Format four thirds

The four thirds - 4/3 - (either a report/ratio of 1,33:1 between width and height of the screen) corresponds to the first format of projection used in the Cinéma. One speaks sometimes about “standard” format.

At the beginning, the fictions with the Télévision were also turned strips about it (before the video), it is thus logically the format which was adopted for television, and then for the screens of computer (definition of 640×480, 1024x768 or 1280×960 for example).

In the Years 1950, the cinema had recourse to the technical innovation to counterbalance the arrival of television and to preserve market shares. Formats known as “broad” were thus developed, i.e. with a more important width report/ratio on height (most current being 1,66:1, 1,85:1 and 2,35:1). The representation of these works on television 4/3 implied either to put black bands in top and bottom (the process Letterbox), or to cut the edges left and right of the image (technique of the Pan and Scan).

Another format of screen thus developed, the 16/9, in order to reduce the black bands or the portion of cut image. In addition, certain screens use other reports/ratios, dimensions known as “hybrid”, like the first screens of Apple Macintosh (longitudinally like a sheet of paper) or the 1280×1024 used in the screens with liquid crystals)

Comparison

See too

Category: Film standard

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