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{"id":25438,"date":"2019-03-01T18:26:21","date_gmt":"2019-03-01T17:26:21","guid":{"rendered":"https:\/\/blog.eavs-groupe.com\/?p=25438"},"modified":"2019-03-01T18:26:23","modified_gmt":"2019-03-01T17:26:23","slug":"dossier-quest-ce-que-le-hdr-en-quoi-est-il-important","status":"publish","type":"post","link":"https:\/\/blog.eavs-groupe.com\/actualite-de-nos-metiers\/dossier-quest-ce-que-le-hdr-en-quoi-est-il-important\/","title":{"rendered":"[Dossier] Qu’est-ce que le HDR ? En quoi est-il important ?"},"content":{"rendered":"\n
\"[Dossier]
\u00a9WCCFTech<\/figcaption><\/figure><\/div>\n\n\n\n

HDR par ci, HDR par l\u00e0, vous devez entendre ce terme en permanence. Il est fatalement associ\u00e9 \u00e0 l’Ultra HD et \u00e0 la 4K. Si bien que pour certain, le High Dynamic Range serait plus important que l’ultra haute d\u00e9finition. Remettons les choses \u00e0 leur place et d\u00e9finissons ce qu’est le HDR, ce qu’il apporte et en quoi il est important (ou pas).<\/strong><\/p>\n\n\n\n

High Dynamic Range<\/h2>\n\n\n\n

Le High Dynamic Range<\/strong> est apparu avec l’Ultra HD. C’est l’une des caract\u00e9ristiques optionnelles d’un flux vid\u00e9o UHD\/4K. Le HDR n’existe pas sur les formats vid\u00e9o de d\u00e9finition inf\u00e9rieure.<\/p>\n\n\n\n

Le HDR a \u00e9t\u00e9 invent\u00e9 par Dolby<\/strong> tout d’abord \u00e0 destination des salles de cinema labellis\u00e9es Dolby Cinema. Il a ensuite \u00e9t\u00e9 d\u00e9clin\u00e9 pour d’autres usages, et en particulier pour le Blu-ray UHD et les services de vid\u00e9o en streaming sur abonnement (Netflix, Amazon Prime). Il est aujourd’hui utilis\u00e9 \u00e9galement pour l’affichage dynamique<\/a> et l’\u00e9v\u00e9nementiel.<\/p>\n\n\n\n

\"\"
\u00a9Dolby<\/figcaption><\/figure><\/div>\n\n\n\n

Une \u00e9chelle de luminosit\u00e9 avec plus de barreaux<\/h2>\n\n\n\n

La qualit\u00e9 de restitution d’un signal vid\u00e9o se d\u00e9fini par sa d\u00e9finition, sa colorim\u00e9trie, sa saturation, son contraste, sa luminosit\u00e9… Quand l’UHD augmente le nombre de pixels (la d\u00e9finition), le HDR augmente les capacit\u00e9s en luminosit\u00e9\u00a0:<\/strong><\/p>\n\n\n\n