In television post-production, ‘arcing’ typically involves cropping, ‘letterboxing’, or stretching the picture to accommodate different screen formats. Each process has advantages and disadvantages. For example, when arcing 4:3 images for a 16:9 screen: cropping allows the image to fill the screen but twenty-five percent of the original picture is lost; masking preserves the original image but the areas at the top and bottom of the screen are left blank; stretching makes use of the entire screen and preserves the picture but distorts the image. See also aspect ratio; letterbox format; pan and scan; pillarbox format.
http://www.pjdaniel.org.uk/afd/ Digital widescreen TV
Subjects: Media Studies.