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Ultra HD Blu-ray (4K Ultra HD, UHD-BD, or 4K Blu-ray) [2] [3] is a digital optical disc data storage format that is an enhanced variant of Blu-ray. [4] Ultra HD Blu-ray supports 4K UHD (3840 × 2160 pixel resolution) video at frame rates up to 60 progressive frames per second, [ 4 ] encoded using High-Efficiency Video Coding . [ 4 ]
High Efficiency Video Coding tiers and levels are constraints that define a High Efficiency Video Coding (HEVC) bitstream in terms of maximum bit rate, maximum luma sample rate, maximum luma picture size, minimum compression ratio, maximum number of slices allowed, and maximum number of tiles allowed.
Uncompressed video is digital video that either has never been compressed or was generated by decompressing previously compressed digital video. It is commonly used by video cameras, video monitors, video recording devices (including general-purpose computers), and in video processors that perform functions such as image resizing, image rotation, deinterlacing, and text and graphics overlay.
The video sequences were encoded using the HM-12.1 HEVC encoder and the JM-18.5 H.264/MPEG-4 AVC encoder. The comparison used a range of resolutions and the average bit rate reduction for HEVC was 59%. The average bit rate reduction for HEVC was 52% for 480p, 56% for 720p, 62% for 1080p, and 64% for 4K UHD. [127]
This is a list of Avid DNxHD resolutions, mainly available in multiple HD encoding resolutions based on the frame size and frame rate of the media being encoded. The list below shows the available encoding choices for each of the available frame size and frame rate combinations.
DNxHR HQX - High Quality (12-bit 4:2:2) (UHD/4K Broadcast-quality delivery) DNxHR 444 - Finishing Quality (12-bit 4:4:4) (Cinema-quality delivery) Bandwidth requirements for the codec and its different flavors have been announced in the "Avid High Resolution Workflows Guide - December 2014" on page 166-172.
Tests from University of Waterloo in 2020 found that when using a mean opinion score (MOS) for 2160p (4K) video AV1 had the bitrate saving of 9.5% compared to HEVC and 16.4% compared to VP9. They also concluded that at the time of the study at 2160p the AV1 video encodes on average took 590× longer compared to encoding with AVC; while HEVC ...
[77] [78] [79] Additional 4K movies and 4K video clips will be offered for the 4K Ultra HD Video Player in the future. [ 77 ] [ 78 ] [ 79 ] On November 30, 2012, Red Digital Cinema Camera Company announced that they were taking pre-orders for the US$1,450 REDRAY 4K Cinema Player, which can output 4K resolution to a single 4K display or to four ...