Topic summary
Analog video
Extracted from the Wikipedia article Video.
Analog video
Video developed from facsimile systems developed in the mid-19th century. Mechanical video scanners, such as the Nipkow disk, were patented as early as 1884, but it took several decades before practical video systems could be developed. Whereas the medium of film records using a sequence of miniature photographic images visible to the naked eye, video encodes images electronically, turning them into analog or digital electronic signals for transmission and recording.