39 Facts About HEVC

The primary changes for HEVC include the expansion of the pattern comparison and difference-coding areas from 16×16 pixel to sizes up to 64×64, improved variable-block-size segmentation, improved "intra" prediction within the same picture, improved motion vector prediction and motion region merging, improved motion compensation filtering, and an additional filtering step called sample-adaptive offset filtering.

The first version of the HEVC standard was ratified in January 2013 and published in June 2013.

HEVC contains technologies covered by patents owned by the organizations that participated in the JCT-VC.

The licensing fees are one of the main reasons HEVC adoption has been low on the web and is why some of the largest tech companies have joined the Alliance for Open Media, which finalized a royalty-free alternative video coding format AV1 on March 28,2018.

HEVC format was jointly developed by more than a dozen organisations across the world.

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The first working draft specification of HEVC was produced at the third JCT-VC meeting in October 2010.

On January 25,2013, the ITU announced that HEVC had received first stage approval in the ITU-T Alternative Approval Process.

On July 11,2014, MPEG announced that the 2nd edition of HEVC will contain three recently completed extensions which are the multiview extensions, the range extensions, and the scalability extensions.

Unlike the MPEG LA terms, HEVC Advance reintroduced license fees on content encoded with HEVC, through a revenue sharing fee.

On November 22,2016, HEVC Advance announced a major initiative, revising their policy to allow software implementations of HEVC to be distributed directly to consumer mobile devices and personal computers royalty free, without requiring a patent license.

On February 29,2012, at the 2012 Mobile World Congress, Qualcomm demonstrated a HEVC decoder running on an Android tablet, with a Qualcomm Snapdragon S4 dual-core processor running at 1.

On October 17,2017, Microsoft removed HEVC decoding support from Windows 10 with the Version 1709 Fall Creators Update, making HEVC available instead as a separate, paid download from the Microsoft Store.

The bit rate reductions for HEVC were determined based on PSNR with HEVC having a bit rate reduction of 35.

HEVC was designed with the goal of allowing video content to have a data compression ratio of up to 1000:1.

HEVC is targeted at next-generation HDTV displays and content capture systems which feature progressive scanned frame rates and display resolutions from QVGA to 4320p, as well as improved picture quality in terms of noise level, color spaces, and dynamic range.

HEVC was designed with the idea that progressive scan video would be used and no coding tools were added specifically for interlaced video.

HEVC instead sends metadata that tells how the interlaced video was sent.

HEVC specifies four transform units sizes of 4×4,8×8,16×16, and 32×32 to code the prediction residual.

HEVC has improved precision due to the longer interpolation filter and the elimination of the intermediate rounding error.

HEVC defines a signed 16-bit range for both horizontal and vertical motion vectors.

HEVC allows for two MV modes which are Advanced Motion Vector Prediction and merge mode.

The first improvement is that HEVC uses index information to select one of several available candidates.

The second improvement is that HEVC uses information from the reference picture list and reference picture index.

HEVC specifies two loop filters that are applied sequentially, with the deblocking filter applied first and the sample adaptive offset filter applied afterwards.

HEVC requires that the DBF first apply horizontal filtering for vertical edges to the picture and only after that does it apply vertical filtering for horizontal edges to the picture.

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Fourth version of HEVC adds several supplemental enhancement information messages which include:.

Version 1 of the HEVC standard defines three profiles: Main, Main 10, and Main Still Picture.

Version 2 of HEVC adds 21 range extensions profiles, two scalable extensions profiles, and one multi-view profile.

Main 10 profile was added at the October 2012 HEVC meeting based on proposal JCTVC-K0109 which proposed that a 10-bit profile be added to HEVC for consumer applications.

HEVC has a larger performance improvement for higher resolution images than lower resolution images and a larger performance improvement for lower bit rates than higher bit rates.

The study showed that HEVC was significantly better at compression than the other image formats that were tested.

The High Throughput 4:4:4 16 Intra profile has an HbrFactor 12 times higher than other HEVC profiles allowing it to have a maximum bit rate 12 times higher than the Main 4:4:4 16 Intra profile.

The Screen-Extended High Throughput 4:4:4 profile has an HbrFactor 6 times higher than most inter frame HEVC profiles allowing it to have a maximum bit rate 6 times higher than the Main 4:4:4 profile.

The Screen-Extended High Throughput 4:4:4 10 profile has an HbrFactor 6 times higher than most inter frame HEVC profiles allowing it to have a maximum bit rate 6 times higher than the Main 4:4:4 10 profile.

The High Throughput 4:4:4 profile has an HbrFactor 6 times higher than most inter frame HEVC profiles allowing it to have a maximum bit rate 6 times higher than the Main 4:4:4 profile.

The High Throughput 4:4:4 10 profile has an HbrFactor 6 times higher than most inter frame HEVC profiles allowing it to have a maximum bit rate 6 times higher than the Main 4:4:4 10 profile.

HEVC standard defines two tiers, Main and High, and thirteen levels.

Support for HEVC was added to Matroska starting with the release of MKVToolNix v6.

HEVC Advance made an exception that specifically waives the royalties on software-only implementations when not bundled with hardware.