{"id":3113,"date":"2021-01-26T20:43:26","date_gmt":"2021-01-26T20:43:26","guid":{"rendered":"http:\/\/mp4gain.com\/mp4gain\/?p=3113"},"modified":"2021-01-26T20:43:26","modified_gmt":"2021-01-26T20:43:26","slug":"digital-audio-encoding-3","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/mp4gain\/digital-audio-encoding-3\/","title":{"rendered":"Digital audio encoding"},"content":{"rendered":"

Digital audio encoding<\/strong><\/p>\n

\"Digital<\/p>\n

In fact, one or another digital form of representation of analog audio signals is already a coding method – a sequence of numbers that describes an analog audio signal is itself a digital code.<\/p>\n

\"Digital<\/p>\n

However, the encoding that we are going to talk about now is something else. Now let’s look at the methods of encoding digital audio signals.<\/p>\n

A digitized audio signal “in its pure form” is a fairly accurate, but not the most compact, way of recording the original analog signal.<\/p>\n

Judge for yourself. To obtain complete information about the original analog signal in the frequency range 0-20 kHz (in the audible frequency range), the analog signal must be sampled at a frequency of at least 40 kHz. Therefore, the CD – DA standard (the standard for recording data on audio CDs familiar to all) establishes the following encoding parameters: recording of two or one channel in PCM format with a sampling frequency of 44.1 kHz and a 16-bit quantization bit depth. One hour of music in this format takes up approximately 600 MB of space (60 minutes * 60 seconds * 2 channels * 44100 samples per second * 2 bytes per sample = approximately 605 MB). Taking into account that, for example, the music collection of an ordinary music lover may have 5,000 tracks with an average length of about 3 minutes each, the amount of memory required to store it in its original digital form is quite significant. Awesome. Therefore, storing relatively large amounts of audio data, ensuring fairly good sound quality, requires the use of various “tricks” to compress the data.<\/p>\n

In general, all existing methods for encoding audio information can be conditionally divided into only two types.<\/p>\n

1. Lossless data compression (“Lossless Encoding”) is a method of encoding (compacting) digital audio information, which enables one hundred percent recovery of the original data from the compressed transmission (the term ” original data “here means the original form of the digitized audio data). This method of data compression is used in cases where one hundred percent absolute preservation of the quality of the original audio data is required. Lossless compression algorithms that exist today can reduce the volume of data occupied by 20-50% and at the same time guarantee a 100% recovery of the original digital material from the compressed data. The operating mechanisms of such encoders are similar to the operating mechanisms of general data archivers, such as ZIP or RAR, but at the same time they are specially adapted to compress audio data …. Lossless encoding While it is ideal in terms of preserving the quality of audio materials, it cannot provide a high level of compression.<\/p>\n

2. There is another more modern way to compact data. This so-called lossy data compression (Engl. “Lossy encoding”) The purpose of encoding is to achieve the highest data compression rate by all means while keeping sound quality at an acceptable level. The idea behind lossy encoding is based on two simple underlying considerations:<\/p>\n

original digital audio data is redundant: it contains a lot of unnecessary information that is useless to the ear, which can be removed, thereby increasing the compression ratio;
\nRequirements for the sound quality of audio material may vary and depend on specific purposes and areas of use.
\nLossy encoding is therefore called “lossy”, which results in the loss of some of the audio information. Such encoding leads to the fact that the decoded signal, when reproduced, sounds similar to the original, but in reality it is no longer identical to it. Most lossy coding methods rely on the use of the psychoacoustic properties of the human auditory system, as well as various tricks associated with resampling and resampling the signal. In frequency, during the compression process, the encoder analyzes the audio data to identify various details of the sound that can be ignored. Disguised frequencies, inaudible and inaudible sound details can be sacrificed for a higher compression ratio. Where intelligibility is only important in sound (for example, in telephony, where the presence of frequencies above 4 kHz is not necessary), the audio information during the encoding process undergoes a serious “simplification”, which, together with the use of successful “smart” quantifiers and “greedy” data compression algorithms.<\/p>\n","protected":false},"excerpt":{"rendered":"

Digital audio encoding In fact, one or another digital form of representation of analog audio signals is already a coding method – a sequence of numbers that describes an analog audio signal is itself a digital code. However, the encoding that we are going to talk about now is something else. Now let’s look at … Continue reading “Digital audio encoding”<\/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":[22888,28067,22897,22895,22901,59452,22902,22903,22899,59453,43025,57136,22933,22909,22910,59454,22920,22922,22921,22919,22940,22939,22938,22935,22936,22941,22943,22907,22946,22944,41197,22913,22918,22916,22914,22925,22923,22891,15335,22949,22948,22950,22892,59457,57138,22889,28075,22947,28077,41194,22934,22937,22932,22929,58660,6826,22894,22953,47818,22917,59455,22924,57137,22928,28071,28088,28090,28072,59459,59456,28073,28074,28089,41199,22954,43027,59458,41195,22905,22908,58661,22958,22957,22956,43028,41202,22955,22959,22960,50676],"class_list":["post-3113","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-i-use-digital-audio-cable","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-coaxial-digital-audio","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-do-i-need-digital-audio-cable-with-hdmi","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-does-xbox-one-have-digital-audio","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-better-than-hdmi","tag-is-digital-audio-cable-same-as-rca","tag-is-digital-audio-coaxial","tag-is-digital-audio-good","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-are-digital-audio-formats","tag-what-are-digital-audio-players","tag-what-digital-audio-output","tag-what-do-digital-audio","tag-what-do-digital-audio-mean","tag-what-does-digital-audio-mean","tag-what-does-digital-audio-out-mean","tag-what-does-digital-audio-output-pcm-mean","tag-what-does-digital-audio-output-raw-mean","tag-what-is-digital-audio","tag-what-is-digital-audio-broadcasting","tag-what-is-digital-audio-in-multimedia","tag-what-is-digital-audio-out","tag-what-is-digital-audio-out-on-tv","tag-what-is-digital-audio-out-pcm","tag-what-is-digital-audio-output","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-whats-digital-audio-workstation","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":"\nDigital audio encoding - 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\/digital-audio-encoding-3\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Digital audio encoding - mp4gain.com\" \/>\n<meta property=\"og:description\" content=\"Digital audio encoding In fact, one or another digital form of representation of analog audio signals is already a coding method – a sequence of numbers that describes an analog audio signal is itself a digital code. 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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":"Digital audio encoding - 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\/digital-audio-encoding-3\/","og_locale":"en_US","og_type":"article","og_title":"Digital audio encoding - mp4gain.com","og_description":"Digital audio encoding In fact, one or another digital form of representation of analog audio signals is already a coding method – a sequence of numbers that describes an analog audio signal is itself a digital code. However, the encoding that we are going to talk about now is something else. 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