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  • 21:9 aspect ratio

    serch.it?q=21:9-aspect-ratio

    21:9 (2.:1) is the approximated screen aspect ratio of the true value 64:27 (2.:1) in comparison to the common ratio of 16:9 (1.:1). It is designed to show films recorded in CinemaScope of 2.35:1 or the modern anamorphic format of 2.39:1. The main benefit of this screen ratio is the absence of the black bars at the top and bottom of the screen when viewing content in this format, and a constant display height when displaying other content with a lesser aspect ratio. The 64:27 aspect ratio is an extension of the existing video aspect ratios 4:3 and 16:9, as it is the third power of 4:3, where 16:9 of traditional HDTV is 4:3 squared. This allows electronic scalers and optical anamorphic lenses to use an easily implementable 4:3 (1.3:1) scaling factor. The term "21:9" was chosen as a marketing term, likely first used by Philips. Due to its common denominator, 21:9 is more relatable to 16:9, the aspect ratio of regular HDTVs, rather than the correct 64:27 or 21:9. If it actually were 21:9, the fraction could also be expressed in the reduced form as 7:3, as related to the 4:3 of standard-definition TVs.

  • Hybrid Log-Gamma

    serch.it?q=Hybrid-Log-Gamma

    Hybrid Log-Gamma (HLG) is a high dynamic range (HDR) standard that was jointly developed by the BBC and NHK. The HLG standard is royalty-free and was approved as ARIB STD-B67 by the Association of Radio Industries and Businesses (ARIB). HLG is compatible with standard dynamic range (SDR) displays. HLG is defined in ATSC 3.0, Digital Video Broadcasting (DVB) UHD-1 Phase 2, and International Telecommunication Union (ITU) Rec. 2100. HLG is supported by HDMI 2.0b, HEVC, VP9, and H.264/MPEG-4 AVC. HLG is supported by video services such as BBC iPlayer, DirecTV, Freeview Play, and YouTube. Chart showing a conventional SDR gamma curve and Hybrid Log-Gamma (HLG). HLG uses a logarithmic curve for the upper half of the signal values which allows for a larger dynamic range.

  • Soundbar

    serch.it?q=Soundbar

    A soundbar, sound bar or media bar is a type of loudspeaker that projects audio from a wide enclosure. They are much wider than they are tall, partly for acoustical reasons, but also so that they can be mounted above or below a display device, e.g., above a computer monitor or under a television or home theater screen. Basically in a soundbar cabinet multiple speakers are placed which helps to create surround sound and/or stereo effect.

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