{"id":3041,"date":"2021-01-11T18:19:42","date_gmt":"2021-01-11T18:19:42","guid":{"rendered":"http:\/\/mp4gain.com\/mp4gain\/?p=3041"},"modified":"2021-01-11T18:19:42","modified_gmt":"2021-01-11T18:19:42","slug":"what-methods-are-used-to-compress-digital-audio-effectively","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/mp4gain\/what-methods-are-used-to-compress-digital-audio-effectively\/","title":{"rendered":"What methods are used to compress digital audio effectively?"},"content":{"rendered":"

What methods are used to compress digital audio effectively?<\/strong><\/p>\n

\"Compress<\/p>\n

\"COMPRESS<\/p>\n

Currently, the most famous are Audio MPEG, PASC and ATRAC. All of them
\nuse the so-called “perceptual
\nencoding) in which information is removed from the sound signal,
\nperceptible to the ear. As a result, despite the change in shape and spectrum
\nsignal, your hearing perception is practically unchanged, and the degree
\nCompression accounts for the slight reduction in quality. Such encoding
\nrefers to lossy compression methods, when
\nit is no longer possible to accurately reconstruct the original waveform from the compressed signal
\nshape.<\/p>\n

 <\/p>\n

The techniques to eliminate part of the information are based on the characteristics of the human being.
\nwho to listen to, called masking: if there is a high
\nstrong peaks (dominant harmonics) weaker frequency content
\nhear in the immediate vicinity of them practically no
\naccepted (masked). When encoding, the entire audio stream is divided
\nis divided into small squares, each of which becomes a spectral
\npresentation and is divided into several frequency bands. Within the stripes there are
\nperforms the definition and removal of masked sounds, after which each frame
\nit undergoes adaptive coding directly in spectral form. All
\nthese operations can significantly reduce (several times) the volume
\ndata while maintaining acceptable quality for most listeners
\nI read.<\/p>\n

Each of the encoding methods described is characterized by a bit rate
\nthe bitrate with which the compressed information should come
\non the cable box when the audio signal is restored. Decoder converts
\na series of instantaneous signal spectra compressed into a conventional digital waveform
\nshape.<\/p>\n

MPEG Audio – A group of MPEG standardized audio compression methods
\n(Moving Pictures Experts Group – a group of experts to process motion
\nimages). MPEG audio methods exist in various
\ntypes – MPEG-1, MPEG-2, etc .; currently the most common
\nnot MPEG-1 type.<\/p>\n

There are three layers of MPEG-1 audio for stereo compression.
\nyour signals:<\/p>\n

1 – 1: 4 compression ratio with a data stream of 384 kbps;
\n2-1: 6..1: 8 at 256..192 kbps;
\n3 – 1: 10..1: 12 at 128..112 kbps.<\/p>\n

The minimum data rate in each layer is defined as 32
\nkbps; specified bit rates maintain signal quality
\nroughly at the level of a CD.<\/p>\n

All three levels use the input split spectral transformation
\nchanging the frame in 32 frequency bands. The most optimal in relation
\ndata volume and sound quality recognized as level 3 with bit rate
\n128 kbps and a data density of approximately 1 Mb \/ min. When compressed from a bottom
\nat what speeds the forced limiting of the frequency band starts to
\n15-16 kHz, and channel phase distortions also occur (effects such as
\nphaser or flanger).<\/p>\n

MPEG audio is used in computer sound systems, CD-i \/ DVD,
\nCD-ROM “audio”, digital radio \/ television and other systems
\nmassive sound transmission.<\/p>\n

PASC (Precision Adaptive Subband Coding – Precise Adaptive Intraband
\ncoding) – a special case of Audio MPEG-1 Layer 1 with a speed
\nStream 384 kbps (1: 4 compression). Used in the DCC system.<\/p>\n

ATRAC (Adaptive TRansform Acoustic Coding – acoustic coding
\nadaptive transformation) is based on stereophonic sound
\n16-bit quantized format with a 44.1 kHz sample rate.
\nWhen compressed, each frame is divided into 52 frequency bands, resulting in
\ntransmission speed: 292 kbps (1: 5 compression). Applied in the system<\/p>\n","protected":false},"excerpt":{"rendered":"

What methods are used to compress digital audio effectively? Currently, the most famous are Audio MPEG, PASC and ATRAC. All of them use the so-called “perceptual encoding) in which information is removed from the sound signal, perceptible to the ear. As a result, despite the change in shape and spectrum signal, your hearing perception is … Continue reading “What methods are used to compress digital audio effectively?”<\/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":[22888,28067,22897,22895,22901,22902,22903,22899,43025,57136,22933,22909,22910,22920,22922,22921,22919,22940,22939,22938,22935,22936,22941,22907,22946,22944,41197,22913,22918,22916,22914,22925,22923,22891,15335,22949,22950,22892,22951,57138,22889,28075,22947,28077,41194,22934,22937,22932,22929,58660,22953,47818,22924,57137,28071,28088,28072,28073,28087,28074,28089,41199,22954,43027,41195,22905,22908,58661,22958,22957,22956,43028,41202,22955,22959,22960,50676],"class_list":["post-3041","post","type-post","status-publish","format-standard","hentry","category-audio-video","tag-are-digital-audio-and-optical-the-same","tag-are-digital-audio-players-worth-it","tag-can-a-digital-audio-cable-go-bad","tag-can-digital-audio-be-converted-to-analog","tag-can-dogs-hear-digital-audio","tag-can-midi-transfer-digital-audio","tag-can-you-convert-digital-audio-to-analog","tag-can-you-convert-digital-audio-to-rca","tag-can-you-split-digital-audio-signal","tag-cant-get-digital-audio","tag-digital-audio-has-no-sound","tag-do-digital-audio-cables-go-bad","tag-do-digital-audio-converters-work","tag-does-digital-audio-cable-make-a-difference","tag-does-digital-audio-carry-video","tag-does-digital-audio-software-needs-magnetism","tag-does-digital-audio-support-5-1","tag-does-displayport-have-digital-audio","tag-does-imac-have-digital-audio-out","tag-does-ipad-have-digital-audio-output","tag-does-ps4-have-digital-audio-out","tag-does-roku-have-digital-audio-out","tag-does-tv-have-digital-audio-out","tag-how-did-digital-audio-start","tag-how-digital-audio-system","tag-how-digital-audio-works","tag-how-do-digital-audio-files-work","tag-how-do-digital-audio-filters-work","tag-how-do-digital-audio-systems-work","tag-how-do-digital-audio-work","tag-how-do-digital-audiobooks-work","tag-how-does-digital-audio-out-work","tag-how-does-digital-audio-work","tag-is-digital-audio","tag-is-digital-audio-analog","tag-is-digital-audio-better-than-analog","tag-is-digital-audio-cable-same-as-rca","tag-is-digital-audio-coaxial","tag-is-digital-audio-input-the-same-as-aux","tag-is-digital-audio-or-hdmi-better","tag-is-digital-audio-out-the-same-as-optical","tag-is-digital-audio-out-the-same-as-toslink","tag-is-digital-audio-the-same-as-optical","tag-is-digital-audio-workstation","tag-is-digital-audio-workstation-free","tag-piotr-has-digital-audio","tag-tv-doesnt-have-digital-audio-out","tag-tv-has-digital-audio","tag-tv-only-has-digital-audio-out","tag-what-are-digital-audio-cables","tag-what-digital-audio-output","tag-what-do-digital-audio","tag-what-does-digital-audio-out-mean","tag-what-does-digital-audio-output-pcm-mean","tag-what-is-digital-audio","tag-what-is-digital-audio-broadcasting","tag-what-is-digital-audio-out","tag-what-is-digital-audio-output","tag-what-is-digital-audio-output-on-tv","tag-what-is-digital-audio-s-pdif","tag-what-is-digital-audio-workstation","tag-what-should-digital-audio-output-be","tag-whats-digital-audio","tag-whats-digital-audio-out","tag-when-did-digital-audio-begin","tag-when-did-digital-audio-recording-begin","tag-when-did-digital-optical-audio-come-out","tag-when-to-use-optical-digital-audio-cable","tag-where-is-the-digital-audio-output-on-a-samsung-tv","tag-which-digital-audio-cable-is-best","tag-which-digital-audio-format-is-best","tag-which-digital-audio-player","tag-which-digital-audio-recorders","tag-which-digital-audio-workstation-is-best","tag-why-digital-audio-is-better-than-analog","tag-will-rca-cable-work-digital-audio","tag-xbox-have-digital-audio"],"yoast_head":"\nWhat methods are used to compress digital audio effectively? - 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\/what-methods-are-used-to-compress-digital-audio-effectively\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What methods are used to compress digital audio effectively? - mp4gain.com\" \/>\n<meta property=\"og:description\" content=\"What methods are used to compress digital audio effectively? Currently, the most famous are Audio MPEG, PASC and ATRAC. All of them use the so-called “perceptual encoding) in which information is removed from the sound signal, perceptible to the ear. As a result, despite the change in shape and spectrum signal, your hearing perception is … Continue reading "What methods are used to compress digital audio effectively?"\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mp4gain.com\/mp4gain\/what-methods-are-used-to-compress-digital-audio-effectively\/\" \/>\n<meta property=\"og:site_name\" content=\"mp4gain.com\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/mp4gain\" \/>\n<meta property=\"article:published_time\" content=\"2021-01-11T18:19:42+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/grahammitchell.com\/writings\/digital_wave.png\" \/>\n<meta name=\"author\" content=\"R. 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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":"What methods are used to compress digital audio effectively? - 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\/what-methods-are-used-to-compress-digital-audio-effectively\/","og_locale":"en_US","og_type":"article","og_title":"What methods are used to compress digital audio effectively? - mp4gain.com","og_description":"What methods are used to compress digital audio effectively? Currently, the most famous are Audio MPEG, PASC and ATRAC. All of them use the so-called “perceptual encoding) in which information is removed from the sound signal, perceptible to the ear. 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