High Efficiency Video Coding tiers and levels: Difference between revisions

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'''High Efficiency Video Coding tiers and levels''' are constraints that define a [[High Efficiency Video Coding]] (HEVC) bitstream in terms of maximum bit rate, maximum luma sample rate, maximum luma picture size, minimum compression ratio, maximum number of slices allowed, and maximum number of tiles allowed.<ref name=OverviewHEVCIEEE2012>{{cite news |title=Overview of the High Efficiency Video Coding (HEVC) Standard |author=G.J. Sullivan |author2=J.-R. Ohm |author3=W.-J. Han |author4=T. Wiegand |author4-link=Thomas Wiegand |publisher=IEEE Trans. on Circuits and Systems for Video Technology |url=http://iphome.hhi.de/wiegand/assets/pdfs/2012_12_IEEE-HEVC-Overview.pdf |format=PDF |date=2012-05-25 |accessdate=2012-09-14}}</ref><ref name=HEVCITURecommendationH265>{{cite news |title=H.265 : High efficiency video coding |publisher=ITU |url=http://www.itu.int/rec/T-REC-H.265|date=2013-06-07 |accessdate=2013-06-07}}</ref> Lower tiers are more constrained than higher tiers and lower levels are more constrained than higher levels.<ref name=OverviewHEVCIEEE2012/><ref name=HEVCITURecommendationH265/>

==Tiers==

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The HEVC standard defines thirteen levels.<ref name=OverviewHEVCIEEE2012/><ref name=HEVCITURecommendationH265/> A level is a set of constraints for a bitstream.<ref name=OverviewHEVCIEEE2012/><ref name=HEVCITURecommendationH265/> For levels below level 4 only the Main tier is allowed.<ref name=OverviewHEVCIEEE2012/><ref name=HEVCITURecommendationH265/> A decoder that conforms to a given tier/level is required to be capable of decoding all bitstreams that are encoded for that tier/level and for all lower tiers/levels.<ref name=OverviewHEVCIEEE2012/><ref name=HEVCITURecommendationH265/>

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|+ Tiers and levels with maximum property values<ref name=HEVCITURecommendationH265/><ref name=HEVCJuly2014R1013>{{cite news |title=Draft high efficiency video coding (HEVC) version 2, combined format range extensions (RExt), scalability (SHVC), and multi-view (MV-HEVC) extensions |author=Jill Boyce |author-link=Jill Boyce|author2=Jianle Chen |author3=Ying Chen |author4=David Flynn |author5=Miska M. Hannuksela |author6=Matteo Naccari |author7=Chris Rosewarne |author8=Karl Sharman |author9=Joel Sole |author10=Gary J. Sullivan |author11=Teruhiko Suzuki |author12=Gerhard Tech |author13=Ye-Kui Wang |author14=Krzysztof Wegner |author15=Yan Ye |publisher=JCT-VC |url=http://phenix.it-sudparis.eu/jct/doc_end_user/current_document.php?id=9466 |date=2014-07-11 |accessdate=2014-07-11}}</ref>

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!rowspan="2"| Level

!rowspan="2"| Max luma sample rate<br>(samples/s)

!rowspan="2"| Max luma picture size<br>(samples)

!colspan="2"| Max bit rate for Main<br>and Main 10 profiles (bits1000bit/s){{Ref label|MaxBitRate|A|A}}

!colspan="2"| Max bit rate for Main 12<br>profile (bits1000bit/s)

!colspan="2"| Max bit rate for Main 4:4:4 12<br>profile (bits1000bit/s)

!colspan="2"| Max bit rate for Main 4:4:4 16<br>Intra profile (bits1000bit/s)

!colspan="2"| Max bit rate for High Throughput<br>4:4:4 16 Intra<br>profile (bits1000bit/s)

!rowspan="2"| Example picture resolution @<br>highest frame rate{{Ref label|MaxFrameRate|B|B}}<br>(MaxDpbSize{{Ref label|MaxDpbSize|C|C}}) <div class="mw-customtoggle-HEVCTiersLevels" style="color:#0B0080; cursor: pointer; border: 1px solid #aaa; border-radius: 10px; padding: 2px;">Click here to hide/show<br>additional examples</div>

!rowspan="2"| MinCR{{Ref label|MinCR|D|D}}

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[[Category:Computer file formats]]

[[Category:Graphics file formats]]

[[Category:IEC standards]]

[[Category:ISO standards]]

[[Category:ITU-T recommendations]]

[[Category:High-definition television]]

[[Category:Lossy compression algorithms]]

[[Category:MPEG-H]]

[[Category:Open standards covered by patents]]

[[Category:Ultra-high-definition television]]

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[[Category:Video codecs]]

[[Category:Videotelephony]]

[[Category:ITU-T recommendations]]

[[Category:ITU-T H Series Recommendations]]

[[Category:H.26x]]

[[Category:ISO standards]]

[[Category:MPEG-H]]

[[Category:IEC standards]]