To protect your security on your premise, you wouldn’t want too much unwanted noise in the background of your footage. You will want a CCTV with a noise reduction feature to reduce the noise. CCTV is just like other recording equipment. They gather the data from the environment around them. They are not invulnerable to noise in the background. As the CCTV captures the picture around them, the data may have errors and may be corrupted because of the noise. The data may also be overridden.