Causes of noise in captured analog video

[snowman7071]

Hi,

I've read many posts on applying filters to remove noise from captured analog video. In a nutshell, what is the source of the noise? I assume it's noise caused by the capturing process and not actual noise in the video source (or else better-than-source results would be more viable). Also, do you know of a good source for the theory of different types of noise and noise reduction and video stablization techniques.

Thanks

[Dave B]

Analog video noise can be caused by pretty much anything and can occur at any step of the process. Some of the most common reasons for noise is electromagnetic interference from other machines, long insufficiently shielded cable runs and poor quality connectors. Video noise can of course also be generated by the capture process.

Noise can occur in both the temporal and spatial domain. Virtualdub has a number of popular filters that can be configured to clean or smooth the noise in the video.

Further information about video noise can be found in any good analog video book or on a number of reference sites on the internet. A Google search for temporal, spatial, video noise should uncover a wealth of information.

[snowman7071]

Thanks for that.