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8 Glossary
A
Aspect ratio
Aspect ratio refers to the length to height ratio of TV screens. The
ratio of a standard TV is 4:3, while the ratio of a high-denition or
wide TV is 16:9. The letter box allows you to enjoy a picture with a
wider perspective on a standard 4:3 screen.
D
DivX®
The DivX® codec is a patent-pending, MPEG-4 based video
compression technology developed by DivX®, Inc. It can shrink the
le size of digital video and still maintain the high visual quality.
J
JPEG
A very common digital still picture format. A still-picture data
compression system proposed by the Joint Photographic Expert
Group, which features small decrease in image quality in spite of its
high compression ratio. Files are recognized by their le extension
‘.jpg’ or ‘.jpeg.’