{"id":316,"date":"2018-01-19T13:39:35","date_gmt":"2018-01-19T13:39:35","guid":{"rendered":"http:\/\/disseny-test.uoc.edu\/materials\/prod-digital\/?page_id=316"},"modified":"2018-01-19T14:42:13","modified_gmt":"2018-01-19T14:42:13","slug":"5-2-5-mp3","status":"publish","type":"page","link":"http:\/\/disseny-test.uoc.edu\/materials\/prod-digital\/5-2-5-mp3\/","title":{"rendered":"5.2.5. MP3"},"content":{"rendered":"<div class=\"featured featured-blue\"><p><a href=\"#_ftn1\" name=\"_ftnref1\"><\/a>\u00a0<a href=\"javascript:void(0);\" class=\"tooltip\" data-toggle=\"popover\" data-placement=\"bottom\" data-content=\"El nom complet \u00e9s MPEG-2 Audio Layer III. MPEG \u00e9s la sigla de Moving Picture Experts Group, l\u2019equip responsable del seu desenvolupament i d\u2019especificar-ne els est\u00e0ndards.\" data-placement=\"top\" data-html=\"true\" ><strong>MP3<\/strong><\/a> \u00e9s un format amb p\u00e8rdua, \u00e9s a dir, que elimina una part de la informaci\u00f3 per assegurar-se de tenir un fitxer d\u2019\u00e0udio lleuger.<\/p>\n<\/div>\n<p>L\u2019algorisme de compressi\u00f3 se suposa que elimina freq\u00fc\u00e8ncies no audibles per humans i comprimeix de manera eficient la resta, de manera que la qualitat de l\u2019\u00e0udio original no es perdria, per\u00f2, com hem comentat en la introducci\u00f3, hi ha una disputa considerable sobre aquest tema.<\/p>\n<h4><strong>Quan cal usar MP3?<\/strong><\/h4>\n<p>MP3 no \u00e9s ni molt menys el sistema de compressi\u00f3 i codificaci\u00f3 m\u00e9s eficient, per\u00f2 \u00e9s sens dubte el m\u00e9s est\u00e8s i m\u00e9s accessible per tot tipus de maquinari o sistemes operatius, de manera que, davant el dubte, \u00e9s l\u2019opci\u00f3 m\u00e9s c\u00f2moda i funcional. \u00c9s un sistema propietari creat per Fraunhofer IIS, i el seu \u00fas en projectes comercials implica el pagament de c\u00e0nons.<\/p>\n<p>Els experts en general recomanen generar MP3 a 44,1 kHz i 128 kbps per a distribuir-lo a internet, ja que ofereix una bona velocitat de desc\u00e0rrega sense comprometre la qualitat de l\u2019\u00e0udio.<\/p>\n<p>Molts distribu\u00efdors de podcasts utilitzen tamb\u00e9 l\u2019MP3 com a format per defecte.<\/p>\n<p>MP3 funciona de manera nativa en HTML 5 amb els navegadors Internet Explorer, Safari i Chrome.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L\u2019algorisme de compressi\u00f3 se suposa que elimina freq\u00fc\u00e8ncies no audibles per humans i comprimeix de manera eficient la resta, de manera que la qualitat de l\u2019\u00e0udio original no es perdria, per\u00f2, com hem comentat en la introducci\u00f3, hi ha una disputa considerable sobre aquest tema. Quan cal usar MP3? MP3 no \u00e9s ni molt menys [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inline_featured_image":false},"acf":[],"_links":{"self":[{"href":"http:\/\/disseny-test.uoc.edu\/materials\/prod-digital\/wp-json\/wp\/v2\/pages\/316"}],"collection":[{"href":"http:\/\/disseny-test.uoc.edu\/materials\/prod-digital\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/disseny-test.uoc.edu\/materials\/prod-digital\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/disseny-test.uoc.edu\/materials\/prod-digital\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/disseny-test.uoc.edu\/materials\/prod-digital\/wp-json\/wp\/v2\/comments?post=316"}],"version-history":[{"count":3,"href":"http:\/\/disseny-test.uoc.edu\/materials\/prod-digital\/wp-json\/wp\/v2\/pages\/316\/revisions"}],"predecessor-version":[{"id":396,"href":"http:\/\/disseny-test.uoc.edu\/materials\/prod-digital\/wp-json\/wp\/v2\/pages\/316\/revisions\/396"}],"wp:attachment":[{"href":"http:\/\/disseny-test.uoc.edu\/materials\/prod-digital\/wp-json\/wp\/v2\/media?parent=316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}