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Februar 2012: Committee Draft (vollständiger Entwurf des Standards)
Juli 2012: Entwurf einer internationalen Norm
25. Januar 2013: Bestätigung als Standard durch die ITU[8][9]
veröffentlicht im Januar 2013
von JCT-VC (Joint Collaborative Team on Video Coding) Bild und Film Experten aus der ganzen Welt.
um Standard zu entwickeln der aus 2 Teilen besteht:
1. ITU-T Study Group 16 und Video Coding Experts Group (VCEG) veröffentlichen H.265 standard als ITU-T H.265
2. ISO/IEC JTC 1/SC 29/WG 11 Motion Picture Experts Group (MPEG) veröffentlichen den HEVC standard als ISO/IEC 23008-2
HEVC Ziel: Doppelte Kompressions effizienz wie H.264 / AVC
Effizienz soll abhängig sein von Inhalt und encoder(Komprimierer) Einstellungen.
->Bei gleicher Qualität: H.265 datei halb so groß wie H.264
->Bei gleicher datei Größe:H.265 Visuelle Qualität deutlich besser
Wie kann HEVC doppelt so gut sein?
motion compensated prediction. = Bewegungsvorhersage
Pixel zeigen auf gleiche Pixel Blöcke/Gruppen
H.264/AVC hat makroblöcke bis zu 16×16 pixel --- HEVCbis zuo 64 x 64 pixel.
Blöcke können in Teilblöcke unterteilt werden zb; 16×16, 8×8, and 4×4
There are 35 intra-picture directions, compared with only 9 for H.264/AVC.
HEVC includes Adaptive Motion Vector Prediction, a new method to improve inter-prediction.
An improved deblocking filter
Sample Adaptive Offset – an additional filter that reduces artifacts at block edges
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