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  2. Comparison of spreadsheet software - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_spreadsheet...

    The operating systems the software can run on natively (without emulation).Android and iOS apps can be optimized for Chromebooks and iPads which run the operating systems ChromeOS and iPadOS respectively, the operating optimizations include things like multitasking capabilities, large and multi-display support, better keyboard and mouse support.

  3. Chroma subsampling - Wikipedia

    en.wikipedia.org/wiki/Chroma_subsampling

    Digital signals are often compressed to reduce file size and save transmission time. Since the human visual system is much more sensitive to variations in brightness than color, a video system can be optimized by devoting more bandwidth to the luma component (usually denoted Y'), than to the color difference components Cb and Cr .

  4. Proprietary file format - Wikipedia

    en.wikipedia.org/wiki/Proprietary_file_format

    A proprietary file format is a file format of a company, organization, or individual that contains data that is ordered and stored according to a particular encoding-scheme, such that the decoding and interpretation of this stored data is easily accomplished only with particular software or hardware that the company itself has developed.

  5. Macroblock - Wikipedia

    en.wikipedia.org/wiki/Macroblock

    This design is also used in JPEG and most other macroblock-based video codecs with a fixed transform block size, such as MPEG-1 Part 2 and H.262/MPEG-2 Part 2. In other chroma subsampling formats, e.g. 4:0:0, 4:2:2, or 4:4:4, the number of chroma samples in a macroblock will be smaller or larger, and the grouping of chroma samples into blocks ...

  6. Luma (video) - Wikipedia

    en.wikipedia.org/wiki/Luma_(video)

    Luma is the weighted sum of gamma-compressed R′G′B′ components of a color video—the prime symbols ′ denote gamma compression. The word was proposed to prevent confusion between luma as implemented in video engineering and relative luminance as used in color science (i.e. as defined by CIE).

  7. What to know about the company behind Puerto Rico's ... - AOL

    www.aol.com/news/know-company-behind-puerto...

    A massive power outage blanketed most of Puerto Rico early Tuesday, leaving more than 1.2 million people without electricity. Here's what to know about the blackout and Luma Energy, which handles ...

  8. GNOME Keyring - Wikipedia

    en.wikipedia.org/wiki/GNOME_Keyring

    GNOME Keyring is a software application designed to store security credentials such as usernames, [2] passwords, [2] and keys, together with a small amount of relevant metadata. The sensitive data is encrypted and stored in a keyring file in the user's home directory .

  9. Chroma key - Wikipedia

    en.wikipedia.org/wiki/Chroma_key

    Chroma key compositing, or chroma keying, is a visual-effects and post-production technique for compositing (layering) two or more images or video streams together based on color hues (chroma range). The technique has been used in many fields to remove a background from the subject of a photo or video – particularly the newscasting , motion ...