number, the better. See also dB; Noise floor.
A measure of the strength of the audio signal in comparison to that of the background noise. Essentially, a low signal-to-noise ratio means that the device or file has lots of hiss and static, while a high rating means clear-sounding audio.
Proportion of true signal information to extraneous noise or interference that an audio or video unit delivers.
SNR is the ratio of the amplitude of the desired signal to the amplitude of the noise signals at a given point in time. For a waveform perfectly reconstructed from digital samples, the theoretical maximum SNR is the ratio of the full-scale analog input (RMS value) to the RMS quantization error (residual error).The ideal, theoretical minimum ADC noise is caused by quantization error only and results directly from the ADC's resolution (N bits): (Actual ADCs produce thermal noise, reference noise, clock jitter, etc., in addition to quantization noise.)
A measure of the power of a signal versus noise. A lower ratio means there is more noise relative to signal.
A measure of the light signal reaching the eye divided by the perceived noise as seen by the eye. A tubeâ€(tm)s SNR determines the low-light-resolution of the image tube; therefore, the higher the SNR, the better the ability of the tube to resolve objects with good contrast under low-light conditions. Because SNR is directly related to the photocathodeâ€(tm)s sensitivity and also accounts for phosphor efficiency and MCP operating voltage, it is the best single indicator of an image intensifierâ€(tm)s performance.
The relationship between the intensity of the desired sound (signal) and other undesired sounds (noise). The louder the speech signal is presented in comparison to the background noises, the better chance a person has at understanding the speech signal.
Ratio of desired signal to unwanted noise. A high signal-to-noise ratio is highly desired. Difference of 45 dB is required for clear reception.
The range or distance between the noise floor (the noise level of the equipment itself) and the music signal.
The dimensionless ratio Eb/(N0+I0), or energy per bit divided by the noise-plus-interference power spectral density. It is usually stated in dB.
a ratio (in decibels) that expresses the difference between the level of a signal at a reference point in a circuit and the level of electrical noise at the same point.
The ratio between the audio signal and noise floor. A low number indicates that the noise and music are closer together--the higher the number, the less noise is apparent.
The measure of the musical signal relative to background noise. The higher the S/N ratio, the cleaner the sound.
The ratio of signal to noise, measured in decibels. An indication of the signal quality in an analog system.
"Signal" refers to the useful or "pure" information found in a an audio stream or other medium, and "noise" to anything else. The ratio of these is usually expressed logarithmically, in decibels. Signal-to-Noise Ratio is sometimes abbreviated as SNR, s/n ratio and s:n ratio. A high SNR translates to a "cleaner" signal.
The ratio of the usable signal to unusable noise in any signal. In imaging, this represents the quality of the scan.
The ratio between useful television signal and disturbing noise or snow.
The ratio between a useful video signal and unwanted noise.
The ratio between the television signal and the noise; expressed in decibel(dB). The higher the number the better.
The ratio of signal-to-background level. The higher its value the greater the confidence in the accuracy of the experimental results.
The measure of the signal quality at a given pixel. It is the ratio of the measured signal to the overall noise at that pixel.
A measure of how well a cassette deck silences background noise. A higher rating — in decibels (dB) — indicates less noise.
The comparison between the amplitude of the seismic signal and the amplitude of noise caused by seismic unrest and (or) the seismic instruments.
Ratio between a reference output level and the background noise of an amplifier circuit or storage media.
The signal-to-noise ratio is the ratio of the background noise (hiss, hum and static) level to the highest level that can be reproduced.
A measure of link performance arrived at by dividing signal power by noise power. Typically measured in decibels. The higher the ratio, the clearer the connection.
a ratio between the recordable signal and the equipment's inherent electronic noise. The higher the figure the better.
The ratio of the maximum value of an output signal to the standard deviation amplitude of the noise on the signal.
The phrase signal-to-noise ratio, often abbreviated SNR or S/N, is an engineering term for the ratio between the maximum possible signal (meaningful information) and the background noise. Because many signals have a very wide dynamic range, SNRs are often expressed in terms of the logarithmic decibel scale.
Comparison of signal power to noise power, including dark current and other unwanted/unpredictable fluctuations. SNR is expressed in decibel values for analog systems, and "bit" values for digital systems. Industrial CCD cameras have no less than 46dB SNR, yielding 256 steps of contrast in the image. This corresponds to an 8 bit digital signal (28 = 256). Every 6dB of an analog signal converts to 1 bit when digitized.
the ratio of the desired signal's volume to the unwanted noise, usually measured in dB. Manufacturers measure this ratio in many different ways, but basically the higher the number, the better and cleaner the signal
(SNR): The ratio of the total signal to the total noise which shows how much higher the signal level is than the level of the noise. A measure of signal quality.
The ratio of the received optical power, with fill signal averaging, divided by the noise floor for the detector; the ratio of signal level to noise level, related to bit error rate performance.
Signal-to-noise ratio (often abbreviated SNR or S/N) is an electrical engineering concept defined as the ratio of a signal power to the noise power corrupting the signal.