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  • Data compression - Wikipedia
    Data compression aims to reduce the size of data files, enhancing storage efficiency and speeding up data transmission Introduction to Compression Theory (PDF), Wiley, archived (PDF) from the original on 2007-09-28; EBU subjective listening tests on low-bitrate audio codecs; Audio Archiving Guide: Music Formats (Guide for helping a user
  • Lossy compression - Wikipedia
    It is possible to compress many types of digital data in a way that reduces the size of a computer file needed to store it, or the bandwidth needed to transmit it, with no loss of the full information contained in the original file A picture, for example, is converted to a digital file by considering it to be an array of dots and specifying the color and brightness of each dot
  • Smallpdf. com - Wikipedia
    It offers free version with limited features to compress, convert and edit PDF documents [3] And its paid version offers advanced features like OCR, compress, and more [4] History Smallpdf was founded in 2013 by Mathis Büchi, Lino Teuteberg, and Manuel Stofer while they were living abroad in Korea The idea came from the need for their
  • Lossless compression - Wikipedia
    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] By contrast, lossy compression permits reconstruction only of an approximation of the original data, though usually with greatly
  • Data compression ratio - Wikipedia
    Thus, a representation that compresses the storage size of a file from 10 MB to 2 MB yields a space saving of 1 - 2 10 = 0 8, often notated as a percentage, 80% For signals of indefinite size, such as streaming audio and video, the compression ratio is defined in terms of uncompressed and compressed data rates instead of data sizes:
  • Sumatra PDF - Wikipedia
    Sumatra PDF is written mainly by two contributors: Krzysztof Kowalczyk and Simon Bünzli [1] The source code is developed in two programming languages, mostly in C, with some components in C++ The source code is provided with support for Microsoft Visual Studio [18]As it was first designed when Windows XP was the current version of Windows, Sumatra initially had some incompatibilities with
  • PDF A - Wikipedia
    PDF is a standard for encoding documents in an "as printed" form that is portable between systems However, the suitability of a PDF file for archival preservation depends on options chosen when the PDF is created: most notably, whether to embed the necessary fonts for rendering the document; whether to use encryption; and whether to preserve additional information from the original document
  • PDF24 Creator - Wikipedia
    PDF24 Creator is an application software by Geek Software GmbH for the creation of PDF files from any application and for converting files to the PDF format The application is released under a proprietary freeware license The software has been developed in Germany since 2006, originally under the name PDFDrucker, [1] and is actively developed It is available in 32 languages, [4] including
  • Image compression - Wikipedia
    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 [1]Comparison of JPEG images saved by Adobe Photoshop at
  • File size - Wikipedia
    File size is a measure of how much data a computer file contains or how much storage space it is allocated Typically, file size is expressed in units based on byte A large value is often expressed with a metric prefix (as in megabyte and gigabyte ) or a binary prefix (as in mebibyte and gibibyte )





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