Attempts where made during the development of digital television to prevent a repeat of the fragmentation of the global market into different standards (i.e. PAL, SECAM, NTSC). However, the world could not agree on a single standard (why?), and hence there are two major standards in existence, the European system, DVB, and the U.S. system, ATSC. (Doesn't Japan have its own system as well?). Most countries in the world have adopted DVB, but several have followed the U.S. in adopting ATSC instead (Canada, South Korea, Argentina and Taiwan). (See http://www.dvb.org/dvb_technology/worldadoption.html for a map, although the map is biased towards DVB.) Is the below talking about all DTV systems, or just ATSC, or what?
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