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{{Short description|none}} <!-- This short description is INTENTIONALLY "none" - please see WP:SDNONE before you consider changing it! -->
'''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
==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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{| class="wikitable
|+ Tiers and levels with maximum property values<ref name=HEVCITURecommendationH265/><ref name=
|-
!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 (
!colspan="2"| Max bit rate for Main 12<br>profile (
!colspan="2"| Max bit rate for Main 4:4:4 12<br>profile (
!colspan="2"| Max bit rate for Main 4:4:4 16<br>Intra profile (
!colspan="2"| Max bit rate for High Throughput<br>4:4:4 16 Intra<br>profile (1000bit/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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!colspan="2"| Max number of tile{{Ref label|Tiles|F|F}}
|-
! Main tier
! High tier
! Main tier
! High tier
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| 384
| -
|
| -
| 12,288
| -
| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 128×96@33.7 (6) </div> 176×144@15.0 (6)
Line 60 ⟶ 66:
| -
| 12,000
| -
| 144,000
| -
| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 176×144@100.0 (16) <br> 320×240@45.0 (6) <br> 352×240@37.5 (6) </div> 352×288@30.0 (6)
Line 77 ⟶ 85:
| -
| 24,000
| -
| 288,000
| -
| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 320×240@90.0 (12) <br> 352×240@75.0 (12) <br> 352×288@60.0 (12) <br> 352×480@37.5 (6) <br> 352×576@33.3 (6) </div> 640×360@30.0 (6)
Line 94 ⟶ 104:
| -
| 48,000
| -
| 576,000
| -
| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 352×480@84.3 (12) <br> 352×576@75.0 (12) <br> 640×360@67.5 (12) <br> 720×480@42.1 (8) <br> 720×576@37.5 (8) </div> 960×540@30.0 (6)
Line 111 ⟶ 123:
| -
| 80,000
| -
| 960,000
| -
| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 720×480@84.3 (12) <br> 720×576@75.0 (12) <br> 960×540@60.0 (8) </div> 1280×720@33.7 (6)
Line 129 ⟶ 143:
| 96,000
| 240,000
| 1,152,000
| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 1,280×720@68.0 (12) <br> 1,280×1,024@51.0 (8) <br> 1,920×1,080@32.0 (6) </div> 2,048×1,080@30.0 (6)▼
| 2,880,000
▲| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 1,280×720@68.0 (12
| 4
| rowspan="2" | 75
Line 145 ⟶ 161:
| 160,000
| 400,000
| 1,920,000
| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 1,280×720@136.0 (12) <br> 1,280×1,024@102.0 (8) <br> 1,920×1,080@64.0 (6) </div> 2,048×1,080@60.0 (6)▼
| 4,800,000
▲| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 1,280×720@136.0 (12
| 4
|-
Line 159 ⟶ 177:
| 200,000
| 800,000
| 2,400,000
| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 1,920×1,080@128.0 (16) <br> 2,048×1,024@127.5 (16) <br> 2,048×1,080@120.0 (16) <br> 2,048×1,536@85.0 (12) <br> 2,560×1,920@54.4 (8) <br> 3,672×1,536@46.8 (8) <br> 3,840×2,160@32.0 (6) </div> 4,096×2,160@30.0 (6)▼
| 9,600,000
▲| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 1,920×1,080@128.0
| 6
| rowspan="3" | 200
Line 175 ⟶ 195:
| 320,000
| 1,280,000
| 3,840,000
| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 1,920×1,080@256.0 (16) <br> 2,048×1,024@255.0 (16) <br> 2,048×1,080@240.0 (16) <br> 2,048×1,536@170.0 (12) <br> 2,560×1,920@108.8 (8) <br> 3,672×1,536@93.7 (8) <br> 3,840×2,160@64.0 (6) </div> 4,096×2,160@60.0 (6)▼
| 15,360,000
▲| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 1,920×1,080@256
| 8
|-
Line 188 ⟶ 210:
| 480,000
| 1,920,000
| 5,760,000
| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 1,920×1,080@300.0 (16) <br> 2,048×1,024@300.0 (16) <br> 2,048×1,080@300.0 (16) <br> 2,048×1,536@300.0 (12) <br> 2,560×1,920@217.6 (8) <br> 3,672×1,536@187.5 (8) <br> 3,840×2,160@128.0 (6) </div> 4,096×2,160@120.0 (6)▼
| 23,040,000
▲| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 1,920×1,080
| 8
|-
Line 202 ⟶ 226:
| 480,000
| 1,920,000
| 5,760,000
| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 3,840×2,160@128.0 (16) <br> 4,096×2,048@127.5 (16) <br> 4,096×2,160@120.0 (16) <br> 4,096×2,304@113.3 (12) <br> 7,680×4,320@32.0 (6) </div> 8,192×4,320@30.0 (6)▼
| 23,040,000
▲| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 3,840×2,160@128.0
| 8
| rowspan="3" | 600
Line 218 ⟶ 244:
| 960,000
| 3,840,000
| 11,520,000
| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 3,840×2,160@256.0 (16) <br> 4,096×2,048@255.0 (16) <br> 4,096×2,160@240.0 (16) <br> 4,096×2,304@226.6 (12) <br> 7,680×4,320@64.0 (6) </div> 8,192×4,320@60.0 (6)▼
| 46,080,000
▲| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 3,840×2,160@256
| 8
|-
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| 1,920,000
| 6,400,000
| 23,040,000
| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 3,840×2,160@300.0 (16) <br> 4,096×2,048@300.0 (16) <br> 4,096×2,160@300.0 (16) <br> 4,096×2,304@300.0 (12) <br> 7,680×4,320@128.0 (6) </div> 8,192×4,320@120.0 (6)▼
| 76,800,000
▲| <div class="mw-collapsible" id="mw-customcollapsible-HEVCTiersLevels"> 3,840×2,160
| 6
|}
:{{note label|MaxBitRate|A|A}} The maximum bit rate of the profile is based on the combination of bit depth, chroma sampling, and the type of profile.<ref name=
:{{note label|MaxFrameRate|B|B}} The maximum frame rate supported by HEVC is 300 [[frames per second]] (fps).<ref name=HEVCITURecommendationH265/>
:{{note label|MaxDpbSize|C|C}} The MaxDpbSize, maximum number of pictures in the [[High Efficiency Video Coding#Decoded picture buffer|decoded picture buffer]], for the maximum luma picture size of that level is 6 for all levels.<ref name=OverviewHEVCIEEE2012/><ref name=HEVCITURecommendationH265/> The MaxDpbSize can increase to a maximum of 16 frames, if the luma picture size of the video is smaller than the maximum luma picture size of that level, in incremental steps of 4/3×, 2×, or 4×.<ref name=OverviewHEVCIEEE2012/><ref name=HEVCITURecommendationH265/>
:{{note label|MinCR|D|D}} The MinCR, minimum compression ratio, for that level.<ref name=HEVCITURecommendationH265/> The MinCR constraint is reduced to half its base value for the 4:2:2 and 4:4:4 chroma sampling profiles and is reduced by an additional half for the Intra profiles.<ref name=
:{{note label|Slices|E|E}} The maximum number of slice segments is the number of slices allowed per picture at both the maximum resolution and maximum frame rate.<ref name=HEVCITURecommendationH265/><ref name=HEVCOctober2012K0201>{{cite news |title=AHG9: on number of slices constraint |author=Minhua Zhou |publisher=JCT-VC |url=http://phenix.it-sudparis.eu/jct/doc_end_user/current_document.php?id=6572 |date=2012-10-01 |accessdate=2012-11-27}}</ref>
:{{note label|Tiles|F|F}} The maximum number of tiles allowed per picture.<ref name=HEVCITURecommendationH265/> The maximum number of tiles allowed per second is the maximum number of tiles allowed per picture times 120.<ref name=HEVCITURecommendationH265/><ref name=HEVCOctober2012K0202>{{cite news |title=AHG9: on number of tiles constraint |author=Minhua Zhou |publisher=JCT-VC |url=http://phenix.it-sudparis.eu/jct/doc_end_user/current_document.php?id=6573 |date=2012-10-01 |accessdate=2012-11-27}}</ref>
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==See also==
*[[High Efficiency Video Coding]]
*[[
*[[Rec. 2020]] - ITU-R Recommendation for UHDTV
*[[H.264/MPEG-4 AVC]] - The predecessor video standard of HEVC
*[[VC-1]] - A video standard developed by Microsoft
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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]]▼
[[Category:Open standards covered by patents]]
[[Category:Ultra-high-definition television]]
[[Category:Video compression]]
[[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]]
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