{"id":28553,"date":"2016-09-08T15:11:14","date_gmt":"2016-09-08T14:11:14","guid":{"rendered":"https:\/\/voipstudio.com\/blog\/czym-sa-kodeki-voip-2\/"},"modified":"2025-12-11T17:16:46","modified_gmt":"2025-12-11T17:16:46","slug":"czym-sa-kodeki-voip","status":"publish","type":"post","link":"https:\/\/voipstudio.com\/pl\/blog\/czym-sa-kodeki-voip\/","title":{"rendered":"Czym s\u0105 kodeki VoIP i dlaczego maj\u0105 znaczenie ?"},"content":{"rendered":"<p>Jednym z powod\u00f3w, dla kt\u00f3rych ludzie i firmy cz\u0119sto zwlekaj\u0105 z przej\u015bciem na najnowsz\u0105 technologi\u0119, jest trudno\u015b\u0107 w nauce i zrozumieniu technicznego \u017cargonu. W przypadku konsument\u00f3w brak wiedzy technicznej nie stanowi bariery w rzeczywistym korzystaniu z nowych produkt\u00f3w lub us\u0142ug. Na przyk\u0142ad niewiele os\u00f3b rozumie protoko\u0142y HTTP lub SMTP, ale potrafi\u0105 bez problemu korzysta\u0107 z Internetu i wysy\u0142a\u0107 wiadomo\u015bci e-mail. Tego samego nie mo\u017cna jednak powiedzie\u0107 o organizacjach, kt\u00f3re zamierzaj\u0105 korzysta\u0107 z tych technologii.<\/p>\n<p>Firma, kt\u00f3ra chce przej\u015b\u0107 na VoIP, mo\u017ce po prostu zakupi\u0107 us\u0142ugi hostowane i zadzwoni\u0107 do nich na jeden dzie\u0144. Jednak odblokowanie zaawansowanych funkcji i pe\u0142nego potencja\u0142u VoIP wymaga przynajmniej podstawowego zrozumienia podstawowej technologii, protoko\u0142\u00f3w i sposobu jej dzia\u0142ania. Oczywi\u015bcie nie ka\u017cdy pracownik w organizacji potrzebuje tej wiedzy, ale mened\u017cerowie i personel odpowiedzialny za jej wdro\u017cenie musz\u0105 zna\u0107 podstawowe elementy.<\/p>\n<h2><span class=\"VIiyi\" lang=\"pl\"><span class=\"JLqJ4b ChMk0b\" data-language-for-alternatives=\"pl\" data-language-to-translate-into=\"en\" data-phrase-index=\"0\">Czym jest kodek VoIP?<\/span><\/span><\/h2>\n<p>Podstawowym elementem infrastruktury sieci VoIP jest skromny kodek. Kodeki to algorytmy (lub pro\u015bciej m\u00f3wi\u0105c, programy), kt\u00f3re s\u0105 wykorzystywane w wielu przypadkach, w tym do edycji audio i wideo, przechwytywania film\u00f3w, przesy\u0142ania strumieniowego wideo, oprogramowania szyfruj\u0105cego itp. W przypadku VoIP kodeki pe\u0142ni\u0105 wa\u017cn\u0105 funkcj\u0119 \u2013 umo\u017cliwiaj\u0105 konwersj\u0119 analogowe sygna\u0142y g\u0142osowe w pakiety cyfrowe, kt\u00f3re mo\u017cna przesy\u0142a\u0107 przez Internet.<\/p>\n<p>Kodeki mo\u017cna instalowa\u0107 na komputerach tak samo, jak zwyk\u0142e oprogramowanie, ale cz\u0119\u015bciej s\u0105 one wbudowane w sprz\u0119t sprz\u0119towy, taki jak ATA, telefony VoIP itp. W wi\u0119kszo\u015bci przypadk\u00f3w u\u017cytkownik ko\u0144cowy nie musi wiedzie\u0107 o konkretnym typie u\u017cywanego kodeka lub jego funkcji. Je\u015bli jednak do konkretnej sytuacji lub przypadku u\u017cycia zostanie wybrany niew\u0142a\u015bciwy kodek, jako\u015b\u0107 g\u0142osu mo\u017ce si\u0119 szybko pogorszy\u0107 \u2013 zw\u0142aszcza gdy sie\u0107 jest przeci\u0105\u017cona, a przepustowo\u015b\u0107 jest ograniczona.<\/p>\n<h2><span class=\"VIiyi\" lang=\"pl\"><span class=\"JLqJ4b ChMk0b\" data-language-for-alternatives=\"pl\" data-language-to-translate-into=\"en\" data-phrase-index=\"0\">Co robi kodek?<\/span><\/span><\/h2>\n<p><span class=\"VIiyi\" lang=\"pl\"><span class=\"JLqJ4b ChMk0b\" data-language-for-alternatives=\"pl\" data-language-to-translate-into=\"en\" data-phrase-index=\"0\">Teoretycznie kodeki mog\u0105 pe\u0142ni\u0107 trzy funkcje:<\/span><\/span><\/p>\n<ul>\n<li><span class=\"VIiyi\" lang=\"pl\"><span class=\"JLqJ4b ChMk0b\" data-language-for-alternatives=\"pl\" data-language-to-translate-into=\"en\" data-phrase-index=\"0\">Kodowanie i dekodowanie<\/span><\/span><\/li>\n<li><span class=\"VIiyi\" lang=\"pl\"><span class=\"JLqJ4b ChMk0b\" data-language-for-alternatives=\"pl\" data-language-to-translate-into=\"en\" data-phrase-index=\"0\">Kompresja i dekompresja<\/span><\/span><\/li>\n<li><span class=\"VIiyi\" lang=\"pl\"><span class=\"JLqJ4b ChMk0b\" data-language-for-alternatives=\"pl\" data-language-to-translate-into=\"en\" data-phrase-index=\"0\">Szyfrowanie i deszyfrowanie<\/span><\/span><\/li>\n<\/ul>\n<p>Kodeki VoIP generalnie realizuj\u0105 pierwsze dwa i bardzo rzadko zdarza si\u0119, aby dany kodek wykonywa\u0142 wszystkie trzy funkcje jednocze\u015bnie. Jednym z element\u00f3w pracy kodeka jest konwersja ludzkiego g\u0142osu na zdigitalizowane pakiety, kt\u00f3re mog\u0105 by\u0107 przesy\u0142ane przez Internet, tak jak ka\u017cda inna forma medi\u00f3w. Te pakiety g\u0142osowe mog\u0105 by\u0107 oznaczone z wy\u017cszym priorytetem poprzez ustawienia QoS, aby umo\u017cliwi\u0107 im szybsze przechodzenie przez zapory sieciowe lub inny sprz\u0119t graniczny. Cz\u0119sto jest to konieczne, aby zapewni\u0107, \u017ce d\u017awi\u0119k nie zostanie przerwany podczas po\u0142\u0105cze\u0144. Je\u015bli chodzi o ten aspekt, wi\u0119kszo\u015b\u0107 kodek\u00f3w VoIP wykonuje to zadanie odpowiednio.<\/p>\n<p>G\u0142\u00f3wna r\u00f3\u017cnica mi\u0119dzy r\u00f3\u017cnymi typami kodek\u00f3w VoIP u\u017cywanych przez dostawc\u00f3w wynika ze sposobu kompresji d\u017awi\u0119ku. Dlaczego przede wszystkim d\u017awi\u0119k musi by\u0107 skompresowany? Dzieje si\u0119 tak, poniewa\u017c przesy\u0142anie d\u017awi\u0119ku wymaga du\u017cej przepustowo\u015bci. Przepustowo\u015b\u0107 mo\u017ce by\u0107 rzadkim lub drogim towarem dla organizacji, a kompresja pozwala zaoszcz\u0119dzi\u0107 sporo miejsca. Wydajna kompresja wymaga <a href=\"http:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/voice\/voice-quality\/7934-bwidth-consume.html\">mniejszej przepustowo\u015bci<\/a> i mo\u017ce to wp\u0142yn\u0105\u0107 na planowanie zdolno\u015bci produkcyjnych i d\u0142ugoterminowe inwestycje firmy.<\/p>\n<h2><span class=\"VIiyi\" lang=\"pl\"><span class=\"JLqJ4b ChMk0b\" data-language-for-alternatives=\"pl\" data-language-to-translate-into=\"en\" data-phrase-index=\"0\">Kompromis mi\u0119dzy kompresj\u0105 a jako\u015bci\u0105<\/span><\/span><\/h2>\n<p>Istnieje odwrotna zale\u017cno\u015b\u0107 mi\u0119dzy ilo\u015bci\u0105 wykonanej kompresji a jako\u015bci\u0105 d\u017awi\u0119ku. Im wi\u0119ksza kompresja, tym ni\u017csza jako\u015b\u0107 wynikowego strumienia lub pliku. Dotyczy to wi\u0119kszo\u015bci konwersji (pomi\u0119dzy plikami, formatami lub kontenerami multimedialnymi), a zw\u0142aszcza VoIP. Na przyk\u0142ad pliki audio MP3 to skompresowane pliki, kt\u00f3re trac\u0105 sporo danych z orygina\u0142u. Jednak uzyskana klarowno\u015b\u0107 jest wystarczaj\u0105ca dla wi\u0119kszo\u015bci ludzi, stanowi\u0105c akceptowalny kompromis mi\u0119dzy oszcz\u0119dno\u015bci\u0105 miejsca a jako\u015bci\u0105 d\u017awi\u0119ku.<br \/>\nPodobnie niekt\u00f3re kodeki VoIP zachowuj\u0105 oryginaln\u0105 jako\u015b\u0107 sygna\u0142\u00f3w g\u0142osowych, ale wymagaj\u0105 wi\u0119kszej przepustowo\u015bci i\/lub mocy procesora. Z drugiej strony istniej\u0105 inne kodeki, kt\u00f3re wykorzystuj\u0105 siln\u0105 kompresj\u0119, aby zaoszcz\u0119dzi\u0107 przepustowo\u015b\u0107. Jest to g\u0142\u00f3wny pow\u00f3d, dla kt\u00f3rego wa\u017cne staje si\u0119 om\u00f3wienie, kt\u00f3rego kodeka nale\u017cy u\u017cy\u0107. Wiele kodek\u00f3w zosta\u0142o opracowanych specjalnie dla okre\u015blonych przypadk\u00f3w u\u017cycia i u\u017cywanie ich w niew\u0142a\u015bciwych okoliczno\u015bciach mo\u017ce by\u0107 b\u0142\u0119dem.<\/p>\n<p>Zwykle, gdy jako\u015b\u0107 d\u017awi\u0119ku jest dobra, organizacje rzadko musz\u0105 zawraca\u0107 sobie g\u0142ow\u0119 tym, kt\u00f3ry kodek jest u\u017cywany przez dostawc\u0119. Je\u015bli jednak ich sie\u0107 jest odpowiednio zoptymalizowana, a wszystkie inne aspekty systemu s\u0105 poprawnie skonfigurowane, ale jako\u015b\u0107 jest nadal z\u0142a, przyczyn\u0105 mo\u017ce by\u0107 wdro\u017cony kodek. Dlatego wi\u0119kszo\u015b\u0107 firm rzadko ma pomys\u0142 lub pyta o konkretny kodek u\u017cywany przed zakupem us\u0142ug. Troch\u0119 przezorno\u015bci podczas badania i por\u00f3wnywania dostawc\u00f3w mo\u017ce zaoszcz\u0119dzi\u0107 wiele k\u0142opot\u00f3w w przysz\u0142o\u015bci.<\/p>\n<h2><span class=\"VIiyi\" lang=\"pl\"><span class=\"JLqJ4b ChMk0b\" data-language-for-alternatives=\"pl\" data-language-to-translate-into=\"en\" data-phrase-index=\"0\">Kt\u00f3rego kodeka u\u017cy\u0107?<\/span><\/span><\/h2>\n<p>Niestety, nie ma idealnego kodeka, kt\u00f3ry by\u0142by akceptowalny dla wszystkich przedsi\u0119biorstw w ka\u017cdych okoliczno\u015bciach. Niekt\u00f3re kodeki wysokiej jako\u015bci wymagaj\u0105 op\u0142at licencyjnych, podczas gdy inne s\u0105 open source, niekt\u00f3re oferuj\u0105 lepsz\u0105 jako\u015b\u0107, podczas gdy inne zu\u017cywaj\u0105 mniej przepustowo\u015bci. Wszystkie te aspekty b\u0119d\u0105 mia\u0142y wp\u0142yw na ostateczny wyb\u00f3r kodeka przez dostawc\u0119, klienta lub organizacj\u0119.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Jednym z powod\u00f3w, dla kt\u00f3rych ludzie i firmy cz\u0119sto zwlekaj\u0105 z przej\u015bciem na najnowsz\u0105 technologi\u0119, jest trudno\u015b\u0107 w nauce i zrozumieniu technicznego [&hellip;]<\/p>\n","protected":false},"author":16,"featured_media":37288,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[293],"tags":[],"class_list":["post-28553","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologia-i-innowacje"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Czym s\u0105 kodeki VoIP i dlaczego maj\u0105 znaczenie ? 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