Progressive scanning, which is the format used in computers, scans lines in sequences, from top to bottom.
This outcome resulted from a dispute between the consumer electronics industry (joined by some broadcasters) and the computer industry (joined by the film industry and some public interest groups) over which of the two scanning processes—interlaced or progressive—is superior.
Interlaced scanning, which is used in televisions worldwide, scans even-numbered lines first, then odd-numbered ones.
Below are the different widely used digital television broadcasting standards (DTB): In the mid-1980s as Japanese consumer electronics firms forged ahead with the development of HDTV technology, and as the MUSE analog format proposed by NHK, a Japanese company, was seen as a pacesetter that threatened to eclipse U. Then, an American company, General Instrument, demonstrated the feasibility of a digital television signal.
This breakthrough was of such significance that the FCC was persuaded to delay its decision on an ATV standard until a digitally based standard could be developed.
Although incompatible with the existing NTSC standard, the new DTV standard would be able to incorporate many improvements.