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  2. Video quality - Wikipedia

    en.wikipedia.org/wiki/Video_quality

    Such systems encode video streams and transmit them over various kinds of networks or channels. In the age of analog video systems, it was possible to evaluate the quality aspects of a video processing system by calculating the system's frequency response using test signals (for example, a collection of color bars and circles).

  3. Comparison of high-definition optical disc formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_high...

    The DD+ extension is used to replace the rear channels of the DD track with higher fidelity versions, along with adding additional channels for 6.1/7.1 audiotracks. On HD DVD, DD+ is used to encode all channels (up to 7.1), and no legacy DD track is required since all HD DVD players are required to decode DD+.

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

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

    [1] [failed verification] In the US, the 720p and 1080i formats are used for linear channels, while 1080p is available on a limited basis, mainly for pay-per-view and video on demand content. Some networks have also began transmitting content at 1080p via ATSC 3.0 multiplex channels, with CBS and NBC affiliates being the main stations that ...

  5. 4K resolution - Wikipedia

    en.wikipedia.org/wiki/4K_resolution

    The term "4K" is generic and refers to any resolution with a horizontal pixel count of approximately 4,000. [4]: 2 Several different 4K resolutions have been standardized by various organizations. The terms "4K" and "Ultra HD" are used more widely in marketing than "2160p".

  6. List of BBC television channels and radio stations - Wikipedia

    en.wikipedia.org/wiki/List_of_BBC_television...

    Arabic news channel available in the Arab World. Operated by BBC World Service. BBC News Persian: Persian news channel available in Europe, Iran, Afghanistan and Tajikistan. Operated by BBC World Service. BBC America: United States, a mixture of comedy, drama and lifestyle programming. Joint venture between BBC Studios Channels with AMC Networks.

  7. High-definition television - Wikipedia

    en.wikipedia.org/wiki/High-definition_television

    The ongoing competition between companies and nations to create true HDTV spanned the entire 20th century, as each new system became higher definition than the last. In the early 21st century, this race has continued with 4K, 5K and 8K systems.

  8. List of digital television deployments by country - Wikipedia

    en.wikipedia.org/wiki/List_of_digital_television...

    The package consists of 6 channels: IBA1, IBA33, Channel 2, Channel 10, Channel 23 (Israeli Educational Television) and The Knesset Channel. DVB-T broadcasts using the MPEG-4 Part 10, H.264 (AVC) video and HE AAC+ V2 audio codecs were launched in mid-2009. There were proceedings in the Knesset to add local music channel 24 to the system as well.

  9. ATSC standards - Wikipedia

    en.wikipedia.org/wiki/ATSC_standards

    On June 29, 2016, NBC affiliate WRAL-TV in Raleigh, North Carolina, a station known for its pioneering roles in testing the original DTV standards, launched an experimental ATSC 3.0 channel carrying the station's programming in 1080p, as well as a 4K demo loop.