High Efficiency Video Coding

HEVCH.265H.265/HEVCHEVC (H.265)Scalable HEVCH.265/MPEG-H HEVCH.265/MPEG-H Part 2H265Decoded Picture BufferH.265 (HEVC)
High Efficiency Video Coding (HEVC), also known as H.265 and MPEG-H Part 2, is a video compression standard, designed as a successor to the widely used Advanced Video Coding (AVC, H.264, or MPEG-4 Part 10).wikipedia
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Video coding format

video coding standardsvideo codingvideo coding standard
High Efficiency Video Coding (HEVC), also known as H.265 and MPEG-H Part 2, is a video compression standard, designed as a successor to the widely used Advanced Video Coding (AVC, H.264, or MPEG-4 Part 10).
Examples of video coding formats include H.262 (MPEG-2 Part 2), MPEG-4 Part 2, H.264 (MPEG-4 Part 10), HEVC (H.265), Theora, RealVideo RV40, VP9, and AV1.

HEVC Advance

Patent licenses can be obtained directly from each patent holder, or through patent licensing bodies, such as MPEG LA, HEVC Advance, and Velos Media.
HEVC Advance is a patent licensing pool aimed at the HEVC video standard, in addition to the existing MPEG LA pool.

MPEG LA

MPEG-LAMPEG Licensing AdministrationMPEG Licensing Authority
Patent licenses can be obtained directly from each patent holder, or through patent licensing bodies, such as MPEG LA, HEVC Advance, and Velos Media.
MPEG LA is an American company based in Denver, Colorado that licenses patent pools covering essential patents required for use of the MPEG-2, MPEG-4, IEEE 1394, VC-1, ATSC, MVC, MPEG-2 Systems, AVC/H.264 and HEVC standards.

AV1

AOMedia Video 1AVIFAV1 Image File Format
HEVC is competing with the royalty-free AV1 coding format for standardization by the video standard working group NetVC of the Internet Engineering Task Force (IETF). 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 (Amazon, AMD, Apple, ARM, Cisco, Google, Intel, Microsoft, Mozilla, Netflix, Nvidia, and more) have joined the Alliance for Open Media, which aimed to finalize the royalty-free alternative video coding format AV1 by the end of 2017.
The Alliance's motivations for creating AV1 included the high cost and uncertainty involved with the patent licensing of HEVC, the MPEG-designed codec expected to succeed AVC.

Discrete cosine transform

DCTiDCTinverse discrete cosine transform
While AVC uses the integer discrete cosine transform (DCT) with 4x4 and 8x8 block sizes, HEVC uses integer DCT and DST transforms with varied block sizes between 4x4 and 32x32.
The integer DCT is used in Advanced Video Coding (AVC), introduced in 2003, and High Efficiency Video Coding (HEVC), introduced in 2013.

VP9

VP10VP9 hardware implementations
Others argued the rates might cause companies to switch to competing standards such as Daala and VP9.
VP9 is the successor to VP8 and competes mainly with MPEG's High Efficiency Video Coding (HEVC/H.265).

NETVC

Internet Video Codec
HEVC is competing with the royalty-free AV1 coding format for standardization by the video standard working group NetVC of the Internet Engineering Task Force (IETF).
It is intended to provide a royalty-free alternative to industry standards such as MPEG-4 and HEVC that require licensing payments for many uses.

Alliance for Open Media

AOMedia
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 (Amazon, AMD, Apple, ARM, Cisco, Google, Intel, Microsoft, Mozilla, Netflix, Nvidia, and more) have joined the Alliance for Open Media, which aimed to finalize the royalty-free alternative video coding format AV1 by the end of 2017.
Its first project was to develop AV1, a new open video codec and format as a successor to VP9 and a royalty-free alternative to HEVC, which uses elements from Daala, Thor, and VP10.

ITU-T

CCITTITU Telecommunication Standardization SectorTelecommunication Standardization Sector
HEVC was standardized by the Joint Collaborative Team on Video Coding (JCT-VC), a collaboration between the ISO/IEC MPEG and ITU-T VCEG.

MPEG-H

ISO/IEC 23008
High Efficiency Video Coding (HEVC), also known as H.265 and MPEG-H Part 2, is a video compression standard, designed as a successor to the widely used Advanced Video Coding (AVC, H.264, or MPEG-4 Part 10).

MulticoreWare

On July 23, 2013, MulticoreWare announced, and made the source code available for the x265 HEVC Encoder Library under the GPL v2 license.
MulticoreWare Inc is a software development company, offering products and services related to (i) HEVC video compression, (ii) machine learning (specifically, convolutional neural networks), (iii) compilers for heterogeneous computing, and (iv) software performance optimization.

Ateme

On April 3, 2013, Ateme announced the availability of the first open source implementation of a HEVC software player based on the OpenHEVC decoder and GPAC video player which are both licensed under LGPL.
ATEME is a French broadcast equipment company specialized in video compression H.265 / HEVC; MPEG4; MPEG2 encoding / decoding solutions for contribution links, distribution, multi-screen live streaming, OTT and VOD applications.

X265

libx265
On July 23, 2013, MulticoreWare announced, and made the source code available for the x265 HEVC Encoder Library under the GPL v2 license.
x265 is a library for encoding video into the High Efficiency Video Coding (HEVC/H.265) video compression format that was developed and standardized by the ISO/IEC MPEG and ITU-T VCEG.

DivX, Inc.

DivXDivX Inc.DivXNetworks
On November 14, 2013, DivX developers released information on HEVC decoding performance using an Intel i7 CPU at 3.5 GHz with 4 cores and 8 threads.
DivX, LLC is best known as a producer of three codecs: an MPEG-4 Part 2-based codec, the H.264/MPEG-4 AVC DivX Plus codec and the High Efficiency Video Coding DivX HEVC Ultra HD codec.

Color depth

truecolorbit depthtrue color
On September 5, 2014, the Blu-ray Disc Association announced that the 4K Blu-ray Disc specification would support HEVC-encoded 4K video at 60 fps, the Rec. 2020 color space, high dynamic range (PQ and HLG), and 10-bit color depth.
For consumer video standards, such as High Efficiency Video Coding (H.265), the bit depth specifies the number of bits used for each color component.

Hybrid Log-Gamma

HLGHLG-standardHybrid Log-Gamma (HLG)
On September 5, 2014, the Blu-ray Disc Association announced that the 4K Blu-ray Disc specification would support HEVC-encoded 4K video at 60 fps, the Rec. 2020 color space, high dynamic range (PQ and HLG), and 10-bit color depth.
HLG is supported by HDMI 2.0b, HEVC, VP9, and H.264/MPEG-4 AVC.

Coding tree unit

Coding tree blockLargest coding unit
HEVC benefits from the use of larger coding tree unit (CTU) sizes.
Coding tree unit (CTU) is the basic processing unit of the High Efficiency Video Coding (HEVC) video standard and conceptually corresponds in structure to macroblock units that were used in several previous video standards.

Blu-ray

Blu-ray DiscBDBlu-ray 3D
On September 5, 2014, the Blu-ray Disc Association announced that the 4K Blu-ray Disc specification would support HEVC-encoded 4K video at 60 fps, the Rec. 2020 color space, high dynamic range (PQ and HLG), and 10-bit color depth.
It is to offer MPEG-2, MPEG-4 AVC (H.264), HEVC (H.265), and VC-1 encoding, supporting a maximum storage capacity of 6TB.

MacOS High Sierra

macOS 10.13macOS 10.13 High Sierra10.13
On June 5, 2017, Apple announced HEVC H.265 support in macOS High Sierra, iOS 11, tvOS, HTTP Live Streaming and Safari.
macOS High Sierra adds support for High Efficiency Video Coding (HEVC), with hardware acceleration where available, as well as support for High Efficiency Image File Format (HEIF).

Daala

Others argued the rates might cause companies to switch to competing standards such as Daala and VP9.
Daala is intended to be a high-efficiency video coding format for use cases similar to those of High Efficiency Video Coding (HEVC or H.265) and VP9.

Windows 10

10Windows HelloMicrosoft Windows 10
On October 31, 2014, Microsoft confirmed that Windows 10 will support HEVC out of the box, according to a statement from Gabriel Aul, the leader of Microsoft Operating Systems Group's Data and Fundamentals Team.
Windows 10 adds FLAC and HEVC codecs and support for the Matroska media container, allowing these formats to be opened in Windows Media Player and other applications.

Primetime Engineering Emmy Awards

Primetime Emmy Engineering AwardPrimetime Engineering Emmy AwardEngineering Emmy Award
In October 2017, the standard was recognized by a Primetime Emmy Engineering Award
Engineering Emmy Award: Joint Collaborative Team on Video Coding (JCT-VC) for High Efficiency Video Coding (HEVC)

IOS 11

11iOS 11.0iOS 11.3
On June 5, 2017, Apple announced HEVC H.265 support in macOS High Sierra, iOS 11, tvOS, HTTP Live Streaming and Safari. This feature would not be unlocked until the release of iOS 11 in 2017.
On devices with an Apple A10 chip or newer, photos can be compressed in the new High Efficiency Image File Format and videos can be encoded in the new High Efficiency Video Coding video compression format, enabling improved quality while also decreasing size by half.

MythTV

Myth TVMythTV with uPnPNUV
On April 11, 2016, full HEVC (H.265) support was announced in the newest MythTV version (0.28).

Context-adaptive binary arithmetic coding

CABACCABAC entropy coding
HEVC uses a context-adaptive binary arithmetic coding (CABAC) algorithm that is fundamentally similar to CABAC in H.264/MPEG-4 AVC.
Context-adaptive binary arithmetic coding (CABAC) is a form of entropy encoding used in the H.264/MPEG-4 AVC and High Efficiency Video Coding (HEVC) standards.