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Q reveals in BIT Broadacast keys of the arrival of the audio over IP in the studios of radio

22/05/2014

AEQ reveals in BIT Broadacast keys of the arrival of the audio over IP in the studios of radio Javier Moreno, director comercial de AEQ, ha desvelado, en el workshop que ha impartido en BIT Broadcast, los beneficios que ha supuesto la llegada de IP a los estudios de radio. Una tecnolog a que ha optimizado la implementaci n de los sistemas de comunicaciones, aportando un audio de alta calidad y soluciones que han permitido una reducci n de costes.

La radio est viviendo una revoluci n en lo que a las comunicaciones se refiere con la llegada de la tecnolog a IP. Como explica Javier Moreno, director Comercial de AEQ, es la nueva forma de transmisi n de audio convertida a datos. No es algo nuevo. Ya desde hace unos a os, se ha estado aplicando a diferentes sectores en los que se buscaban diferentes soluciones a m ltiples problemas .

Javier Moreno ha explicado a los asistentes a BIT Broadcast, que hoy cierra sus puertas en IFEMA, c mo ha sido la llegada de IP a los estudios de radio y cu les son las principales beneficios que aporta a estos entornos.

La tecnolog a IP ha afectado principalmente a las comunicaciones exteriores, la VoIP y la distribuci n de audio lineal multicanal dentro de los estudios de radio. Aunque en el fondo todo esto es lo mismo, audio convertido a digital y transmitido a trav s de redes p blicas o privadas de datos utilizando IP, (el protocolo de transmisi n en Internet), la tecnolog a y los equipos son diferentes as como las necesidades a las que se pueden aplicar .

Aunque en los tres campos ha supuesto una gran revoluci n la llegada de la tecnolog a IP ha sido en la transmisi n de se ales de audio donde realmente ha supuesto una gran novedad. Se trata de la posibilidad de realizar env os multicanal dentro de cada emisora o estudio permitiendo un importante ahorro de cableado y una forma muy sencilla de distribuir las se ales entre todas las consolas o equipos instalados.

El env o de audio multicanal no es algo nuevo ya se estaba utilizando en los conciertos de grupos musicales desde hace casi 20 a os y en el mundo de la radio lo que se ha estado utilizando, y en algunos sitios se sigue utilizando es el sistema MADI .

MADI es un tipo de enlace que permite la transmisi n de hasta 64 canales de audio por enlace de un punto de origen a un punto de destino determinado y fijo.

Con IP se ha conseguido disponer de un n mero de canales de audio solo limitado por la capacidad de la red, para todos los equipos conectados a sta de forma simult nea. Todos los equipos conectados a esta red, pueden estar contribuyendo con se ales para que sean seleccionadas por otros equipos de forma simult nea.

Su llegada a los estudios de radio ha sido tard a, sobre todo, por problemas de compatibilidad. En estos entornos existen una gran diversidad de equipos con muy diferentes funciones y de muy diversos fabricantes.

AEQ, al igual que otros reconocidos fabricantes de equipos, ha estado esperando la aparici n de una norma que haga que todos los equipamiento y marcas sean compatibles entre si. Y, aunque ya se sabe que ser AES 67 todav a no no esta cerrada al 100%. Sin embargo mas de cien fabricantes, Solid State Logia, Yamaha, SAS, NTP, Studer y nosotros mismos, nos hemos puesto de acuerdo en utilizar la tecnolog a Dante que permite la interconexi n de todas las marcas entre s , y que en un futuro muy pr ximo, migrar a la compatibilidad AES 67 con una simple actualizaci n. Todas las consolas digitales AEQ tienen ya en funcionamiento su m dulo AoIP y se conectan directamente entre ellas o con cualquier equipo conectado en red. Otros fabricantes est n llegando a soluciones equivalentes a trav s de la plataforma Ravennaen la que AEQ tambi n participa, pero cuyos resultados pensamos no ser n tan inmediatos ni efectivos en coste y flexibilidad.

AEQ ha desarrollado los Net Box, unos equipos que disponen de un conjunto de entradas y salidas de audio anal gicas y digitales que permiten conectar directamente a la red IP y as integrar todo el equipamiento auxiliar disponible en unos estudios. La configuraci n de se ales de estos equipos se realiza a trav s del software de control general de la red y es compatible con la red de control y transmisi n Dante.

External communications

Los audiocodificadores IP son equipos capaces de convertir una se al de audio en un flujo comprimido de datos para transmitir a trav s de redes privadas (Intranet) o a trav s de redes p blicas como Internet.

Los primeros audiocodificadores se comenzaron a utilizar para redes de telefon a anal gica y hoy en se siguen utilizando en lugares donde las redes digitales (Internet y RDSI) no se han impuesto como redes de calidad o son inexistentes. Sin embargo, cuando realmente aparecen como se conocen de forma mas com n, es con la llegada de las l neas RDSI. En un principio con bastante inestabilidad, pero luego se han convertido en una referencia del tipo de l nea, por su capacidad de transmisi n y estabilidad de la comunicaci n.

En AEQ se ha tenido mucha experiencia con este tipo de equipos y algunos han llegado a ser una referencia en el mundo, como los codificadores port tiles AEQ TLE-02D o el ACD 3001 con el que se realizaron los campeonatos mundiales de f tbol en USA 1994 por primera vez utilizando esta tecnolog a .

Estos codificadores para RDSI son la base de la nueva generaci n de codificadores sobre protocolo IP que presentan dos diferencias fundamentales, por un lado, la forma en la que las l neas de comunicaciones son capaces de transmitir esos datos (audio convertido) y, por otro, el protocolo de conexi n entre origen y destino.

En las l neas IP, los formatos de codificaci n para la transmisi n son los mismos y se a aden nuevos formatos mas actuales, de mayor compresi n y mejoras en relaci n a retardos y calidad . Ahora se utilizan direcciones IP o, en el caso de la utilizaci n de protocolo de comu
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