新一代视频编码HEVC标准 简介

 

新一代视频编码HEVC标准
 HEVC (High Efficiency Video Coding)是即H.264后的视频编码方案,由 ISO/IEC (MPEG) and ITU-T 的 Video Coding Experts Group (VCEG) 联合构建,通过JCT-VC( Joint Collaborative Team on Video Coding )运作(类似于H.264中的JVT)。这就是以后的H.265。
参考代码:
类似于H.264中的JM模型,HEVC模型为TMuC(Test Model under Consideration),目前已经到HM7.0版本了:下载地址:
https://hevc.hhi.fraunhofer.de/svn/svn_HEVCSoftware/branches/HM-7.0-dev
可以通过TortoiseSVN下载。

目前基本编码工具介绍:

  • adaptive loop filter (ALF),
  • extended macroblock size (EMS),
  • larger transform size (LTS),
  • internal bit depth increasing (IBDI),
  • adaptive quantization matrix selection (AQMS),

as well as new coding tools, such as

  • modified intra prediction,
  • modified de-block filter,
  • decoder-side motion vector derivation (DMVD).

Many new features are proposed to meet the requirements:

  • 2-D non-separable adaptive interpolation filter (AIF)
  • Separable AIF
  • Directional AIF
  • "Supermacroblock" structure up to 64x64 with additional transforms
  • Adaptive prediction error coding (APEC) in spatial and frequency domain
  • Competition-based scheme for motion vector selection and coding
  • Mode-dependent KLT for intra coding.

 

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