Fullscreen (aspect ratio)

In contrast, other aspect ratios can be converted to full screen using techniques such as pan and scan, open matte or reframing.

In pan and scan, the 4:3 image is extracted from within the original frame by cropping the sides of the film.

In open matte, the 4:3 image is extracted from parts of the original negative which were shot but not intended to be used for the theatrical release.

[2][3] Full-screen aspect ratios in standard television have been in use since the invention of moving picture cameras.

When cinema attendance dropped, Hollywood created widescreen aspect ratios (such as 1.85:1) in order to differentiate the film industry from TV.