{"id":8498,"date":"2016-09-21T09:00:40","date_gmt":"2016-09-21T14:00:40","guid":{"rendered":"https:\/\/www.servimatango.com\/blog\/?p=8498"},"modified":"2019-06-07T09:28:25","modified_gmt":"2019-06-07T14:28:25","slug":"principios-y-tecnicas-de-codificacion","status":"publish","type":"post","link":"https:\/\/servervoip.com\/blog\/principios-y-tecnicas-de-codificacion\/","title":{"rendered":"Principios y t\u00e9cnicas de codificaci\u00f3n"},"content":{"rendered":"<p>Las aplicaciones audio en una red conllevan dos aspectos distintos, a saber, la digitalizaci\u00f3n y codificaci\u00f3n de los datos audio y el empaquetado de los datos para su transmisi\u00f3n por la red. La codificaci\u00f3n de audio se utiliza para transformar la se\u00f1al vocal anal\u00f3gica en una se\u00f1al digital de determinada velocidad binaria y calidad.<\/p>\n<p>La primera operaci\u00f3n de codificaci\u00f3n es el muestreo de la se\u00f1al anal\u00f3gica a una cierta frecuencia de muestreo y con una determinada precisi\u00f3n, que viene dada por el n\u00famero de bits que se emplean para codificar la amplitud de cada muestra. <\/p>\n<p>Evidentemente la selecci\u00f3n de la frecuencia y el n\u00famero de bits entra\u00f1a una relaci\u00f3n de equilibrio entre la velocidad binaria y la calidad de la se\u00f1al codificada. Cuanto mayor sea la calidad deseada, mayor velocidad binaria se obtendr\u00e1 por muestreo.<\/p>\n<p>Seg\u00fan el teorema de muestreo, una se\u00f1al anal\u00f3gica puede reconstruirse a partir de las muestras digitalizadas si la frecuencia de muestreo es al menos el doble de la anchura de banda de la se\u00f1al original. <\/p>\n<p>El o\u00eddo humano es capaz de percibir la gama de frecuencias comprendida entre 20 Hz y 20 kHz aproximadamente, es decir, una anchura de banda de 20 kHz. El algoritmo de codificaci\u00f3n m\u00e1s sencillo consiste simplemente en muestrear la se\u00f1al anal\u00f3gica y cuantificar las muestras (es decir, convertir los valores reales en valores de precisi\u00f3n finita). <\/p>\n<p>Este tipo de codificaci\u00f3n, denominado modulaci\u00f3n por impulsos codificados (PCM) que se especifica en la Recomendaci\u00f3n UIT-T G.721, se utiliza para codificar la voz en la red telef\u00f3nica. Dado que la anchura de banda de un par trenzado es de unos 3,5 kHz, la frecuencia de muestreo que se emplea es de 8 kHz, para aplicar el teorema de muestreo. Para la cuantificaci\u00f3n se emplea una escala logar\u00edtmica de 8 bits, que es equivalente a una cuantificaci\u00f3n lineal de 13 bits.<\/p>\n<p>Tomado de: https:\/\/www.itu.int\/ITU-D\/cyb\/publications\/2003\/IP-tel_report-es.pdf<\/p>\n<p>\n<div id=\"rev_slider_3_1_wrapper\" class=\"rev_slider_wrapper fullwidthbanner-container\" style=\"float:left;background-color:#E9E9E9;padding:0px;margin-left:0px;margin-right:0px;margin-top:0px;margin-bottom:0px;\">\n<!-- START REVOLUTION SLIDER 5.0.9 auto mode -->\n\t<div id=\"rev_slider_3_1\" class=\"rev_slider fullwidthabanner\" style=\"display:none;\" data-version=\"5.0.9\">\n<ul>\t<!-- SLIDE  -->\n\t<li data-index=\"rs-28\" data-transition=\"random\" data-slotamount=\"7\"  data-easein=\"default\" data-easeout=\"default\" data-masterspeed=\"300\"  data-thumb=\"\"  data-rotate=\"0\"  data-saveperformance=\"off\"  class=\"voipswitch videos subtitulos\" id=\"voipswitch videos subtitulos\" voipswitch videos subtitulos data-title=\"SubtitulosTexto\" data-description=\"\">\n\t\t<!-- MAIN IMAGE -->\n\t\t<img src=\"https:\/\/servervoip.com\/blog\/wp-content\/plugins\/revslider\/admin\/assets\/images\/dummy.png\"  alt=\"\"  width=\"879\" height=\"51\" data-lazyload=\"https:\/\/servervoip.com\/blog\/wp-content\/plugins\/revslider\/admin\/assets\/images\/transparent.png\" data-bgposition=\"center top\" data-bgfit=\"cover\" data-bgrepeat=\"no-repeat\" class=\"rev-slidebg\" data-no-retina>\n\t\t<!-- LAYERS -->\n\n\t\t<!-- LAYER NR. 1 -->\n\t\t<div class=\"tp-caption   tp-resizeme\" \n\t\t\t id=\"slide-28-layer-2\" \n\t\t\t data-x=\"\" \n\t\t\t data-y=\"1\" \n\t\t\t\t\t\tdata-width=\"['none','none','none','none']\"\n\t\t\tdata-height=\"['none','none','none','none']\"\n\t\t\tdata-transform_idle=\"o:1;\"\n \n\t\t\t data-transform_in=\"opacity:0;s:300;e:Power2.easeInOut;\" \n\t\t\t data-transform_out=\"opacity:0;s:300;s:300;\" \n\t\t\tdata-start=\"500\" \n\t\t\tdata-responsive_offset=\"on\" \n\n\t\t\t\n\t\t\tstyle=\"z-index: 5;\">\n\t\t\t\t<div class=\"rs-looped disabled\" ><img src=\"https:\/\/servervoip.com\/blog\/wp-content\/plugins\/revslider\/admin\/assets\/images\/dummy.png\" alt=\"\" data-ww=\"879\" data-hh=\"51\" data-lazyload=\"https:\/\/www.servervoip.com\/blog\/wp-content\/uploads\/2015\/10\/fondo-en-degradado-con-signod-copia.jpg\" data-no-retina> \n\t\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t<!-- LAYER NR. 2 -->\n\t\t<div class=\"tp-caption mediumbgorange   tp-resizeme\" \n\t\t\t id=\"slide-28-layer-1\" \n\t\t\t data-x=\"6\" \n\t\t\t data-y=\"5\" \n\t\t\t\t\t\tdata-width=\"['653']\"\n\t\t\tdata-height=\"['41']\"\n\t\t\tdata-transform_idle=\"o:1;\"\n \n\t\t\t data-transform_in=\"opacity:0;s:300;e:Power3.easeInOut;\" \n\t\t\t data-transform_out=\"auto:auto;s:300;\" \n\t\t\tdata-start=\"500\" \n\t\t\tdata-splitin=\"none\" \n\t\t\tdata-splitout=\"none\" \n\t\t\tdata-responsive_offset=\"on\" \n\n\t\t\t\n\t\t\tstyle=\"z-index: 6; 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style=\"display:none;\" data-version=\"5.0.9\">\n<ul>\t<!-- SLIDE  -->\n\t<li data-index=\"rs-15\" data-transition=\"random\" data-slotamount=\"7\"  data-easein=\"default\" data-easeout=\"default\" data-masterspeed=\"300\"  data-link=\"http:\/\/www.servervoip.com\/voipswitch-comprar.php?server=50_promo\"  data-target=\"_blank\"  data-slideindex=\"back\" data-thumb=\"https:\/\/servervoip.com\/blog\/wp-content\/uploads\/2015\/10\/fondo-slider-con-letras31-100x50.jpg\"  data-rotate=\"0\"  data-saveperformance=\"off\"  data-title=\"Slide\" data-description=\"\">\n\t\t<!-- MAIN IMAGE -->\n\t\t<img src=\"https:\/\/servervoip.com\/blog\/wp-content\/plugins\/revslider\/admin\/assets\/images\/dummy.png\"  alt=\"\"  width=\"879\" height=\"262\" data-lazyload=\"https:\/\/servervoip.com\/blog\/wp-content\/uploads\/2015\/10\/fondo-slider-con-letras31.jpg\" data-bgposition=\"center top\" data-bgfit=\"cover\" data-bgrepeat=\"no-repeat\" class=\"rev-slidebg\" data-no-retina>\n\t\t<!-- LAYERS 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data-index=\"rs-14\" data-transition=\"random\" data-slotamount=\"7\"  data-easein=\"default\" data-easeout=\"default\" data-masterspeed=\"300\"  data-thumb=\"https:\/\/servervoip.com\/blog\/wp-content\/uploads\/2015\/10\/fondo-en-slider2-100x50.jpg\"  data-rotate=\"0\"  data-saveperformance=\"off\"  data-title=\"Slide\" data-description=\"\">\n\t\t<!-- MAIN IMAGE -->\n\t\t<img src=\"https:\/\/servervoip.com\/blog\/wp-content\/plugins\/revslider\/admin\/assets\/images\/dummy.png\"  alt=\"\"  width=\"900\" height=\"268\" data-lazyload=\"https:\/\/servervoip.com\/blog\/wp-content\/uploads\/2015\/10\/fondo-en-slider2.jpg\" data-bgposition=\"center top\" data-bgfit=\"cover\" data-bgrepeat=\"no-repeat\" class=\"rev-slidebg\" data-no-retina>\n\t\t<!-- LAYERS -->\n\n\t\t<!-- LAYER NR. 1 -->\n\t\t<div class=\"tp-caption   tp-resizeme\" \n\t\t\t id=\"slide-14-layer-1\" \n\t\t\t data-x=\"104\" \n\t\t\t data-y=\"52\" 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height=\"262\" data-lazyload=\"https:\/\/servervoip.com\/blog\/wp-content\/uploads\/2015\/10\/fondo-slider-con-letras52.jpg\" data-bgposition=\"center top\" data-bgfit=\"cover\" data-bgrepeat=\"no-repeat\" class=\"rev-slidebg\" data-no-retina>\n\t\t<!-- LAYERS -->\n\t<\/li>\n\t<!-- SLIDE  -->\n\t<li data-index=\"rs-18\" data-transition=\"random\" data-slotamount=\"7\"  data-easein=\"default\" data-easeout=\"default\" data-masterspeed=\"300\"  data-link=\"http:\/\/www.serverpbx.com\/central-telefonica-pagos.php\"   data-slideindex=\"back\" data-thumb=\"https:\/\/servervoip.com\/blog\/wp-content\/uploads\/2015\/10\/fondo-slider-con-letras61-100x50.jpg\"  data-rotate=\"0\"  data-saveperformance=\"off\"  data-title=\"Slide\" data-description=\"\">\n\t\t<!-- MAIN IMAGE -->\n\t\t<img src=\"https:\/\/servervoip.com\/blog\/wp-content\/plugins\/revslider\/admin\/assets\/images\/dummy.png\"  alt=\"\"  width=\"879\" height=\"262\" 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src=\"https:\/\/www.servimatango.com\/blog\/wp-content\/uploads\/2015\/08\/tarjeta1-292x300.png\" alt=\"empresario\" width=\"292\" height=\"300\" class=\"aligncenter size-medium wp-image-4092\" \/><\/a><br \/>\n[st_button button_text=\u00bb SOLICITA TU SERVER AHORA \u25ba\u00bb button_type_url=\u00bbhttp:\/\/www.servervoip.com\/voipswitch-comprar.php?server=50_promo\u00bb open_in=\u00bbnew_window\u00bb icon=\u00bbfa fa-shopping-cart\u00bb button_alignment=\u00bbcenter\u00bb button_margin_top=\u00bb-50&#8243; button_margin_bottom=\u00bb-20&#8243; button_size=\u00bbbtn-lg\u00bb button_color=\u00bbbtn-blue\u00bb appearing_animation=\u00bbfade_in\u00bb wrapper_padding_top=\u00bb0&#8243; wrapper_padding_left=\u00bb0&#8243; wrapper_padding_bottom=\u00bb0&#8243; wrapper_padding_right=\u00bb0&#8243; wrapper_bg_opacity_slider=\u00bb\u00bb id_wrapper=\u00bbelm_5c828b101daf9&#8243; ][\/st_button]<br \/>\n&nbsp;<\/p>\n<p><strong>ServerVoip <\/strong>presenta el mejor server fisico dedicado para telefonia voip que incluye el software de telefon\u00eda ip \u00abVoipSwitch\u00bb especial para voz sobre ip.<\/p>\n<p><strong>VoipSwitch <\/strong>es la plataforma ideal para que sin necesidad de conocimientos t\u00e9cnicos crees tu propia empresa de Telefon\u00eda IP VoIP y encuentres una forma de ganar DINERO en la red siendo carrier de telefon\u00eda sobre Ip (Voip). <\/p>\n<p>Te brindamos todas las herramientas para que est\u00e9s al nivel de las grandes empresas y negocios; puedas obsequiar llamadas gratis como estrategia de marketing en fidelizaci\u00f3n a tus clientes \/ free entre tus clientes; el servidor VoIP te permite utilizar m\u00faltiples proveedores como nosotros tenemos <a href=\"http:\/\/www.alosip.com\/\" target=\"_blank\"  rel=\"noopener noreferrer\">www.alosip.com.<\/a>  (carrier \/ routes) para un mismo destino, vender terminaci\u00f3n (wholesale), clientes finales (retail), etc.<\/p>\n<p>El software te proporciona todo lo que necesitas; sistema llave en mano: para crear tu empresa de telefon\u00eda IP (VoIP) bajo tu propio nombre o marca. M\u00e1s informaci\u00f3n en  <a href=\"http:\/\/marcablanca.servervoip.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">marcaBlanca.servervoip.com<\/a><\/p>\n<p>Para que CREES y DESARROLLES tu propia empresa de telefonia por internet, revisa m\u00e1s detalles en <a href=\"http:\/\/www.servervoip.com\/voipswitch\/\" >VoIPSwitch<\/a><\/p>\n<hr \/>\n<h1 style=\"text-align: center;\">\u00bfQuieres Emprender por Internet?<\/h1>\n<h3 style=\"text-align: center;\">\u00abAhora Trabajar desde la Comodidad de tu Casa y Ganar Dinero por Internet&#8230; Nunca Hab\u00eda Sido tan F\u00e1cil, R\u00e1pido y con RESULTADOS Impresionantes\u00bb<\/h3>\n<p style=\"text-align: center;\">Descubre el NEGOCIO Perfecto y convi\u00e9rtete en un EMPRESARIO de \u00c9xito creando y desarrollando tu Propia Empresa de Telefon\u00eda por Internet. <strong>Suscr\u00edbete y RECIBE FREE<\/strong>:<\/p>\n<h2 style=\"text-align: center;\">\u00a1Sie7e Poderosas Razones Que Tiene el EMPRENDEDOR Exitoso para Crear su Propia Empresa de Telefon\u00eda por Internet VoIP!&#8230;<\/h2>\n<p><img loading=\"lazy\" class=\"aligncenter wp-image-1229 size-medium\" src=\"http:\/\/servimatango.com\/negocios-rentables\/wp-content\/uploads\/2015\/07\/libro-server-voip-241x300.png\" alt=\"libro server voip\" width=\"241\" height=\"300\" \/><br \/>\n[st_accordion div_margin_bottom=\u00bb15&#8243; initial_open=\u00bb0&#8243; multi_open=\u00bbyes\u00bb wrapper_padding_top=\u00bb0&#8243; wrapper_padding_left=\u00bb0&#8243; wrapper_padding_bottom=\u00bb0&#8243; wrapper_padding_right=\u00bb0&#8243; wrapper_bg_opacity_slider=\u00bb\u00bb wrapper_bg_opacity=\u00bb50&#8243; wrapper_border_style=\u00bboutset\u00bb wrapper_rounded_topleft=\u00bb3&#8243; id_wrapper=\u00bbelm_5c828b0bd3fa6&#8243; ][st_item_accordion heading=\u00bb<img class=aligncenter src=http:\/\/servimatango.com\/negocios-rentables\/wp-content\/uploads\/2015\/07\/Boton-descarga-reporte.gif alt=Reporte width=500 height=145 \/>\u00bb id_wrapper=\u00bbelm_5c828b0bd3f58&#8243; ]<center><script type=\"text\/javascript\" src=\"http:\/\/app.getresponse.com\/view_webform.js?wid=10619501&#038;u=kSvx\"><\/script><\/center>[\/st_item_accordion][\/st_accordion]<\/p>\n<p><a href=\"https:\/\/www.servimatango.com\/blog\/bancos-en-ecuador\/\">Bancos en Ecuador para Alquilar un VoIPSwitch Server<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Las aplicaciones audio en una red conllevan dos aspectos distintos, a saber, la digitalizaci\u00f3n y codificaci\u00f3n de los datos audio y el empaquetado de los datos para su transmisi\u00f3n por la red. La codificaci\u00f3n de audio se utiliza para transformar la se\u00f1al vocal anal\u00f3gica en una se\u00f1al digital de determinada velocidad binaria y calidad. La&#8230;<\/p>\n<p><a class=\"excerpt-read-more btn btn-primary\" href=\"https:\/\/servervoip.com\/blog\/principios-y-tecnicas-de-codificacion\/\" title=\"ReadPrincipios y t\u00e9cnicas de codificaci\u00f3n\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":8499,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"image","meta":[],"categories":[13],"tags":[2692,1033,2693,2694,2695,253],"_links":{"self":[{"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/posts\/8498"}],"collection":[{"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/comments?post=8498"}],"version-history":[{"count":0,"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/posts\/8498\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/media\/8499"}],"wp:attachment":[{"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/media?parent=8498"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/categories?post=8498"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/servervoip.com\/blog\/wp-json\/wp\/v2\/tags?post=8498"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}