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Some countries have also introduced digital television and ended analog over-the-air transmissions. Most new TVs feature a digital tuner which allows reception of digital over-the-air TV without need of an external device such a converter box. If using a TV set without a digital tuner, an external converter box must be purchased and used.
In preparation for the end of analog services, all new television devices that receive signals over-the-air, including pocket-sized portable televisions, personal computer video capture card tuners, and DVD recorders, had been required to include digital ATSC tuners since March 1, 2007. [10]
As of June 12, 2009, TVs and other equipment with legacy NTSC tuners are unable to receive over-the-air broadcasts from United States TV stations, unless the broadcast is from a repeater or low-power transmitter. However, Class-A stations shut down analog transmissions on September 1, 2015 followed by a complete shutdown of all low-power and ...
QAM is used in a variety of communications systems such as Dial-up modems and WiFi. In cable systems, a QAM tuner is linked to the cable in a manner that is equivalent to an ATSC tuner which is required to receive over-the-air (OTA) digital channels broadcast by local television stations when attached to an antenna. Most new HDTV digital ...
A coupon-eligible converter box (CECB) was a digital television adapter that met eligibility specifications for subsidy "coupons" from the United States government.The subsidy program was enacted to provide terrestrial television viewers with an affordable way to continue receiving free digital terrestrial television services after the nation's television service transitioned to digital ...
In November 2017, the FCC approved ATSC 3.0 (Next Gen TV), an updated version of the ATSC standards that supports High Efficiency Video Coding (HEVC), video resolutions of up to 4K ultra high-definition (4K UHD), 120 Hz frame rate, high-dynamic-range (HDR) color, datacasting, and mobile television. Unlike the original digital transition, ATSC 3 ...
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