Widescreen

Widescreen is all wider than 1.333∞ (equals 4:3).

1.333∞ (equals 4:3) is the Standard Definition standard width since the 20th century A.D.

1.777∞ (equals 16:9) is the High Definition/Ultra High Definition standard width since the 21st century A.D.

In the case of the image on the right side:

• 16 units wide and 12 units tall (equals 4:3) with the bars.

• 16 units wide and 9 units tall (equals 16:9) without the bars .