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{"id":2424003,"date":"2021-12-14T10:23:08","date_gmt":"2021-12-14T09:23:08","guid":{"rendered":"https:\/\/www.phonandroid.com\/?p=2424003"},"modified":"2021-12-15T10:43:17","modified_gmt":"2021-12-15T09:43:17","slug":"attention-a-ces-faux-ecrans-hdmi-2-1-voici-comment-les-reperer","status":"publish","type":"post","link":"https:\/\/www.phonandroid.com\/attention-a-ces-faux-ecrans-hdmi-2-1-voici-comment-les-reperer.html","title":{"rendered":"Attention \u00e0 ces faux \u00e9crans HDMI 2.1, voici comment les rep\u00e9rer"},"content":{"rendered":"

La nouvelle norme HDMI 2.1 a r\u00e9volutionn\u00e9 le gaming, en permettant notamment de nouvelles fonctionnalit\u00e9s comme l\u2019ALLM, le VRR ou encore la compatibilit\u00e9 avec la d\u00e9finition 10K \u00e0 120 Hz, mais tous les \u00e9crans ne profiteraient pas des m\u00eames performances.<\/strong><\/p>\n

\"PC
Cr\u00e9dit : Unsplash<\/figcaption><\/figure>\n

La norme HDMI 2.1 apporte de nouvelles fonctionnalit\u00e9s tr\u00e8s int\u00e9ressantes pour le gaming<\/a>. On peut notamment citer le taux de rafra\u00eechissement variable (VRR),<\/strong> un mode automatique \u00e0 faible latence (ALLM). <\/strong>Elle prend \u00e9galement en charge une \u00e9norme bande passante 48 Gbps<\/strong> pour offrir une d\u00e9finition allant jusqu'\u00e0 10K et un taux de rafra\u00eechissement allant jusqu'\u00e0 120 Hz<\/strong>. Elle est essentielle pour profiter pleinement des consoles de nouvelle g\u00e9n\u00e9ration Xbox Series X<\/a> et PS5<\/a>.<\/p>\n

Cependant, il semblerait que tous les \u00e9crans ne soient pas compatibles avec ces nouvelles fonctionnalit\u00e9s<\/strong>, m\u00eame si la fiche technique fait mention d\u2019un port HDMI 2.1. Le site TFT Central, sp\u00e9cialis\u00e9 dans les moniteurs, a remarqu\u00e9 qu'un nouvel \u00e9cran PC de Xiaomi vendu en Chine portait la mention \u00ab\u00a0HDMI 2.1*<\/em>\u00a0\u00bb dans ses sp\u00e9cifications, bien qu'il ne propose qu\u2019une d\u00e9finition 1080p (\u00e0 240 Hz).<\/p>\n

Le fabricant chinois expliquerait en petits caract\u00e8res que la bande passante correspond uniquement \u00e0 la sp\u00e9cification HDMI 2.0, et qu\u2019il ne serait donc pas compatible avec les technologies ALLM et VRR. En effet, l\u2019\u00e9cran ne prendrait en charge que les protocoles de signalisation TMDS. En d'autres termes, il est conforme \u00e0 la sp\u00e9cification HDMI 2.0 avec un d\u00e9bit de 18 Gbps au lieu de la sp\u00e9cification HDMI 2.1 de 48 Gbps<\/strong>. Il s\u2019agirait vraisemblablement d\u2019une pratique autoris\u00e9e. Xiaomi avait d\u2019ailleurs d\u00e9j\u00e0 menti en d\u00e9but d\u2019ann\u00e9e en annon\u00e7ant un port HDMI 2.1 sur son t\u00e9l\u00e9viseur Mi TV Q1<\/a>, alors que celui-ci n\u2019\u00e9tait pas compatible avec la d\u00e9finition 4K \u00e0 120 Hz.<\/p>\n