If we consider a very simple form of video installation , ie a system composed of computer, projector and surface, which does not interaction with the user, we can identify at least one thing a signal, a write and document, based on a Tractatus Philosophicus materialis .
The thing is date computer hardware, from its physical interfaces, the projector and the display surface.
The first, in particular, contains the ' digital video image, or a data file, a list of numbers.
The data is transmitted through the video signal through a physical interface such as a cable to the projector, which emits a beam of light of different colors, intercepted by a screen, producing an image.
The writing is given by a set of signs able to tell something: in this case, because we treat non-permanent signs, moving images, the narrative occurs in the space of the frame or frame (colors, images that you can assign a meaning, letters and symbols) and time of the video sequence .
The document can be represented by the movie as a whole, in context with the titles and credits (credits).
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