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  2. Transparency (data compression) - Wikipedia

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

    In data compression and psychoacoustics, transparency is the result of lossy data compression accurate enough that the compressed result is perceptually indistinguishable from the uncompressed input, i.e. perceptually lossless. A transparency threshold is a given value at which transparency is reached. It is commonly used to describe compressed ...

  3. Display Stream Compression - Wikipedia

    en.wikipedia.org/wiki/Display_Stream_Compression

    ISO 29170 more specifically defines an algorithm as visually lossless "when all the observers fail to correctly identify the reference image more than 75% of the trials". [4]: 18 However, the standard allows for images that "exhibit particularly strong artifacts" to be disregarded or excluded from testing, such as engineered test images.

  4. JPEG XS - Wikipedia

    en.wikipedia.org/wiki/JPEG_XS

    JPEG XS favors visually lossless quality in combination with low latency and low complexity, over date reduction through compression. It is not a direct competitor to alternative image codecs like JPEG 2000 and JPEG XL or video codecs like AV1, AVC/H.264 and HEVC/H.265 which tend to focus on compression efficiency. Other important features are:

  5. Image compression - Wikipedia

    en.wikipedia.org/wiki/Image_compression

    Image compression is a type of data compression applied to digital images, to reduce their cost for storage or transmission. Algorithms may take advantage of visual perception and the statistical properties of image data to provide superior results compared with generic data compression methods which are used for other digital data.

  6. Lossy compression - Wikipedia

    en.wikipedia.org/wiki/Lossy_compression

    Even when noticeable by the user, further data reduction may be desirable (e.g., for real-time communication or to reduce transmission times or storage needs). The most widely used lossy compression algorithm is the discrete cosine transform (DCT), first published by Nasir Ahmed , T. Natarajan and K. R. Rao in 1974.

  7. Comparison of video container formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_video...

    Lossless: 2001-07 Open source Yes Yes No Yes Yes No No No No ALAC: Lossless: 2004-04 Open source Yes Yes Yes Yes Yes No No No No WMA Lossless: Lossless: 2003-01 Proprietary [97] ACM [d] No No Yes Yes No No No No DTS-HD: Lossless: 2011-08 Proprietary: Yes Yes [45] Yes No No No No No No Dolby TrueHD: Lossless: 2006-04 Proprietary: Mature [ζ] Yes ...

  8. Lossless compression - Wikipedia

    en.wikipedia.org/wiki/Lossless_compression

    Lossless compression is a class of data compression that allows the original data to be perfectly reconstructed from the compressed data with no loss of information. Lossless compression is possible because most real-world data exhibits statistical redundancy. [1]

  9. Lossless JPEG - Wikipedia

    en.wikipedia.org/wiki/Lossless_JPEG

    Lossless JPEG is a 1993 addition to JPEG standard by the Joint Photographic Experts Group to enable lossless compression. However, the term may also be used to refer to all lossless compression schemes developed by the group, including JPEG 2000 , JPEG-LS, and JPEG XL .