Q reveals in BIT Broadacast keys of the arrival of the audio over IP in the studios of radio
22/05/2014
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
LINK: | http://www.panoramaaudiovisual.com/en/2014/05/22/aeq-desvela-en-bit-br... |
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