Data compression happens in

  • In what type of compression does data loss occur?

    Lossy compression is typically used when a file can afford to lose some data, and/or if storage space needs to be drastically 'freed up'.
    Here, an algorithm scans image files and reduces their size by discarding information considered less important or undetectable to the human eye..

  • In which layer data is compressed?

    Presentation- The sixth layer of the OSI model, is responsible for translation, encryption, authentication, and data compression..

  • Text compression techniques

    The principle of data compression is that, it compresses data by removing redundancy from the original data in the source file.
    On the other hand, information theory tells us that the amount of information conveyed by an event relates to its probability of occurrence..

  • Text compression techniques

    There are two types of compression: lossless and lossy.
    Lossless compression algorithms reduce the size of files without losing any information in the file, which means that we can reconstruct the original data from the compressed file..

Compression is done by a program that uses functions or an algorithm to effectively discover how to reduce the size of the data. For example, an algorithm might represent a string of bits with a smaller string of bits by using a 'reference dictionary' for conversion between them.

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