Digital over-the-air TV
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In the United States, digital television broadcasts, or DTV, can be gotten via cable, via net, via satellite, or via free over-the-air (OTA) electronic terrestrial tv - much like analog television broadcasts have already been. Full-power analog television broadcasts, but had been required by U.S. national law to cease by June 12, 2009. Low-power, Class the, and television Translator channels aren't currently necessary to cease analog broadcasts. Also for legal reasons, digital broadcasts - when transmitted as OTA indicators - must comply with ATSC standards.; it's uncertain whether satellite providers tend to be liberated to make use of their own proprietary standards; and lots of standards occur for net tv (nearly all are proprietary).
The U.S. opted to stick to ATSC standards for broadcast electronic television. These requirements establish, among other things, format and transmission requirements that ensure consistency, ease of access, and fairness for customers and gear makers alike in U.S., as well as intercontinental compatibility.
The five primary ATSC formats of DTV currently transmitted in the U.S. tend to be:
Cable and satellite
At this time, many Americans have electronic television broadcasts via cable or satellite. Digital cable systems with a triggered channel capability of 750 MHz or greater, are expected because of the FCC to adhere to ANSI/SCTE transmission requirements except for cable methods that just go through 8 VSB modulated indicators. Digital tv sets (built with ATSC tuners) tend to be capable of seeing set up a baseline group of unencrypted digital development, called fundamental cable, which usually include regional network television affiliates. According to FCC laws, the remaining encrypted networks should be viewable with a receiver designed with a CableCARD.