{"id":3838,"date":"2021-06-29T19:21:40","date_gmt":"2021-06-29T19:21:40","guid":{"rendered":"http:\/\/mp4gain.com\/mp4gain\/?p=3838"},"modified":"2021-06-29T19:21:40","modified_gmt":"2021-06-29T19:21:40","slug":"methods-of-compression-and-compression-of-audio-signals-part-3","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/mp4gain\/methods-of-compression-and-compression-of-audio-signals-part-3\/","title":{"rendered":"Methods of compression and compression of audio signals Part 3"},"content":{"rendered":"

Methods of compression and compression of audio signals Part 3<\/strong><\/p>\n

\"Audio<\/p>\n

The most popular compression format today is MP3.<\/p>\n

The MP3 (MPEG Layer 3) format was developed, after several intermediate formats, by the Fraunhofer Institute in Germany. Actually, the .MP3 format relies on fooling the human ear. After some research, it turned out that human hearing tends to adapt to the appearance of new sounds, which is expressed in an increase in the hearing threshold. Therefore, some sounds are capable of masking (that is, making them subjectively inaudible) others. So in this format, some of the sounds that, according to the corresponding theory, are made inaudible, are simply removed from the general sound. The resulting “semi-finished product” is then encoded using the Hoffman method. Be sure to note that in the MP3 format, programs that compress the sound of the original are not standardized, that is, each competent programmer can implement their own compression scheme. And only the decoders obey the standards, which leads to the fact that the quality of MP3 playback does not always depend on the player that plays this file. Due to the different abilities and predilections of implementers of various encoders, some of them are better at handling symphonic music, some at rock and metal, some at rap and rave, etc.<\/p>\n

JointStereo, which is one of the features of MP3, means that instead of encoding stereo as two independent channels, it encodes the call. center channel and the difference from the original stereo channels. Many stereo channel audio components are the same, and encoding them on the common channel allows you to free up additional bandwidth for more detailed encoding of the difference, leading to improved quality.<\/p>\n

Be sure to mention the variable bit rate or VBR. This means that the encoder changes the compression ratio on the fly, depending on the nature of the sound. This approach results in a reduction in the final file size or, if quality requirements increase, the same file size produces better sound.<\/p>\n

MP3 Pro – Introduced in 2001, the MP3 Pro codec was developed by Coding Technologies in association with Thomson Multimedia. It is MP3 based and as a result it turned out to be fully MP3 backward compatible and only partially forward compatible. It uses SBR (Spectral Band Replication) technology, so the codec provides good quality at low bit rates. However, the encoding quality at medium to high bit rates is inferior to almost all other codecs. As a result, MP3 Pro is used more for streaming on the Internet and demonstrating snippets of new musical compositions.<\/p>\n

The MPEG-4 audio standard does not require a single or small set of highly efficient compression schemes, but rather a complex set to perform a wide range of operations, from low-quality speech coding to high-quality music and audio synthesis.<\/p>\n

The MPEG-4 family of audio coding algorithms ranges from low quality voice (up to 2 kbps) to high quality audio (64 kbps per channel and higher).<\/p>\n

RAW – Yes, it is not just the image format in which some digital cameras write photographs. In fact, RAW is the so-called. “Pure digitization”, which does not contain a title and contains only a sequence of samples of a sound wave. Typically, the scan is stored in 16-bit format.<\/p>\n

Shorten is one of the first lossless codecs to appear. For a long time the project “slept sweetly.” However, in 2007, it began to develop again.<\/p>\n

TTA (True Audio) – Finally about the most interesting. TTA is being developed by a team of our compatriots. And, I must say, the result of their work is impressive. All in order.<\/p>\n

The codec is still quite young, but despite this it contains all the necessary features. We won’t list them again, we’ll just note that the format only lacks support for streaming audio over the network.<\/p>\n

The format is open, as well as the source codes of the encoder program. There are compiled versions for Mac and Linux. There should be no compatibility issues during playback either, because there are already plugins for all popular players, as well as DirectShow filters for Windows Media Player. There is a plugin for Adobe Audition, which is important for musicians. For the past 4 years, hardware support has even appeared on players!<\/p>\n

WAV – This is the primary audio format for many, many digital audio playback systems and is used as a standard audio file format on personal computers.<\/p>\n","protected":false},"excerpt":{"rendered":"

Methods of compression and compression of audio signals Part 3 The most popular compression format today is MP3. The MP3 (MPEG Layer 3) format was developed, after several intermediate formats, by the Fraunhofer Institute in Germany. Actually, the .MP3 format relies on fooling the human ear. After some research, it turned out that human hearing … Continue reading “Methods of compression and compression of audio signals Part 3”<\/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":[1],"tags":[27872,27873,24553,62451,27884,27883,33005,27885,27881,27878,27836,27882,62450,27887,27886,27869,27870,27876,27877,27879,27874,51462,27892,27888,27890,27889,27895,27894,42112,27896,62452,27900,27901,27893,51146],"class_list":["post-3838","post","type-post","status-publish","format-standard","hentry","category-audio-video","tag-audio-compression-can-be-used-for","tag-audio-compression-can-be-used-for-mcq","tag-does-audio-compression-help","tag-does-zoom-compression-audio","tag-how-audio-compression-is-carried-out-in-mp3","tag-how-audio-compression-works","tag-how-audio-file-compression-works","tag-how-compression-audio","tag-how-does-audio-compression-ratio-work","tag-how-does-audio-compression-work","tag-how-does-lossless-audio-compression-work","tag-how-does-lossy-audio-compression-work","tag-how-to-do-audio-compression","tag-how-to-hear-audio-compression","tag-how-to-use-audio-compression","tag-what-are-audio-compression-format","tag-what-are-the-audio-compression-techniques","tag-what-does-audio-compression-do","tag-what-does-audio-compression-do-in-camtasia","tag-what-does-audio-compression-mean","tag-what-is-audio-compression","tag-what-is-audio-compression-format","tag-what-is-audio-compression-in-camtasia","tag-what-is-audio-compression-in-multimedia","tag-what-is-audio-compression-sonos","tag-what-is-audio-compression-used-for","tag-when-to-use-audio-compression","tag-when-was-audio-compression-invented","tag-which-audio-compression","tag-which-is-the-best-audio-compression-format","tag-which-lossy-method-for-audio-compression-is-responsible","tag-who-invented-audio-compression","tag-why-audio-compression-is-needed","tag-why-is-audio-compression-important","tag-why-is-digital-audio-compression"],"yoast_head":"\nMethods of compression and compression of audio signals Part 3 - 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\/methods-of-compression-and-compression-of-audio-signals-part-3\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Methods of compression and compression of audio signals Part 3 - mp4gain.com\" \/>\n<meta property=\"og:description\" content=\"Methods of compression and compression of audio signals Part 3 The most popular compression format today is MP3. 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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":"Methods of compression and compression of audio signals Part 3 - 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\/methods-of-compression-and-compression-of-audio-signals-part-3\/","og_locale":"en_US","og_type":"article","og_title":"Methods of compression and compression of audio signals Part 3 - mp4gain.com","og_description":"Methods of compression and compression of audio signals Part 3 The most popular compression format today is MP3. The MP3 (MPEG Layer 3) format was developed, after several intermediate formats, by the Fraunhofer Institute in Germany. 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