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2. Digital television in the United States - Wikipedia

   en.wikipedia.org/wiki/Digital_television_in_the...

   High definition—1080p (only used by a few cable operators and some terrestrial stations broadcast in 1080p) Most digital television sets sold in the U.S. use a display with a 16:9 aspect ratio to optimally display HDTV-formatted content. Lower-resolution sources like regular DVDs may be upscaled to the native resolution of the TV.

3. Cable-ready - Wikipedia

   en.wikipedia.org/wiki/Cable-ready

   Digital cable-ready or DCR is a label used by manufacturers on new televisions which feature built-in technology that allows consumers to receive SDTV and HDTV digital cable programs. [4] Usually this is a QAM tuner , since over-the-air broadcasts are either COFDM ( DVB-T and ISDB-T ) or 8VSB ( ATSC -T).

4. High-definition television in the United States - Wikipedia

   en.wikipedia.org/wiki/High-definition_television...

   A separate tuner is required to receive HD satellite broadcasts. Cable television companies in the U.S. generally prefer to use 256-QAM to transmit HDTV. Many of the newer HDTVs with integrated digital tuners include support for decoding 256-QAM in addition to 8VSB for OTA digital. Cable television companies started carrying HDTV in 2003.

5. High-definition television - Wikipedia

   en.wikipedia.org/wiki/High-definition_television

   HDTV can be recorded to D-VHS (Digital-VHS or Data-VHS), W-VHS (analog only), to an HDTV-capable digital video recorder (for example DirecTV's high-definition digital video recorder, Sky HD's set-top box, Dish Network's VIP 622 or VIP 722 high-definition digital video recorder receivers (these set-top boxes allow for HD on the Primary TV and SD ...

6. Digital cable - Wikipedia

   en.wikipedia.org/wiki/Digital_cable

   Digital cable allows for the broadcast of EDTV (480p) as well as HDTV (720p, 1080i, and 1080p). By contrast, analog cable transmits programs solely in the 480i format (the lowest television definition in use today).

7. QAM (television) - Wikipedia

   en.wikipedia.org/wiki/QAM_(television)

   QAM is a digital television standard using quadrature amplitude modulation. It is the format by which digital cable channels are encoded and transmitted via cable television providers. QAM is used in a variety of communications systems such as Dial-up modems and WiFi.