13/09/26 21:35:26.87 wOWbV8BR
圧縮効率がH.264の2倍な次世代ビデオコーデックH.265/HEVC、
並びに同等の圧縮効率でフリーの次世代コーデック、VP9/Daalaを語ろうぜ
H.265/HEVC Features
Tree-structured prediction and residual difference block segmentation
Extended prediction block sizes (up to 64x64)
Large transform block sizes (up to 32x32)
Tile and slice picture segmentations for loss resilience and parallelism
Wavefront processing structure for decoder parallelism
Non-square transform block sizes
Integer inverse transforms
Mode-dependent sine/cosine transform type switching
Adaptive motion vector predictor selection
Temporal motion vector prediction
Multi-frame motion compensation prediction
High-accuracy motion compensation interpolation (8 taps)
Internal bit depth increase (IBDI)
Directional intra prediction
De-blocking filter
Adaptive loop filter (ALF)
Sample adaptive offset (SAO)
Entropy coding using one of two selectable types:
Context-adaptive binary arithmetic coding (CABAC)
Context-adaptive variable-length coding (CAVLC)
単純に見積もって画質は今(H.264)と変わらないままでサイズが半分に小さくできる
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