{"id":5612,"date":"2022-08-16T18:37:49","date_gmt":"2022-08-16T18:37:49","guid":{"rendered":"https:\/\/mp4gain.com\/mp4gain\/?p=5612"},"modified":"2022-08-16T18:37:49","modified_gmt":"2022-08-16T18:37:49","slug":"audio-compression-how-it-works","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/mp4gain\/audio-compression-how-it-works\/","title":{"rendered":"Audio compression, how it works"},"content":{"rendered":"

Audio compression, how it works<\/h2>\n
\"Audio
Audio compression<\/figcaption><\/figure>\n

audio compression<\/p>\n

 <\/p>\n

\"audio
audio compression<\/figcaption><\/figure>\n

 <\/p>\n

Audio compression technology refers to the application of suitable digital signal processing technology to the original digital audio signal stream (PCM encoding), without losing the amount of useful information, or under the condition that the loss introduced be insignificant, reduce (compress) its code rate, and also called compression encoding.<\/p>\n

It must have a corresponding inverse transform, called decompression or decoding. The audio signal can introduce a lot of noise and some distortion after passing through a codec system<\/p>\n

Audio compression technology refers to the application of suitable digital signal processing technology to the original digital audio signal stream (PCM encoding), without losing the amount of useful information, or under the condition that the loss introduced insignificant, reducing (compressing) its code rate, and also called compression encoding. It must have a corresponding inverse transform, called decompression or decoding. Audio signals can introduce a great deal of noise and some distortion after passing through a codec system. The advantages of digital signal are obvious, but it also has its own corresponding disadvantages, ie increased storage capacity requirements and increased channel capacity requirements during transmission. Taking a CD as an example, the sampling frequency is 44.1KHz and the quantization precision is 16 bits, so a stereo audio signal for 1 minute needs to occupy about 10M bytes of storage capacity, that is, the capacity of a CD turntable is only about 1 hour. Of course, the problem is even more pronounced in the world of much higher bandwidth digital video. Are all these bits necessary? The study found that there is a large redundancy in the direct use of the PCM code stream for storage and transmission. In fact, sound can be compressed at least 4:1 under lossless conditions, that is, only 25% of the digital amount is used to retain all the information, and the compression ratio in the video field can even reach to several hundred times. Therefore, in order to use limited resources, compression technology has received much attention since its inception. The research and application of audio compression technology has a long history, like A-law coding, u-law is a simple almost instant compression technology, and has been applied in ISDN voice transmission. Research on speech signals has been developed before and has matured, and has been widely used, such as adaptive differential PCM (ADPCM), linear predictive coding (LPC), and other technologies.<\/p>\n","protected":false},"excerpt":{"rendered":"

Audio compression, how it works audio compression     Audio compression technology refers to the application of suitable digital signal processing technology to the original digital audio signal stream (PCM encoding), without losing the amount of useful information, or under the condition that the loss introduced be insignificant, reduce (compress) its code rate, and also … Continue reading “Audio compression, how it works”<\/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":[58258,6596,27903,90481,90485,90484,90482,90480,90483,90489,90488,90486,90487,55305,20945,90493,90491,90492,90490,90498,90494,90500,90496,90495,90497,90499,90506,90502,90504,90503,90505,90511,90510,90507,90508,90509,90514,90513,90512,90521,90520,90518,90516,90517,90519,90515,90524,90522,90523,90525,90526,90527,90535,90534,90532,90533,90543,90537,90540,90539,90536,90542,90538,90541,90545,90546,90547,20965,20937,90549,90548,27907,27924,90551,20941,20993,20992,33001,90555,27908,20991,90552,20990,55692,90591,90554,90553,24534,90501,33003,90556,24589,35707,90550,24550,24558,24555,90557,33000,24554,27905,90638,90639,90478,90562,90563,90564,90566,90567,90568,90569,90565,90570,90571,24596,32998,24595,24594,24591,90577,90575,90576,90578,90579,90580,90582,90586,90585,90583,90581,90584,90588,90589,90587,90477,90593,90594,90592,90598,90596,90597,90595,90601,90599,90600,90603,90602,90604,90610,90611,90606,90607,90609,90605,90608,24600,24623,90619,90617,90616,90618,90621,90620,90572,90574,90573,90622,90623,90624,90625,90626,90629,90627,90628,90631,90633,90634,90632,90630,90635,90636,90637,90640,90641,90642,90644,90643,90645,24647,24649,90648,90647,24551,35705,24646,24645,24651,27951,33004,90649,90650,90651,90615,33356,90475,33405,33391,90612,83673,33402,33401,90529,90528,90530,90531,23848,90646,90590,90479,90558,42858,90544,22170,22167,90561,90613,27886,90614,20277,27914,90476,90559,90560,27901],"class_list":["post-5612","post","type-post","status-publish","format-standard","hentry","category-audio-normalizer","tag-audio-compressed-vs-uncompressed","tag-audio-compression","tag-audio-compression-after-effects","tag-audio-compression-alongside-a-track","tag-audio-compression-alongside-gohans-namekian-mentor","tag-audio-compression-alongside-synonym","tag-audio-compression-alongside-the-audio","tag-audio-compression-alongside-video","tag-audio-compression-alongside-windows-10","tag-audio-compression-amid-definition","tag-audio-compression-amid-stock","tag-audio-compression-amid-the-future","tag-audio-compression-amid-the-war","tag-audio-compression-and-coding","tag-audio-compression-and-decompression","tag-audio-compression-around-me","tag-audio-compression-around-the-house","tag-audio-compression-around-the-neck","tag-audio-compression-around-the-world","tag-audio-compression-as-a-function","tag-audio-compression-as-a-service","tag-audio-compression-as-a-service-dog","tag-audio-compression-as-a-source","tag-audio-compression-as-an-example","tag-audio-compression-as-an-input","tag-audio-compression-as-clean-boost","tag-audio-compression-before-mastering","tag-audio-compression-before-or-after-effects","tag-audio-compression-before-or-after-eq","tag-audio-compression-before-or-after-recording","tag-audio-compression-before-or-after-workout","tag-audio-compression-behind-knee","tag-audio-compression-behind-the-neck","tag-audio-compression-behind-the-scenes","tag-audio-compression-behind-the-voice","tag-audio-compression-behind-the-voice-actors","tag-audio-compression-below-16mb","tag-audio-compression-below-deck","tag-audio-compression-below-zero","tag-audio-compression-beneath-a-scarlet-sky","tag-audio-compression-beneath-my-wings","tag-audio-compression-beneath-the-mask","tag-audio-compression-beneath-the-skin","tag-audio-compression-beneath-the-sky","tag-audio-compression-beneath-the-sun","tag-audio-compression-beneath-the-surface","tag-audio-compression-beside-a-track","tag-audio-compression-beside-a-video","tag-audio-compression-beside-a-youtube-video","tag-audio-compression-beside-me","tag-audio-compression-beside-me-lyrics","tag-audio-compression-besides-water","tag-audio-compression-beyond-coupon","tag-audio-compression-beyond-the-boundary","tag-audio-compression-beyond-the-edge","tag-audio-compression-beyond-the-horizon","tag-audio-compression-but-burns-oil","tag-audio-compression-but-no-audio","tag-audio-compression-but-no-input","tag-audio-compression-but-no-output","tag-audio-compression-but-no-sound","tag-audio-compression-but-no-start","tag-audio-compression-but-no-video","tag-audio-compression-but-wont-start","tag-audio-compression-circa-lighting","tag-audio-compression-circa-survive","tag-audio-compression-come-from","tag-audio-compression-comparison","tag-audio-compression-definition","tag-audio-compression-despite-definition","tag-audio-compression-despite-synonym","tag-audio-compression-down","tag-audio-compression-examples","tag-audio-compression-except-one","tag-audio-compression-explained","tag-audio-compression-final-cut-pro-x","tag-audio-compression-for-dummies","tag-audio-compression-for-gaming","tag-audio-compression-for-iphone","tag-audio-compression-for-live-streaming","tag-audio-compression-for-podcast","tag-audio-compression-for-tarkov","tag-audio-compression-for-tv","tag-aud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