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HDR顯示器

如果您今天購買的是電腦顯示器或筆記本電腦,則可能會在顯示規格中找到一個新術語:HDR或High Dynamic Range。HDR表示顯示器可以準確顯示以HDR格式保存的視頻和其他圖像內容,與以前的標準相比,該格式傳達的陰影和細微差別要大得多。

某些最新的Lenovo X系列平板電腦和敞篷車上都配備了HDR顯示器。但是HDR不僅適用於筆記本電腦。有HDR電視,HDR顯示器,甚至還有HDR平板電腦和智能手機。HDR10,Dolby Vision和其他HDR格式可以實現豐富的色彩細節,因此該技術非常適合從靜態攝影到動作視頻到想像的遊戲環境的所有內容。

HDR視頻仍然相對較新,並且兼容的內容雖然不斷增長,但仍不豐富。目前,這使HDR最受攝影師,視頻編輯和其他圖像專業人士的關注。但是隨著Netflix和Amazon現在都在流媒體播放HDR故事片和紀錄片,越來越多的普通消費者開始問“什麼是HDR?”。

HDR在早期顯示技術上做了哪些改進?

什麼是HDR?無需太深入了解技術細節,HDR顯示器所產生的亮度和色彩深度要比為滿足較早標準而製造的屏幕產生的亮度和色深更大。以下是一些HDR基礎知識:

  • HDR顯示亮度

    顯示亮度描述了它發出的光量,這又決定了屏幕上最亮和最暗像素之間的間隙。HDR顯示器產生的增加的光線使其最亮的像素比以前更亮,從而進一步將它們與最暗的像素區分開。對比度的提高使像素間的變化更加細微,圖像再現效果更好。

  • 亮度以坎德拉/ m2或“尼特”為單位進行測量-在專業和家用顯示器以及筆記本電腦顯示器的技術規範中,該術語越來越常見。已經發布了幾種不同的標準來定義什麼才可以作為HDR顯示器,通常筆記本電腦的起價為400尼特,高端專業顯示器的起價為1000尼特甚至10,000尼特。

  • HDR顯示色深

    色深是指顯示器的每個像素可以利用多少位數據來產生圖像或視頻中的顏色。在進行HDR之前,大多數顯示器都以8位彩色填充。但是新的HDR格式可以處理10位(甚至12位)的顏色,從而潛在地增加了屏幕上的顏色變化。

  • 這一切都在數學上。無論是直接還是通過抖動,8位顏色深度都可以使每種原色具有256種不同的陰影,從而可以生成大約1,650萬種顏色。10位顏色使陰影選項的數量從256個增加到1024個-將最大顏色變化增加到超過10億!

但是,HDR的經驗不僅限於亮度和色彩深度。 HDR內容還包含比典型內容更多的元數據,提供有關如何處理每個圖像或場景以實現預期顏色的詳細信息。一些HDR格式使用元數據來指導整個電影或場景的顯示,而其他格式(例如Dolby Vision)則承諾逐幀元數據。

最後,不要將HDR與其他新的與顯示相關的首字母縮寫相混淆,例如超高清(UHD)和4K,這兩個首字母縮寫僅與顯示分辨率有關(顯示器包含多少行像素,這又決定了每個視頻的詳細程度)或靜止圖像即可)。確實,HDR通常與UHD / 4K相關聯,但這是因為目前,該技術主要限於最有能力展示它的高端IPS顯示器。

是否有不同的HDR格式?

買家需要了解製造商提供的不同HDR格式。以下是HDR市場的現狀:

  • HDR10:使用10位顏色和通用元數據的HDR使用最廣泛的開放標準
  • 杜比視界(Dolby Vision):專有的杜比HDR技術有望實現12位等效色和逐場景的元數據
  • HDR10 +:據報導,逐幀元數據正在開發一種新的專有HDR格式
  • 其他HDR格式:其他公司正在開發的其​​他HDR格式包括HLG(來自BBC和NHK的Hybrid Log Gamma)和來自Technicolor的Advanced HDR。據稱,與錄製/流式傳輸內容相比,這兩項舉措都更側重於直播電視廣播。

不管採用哪種格式,與使用較舊技術的顯示器相比,那些查看HDR與非HDR內容的人都報告說亮度增加,對比度增強,色彩更加準確,細節更加精緻。

帶有HDR顯示屏的Lenovo系統

聯想一直是引入新的筆記本電腦和顯示器顯示功能的領導者,而HDR也不例外。我們享譽盛名的ThinkPad X系列包括業內首款筆記本電腦型號,可提供擴展的12位Dolby Vision HDR技術色彩:

  • ThinkPad X1 Carbon Gen 7:我們光滑的碳纖維增強超輕型顯示器可以配備14英寸HDR WQHD(2560 x 1440)IPS顯示屏(500尼特)和Dolby Vision。
  • ThinkPad X1 Extreme:這款超輕便型筆記本電腦配有配備杜比視界(Dolby Vision)的15.6英寸4K UHD HDR(3840 x 2160)IPS觸摸屏顯示器(400尼特)。
  • ThinkPad X1 Yoga:甚至我們的靈活2合1瑜伽系列也提供配備14英寸HDR WQHD(2560 x 1440)IPS多點觸摸顯示屏(500尼特)和Dolby Vision的型號。

所以請繼續。立即查看配備HDR的系統。圖像專業人士幾乎應該歸功於他們在HDR技術上的投入,因為它可以顯著改善色彩還原。包括重型電影流媒體和PC遊戲玩家在內的普通消費者正在發現越來越多的可用HDR內容,從而使支持HDR的消費者係統也越來越受歡迎。

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