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Digital Video and HD
book

Digital Video and HD

by Charles Poynton
January 2003
Intermediate to advanced content levelIntermediate to advanced
736 pages
30h 54m
English
Morgan Kaufmann
Content preview from Digital Video and HD
Sampling NTSC at 4fs c gives 910 samples per total line
(STL). A count of 768 samples (3x28) encompasses the
active samples of a line, including the blanking transi-
tions. A count of 512 (29) lines is just slightly more than
the number of nonblanked lines in 480i scanning. The
numbers 768 and 512 were convenient for early
memory systems: 512 is the ninth power of 2, and 768
is 3 times the eighth power of 2. In the early days of
digital television, this combination - 768 and 512 -led
to very simple memory and addressing circuits for
framestores. The importance of this special combina- ...
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Publisher Resources

ISBN: 9781558607927