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Aspect ratio
The aspect ratio of a television program describes the dimensions of the video. It is the ratio of the width to the height.
4:3 ("full screen")[edit]
Arthur was originally produced in 4:3 aspect ratio, yielding a "full screen" video image, from Season 1 through Season 11. When viewed on a modern widescreen television set or computer monitor, there are black vertical bars on the left and right sides of the video. Some broadcasters may choose to stretch the video to fill any void, or a viewer can manually adjust their television settings to eliminate blank space on screen. In any case, some degree of distortion of the original video will result.
16:9 (widescreen)[edit]
Beginning with Season 12, Arthur was produced in 16:9 aspect ratio. However, releases of Seasons 12 through 15 were cropped to 4:3 in the United States, including broadcasts from PBS and official releases on streaming services, like Amazon Prime Video. Elsewhere, episodes from Season 12 through 15 were broadcast in widescreen format internationally. The show was broadcast in all regions in 16:9 with the introduction of Season 16.
