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HDMI 1.4b was released on October 11, 2011, [110] containing only minor clarifications to the 1.4a document. HDMI 1.4b is the last version of the standard that HDMI LA is responsible for. All later versions of the HDMI Specification are produced by the HDMI Forum, created on October 25, 2011. [34] [111]
2.4:1 = 12:5 ~ 21:9 Rounded notation of 2.39:1 also known as 2.40:1. All film releases may use 800 lines of the 1920×800 resolution resulting in the 2.40:1 aspect ratio of Blu-ray Disc. 2.55:1 = 51:20 Original aspect ratio of CinemaScope before optical sound was added to the film in 1954. This was also the aspect ratio of CinemaScope 55. 2 ...