
I ntrod u cti o n to
video compression
14
Directly storing or transmitting Y'CBC R digital video
requires immense data capacity- about 20 megabytes
per second for SDTV, or about 120 megabytes per
second for H DTV. First-generation
studio
digital VTRs,
and today's highest-quality studio VTRs, store uncom-
pressed video; however, economical storage or trans-
mission requires compression. This chapter introduces
the JPEG, M-JPEG, and MPEG compression techniques.
Data compression
Data compression
reduces the number of bits required
w ~w,~ or convey text, numeric, binary, image, sound,
or other data, by exploiting ...