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  2. Universal code (data compression) - Wikipedia

    en.wikipedia.org/wiki/Universal_code_(data...

    Universal codes are generally not used for precisely known probability distributions, and no universal code is known to be optimal for any distribution used in practice. A universal code should not be confused with universal source coding , in which the data compression method need not be a fixed prefix code and the ratio between actual and ...

  3. Universal Product Code - Wikipedia

    en.wikipedia.org/wiki/Universal_Product_Code

    A UPC barcode. The Universal Product Code (UPC or UPC code) is a barcode symbology that is used worldwide for tracking trade items in stores.. The chosen symbology has bars (or spaces) of exactly 1, 2, 3, or 4 units wide each; each decimal digit to be encoded consists of two bars and two spaces chosen to have a total width of 7 units, in both an "even" and an "odd" parity form, which enables ...

  4. Universal coding - Wikipedia

    en.wikipedia.org/wiki/Universal_coding

    Universal code (data compression), a fixed prefix code that, for any probability mass function, has a data compression ratio within a constant of the optimal prefix code; Universal source coding, a data compression method that asymptotically approaches the data compression ratio of the optimal data compression method, e.g., LZ77 and LZ78

  5. Philips circle pattern - Wikipedia

    en.wikipedia.org/wiki/Philips_circle_pattern

    The content and layout of the original colour circle pattern was designed by Danish engineer Finn Hendil (1939–2011) [1] in the Philips TV & Test Equipment laboratory in Amager (moved to Brøndby Municipality in 1989) near Copenhagen under supervision of chief engineer Erik Helmer Nielsen in 1966–67, largely building on their previous work ...

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  7. RC-5 - Wikipedia

    en.wikipedia.org/wiki/RC-5

    Each bit of the RC-5 code word contains 32 carrier pulses, and an equal duration of silence, so the bit time is 64×27.778 μs = 1.778 ms, and the 14 symbols (bits) of a complete RC-5 code word take 24.889 ms to transmit. The code word is repeated every 113.778 ms (4096 ÷ 36 kHz) as long as a key remains pressed.

  8. LG.Philips Displays - Wikipedia

    en.wikipedia.org/wiki/LG.Philips_Displays

    LG.Philips Displays was a joint venture created in 2001 by LG Electronics of South Korea and Philips Electronics of the Netherlands in response to the maturing cathode-ray tube (CRT) market. [ 9 ] [ 10 ] It primarily manufactured CRTs used in traditional television sets.

  9. Universal remote - Wikipedia

    en.wikipedia.org/wiki/Universal_remote

    Harmony 670, a universal remote. A universal remote is a remote control that can be programmed to operate various brands of one or more types of consumer electronics devices. . Low-end universal remotes can only control a set number of devices determined by their manufacturer, while mid- and high-end universal remotes allow the user to program in new control codes to the re