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  2. HDHomeRun - Wikipedia

    en.wikipedia.org/wiki/HDHomeRun

    Introduced in Fall 2011, the HDHomeRun PRIME provided the ability to view and record all the digital cable channels the user subscribed to without using a cable-supplied set-top-box. The device employed a CableCARD to replace the set-top box. The HDHomeRun PRIME could be integrated with Windows Media Center (WMC). With 3 tuners, the PRIME let ...

  3. Channel memory - Wikipedia

    en.wikipedia.org/wiki/Channel_memory

    The internal channel map for digital TV stations is different from the presets or "favorites" that the user has programmed. Just as with analog TV (which worked only by turning a preset on or off for each station/channel), users of digital television adapters and other similar tuners can choose to ignore channels that are still in the channel map.

  4. ATSC tuner - Wikipedia

    en.wikipedia.org/wiki/ATSC_tuner

    However, now "virtual channel" (technically known as logical channel number) numbers are common. So, Channel 4 digital signals may now actually be broadcast on channel 43, or any other frequency. When the ATSC tuner does a channel scan, it finds the signal on channel 43, learns that this material is called "Channel 4", and remembers that mapping.

  5. Channel scan - Wikipedia

    en.wikipedia.org/wiki/Channel_scan

    A channel scan may refer to: channel memory; channel surfing This page was last edited on 28 ...

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

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

    High-definition television (HDTV) in the United States was introduced in 1998 and has since become increasingly popular and dominant in the television market. Hundreds of HD channels are available in millions of homes and businesses both terrestrially and via subscription services such as satellite, cable and IPTV.

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  8. Television channel frequencies - Wikipedia

    en.wikipedia.org/wiki/Television_channel_frequencies

    Channels B, C, D, H, H1, and H2 are identical to Channels E4, E4A, E5, E10, E11, and E12, respectively. Channel A video carrier is the same as Channel E2 audio carrier and thus it used to be common that the audio from a distant TV station on channel E2 received via Sporadic E interferes with Channel A video and vice versa.

  9. Interlaced video - Wikipedia

    en.wikipedia.org/wiki/Interlaced_video

    The interlaced scan pattern in a standard definition CRT display also completes such a scan, but in two passes (two fields). The first pass displays the first and all odd numbered lines, from the top left corner to the bottom right corner. The second pass displays the second and all even numbered lines, filling in the gaps in the first scan.