In 2005, Digital Cinema Initiatives (DCI), a prominent standards organization in the cinema industry, published the Digital Cinema System Specification. This specification establishes standardized 2K and 4K container formats for digital cinema production, with resolutions of 2048 × 10 × 2160 respectively. 4096 × 1716 (CinemaScope crop, ≈2.39∶1 aspect ratio)ĢK distributions can have a frame rate of either 24 or 48 FPS, while 4K distributions must have a frame rate of 24 FPS.: §4.3.1 The resolution of the video content inside follows the SMPTE 428-1 standard, : §3.2.1 which establishes the following resolutions for a 4K distribution: : 6
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