
ITU made public a recommendation on high dynamic range in television La ITU propone ahora una HDR-TV que aporte una mayor sensaci n de realismo gracias a la optimizaci n de la fidelidad de color, superando as la recomendaci n que dict en octubre de 2015 (BT.2020) sobre UHDTV.
La Uni n Internacional de Telecomunicaciones (UIT) ha hecho p blica una recomendaci n sobre la aplicaci n de alto rango din mico (High Dynamic Range HDR) en entornos televisivos. La ITU propone ahora una HDR-TV que aporte una mayor sensaci n de realismo gracias a la optimizaci n de la fidelidad de color, superando as la recomendaci n que dict en octubre de 2015 (BT.2020) sobre televisi n de Ultra Alta Definici n. El Sector de Radiocomunicaciones (UIT-R) ha desarrollado la recomendaci n en colaboraci n con expertos de la industria de la televisi n, los propios broadcasters y las instituciones reguladoras de su Grupo de Estudio 6.
Fran ois Rancy, director de la divisi n de Radiocomunicaciones de la UIT, ha asegurado que la televisi n de alto rango din mico representa un paso importante mejorar las experiencias de realidad virtual que ofrezcan en el futuro emisiones broadcast y multimedia .
La recomendaci n UIT-R BT.2100 sobre HDR-TV aporta un nuevo impulso a las im genes de televisi n, dando a los espectadores una experiencia visual mejorada con mayor realismo. La recomendaci n pauta una serie de pr cticas que permitir n en televisi n sacar el m ximo provecho de las nuevas y mucho m s brillantes tecnolog as de visualizaci n. El alto rango din mico permite lograr una mayor tonalidad y brillo en escenas recogidas con luz natural al mismo tiempo que aumenta el detalle en secuencias grabadas en ambientes poco iluminados, dando a los productores de televisi n la capacidad de revelar la textura y los colores sutiles que normalmente se pierden con la televisi n de rango din mico est ndar actual.
La Recomendaci n HDR-TV detallan dos opciones para la producci n de im genes de televisi n de alto rango din mico: la denominada Perceptual Quantization (PQ) que busca lograr una muy amplia gama de niveles de brillo usando una funci n de transferencia que est finamente ajustada para que coincida con el sistema visual humano; y la especificaci n Hybrid Log-Gamma (HLG), que ofrece un grado de compatibilidad con pantallas heredadas con unas curvas de transferencia previamente establecidas. La Recomendaci n describe tambi n el proceso de conversi n simple entre las dos opciones para HDR-TV.
La recomendaci n UIT-R BT.2100 tambi n propone entre tres niveles de detalle o resoluci n: televisi n de alta definici n (1.920 1.080), UHDTV 4K (3.840 2.160) y 8K (7.680 4.320) utilizando todos ellos el sistema de imagen progresiva con amplia gama de colores y la gama de frame-rate recogida en la recomendaci n UIT UHDTV de BT.2020.
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