Dolby Media Meter User's Manual - Minnetonka Audio

Dolby Media Meter Users Manual

Issue 6 Part Number 9110860

Dolby Laboratories Licensing Corporation

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ii Dolby Media Meter Users Manual

Confidential information for Dolby Laboratories Licensees only. Unauthorized use, sale, or duplication is prohibited.DolbyandthedoubleDsymbolareregisteredtrademarksofDolbyLaboratories.DialogueIntelligenceandDolbyDigitalPlusaretrademarksofDolbyLaboratories.Allothertrademarksremainthepropertyoftheirrespectiveowners.2014DolbyLaboratories.Allrightsreserved.

PartNumber9110860Issue6

S14/27180/28262

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Confidential Information

Table of Contents

Chapter 1 Dolby Media Meter Overview

Chapter 2 Installing Dolby Media Meter2.1 Installing Dolby Media Meter on a Mac...............................................................................32.2 Installing Dolby Media Meter on a PC ................................................................................42.3 Using the PACE iLok ..........................................................................................................4

Chapter 3 Measuring Loudness3.1 Measurement Modes: Short Term vs Infinite......................................................................8

3.1.1 Infinite Mode ............................................................................................................83.1.2 Short-Term Mode.....................................................................................................8

3.2 Measuring with the Stand-Alone Product ...........................................................................93.3 Measuring with the Plug-Ins .............................................................................................113.4 Measuring with the AudioSuite Plug-In.............................................................................123.5 File-Naming Conventions That Ensure Automatic File Selection .....................................13

Chapter 4 Configuring the Meter4.1 Measurement Algorithm ...................................................................................................164.2 Short-Term Window..........................................................................................................164.3 Peak Measurement Type .................................................................................................164.4 Level Meters .....................................................................................................................164.5 Limiter ...............................................................................................................................164.6 Measurements Displayed .................................................................................................164.7 Graphing...........................................................................................................................164.8 Warnings ..........................................................................................................................17

Chapter 5 Understanding the Log and the Graph5.1 Reading the Log ...............................................................................................................195.2 Viewing the Graph ............................................................................................................20

Appendix A Dolby Loudness Product ComparisonA.1 Measuring a Single Center Channel in a 5.1 Program .....................................................21A.2 Measuring a Stereo Program ...........................................................................................22A.3 Measuring with Dialogue Intelligence On and Speech Absent .........................................22A.4 Measuring a 5.1 Program .................................................................................................23

DolbyMedia Meter Users Manual i


ii DolbyMedia Meter Users Manual


List of Figures

Figure 1-1 Stand-Alone Meter Measuring a Set of Source Files ............................................................ 1Figure 3-1 Measurement Algorithm Choices in the Settings Window..................................................... 7Figure 3-2 Measurement Pane Showing Tenths .................................................................................... 8Figure 3-3 Short-Term Window Length Setting ...................................................................................... 9Figure 3-4 Stand-Alone Meter Measuring an Encoded File.................................................................... 9Figure 3-5 Dolby TrueHD Presentation Selector .................................................................................. 10Figure 3-6 Dolby Media Meter Plug-In Window .................................................................................... 11Figure 4-3 Settings Window.................................................................................................................. 15Figure 5-1 Sample Log File Beginning.................................................................................................. 19Figure 5-2 Sample Log File End ........................................................................................................... 19Figure 5-3 Sample Graph ..................................................................................................................... 20

Dolby Media Meter Users Manual iii

List of Figures Confidential Information

iv Dolby Media Meter Users Manual

Chapter 1

Dolby Media Meter Overview

WelcometotheDolbyMediaMeter,asoftwaretoolthatmeasuresloudnessinprogramming.Thistoolisidealforprogramcreation,qualitycontrol,andoptimizationofbroadcastanddiscmedia.

DolbyMediaMeterrunsonanAppleMacintoshorMicrosoftWindowssystemsapplicationandsupportstheseplugins:

AvidAudioExtension(AAX)withProTools AvidAudioSuitewithProTools VirtualStudioTechnology(VST)withNuendo VirtualStudioTechnology(VST)withSonySoundForge

Figure11

Figure 1-1 Stand-Alone Meter Measuring a Set of Source Files

Note: WenolongersupportAppleaudiounitsortheRealTimeAudioSuite(RTAS)format.

Dolby Media Meter Users Manual 1

Questions or Feedback

Ifyouhavequestionsorcommentsaboutthisdocument,contacttechnical publications.

Ifyouhavetechnicalquestionsaboutthisproductortechnology,contacttechnical support.

mailto:[email protected]?subject=DolbyMediaMeter2mailto:[email protected]

Chapter 2

Installing Dolby Media Meter

TheprocessofinstallingDolbyMediaMeterconsistsoftheserequiredsteps:

InstallingDolbyMediaMeteronaMac InstallingDolbyMediaMeteronaPC UsingthePACEiLok

2.1 Installing Dolby Media Meter on a MacToinstallDolbyMediaMeteronaMac:

1. Downloadthesoftwarefromwww.dolbycustomer.com.2. Readtheintroduction,thenclickContinue.3. Readthelicenseagreement.Youmaychoosetoprintandsaveitforyourrecords.

ClickContinuetoproceed.4. ClickAgreetoacceptthelicenseagreementandproceedwithinstallation.5. Selectadestinationdrive.ClickContinue.

Whenthesystemhascompletedtheinstallation,itautomaticallyopensyourWebbrowsertowww.dolbycustomer.com.Thissiteallowsyoutocreateanaccount,ifyouhavenotalreadydoneso.Withanaccountyoureceivenoticeoffuturereleasesanddownloadsofinstallersanddocumentation.

6. Whenyouareready,closethetechnicalsupportwindowandclickCloseontheinstallertocompletetheinstallation.

Note: IfyouplantouseDolbyMediaMeterwithadigitalaudioworkstation,werecommendyouinstalltheworkstationbeforeyouinstallthesoftware.

Note: TheDolbyMediaMeterapplicationanddocumentationautomaticallyinstallsintotheApplications/Dolby/Dolby Media Meter folderontheMacintoshharddrive.Youcanmoveittoanotherlocationafterinstallation.Pluginsinstallinvariouslocationsasrequiredbyyourdigitalaudioworkstation.Youshouldnotchangethelocationoftheseplugins.

Note: SomeapplicationssuchasSonySoundForgemightrequireyoutonavigatetotheVSTfoldertobeginusingtheDolbyMediaMeterVSTplugin.VSTpluginsareinstalledto: /Library/Audio/Plug-ins/VST.


http://www. dolbycustomer.com


2.2 Installing Dolby Media Meter on a PCToinstallDolbyMediaMeteronaPC:

1. Downloadthesoftwarefromwww.dolbycustomer.com2. Readtheintroduction,thenclickNext.3. ClickI accept the terms in the license agreement.ClickNexttoproceed.

TheDolbyMediaMeterapplicationanddocumentationautomaticallyinstallsinC:\Program Files\Dolby\Dolby Media Meter,thenplacesiconsonthedesktopandundertheStartmenu.Pluginsinstallinvariouslocationsasrequiredbyyourdigitalaudioworkstation.Youshouldnotchangethelocationoftheseplugins.

2.3 Using the PACE iLokThisapplicationusesPACEiLokantipiracysoftware.ThelicensestoredontheUSBiLokkeyauthorizesyoursystemtousetheapplication.NewcustomersshouldpurchaseaniLokfromilok.comandobtainacouponforaniLokauthorizationfromtheirreseller.

InserttheiLokintoanavailableUSBportbeforeopeningtheapplication.TheiLokkeymustremainintheUSBportwhilethesoftwareisinuse.

TheiLokwebsiteenablestoyoutomanagethelicensesforallyouriLokprotectedapplicationsinoneplace.

Toregisteryourlicense:

1. Gotoilok.com.2. Followthedirectionstosignupforafreeaccount.3. DownloadandinstalltheiLokclientsoftware.(Typicalinstallationsareadriverto

supporttheiLokkeyandiLokwebsitesecuritydrivers.)4. Logintoyouraccount.5. SynchronizeyouriLokwithyouraccount.

Note: AfterinstallingDolbyMediaMeter,youmustrestartyourPCbeforetheprogramcanbeused.

Note: Someapplications,suchasSonySoundForge,mightrequireyoutonavigatetotheVSTfoldertobeginusingtheDolbyMediaMeterVSTplugin.VSTpluginsareinstalledto:C:\Program Files\Steinberg\VstPluginson32bitoperatingsystemsandC:\Program Files (x86)\Steinberg\VstPluginson64bitoperatingsystems.

Note: CustomersupdatingfromanolderversioncancontinuetousethesameiLokauthorization.

4 Dolby Media Meter Users Manual

http://www.ilok.comhttp://www.ilok.com

Using the PACE iLok

6. ViewthelicensesonyournewlyregisterediLok.

7. AddandeditthenameoftheiLokfordifferentiationifyouownmultipleiLoks.

Consider Subscribing to iLok Zero DownTime Coverage

TheiLokZeroDownTimeprogramenablesiLokownerstoimmediatelyreplacelicensesincaseaniLokisbroken,lost,orstolen.Visitilok.comforprogramdetailsandrestrictions.

Note: IfyouhavebeengivenlicensecodesforyourDolbyapplications,theycanberedeemedonthelok.com sitefordownloadsynchronizationtoyourneworexistingiLokkey.

Caution: DonotloseyouriLok.Keepitassafeandsecureasyouwouldanyothervaluablepieceofequipment.LosingtheiLokisthesameaslosingtheentireproduct.


http://www.ilok.com



Chapter 3

Measuring Loudness

DifferencesinaudiolevelsbetweenprogramsandchannelsorbetweenprogramsandcommercialsareamajorannoyancetoTVviewers.Whileobvioustotheviewer,theseloudnessdifferenceshaveprovendifficulttomeasurewithconventionalmethodsandequipment.

Foryears,theaudioindustryhasquantifiedthelevelofitsprogrammingusingpeakprogrammeters(PPM)andvolumeunit(VU)meters.Itisimportanttonotethatbothweredevelopedandareusedtoreadsignalvoltages,andthereforemakenoattempttomeasuresubjectiveloudness.Thus,severaldifferentvoices,adjustedinlevelsothattheyalldeflectmeterstothesamemark,maysoundsomewhatdifferentinleveltothelistenerathome.Thisproblemisoftencompoundedbytherapidresponseofthemeter,whichrequiresalloperatorstoperformtheirownindividualvisualintegrationoraveragingofthemetermovementitself.

DolbyMediaMeterfeaturesDialogueIntelligencetechnology,adoptedfromtheawardwinningDolbyDP600andVM600ProgramOptimizer.Thetechnologyautomaticallydetectsandmeasuresloudnessonlyduringthepresenceofspeechinanaudiotrack.EnablingDialogueIntelligenceallowstheoperatortosimplyquantifyallthesectionsoftheprogramthatonlycontaineddialogueandusetheendingmeasurementvalueforanalysisand/ornormalizationpurposes.ThisvalueisalsocommonlyusedtosetthedialoguenormalizationparameterwithinDolbybitstreams.

DolbyMediaMeteroffersthreemeasurementalgorithmchoicesintheSettingswindow,asshowninFigure 31: Leq(A) ITURBS.17701 ITURBS.17702/17703

Figure31

Figure 3-1 Measurement Algorithm Choices in the Settings Window

EBUR128measurementsincludingintegratedloudness,shorttermloudness,andloudnessrangeareavailablewhenITU17702/ITU17703isselected.DialogueIntelligencecanbeusedwitheitherITURBS.17701orLeq(A).

YoucanmeasuretheloudnessofDolbyDigital,DolbyDigitalPlus,DolbyTrueHD,Dolby E,andPCMfiles.

Choosing a Measurement Precision

Youcanchangethedisplaytoshowmeasurementsintenthsorwholenumbers(units).Tomakethischange,rightclickthemeasurementpaneshowninFigure 32.ThenchooseeitherunitsortenthsfromtheDisplaycontextmenu.Thecurrentsettingismarked.


Measuring Loudness

Figure32

Figure 3-2 Measurement Pane Showing Tenths

3.1 Measurement Modes: Short Term vs InfiniteTheDolbyMediaMeterhastwomodesrelatingtothemeasurementperioditself:InfinitemodeandShortTermmode.Thefollowingsectionsdescribetheirbehavior.

3.1.1 Infinite Mode

Infinitemode1istypicallyusedwhenitispossibletomeasuretheentiredurationoftheprogram(forexample,all30secondsofacommercialoracompletetwohourmovie).Infinitemodeprovidesthemostaccuratemeasurement,asitisabletoaverageloudnessoverthecompleteprogramlength.Thismodeismostoftenusediningest,qualitycontrol(QC),andpostproductionapplicationswhereaudiometadataisbeingauthoredandlevelscan,inmostcases,becontrolledandadjusted.

ItisalsopossibletouseInfinitemodetomeasureshorterindividualsectionsofaprogramratherthantheentireduration.Thismethodmayallowtheoperatortofindameasurementvaluemuchmorequickly.Inthiscase,however,theoperatormustensurethattheloudnesslevelsofthesectionsbeingmeasuredarerepresentativeoftheentireprogram.

3.1.2 Short-Term Mode

ShortTermmodedisplaysthemeasuredvalueforthepreviousfewsecondsasaslidingwindowtypeoffunction.UsingDialogueIntelligence,forexample,thefirstmeasurementvalueisforthetimebetween0and10seconds,thenextbetween1and11seconds,nextbetween2and12seconds,andsoforth.UsingEBUR128,themeasurementsareforthreeseconds,ratherthanten.

AstheShortTermmodemeasuresonlytheimmediatelyprecedingtensecondsofprogrammaterial,themeasurementvaluehasthepotentialtobemuchmoredynamicthanthevalueprovidedbyInfinitemodemeasurementforthesamecontent.(Highlyprocessedchannelsandprogrammingwillmostlikelynotexhibitthistypeofbehavior.)

ThebenefitofmeasuringinShortTermmodeisthattheoperatorcanseeshorttermvariationsinloudnesslevel(orshorttermvariationsindialoguelevelwhenDialogueIntelligenceisenabled)withinaprogram.ManyskilledaudiooperatorsprefertousetheShortTermmodemeasurement.Theyfindtheinformationonneartermdynamicstobe

1 EBUR128usesthetermIntegratedinsteadofInfinite.


Measuring with the Stand-Alone Product

veryusefulwhenmixingorproducingaprogram,andtheyarecapableofmanagingoverallprogramloudnessbyreadingtheshorttermmeasure.

ShortTermmodeisalsoveryusefulformeasuringandloggingthedynamicloudnesshistoryofagivenprogramduringtheQCorpostproductionprocess,orinaparticulartelevisionserviceorchannelinacableheadendfacility.

Choosing a Short-Term Window Length

Somestandardsallowachoiceofshorttermwindowlength,eitherthreeortenseconds.MediaMeterincludesasettingforthischoice,asshowninFigure 33.

Figure33

Figure 3-3 Short-Term Window Length Setting

3.2 Measuring with the Stand-Alone ProductThestandaloneDolbyMediaMeterapplicationmeasuressourceandencodedfiles.Thesoftwareanalyzestheinput,thendisplaysthemeasuredresultsforuseindeterminingtheproperdialnormmetadatavaluetouseduringencoding.ThisisusefulforDVDandBlurayDiscpostproduction,broadcastfacilities,videoondemand(VOD),moviedownloadservices,andvideogames.

Beforeyoubegintomeasure,checkthedefaultvaluesontheDolbyMediaMetersettingsscreendiscussedinChapter 4.

Figure34

Figure 3-4 Stand-Alone Meter Measuring an Encoded File

Tomeasuretheloudnessofanencodedfileorasourcefileset:

1. ClicktochooseeitherSource filesoranEncoded file.


Measuring Loudness

2. Identifytheinputfileorfiles,eitherbybrowsingthenetwork,orbytypingafilenameandlocationintothenamefield.AsinotherDolbyMediaProducerapplications,thefileselectorisintelligent.Whenyoudoubleclickasourcefile,DolbyMediaMeterrecognizesandselectstheentiresetwhenthesetfollowsthenamingconventionsdescribedinFileNamingConventionsThatEnsureAutomaticFileSelection.

3. ClickEnableifyouwanttocreatealogfileofthismeasurement.Reviewthedefaultlogfilenameandlocation,andmakeanyrequiredmodifications.Bydefault,theDolbyMediaMeternamesthelogfilesinput file name-LoudnessEstimation.csvandsavesthefileinthedirectorywheretheinputfilesarestored.SeeReadingtheLogformoredetailsaboutthelogfunction.

4. ClickSpecify Rangetomeasureonlypartoftheselectedfile.Unlessarangeisspecifiedhere,DolbyMediaMetermeasurestheentirefile.Iftimecodeisembeddedinthefiles,themeterwilldefaulttotimecode.Iftimecodeisnotpresent,themeterwilldefaulttorealtime.Highlighteitherorboththebeginningandendfields,andtypenewvaluestochangethem.DolbyMediaMetersupportsallcommonvideoframerates,aswellasframes,seconds,andsamples,inadditiontorealtimemeasurement.

5. ClickMeasuretostartprocessing.

DolbyMediaMeterdisplaysapercentagecompletetallyandprogressbarduringprocessing.Duringmeasurement,theMeasurebuttonchangestoCancel.

Whenmeasuringencodedfiles,DolbyMediaMetercandisplayuptofourdifferentmeasurementtypessimultaneously,asshowninFigure 34.Choosethefromthenineavailableoptionsbyrightclickinginameasurementbox.

Whenmeasurementfinishes,youcanreadthelogorviewthegraph.Formoreinformation,seeReadingtheLogorViewingtheGraph.

Additional Selectors for Dolby TrueHD and Dolby E

WhenaDolbyTrueHDfileischosen,DolbyMediaMeterdisplaystheadditionalselectorshowninFigure 35,allowingyoutochoosewhichpresentationDolbyMediaMetershouldmeasure.Theselectorlistsonlyindependentanddownmixedpresentations.Copiesarenotdisplayed,astheirvaluewouldbeidenticaltothepresentationofwhichtheywereacopy.

Figure35

Figure 3-5 Dolby TrueHD Presentation Selector

WhenaDolbyEfilecontainingmorethanoneprogramisselected,DolbyMediaMeterallowsyoutochoosewhichprogramDolbyMediaMetershouldmeasure.TheselectorlistsonlytheprogramsthatexistintheselectedDolbyEstream.

Note: LargeDolbyTrueHDfilesmaytakealittlelongertoopenthanotherfiletypesbecauseDolbyMediaMetermustexaminetheentirefilebeforebeginningtomeasureit.


Measuring with the Plug-Ins

Inbothcases,measurementdoesnotproceeduntilyouhaveindicatedachoice.

3.3 Measuring with the Plug-InsAsanAAXorVSTplugin,DolbyMediaMetermeasuresloudnessinrealtime,lettingyoutracklevelsduringthemixingprocesstoaidinmeetingnetworkdeliveryrequirements.DolbyMediaMetercansimultaneouslydisplayuptosevenoftheninepossiblemeasurementsdescribedinMeasurementsDisplayed.Chooseameasurementtodisplaybyrightclickinginameasurementboxandchoosingfromthecontextmenu.Figure 36showsapluginexample.

Figure 3-6 Dolby Media Meter Plug-In Window

DolbyMediaMeterAAXorVSTplugininsertionisperformedonachannelbychannelbasisoninputchannels.Onoutputbuses,themetermaybeinsertedonmono,stereo,ormultichannelbuses.Thenumberofinstancesisnotlimited.

WhenyoumeasurewiththeAAXandVSTplugins,DolbyMediaMeterdoesnotaddtotheinfinitevaluewhilethesessionisstoppedorpaused.Youcanmovealongthesessiontimelineandaddtotheinfiniteaveragebyplayingthroughdifferentsections.Doingsoallowsyoutoaverageovertheentiretimeyouworkonyoursession.Inaddition,thelogfilewillreferencethemeasuremententrieswithanindicationofboththetimecodeofthepartofthesessionbeingmeasuredandthetimeofdaythemeasurementwastaken.

WhenyoumeasurewithAAXandVSTplugins,thegraphdisplaysinrealtime.

Resetting Measurements

ClickReset Alltorestarttheallmeasurements.ClickReset Infinitetoresetonlytheinfinitemeasurement.ResetthedialoguerangeandpeakmeasurementsbyclickingtheResetbuttonbeneaththeappropriatereadout.ClickingLogdisplaysthelogfile.

Note: ProToolsalwaysinsertsAAXandAudioSuitepluginsasprefader.MeasurementswillnotcorrectlymatchthefinalmixedoutputifthemeterisinsertedontheinputsectionofProToolswhenmixautomationispresent.


Measuring Loudness

3.4 Measuring with the AudioSuite Plug-InTheDolbyMediaMeterAudioSuitepluginperformsfilebasedmeasurement,idealformeasuringdialnormvaluesoroverallloudnesswhilepreparingaudioforpackagedmediaformats.

WhenmeasuringwiththeAudioSuitemeter,selectasectionofyoursessiontomeasureinnonrealtimeandpresseithertheRenderorAnalyze button.

UsingtheRender buttontomeasureloudnesscreatesanewaudiofile.(Unlessyouareprocessingthefilewiththelimiter,youmaywishtomanuallydeleteit.)UsingtheAnalyze button,however,performsthesamemeasurementwithoutcreatinganewaudiofile.

Toaveragethemeasurementsofdifferentsections,selectanewsectionofyourtimeline,andpresstheRenderor Analyze buttonagain.Thatsectionwillbeaveragedintothepreviousmeasurement.Ifyoudonotwishtoaveragethedifferentsections,presstheResetbuttonbeforepressingtheRenderor Analyze button.

Ifyouchoosetocreatealogfile,thelogfilewillreferencethemeasuremententriesbyindicatingthetimecodeofthepartofthesessionbeingmeasured.Thisfunctionwillallowyoutotellwhichpartofyoursessionisrepresentedbythegivenmeasurement.

TheAudioSuiteplugincandisplaycansimultaneouslydisplayuptosevenoftheninepossiblemeasurementsdescribedinMeasurementsDisplayed.Chooseameasurementtodisplaybyrightclickinginameasurementboxandchoosingfromthecontextmenu.

TomeasurefasterthanrealtimeintheAudioSuiteplugin:

1. ClickResettorestartthemeasurements.2. ClickLog FiletogenerateandsavealogofDolbyMediaMeteractivity.Reviewthe

defaultfilenameandlocation,andmakeanynecessarychanges.3. Choosethedesiredmeasurementtypes,byrightclickinginameasurementboxand

choosinganotheroptionfromthecontextmenu.4. ClicktheAnalyzeorRenderbutton.

Note: Whenmeasuringmultichannelinputchannels,besuretoselectthechannelroutinginthesettingwindowthatmatchesyoursession.

Note: RememberthatProToolsalwaysinsertsAAXandAudioSuitepluginsasprefader.MeasurementswillnotcorrectlymatchthefinalmixedoutputifthemeterisinsertedontheinputsectionofProToolswhenmixautomationispresent.


File-Naming Conventions That Ensure Automatic File Selection

3.5 File-Naming Conventions That Ensure Automatic File Selection

DolbyMediaMeterautomaticallyselectssourcefilesetsthatfollowthesenamingrules:

1. AllthechannelIDsusedarestandard.ThechannelIDsarenotcasesensitive.2. ThechannelIDisseparatedbeforeandafterwitheitheraperiodorunderscore.3. ThefilenamesforthechannelsareidenticalexceptforchannelID.4. ThenumberoffilesmatchesthenumberofchannelsselectedintheclientChannels

tab.5. ThefilechannelIDsmatchthechannelIDsselectedintheclientChannelstab.6. Filenamesdonotcontaintheampersand(&)character.

Thefollowingsectionsprovidefourexamplesoffilesetsthatwouldbeautomaticallyselected.

Example 1

Thisfilesetusesaperiodastheseparator.

ExampleOne.L.wav ExampleOne.R.wav ExampleOne.C.wav ExampleOne.LFE.wav ExampleOne.Ls.wav ExampleOne.Rs.wav

Example 2

Thisfilesetusesanunderscoreastheseparator.

ExampleTwo_L.wav ExampleTwo_R.wav ExampleTwo_C.wav ExampleTwo_LFE.wav ExampleTwo_Ls.wav ExampleTwo_Rs.wav

Example 3

Inthisfileset,thechannelIDisnotthelastelementinthefilename.Thefilesetusesaperiodastheseparator.

ExampleThree.L.ENG.wav ExampleThree.R.ENG.wav ExampleThree.C.ENG.wav

Caution: Filenamesincludingtheampersand(&)charactercannotbeprocessedbytheDolbyMediaMeter.


Measuring Loudness

ExampleThree.LF.ENG.wav ExampleThree.LS.ENG.wav ExampleThree.RS.ENG.wav

Example 4

Inthisfileset,thechannelIDagainisnotthelastelementinthefilename.Thefilesetusesanunderscoreastheseparator.

ExampleFour_L_ENG.wav ExampleFour_R_ENG.wav ExampleFour_C_ENG.wav ExampleFour_SW_ENG.wav ExampleFour_LS_ENG.wav ExampleFour_RS_ENG.wav


Chapter 4

Configuring the Meter

DolbyMediaMeteroffersyouawiderangeofchoiceaboutwhatandhowyoumeasure.Thischapterexplainsthechoices.

ToconfigureDolbyMediaMeter,clickthesettingsicon,whichshowsthreesliders.Inthestandaloneapplication,itappearsinthefarbottomleftcorner,asshowninFigure 41.Intheplugins,itisattheleftunderneaththeDolbylogo,asshowninFigure 42.

ThesystemopenstheDolbyMediaMetersettingswindow,showninFigure 43.

Figure43

Figure44

Figure 4-3Settings Window

Figure41

Figure 4-1 Application Settings Button

Figure42

Figure 4-2 Plug-In Settings Button



4.1 Measurement AlgorithmChooseLeq(A),ITURBS.17701,orITURBS.17702/BS.17703,byclickingaradiobuttonatthetopofthesettingswindow.

4.2 Short-Term WindowChoosealengthforstandardsthatallowthisoption:threesecondsortenseconds.

4.3 Peak Measurement TypeYoucanchoosebetweenthedefaultpeakmeasurementtype,Sample Peak,andTrue Peak,whichincludespeaksthatoccurinbetweensamples.

4.4 Level Meters AlloftherealtimepluginsallowyoutoshowlevelmeterssimilartothoseintheDolbyMediaDecoderforeachchannelbeingmeasured.

4.5 LimiterDolbyMediaMeterallowsyoutoapplyapeaklimiter,whichisasamplepeakratherthantruepeak.UnlikemostDolbyMediaMeterfeatures,thislimiteractsonyourtracks.Youcansetthisvaluefrom0to51toaidinpreventingyourtracksfromexceedingtheselectedpeakvalue,helpingyoutomeetdeliveryspecifications.

4.6 Measurements DisplayedInthestandaloneapplication,youcandisplayanyfourmeasurementsinanyorder.Intheplugins,youcandisplayuptoseveninanyorder.

4.7 GraphingDolbyMediaMeterprovidesaflexiblegraphingfeaturetoaidinvisualizationofthemeasurementsitmakes.

Rightclickinginthegraphwindowopensacontextualmenuwithcommandsto:

Selectthemeasurementstobegraphed. Clearthegraphdisplay. Latchorunlatchthegraphdisplay. Printthegraphdisplay.Whenprintingthegraph,theprintedversionwillbeonly

whatiscurrentlydisplayedinthegraph.Noreadingoutsidethedisplaywillbeprinted.


Warnings

Resizing the Graph

ThegraphistheonlypartoftheDolbyMediaMeterdisplaythatcanberesized.Toresizeithorizontally,dragthebottomrightcornerofthewindowtotheright.Whenunlatchedfromtheplugins,thegraphcanberesizeduptofullscreen.

4.8 Warnings DolbyMediaMeterallowsyoutoconfigureseventypesofwarning:

Infinite Dialogue:TheTargetcanbesetfrom0to60.Positiveandnegativetolerancesareadjustablefrom0to60.

Short Term Dialogue:Boththeminimumandmaximumwarningcanrangefrom0to60.

Infinite All:TheTargetcanbesetfrom0to60.Positiveandnegativetolerancesareadjustablefrom0to60.

Integrated EBU R128:TheTargetcanbesetfrom0to60.Positiveandnegativetolerancesareadjustablein0.5dBincrements.

Loudness Range EBU R128:Themaximumcanbeadjustedfrom0to60. Peak Value:Themaximumcanbeadjustedfrom0to60. Leq(M) Value:Themaximumcanbeadjustedfrom72to96.

DolbyMediaMetersetsgenerallyacceptabledefaultvaluesforallthesewarnings,whichyoucanadjustasneeded.Warningsaretriggeredwhenthepositiveornegativetolerancevalue(ormaximum)hasbeenexceeded.

Whenawarningistriggered,DolbyMediaMeterdisplaysitintwoways:

Measurementwindowschangetheirdisplaycolorfromwhitetored. Thegraphwindowshowsaverticallineatthepointinthetimelinewhenthewarning

occurred.Thislineisaccompaniedbyahorizontallineatthebottomofthegraphthatextendsacrossallthetimetheerrorwasineffect,andiscoloredmatchedtothewarningtypethatoccurred.




Chapter 5

Understanding the Log and the Graph

DolbyMediaMeterenablesyoutoviewandsavebothagraphandlogfileforeachmeasurementyoumake.

5.1 Reading the LogWhenitprocessessourceorencodedfiles,DolbyMediaMetercreatesalogfilecontainingarecordofitsmeasurements.Thelogiscreatedasacommaseparatedvalues(.csv)file,allowingyoutoopenandsaveitinTextEdit,MicrosoftExcel,oranyotherspreadsheeteditor.

Figure51

Figure 5-1 Sample Log File Beginning

AsshowninFigure 51,thelogfilebeginswithcrucialinformationabouttheinput.Itstatesthenameandfilelocationfortheinputfileorfiles,itsaudiocodingmode,whetherDialogueIntelligenceisonoroff,andthechosenpeakcountthresholdvalue.

Figure52

Figure 5-2 Sample Log File End

AsshowninFigure 52,thelogfileendswiththemeasuredloudness,highestpeak,andthepercentageofspeechcontentfortheentirefileorfileset.

Inbetween,theloglistsseveralattributesforeachsecondofrealtime:

Timecode:Indicatesthesectionofthefilemeasured Date:Indicatesthecalendardateonwhichthemeasurementwasmade Timeofday:Indicatesthetimeofdaythemeasurementwasmade Dialoguepresent:Indicatesthechannelsthatcontaineddialogueornodialogue Themeasurementsyouchose Thewarningsyouchose Peak(dBFSordBTP):Indicatesthelargestpeakvaluemeasuredinthesection


Understanding the Log and the Graph

Peakcount:Indicatesthenumberofpeaksinthesectionthatexceededthepeakcountthresholdvalue

Thelogalwaysdisplaysmeasurementswiththeprecisionoftenthsofaunit.

5.2 Viewing the GraphAsshowninFigure 53,DolbyMediaMetercangraphuptosixmeasurementsoftheselectedfile:

Infinite Dialogue(withDialogueIntelligenceon) Short Term Dialogue(withDialogueIntelligenceon) Dialogue Range(withDialogueIntelligenceon) Infinite All(withDialogueIntelligenceoff) Short Term All(withDialogueIntelligenceoff) Sample PeakorTrue Peak(dependingonyourconfigurationchoice) Integrated EBU Short term EBU

Figure53

Figure 5-3 Sample Graph

Note: Themeasuredpeakvalueisanoverallpeak,notrelatedtotheselectionofDialogueIntelligence.


Appendix A

Dolby Loudness Product Comparison

DolbyMediaMetersupportsbothrealtimeandnonrealtimeapplications.TheinformationinthissectionprovidesadditionalinformationonhowtouseDolbyMeterforusersof:

DolbyLM100BroadcastLoudnessMeter DolbyDP600orVM600ProgramOptimizer.

A.1 Measuring a Single Center Channel in a 5.1 Program

LM100

Inpostproduction,theLM100typicallymeasuresasingleCenterchannelfromaPCMsourceaspartofaCenter/LFEAESpairfroma5.1channelprogram,selectingtheLeftchannelintheLM100setupmenu.AtypicalmethodofmeasuringaDolbyDigitalorDolbyEstreamistoselectonlytheCenterchannelintheLM100setupmenu.

Table A-1 Loudness Product Comparisons

Dolby Media Meter

(Stand Alone)

Dolby Media Meter

(AudioSuite)

Dolby Media Meter(VST) LM100* DP600/VM600*

Application Nonrealtime Nonrealtime Realtime Realtime NonrealtimeSupported Algorithms

ITURBS.17701ITURBS.17702ITURBS.17703Leq(A)




ITURBS.17701ITURBS.17703Leq(A)

Measurement Method

DialogueIntelligenceorEBUR128





PCM Monoto7.1 Monoto7.1 Monoto7.1 L,R,stereo Monoto5.1Dolby Digital Monoto5.1 N/A N/A L,R,C,stereo,all Monoto5.1Dolby Digital Plus

Monoto7.1 N/A N/A N/A Monoto7.1

Dolby TrueHD Monoto7.1 N/A N/A N/A N/ADolby E Monoto7.1 N/A N/A L,R,C,stereo,all Monoto7.1

Note: *ForproductsthatcontainDCblockingandpreemphasisfilters,disablethefilterstosupportITURBS.17703.Forproductswithoutthefilters,selectITURBS.17702tosupportITURBS.17703.


Dolby Media Meter

DolbyMediaMeterprovidesseveralmeasurementmethodscomparabletothatoftheLM100:

Whenmeasuringpremixedcontent(suchassoundtracksbeingencodedforDVDorBlurayDisc)intheDolbyMediaMeterAAXorAudioSuiteplugintheplugincanbeinsertedontheCenterchannelintheeditsectionofProTools.

Whenmeasuringnewcontentbeingmixedforbroadcast,theAAXplugincanbeinsertedontheoutputbus.(Inthiscase,soloingtheCenterchannelwouldmostcloselymimictheLM100method.)

IntheDolbyMediaMeterstandaloneapplication,theCenterchannelsourcefilecanbeselectedindividually.ThiscouldbeanexportedconsolidatedCenterchannel.

A.2 Measuring a Stereo Program

LM100

TheLM100canbesettomeasureastereoprogramfromanAESpair,DolbyE,orfromaDolbyDigitaltwochannelprogram.

Dolby Media Meter

DolbyMediaMeterprovidesseveralmeasurementmethodscomparabletothatoftheLM100:

IntheDolbyMediaMeterAAXplugin,theplugincanbeinsertedonthestereooutputbusofProTools.

IntheAudioSuiteplugin,theplugincanbeinsertedonthetwochannelinputfileintheProToolseditsectionforcontentthatisalreadymixedandbeingconformedforencoding(forexample,forDVDorBlurayDisc).

IntheDolbyMediaMeterstandaloneapplication,thetwochannelLeftandRightfiles,orthetwochannelencodedfile,canbeselected.

A.3 Measuring with Dialogue Intelligence On and Speech AbsentMeasuringaprogramwithDialogueIntelligenceenabledandnodetectedspeechresultsindifferentindicationsdependingonwhichDolbyproductyouuse.

TheLM100andtheDolbyMediaMeterAAXplugin,whichoperateasrealtimemeters,willdisplaytheflashingeariconuntildialogueisdetected.Ifnodialogueisdetected,thedisplaywillcontinuetoflashthroughouttheprogrammeasurement.

TheDolbyMediaMeterAudioSuiteandstandaloneversions,whichoperateasnonrealtimemeters,willdisplayNo Speech Detectedaftercompletionoftheprogrammeasurement.

TheDP600orVM600measurementcanbesettoreverttoanoverallloudnessmeasurement,asifDialogueIntelligencewasdisabled.


Measuring a 5.1 Program

A.4 Measuring a 5.1 ProgramDolbyMediaMeterusesthelatestadvancementsinmeasurementtechniques,asdoestheDP600orVM600.DolbyMediaMeterprovidesseveralmeasurementmethodscomparabletothatoftheDP600ortheVM600:

IntheDolbyMediaMeterAAXplugin,theplugincanbeinsertedonamultichanneloutputbusofProTools.

IntheAudioSuiteplugin,theplugincanbeinsertedonasetofmultichannelinputfilesintheProToolseditsection.

IntheDolbyMediaMeterstandaloneapplication,the5.1sourcechannelfiles,ora5.1channelencodedfile,canbeselected.

Note: RememberthatProToolsalwaysinsertsAAXandAudioSuitepluginsasprefader.InsertingthemeterontheinputsectionofProToolswhenmixautomationispresentwillnotgiveameasurementthatwillmatchthefinalmixedoutput.

Note: Whenmeasuringmultichannelinputchannels,besuretoselectthechannelroutinginthesettingwindowthatmatchesyoursession.


Dolby Media Meter OverviewInstalling Dolby Media MeterInstalling Dolby Media Meter on a MacInstalling Dolby Media Meter on a PCUsing the PACE iLok

Measuring LoudnessMeasurement Modes: Short Term vs InfiniteInfinite ModeShort-Term Mode

Measuring with the Stand-Alone ProductMeasuring with the Plug-InsMeasuring with the AudioSuite Plug-InFile-Naming Conventions That Ensure Automatic File Selection

Configuring the MeterMeasurement AlgorithmShort-Term WindowPeak Measurement TypeLevel MetersLimiterMeasurements DisplayedGraphingWarnings

Understanding the Log and the GraphReading the LogViewing the Graph

Dolby Loudness Product ComparisonA.1 Measuring a Single Center Channel in a 5.1 ProgramA.2 Measuring a Stereo ProgramA.3 Measuring with Dialogue Intelligence On and Speech AbsentA.4 Measuring a 5.1 Program

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Documents

Dolby Media Meter User's Manual - Minnetonka Audio