{"id":805,"date":"2020-01-03T14:31:18","date_gmt":"2020-01-03T14:31:18","guid":{"rendered":"http:\/\/mp4gain.com\/mp4gain\/?p=805"},"modified":"2020-01-03T14:31:18","modified_gmt":"2020-01-03T14:31:18","slug":"how-does-file-compression-work","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/mp4gain\/how-does-file-compression-work\/","title":{"rendered":"How does file compression work?"},"content":{"rendered":"<p>It is incredible that many of us not only use but also regularly practice the task of compressing files without understanding very well how this practice really works. The reality is that in a compression everything is transformed.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mp4gain.com\/mp4gain\/how-does-file-compression-work\/#How_does_file_compression_work\" >How does file compression work?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mp4gain.com\/mp4gain\/how-does-file-compression-work\/#Methods_used_to_compress\" >Methods used to compress:<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"How_does_file_compression_work\"><\/span>How does file compression work?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Basically compressing is removing redundant values \u200b\u200bfrom a file, or what is the same, removing what is repeated. Suppose a file is composed of &#8220;MMMMMM&#8221;, compressing it would be &#8220;6M&#8221;. Being more specific and looking for all these chains, compression programs can compress several megabytes in just KB of files that have not previously been compressed.<br \/>\nThe difference between basic and redundant information is called entropy.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Methods_used_to_compress\"><\/span>\nMethods used to compress:<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"http:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/01\/winrar-logo.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-806\" src=\"http:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/01\/winrar-logo.png\" alt=\"\" width=\"200\" height=\"176\" \/><\/a><\/p>\n<p>1) <strong>Without loss<\/strong>:<br \/>\n&#8211; EXAMPLE FILES: ZIP, PNG, RAR, H264 and others<br \/>\nThis method consists of summarizing the information by removing what is redundant, as we mentioned earlier. It is like saying the same thing but in another way, in a summarized or compressed way. The good thing about this compression is that it is reversible and the files do not lose any quality. When you unzip a file with this technique, it will have exactly the same composition as before compressing it or what is the same as having the original file.<\/p>\n<p>2) <strong>With loss<\/strong>:<\/p>\n<p><a href=\"http:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/01\/mp3_file_37566.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-807\" src=\"http:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/01\/mp3_file_37566.jpg\" alt=\"\" width=\"200\" height=\"200\" srcset=\"https:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/01\/mp3_file_37566.jpg 200w, https:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/01\/mp3_file_37566-150x150.jpg 150w\" sizes=\"auto, (max-width: 200px) 85vw, 200px\" \/><\/a><br \/>\n&#8211; EXAMPLE FILES: Mp3, Jpg, MPG<br \/>\nThese files lose quality because the compression parameters are removed, although they are not strictly necessary, they remove integrity and quality from the file.<\/p>\n<p>In an image file, brightness, thresholds, and quality are removed, while for example in audio files, spaces, volume, and frequencies not audible by the human ear are removed.<\/p>\n<p>Creating compressed files today is an easy task, any image editor allows you to convert to Jpg for example. In lossless compression, it requires programs such as Winrar or Winzip, programs that have become common in the use of the Internet as they not only compress but also allow a large file to be divided into small parts to facilitate downloading.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>It is incredible that many of us not only use but also regularly practice the task of compressing files without understanding very well how this practice really works. The reality is that in a compression everything is transformed. How does file compression work? Basically compressing is removing redundant values \u200b\u200bfrom a file, or what is &hellip; <a href=\"https:\/\/mp4gain.com\/mp4gain\/how-does-file-compression-work\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;How does file compression work?&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[257],"tags":[20954,20951,6596,20947,20948,20949,20942,20946,20945,20943,20944,20955,20959,20960,20956,20958,20957,20961,20962,20970,20967,20964,20968,20966,20965,20937,20977,20972,20976,20974,20978,20971,20975,20973,20984,20982,20981,20983,20985,20980,20941,20996,20994,20995,20993,20992,20991,20989,20990,20938,20999,20998,20936,20939,20940,6634,20987,20963,20969,20986,20979,20988,20997,20950,20952,20953],"class_list":["post-805","post","type-post","status-publish","format-standard","hentry","category-audio-normalizer","tag-a-tutorial-on-mpeg-audio-compression","tag-an-open-audio-compression-format","tag-audio-compression","tag-audio-compression-aac","tag-audio-compression-adobe-audition","tag-audio-compression-adobe-premiere","tag-audio-compression-algorithms","tag-audio-compression-amplifier","tag-audio-compression-and-decompression","tag-audio-compression-app","tag-audio-compression-attack-and-release","tag-audio-compression-basics","tag-audio-compression-benchmark","tag-audio-compression-bits","tag-audio-compression-block-diagram","tag-audio-compression-bluetooth","tag-audio-compression-book","tag-audio-compression-book-download","tag-audio-compression-box","tag-audio-compression-c-code","tag-audio-compression-calculator","tag-audio-compression-camtasia","tag-audio-compression-cheat-sheet-pdf","tag-audio-compression-codecs","tag-audio-compression-comparison","tag-audio-compression-definition","tag-audio-compression-demonstration","tag-audio-compression-diagram","tag-audio-compression-difference","tag-audio-compression-digital","tag-audio-compression-dj","tag-audio-compression-driver","tag-audio-compression-drums","tag-audio-compression-dsp","tag-audio-compression-echo","tag-audio-compression-editor","tag-audio-compression-effect","tag-audio-compression-error","tag-audio-compression-exe","tag-audio-compression-exercises","tag-audio-compression-explained","tag-audio-compression-ffmpeg","tag-audio-compression-file-types","tag-audio-compression-filter","tag-audio-compression-final-cut-pro-x","tag-audio-compression-for-dummies","tag-audio-compression-for-podcast","tag-audio-compression-for-streaming","tag-audio-compression-for-tv","tag-audio-compression-formats","tag-audio-compression-github","tag-audio-compression-guide","tag-audio-compression-ratio","tag-audio-compression-software","tag-audio-compression-sonos","tag-audio-compression-techniques","tag-audio-editing-compression","tag-b-audio-compression","tag-c-real-time-audio-compression","tag-compression-audio-engineering","tag-d-audio-compression","tag-e-audio-compression","tag-f-audio-compression","tag-the-audio-compression-format","tag-what-is-a-audio-compression","tag-what-is-a-audio-compression-file"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How does file compression work? - mp4gain.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mp4gain.com\/mp4gain\/how-does-file-compression-work\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How does file compression work? - mp4gain.com\" \/>\n<meta property=\"og:description\" content=\"It is incredible that many of us not only use but also regularly practice the task of compressing files without understanding very well how this practice really works. 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Linkedin\",\"sameAs\":[\"https:\/\/www.linkedin.com\/in\/ricardoariaszorrilla\/\"],\"url\":\"https:\/\/mp4gain.com\/mp4gain\/author\/mp4gain\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"How does file compression work? - mp4gain.com","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/mp4gain.com\/mp4gain\/how-does-file-compression-work\/","og_locale":"en_US","og_type":"article","og_title":"How does file compression work? - mp4gain.com","og_description":"It is incredible that many of us not only use but also regularly practice the task of compressing files without understanding very well how this practice really works. The reality is that in a compression everything is transformed. How does file compression work? Basically compressing is removing redundant values \u200b\u200bfrom a file, or what is &hellip; Continue reading \"How does file compression work?\"","og_url":"https:\/\/mp4gain.com\/mp4gain\/how-does-file-compression-work\/","og_site_name":"mp4gain.com","article_publisher":"https:\/\/www.facebook.com\/mp4gain","article_published_time":"2020-01-03T14:31:18+00:00","og_image":[{"url":"http:\/\/mp4gain.com\/mp4gain\/wp-content\/uploads\/2020\/01\/winrar-logo.png","type":"","width":"","height":""}],"author":"R. Arias","twitter_card":"summary_large_image","twitter_creator":"@mp4gain","twitter_site":"@mp4gain","twitter_misc":{"Written by":"R. Arias","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/mp4gain.com\/mp4gain\/how-does-file-compression-work\/#article","isPartOf":{"@id":"https:\/\/mp4gain.com\/mp4gain\/how-does-file-compression-work\/"},"author":{"name":"R. 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Arias","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/8ca03263e87418cfde07c571c83fa172297ce230085e4f181b9e5f9af745d6be?s=96&d=blank&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/8ca03263e87418cfde07c571c83fa172297ce230085e4f181b9e5f9af745d6be?s=96&d=blank&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/8ca03263e87418cfde07c571c83fa172297ce230085e4f181b9e5f9af745d6be?s=96&d=blank&r=g","caption":"R. Arias"},"description":"R. Arias is the author of this article and has extensive experience for more than 30 years as a recording engineer and audio specialist, as well as more than 20 years of experience creating algorithms related to audio and video. 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