
MPEG-2 video compression 40
I assume that you are familiar with
Introduction to video compression,
on page 117, and with J PEG,
M-JPEG, and DV, described in the
preceding two chapters.
The DCT-based intrafield or intraframe compression at
the heart of M-JPEG is suitable for video production;
however, for distribution, dramatically higher compres-
sion ratios can be obtained by using interframe coding.
MPEG-2 video compression exploits temporal coher-
ence- the statistical likelihood that successive pictures
in a video sequence are very similar. MPEG-2's intended
application ranges from below SDTV to