The standard
for broadcasting analog television in most of North America is NTSC. The
standards for video in other parts of the world are PAL and SECAM. Note that
NTSC, PAL and SECAM will all be replaced over the next ten years with a new
suite of standards associated with digital television.
International
organizations that contribute to standardizing digital television include:
■ Advanced
Television Systems Committee (ATSC)
■ Digital
Video Broadcasting (DVB)
The Advanced
Television Systems Committee was formed to establish a set of technical
standards for broadcasting television signals in the United States. ATSC
digital TV standards include high-definition television, standard definition
television, and satellite direct-to-home broadcasting.
ATSC has
been formally adopted in the United States where an aggressive implementation
of digital TV has already begun. Additionally, Canada, South Korea, Taiwan, and
Argentina have agreed to use the formats and transmission methods recommended
by the group.
DVB is a
consortium of about 300 companies in the fields of broadcasting, manufacturing,
network operation and regulatory matters. They have established common
international standards for the move from analog to digital broadcasting.
DVB has
produced a comprehensive list of standards and specifications that describe
solutions for implementing digital television in areas such as transmission, interfacing,
security, and interactivity for audio, video, and data.
Because DVB
standards are open, all compliant manufacturers can guarantee that their
digital TV equipment will work with other manufacturers’ equipment.
There are
numerous broadcast services around the world using DVB standards and hundreds
of manufacturers offering DVB compliant equipment.
While the
DVB has had its greatest success in Europe, the standard also has implementations
in North and South America, China, Africa, Asia, and Australia.
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