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  2. List of most-viewed YouTube channels - Wikipedia

    en.wikipedia.org/wiki/List_of_most-viewed...

    This is an accepted version of this page This is the latest accepted revision, reviewed on 11 February 2025. This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources. Indian record label T-Series is the most-viewed YouTube channel, with over 283 billion views. The list of most-viewed YouTube ...

  3. ATSC standards - Wikipedia

    en.wikipedia.org/wiki/ATSC_standards

    ATSC signals are designed to use the same 6 MHz bandwidth as analog NTSC television channels (the interference requirements of A/53 DTV standards with adjacent NTSC or other DTV channels are very strict). Once the digital video and audio signals have been compressed and multiplexed, the transport stream can be modulated in different ways ...

  4. Digital television - Wikipedia

    en.wikipedia.org/wiki/Digital_television

    This means that digital broadcasters can provide more digital channels in the same space, provide high-definition television service, or provide other non-television services such as multimedia or interactivity. DTV also permits special services such as multiplexing (more than one program on the same channel), electronic program guides and ...

  5. Digital television in the United States - Wikipedia

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

    Enhanced definition—480p, about the same quality as DVDs; High definition—720p; High definition—1080i; 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 ...

  6. Nielsen Media Research - Wikipedia

    en.wikipedia.org/wiki/Nielsen_Media_Research

    In July 2017, Nielsen announced that it would include select programs from subscription-based video on demand (SVOD) services Hulu and YouTube TV in its Digital in TV Ratings system. [19] Since about October 2017, Nielsen also began to track select programs from Netflix. Partnering distributors insert a "tag" into the program to be distributed ...

  7. Television content rating system - Wikipedia

    en.wikipedia.org/wiki/Television_content_rating...

    Singapore has adopted the use of TV Ratings from 21 October 2011. They consist of PG and PG13 ratings for Free-to-Air TV and NC16 and M18 ratings in addition to the PG and PG13 ratings for Pay TV channels. For Free-to-Air TV, the shows rated PG may be aired anytime while PG13 should air between 10pm to 6am. For Pay TV, PG13 rated programmes can ...

  8. Test card - Wikipedia

    en.wikipedia.org/wiki/Test_card

    Test cards typically contain a set of patterns to enable television cameras and receivers to be adjusted to show the picture correctly (see SMPTE color bars).Most modern test cards include a set of calibrated color bars which will produce a characteristic pattern of "dot landings" on a vectorscope, allowing chroma and tint to be precisely adjusted between generations of videotape or network feeds.

  9. List of digital television deployments by country - Wikipedia

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

    Singapore's digital TV (DTV) journey started in 2012 when it was announced that the nation's free-to-air TV channels will go fully digital using the DVB-T2 (Digital Video Broadcasting – Second Generation Terrestrial) broadcasting standard. Since December 2013, all seven Mediacorp channels have been broadcast in digital.