论文学习：Overview of the High Efficiency Video Coding Standard

Posted 2020-12-31 ryanxing

Souce
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, VOL. 22, NO. 12, DECEMBER 2012

Background (2012)
HEVC is currently being prepared as the newest video coding standard of the ITU-T Video Coding Experts Group and the ISO/IEC Moving Picture Experts Group.
因此下文的语境，是2012年标准尚未确定时。

Abstract
The main goal of the HEVC standardization effort is to enable significantly improved compression performance relative to existing standards --in the range of 50% bit-rate redunction for equal perceptual video quality.
HEVC标准化的主要目的，在于提高压缩效率——和现有标准相比，在保持感知视频质量不变的情况下，减小最多50%的比特率。

Ⅰ. INTRODUCTION

HEVC的别名

In ISO/IEC, the HEVC standard will become MPEG-H Part 2 (ISO/IEC 23008-2) and in ITU-T it is likely to become ITU-T Recommendation H.265.
HEVC被ITU-T组织命名为H.265，被ISO/IEC组织命名为MPEG-H Part 2。

WIKIPEDIA: High Efficiency Video Coding (HEVC), also known as H.265 and MPEG-H Part 2, is a video compression standard, one of several potential successors to the widely used AVC (H.264 or MPEG-4 Part 10).

关于ITU-T和ISO这两大标准制定组织的补充：
Video coding standards have evolved primarily through the development of the well-known ITU-T and ISO/IEC standards.
The ITU-T produced H.261 [2] and H.263 [3], ISO/IEC produced MPEG-1 [4] and MPEG-4 Visual [5], and the two organizations jointly produced the H.262/MPEG-2 Video [6] and H.264/MPEG-4 Advanced Video Coding (AVC) [7] standards.

关于HEVC的前任：AVC

The major video coding standard directly preceding the HEVC project was H.264/MPEG-4 AVC, which was initially developed in the period between 1999 and 2003.
在HEVC之前的主要视频编码标准，是H.264/MPEG-4 AVC。AVC标准最早在1999到2003年发展起来。

H.264/MPEG-4 AVC has been an enabling technology for digital video in almost every area that was not previously covered by H.262/MPEG-2 Video and has substantially displaced the older standard within its existing application domains.
AVC是跨时代的。其应用在数字视频中，涵盖了几乎所有H.262/MPEG-2 没能覆盖的领域，并且本质上在其覆盖领域内代替了所有过去的标准。

AVC暴露的问题

However, an increasing diversity of services, the growing popularity of HD video, and the emergence of beyondHD formats (e.g., 4k×2k or 8k×4k resolution) are creating even stronger needs for coding efficiency superior to H.264/MPEG-4 AVC’s capabilities.
服务的日益多样化、高清视频的增多、超高清格式的出现，对编码效率的要求越来越高，并且高于H.264/MPEG-4 AVC的性能。

当stereo 或 multiview capture and display出现时，这种需求愈发明显。

并且，视频通信对当今networks提出了挑战。

HEVC的两大着重点

HEVC不仅要能处理现存的AVC应用的所有设备，而且特别着重于两大要点：

1. increased video resolution
2. increased use of parallel processing architectures