Complex sentence: Two common videographic aspect ratios are 4:3 (1.3:1), and the universal video format of the 20th century; 16:9 (1.7:1), universal for high-definition television and European digital television.
Split into simpler sentences: Two common videographic aspect ratios are 4:3 (1.3:1). The universal video format of the 20th century is 16:9 (1.7:1), universal for high-definition television and European digital television.