
Digital television
broadcast standards
50
In this chapter I will briefly summarize the standards for
digital television broadcasting. All digital broadcast
systems that have been standardized are based upon
AAPEG-2 compression, described in
IkIPEG-2 video
compression
on page 473.
H DTV transmission systems were conceived to deliver
images of about twice the vertical and twice the hori-
zontal resolution of SDTV- that is, about
2 megapixels -in a 6 AAHz analog channel. AAPEG-2 can
compress 2 megapixel images at 30 frames per second
to about 20 AAb/s. Modern digital modulation schemes
suitable for ...