{"id":1817,"date":"2020-09-01T00:05:41","date_gmt":"2020-09-01T00:05:41","guid":{"rendered":"http:\/\/mp4gain.com\/mp4gain\/?p=1817"},"modified":"2020-09-01T00:05:41","modified_gmt":"2020-09-01T00:05:41","slug":"sample-rate-and-bit-depth-2","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/mp4gain\/sample-rate-and-bit-depth-2\/","title":{"rendered":"Sample rate and bit depth"},"content":{"rendered":"<p>The comparison with the digital or film camera is not completely random: the sampling frequency of the audio signals, that is, the frequency of the samples per unit of time (usually given per second), is comparable to the frame rate per second from a film camera. The number of pixels in each individual image could be equated with the bit depth: HD movies &#8220;look better&#8221; than Super 8 movies. The higher the number of pixels on the sensor and the more often a photo is taken, more precisely, the \u201clight to be recorded\u201d, the landscape, can be digitally reproduced.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/www.presonus.com\/uploads\/news\/media\/images\/sample_rate_and_bit_depth_fig1_450.png\" alt=\"Bit Depth\" width=\"450\" height=\"206\" \/><\/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\/sample-rate-and-bit-depth-2\/#Bit_depth\" >Bit depth<\/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\/sample-rate-and-bit-depth-2\/#digital_audio\" >digital audio<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mp4gain.com\/mp4gain\/sample-rate-and-bit-depth-2\/#PCM_pulse_code_modulation_method\" >PCM pulse code modulation method<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Bit_depth\"><\/span>Bit depth<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Fortunately for us, a certain Harry Nyquist inspired a certain Claude Shannon long ago to support him with a theorem (a theoretical statement or theorem) that stated that an audio signal at twice the frequency must be sampled uniformly to match. with the original signal. to be able to rebuild sufficiently. Limiting the bandwidth of audible frequencies practically frees us from our hearing, which is basically only capable of consciously perceiving frequencies between a maximum of 20 Hz and 20,000 Hz.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/magroove.com\/blog\/wp-content\/uploads\/2019\/06\/sample-rate.jpg\" alt=\"Sample rate\" width=\"600\" height=\"335\" \/><\/p>\n<p>The expense of completely and exactly reconstructing the analog output signal is theoretically infinite, since digital signals are discontinuous by nature in any case, while analog signals are always continuous. Unfortunately, it is inevitable that digital information is only suitable for rough storage of analog signals. The starting signal is &#8220;rough&#8221;, good word, right? Nyquist&#8217;s theorem also applies to digital cameras: they also deal with frequencies, that is, those of light.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"digital_audio\"><\/span>digital audio<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>For signals up to 20 kHz more or less relevant to humans, a sampling frequency of 40 kHz is sufficient according to the aforementioned theorem. The 44.1 kHz sample rate common for CD quality comes from the 1970s or Sony&#8217;s \u201cpulse code modulation (PCM) process for storing digital signals on video tapes. Later, Sony developed the Red Book standard for audio CDs with Philips.<\/p>\n<p>The frequency, which is slightly wider by an additional 4000 Hz than twice that audible to humans, has its origin in the simplest possible filters, which are intended to remove so-called aliasing effects from the audible range of the reconstructed analog signal. during digitization: the wider this &#8220;corridor&#8221;, the simpler the filter technology.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"PCM_pulse_code_modulation_method\"><\/span>PCM pulse code modulation method<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Exactly 44.1 kHz got out of this, because sample rate converters can be more easily designed (used for studio technology or data carrier transfer) if the sample rate is an integer multiple of the output frequency. The output frequency here was the 60 Hz network frequency used for video digitization with 525 lines to digitize the TV signal. Changing 60 Hz would have been very laborious, it stuck. It is not a coincidence that multiplying 525 by an integer factor results in a frequency greater than 44,000 Hz, which we want to achieve to keep filters for anti-aliasing simple: the next largest integer that is divisible by 525 is 44,100. The multiplication factor is 84, as a whole number is desired, which should not interest us otherwise.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The comparison with the digital or film camera is not completely random: the sampling frequency of the audio signals, that is, the frequency of the samples per unit of time (usually given per second), is comparable to the frame rate per second from a film camera. The number of pixels in each individual image could &hellip; <a href=\"https:\/\/mp4gain.com\/mp4gain\/sample-rate-and-bit-depth-2\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Sample rate and bit depth&#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":[1],"tags":[27453,37891,37893,37892,37896,37898,37806,37809,37807,41323,37801,37805,37815,37803,37826,37823,37825,37802,41307,37798,41310,37829,37835,37897,41311,37838,37799,37848,37858,37861,37859,37860,41319,37876,37862,37816,37800,37813,37820,38243,37830,37840,37850,37873,37872,37895,41309,41320,37818,37890,37808,37822,37837,41308,37843,41316,41318,27344,27269,37878,37882,41321,41322,18693,18723,41315,37856,37867,20825,37870,37885,37821,37817,37819,37827,37828,37852,37868,37834,37833,37814,37831,37836,41312,37841,37844,37810,37846,37845,41313,37847,37849,37855,37854,41317,37866,37864,37865,37875,37874,41314,9258,9266,37881,37880,37879,37871,37884,37886,37811,37887,37888,37889],"class_list":["post-1817","post","type-post","status-publish","format-standard","hentry","category-audio-video","tag-16-bit-depth-audio","tag-24-bit-audio-bit-depth","tag-24-bit-depth","tag-24-bit-depth-audio","tag-64-bit-depth-audio","tag-8-bit-depth-audio","tag-aac-audio-bit-depth","tag-ableton-export-audio-bit-depth","tag-android-audio-bit-depth","tag-audio-32-bit-depth","tag-audio-bit-depth-16-or-24","tag-audio-bit-depth-and-sample-rate","tag-audio-bit-depth-best","tag-audio-bit-depth-calculator","tag-audio-bit-depth-codec","tag-audio-bit-depth-comparison","tag-audio-bit-depth-compressed","tag-audio-bit-depth-conversion","tag-audio-bit-depth-converter","tag-audio-bit-depth-definition","tag-audio-bit-depth-dsp","tag-audio-bit-depth-dynamic-range","tag-audio-bit-depth-explained","tag-audio-bit-depth-fcp-7","tag-audio-bit-depth-ffmpeg","tag-audio-bit-depth-files","tag-audio-bit-depth-for-video","tag-audio-bit-depth-in-sound","tag-audio-bit-depth-latency","tag-audio-bit-depth-mastering","tag-audio-bit-depth-meaning","tag-audio-bit-depth-mixing","tag-audio-bit-depth-rates","tag-audio-bit-depth-sampling-rate","tag-audio-bit-depth-to-mp3","tag-audio-bit-depth-vs-bit-rate","tag-audio-bit-depth-vs-sample-rate","tag-audio-bit-resolution","tag-audio-bitrate-vs-bit-depth","tag-audio-card-bit-depth","tag-audio-driver-bit-depth","tag-audio-format-bit-depth","tag-audio-interface-bit-depth","tag-audio-playback-bit-depth","tag-audio-player-bit-depth","tag-audio-sample-rate-and-bit-depth","tag-audio-sample-rate-and-bit-depth-for-video","tag-audio-sampling-bit-depth","tag-best-audio-bit-depth-sampling-rate","tag-bit-depth-24-audio","tag-bit-depth-and-audio","tag-bit-depth-audio-bitrate","tag-bit-depth-audio-example","tag-bit-depth-audio-in-audacity","tag-bit-depth-audio-la-gi","tag-bit-depth-audio-levels","tag-bit-depth-audio-output","tag-bit-depth-audio-pro-tools","tag-bit-depth-audio-recording","tag-bit-depth-audio-render","tag-bit-depth-audio-signal","tag-bit-depth-audio-tutorial","tag-bit-depth-audio-wiki","tag-bit-depth-for-audio","tag-bit-depth-in-audio","tag-bit-depth-in-audio-recording","tag-bit-depth-laptop-audio","tag-bit-depth-no-audio","tag-bit-depth-of-audio","tag-bit-depth-of-digital-audio","tag-bit-depth-test-audio","tag-blu-ray-audio-bit-depth","tag-bluetooth-audio-bit-depth","tag-broadcast-audio-bit-depth","tag-cd-audio-bit-depth","tag-change-audio-bit-depth","tag-change-bit-depth-in-audio","tag-check-bit-depth-of-audio-file","tag-davinci-resolve-audio-bit-depth","tag-detect-audio-bit-depth","tag-digital-audio-bit-depth","tag-dvd-audio-bit-depth","tag-export-audio-bit-depth","tag-ffprobe-audio-bit-depth","tag-film-audio-bit-depth","tag-highest-audio-bit-depth","tag-how-does-bit-depth-affect-audio-quality","tag-how-to-change-audio-bit-depth-in-avid","tag-how-to-check-audio-bit-depth","tag-how-to-reduce-audio-bit-depth","tag-how-to-set-audio-bit-depth","tag-iphone-audio-bit-depth","tag-know-bit-depth-audio","tag-linux-jack-audio-bit-depth","tag-m-audio-fast-track-bit-depth","tag-m-audio-mobilepre-bit-depth","tag-mediainfo-audio-bit-depth","tag-music-audio-bit-depth","tag-pengertian-bit-depth-audio","tag-pengertian-bit-depth-pada-audio","tag-realtek-high-definition-audio-bit-depth","tag-sample-rate-and-bit-depth","tag-sample-rate-and-bit-depth-audio","tag-sdi-audio-bit-depth","tag-spotify-audio-bit-depth","tag-standard-audio-bit-depth","tag-the-bit-depth-of-an-audio-system-dictates","tag-typical-audio-bit-depth","tag-understanding-audio-bit-depth","tag-web-audio-api-bit-depth","tag-what-is-audio-bit-depth","tag-windows-10-audio-bit-depth","tag-youtube-audio-bit-depth"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - 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