THE
HISTORICAL BACKGROUND OF HDTV
Today, there
are over 1 billion television sets around the globe. 200 million of these
sets are estimated to be located in the United States. In order to transmit
analog television signals, countries around the world employ three different
systems: NTSC, PAL and SECAM.
-
NTSC: National
Television Systems Committee (525 vertical lines)
-
PAL: Phase
Alternation Line (625 vertical lines)
-
SECAM: Séquential
Couleur Avec Mèmoire (625 vertical lines)
But these systems
have several drawbacks. Firstly, they are incompatible with each other.
Secondly, international program exchange is not possible and thirdly, they
use limited bandwidth space. Hence, herelies the potential of creating
a new, digitalized international standard for all the countries in the
world. That new world standard is known as High Definition Television.
