JPEG,MPEG
JPEG is a lossy image compression format. What this means is that in all
commercial JPEG implmentations there is some loss of color in the image when
it is compressed to be stored as JPEG. This color loss allows the image to
to reach much higher compression levels. The color loss starts with colors
the human eye does not perceive well, so with a higher quality setting you
will rarely notice the change. JPEG was designed for photorealistic images
and is not as good for line art images.
MPEG was designed for video. It is usually limited to lower resolution images
and achieves its compression using methods similar to JPEG (but faster versions
so full motion is possible) and also incorporates compression methods based on
similarities to frames before and after the current frame. MPEG also includes
standards for incorporating sound into an MPEG file.
Hope this helps!
Kermit Woodall
Nova Design, Inc.