SNR Signal to Noise Ratio



SNR Signal to Noise Ratio is the ratio between a useful video signal and unwanted noise. The higher the SNR the better the picture and the lower the amount of interfering image noise.

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SNR dBSNR:1Picture Quality
60dB1,000Excellent, no noise apparent
50dB316Good, a small amount of noise but picture quality good
40dB100Reasonable, fine grain or snow in the picture, some fine detail lost
30dB32Poor picture with a great deal of noise
20dB10Unusable picture

Again the higher the dB number the better the picture. Meaning it has less noise. Noise can be manifest in graininess, streaks, etc. WDR cameras are at least 95dB typical and up to 120dB maximum. This is found in cameras powered by Pixim's digital image sensor.

Also see CCD, CMOS and WDR.

Click here to learn more about Pixim Digital Technology

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