Dolby Media Meter 2 User's Manual

8/12/2019 Dolby Media Meter 2 User's Manual

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Dolby Media Meter 2

Users Manual

Issue 3 Part Number 9110860


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ii DolbyMedia Meter 2 Users Manual

Dolby Laborator ies, Inc.

Corporate Headquarters

DolbyLaboratories,Inc.100

Potrero

Avenue

SanFrancisco,CA 941034813 USATelephone4155580200Fax4158631373www.dolby.com

European Headquarters

DolbyLaboratories,Inc.WoottonBassettWiltshire SN48QJ EnglandTelephone441793842100

Fax

44

1793

842101

DISCLAIMEROFWARRANTIES:EQUIPMENTMANUFACTUREDBYDOLBYLABORATORIESISWARRANTEDAGAINSTDEFECTSINMATERIALSANDWORKMANSHIPFORAPERIODOFONEYEARFROMTHEDATEOFPURCHASE.THEREARENOOTHEREXPRESSORIMPLIEDWARRANTIESANDNOWARRANTYOFMERCHANTABILITYORFITNESSFORAPARTICULARPURPOSE,OROFNONINFRINGEMENTOFTHIRDPARTYRIGHTS(INCLUDING,BUTNOTLIMITEDTO,COPYRIGHTANDPATENTRIGHTS).

LIMITATIONOFLIABILITY:ITISUNDERSTOODANDAGREEDTHATDOLBYLABORATORIESLIABILITY,WHETHERINCONTRACT,INTORT,UNDERANYWARRANTY,INNEGLIGENCE,OROTHERWISE,SHALLNOTEXCEEDTHECOSTOFREPAIRORREPLACEMENTOFTHEDEFECTIVECOMPONENTSORACCUSEDINFRINGINGDEVICES,ANDUNDERNOCIRCUMSTANCESSHALLDOLBYLABORATORIESBELIABLEFORINCIDENTAL,SPECIAL,DIRECT,INDIRECT,ORCONSEQUENTIALDAMAGES(INCLUDING,BUTNOTLIMITEDTO,DAMAGETOSOFTWAREORRECORDEDAUDIOORVISUALMATERIAL),COSTOFDEFENSE,ORLOSSOFUSE,REVENUE,ORPROFIT,

EVEN

IF

DOLBY

LABORATORIES

OR

ITS

AGENTS

HAVE

BEEN

ADVISED,

ORALLY

OR

IN

WRITING,OFTHEPOSSIBILITYOFSUCHDAMAGES.

.

Dolbyand

the

double

D

symbol

are

registered

trademarks

of

Dolby

Laboratories.

Dialogue

Intelligence

is

a

trademarkofDolbyLaboratories.Allothertrademarksremainthepropertyoftheirrespectiveowners.2012DolbyLaboratories.Allrightsreserved.

PartNumber

9110860

Issue3S12/23665/25266
http://www.dolby.com/http://www.dolby.com/


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DolbyMedia Meter 2 Users Manual iii

Table of Contents

Chapter 1 Dolby Media Meter Overview ......................................................................................1

Chapter 2 Installing Dolby Media Meter

2.1 Installing Dolby Media Meter 2 on a Mac............................................................................3

2.2 Installing Dolby Media Meter on a PC ................................................................................3

2.3 Using the Dolby Media Producer iLok ................................................................................4

Chapter 3 Measuring Loudness

3.1 Measuring Equivalent Loudness ........................................................................................5

3.2 Measurement Modes: Short Term vs Infinite......................................................................6

3.2.1 Infinite Mode ............................................................................................................6

3.2.2 Short-Term Mode.....................................................................................................6

3.3 Measuring with the Stand-Alone Product ...........................................................................7

3.4 Measuring with the Plug-Ins ...............................................................................................9

3.5 Measuring with the AudioSuite Plug-In.............................................................................11

3.6 File-Naming Conventions That Ensure Automatic File Selection .....................................12

Chapter 4 Configuring the Meter

4.1 Measurement Algorithm ...................................................................................................174.2 Short-Term Window..........................................................................................................17

4.3 Peak Measurement Type .................................................................................................17

4.4 Level Meters .....................................................................................................................17

4.5 Limiter ...............................................................................................................................17

4.6 Measurements Displayed .................................................................................................17

4.7 Graphing...........................................................................................................................17

4.8 Warnings ..........................................................................................................................18

Chapter 5 Understanding the Log and the Graph

5.1 Reading the Log ...............................................................................................................19

5.2 Viewing the Graph ............................................................................................................20

Appendix A Dolby Loudness Product Comparison

A.1 Measuring a Single Center Channel in a 5.1 Program .....................................................21

A.2 Measuring a Stereo Program ...........................................................................................22

A.3 Measuring with Dialogue Intelligence On and Speech Absent .........................................22

A.4 Measuring a 5.1 Program .................................................................................................22


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DolbyMedia Meter 2 Users Manual iv

List of Figures

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

Figure 3-1 Measurement Algorithm Choices in the Settings Window..................................................... 5

Figure 3-2 Measurement Pane Showing Tenths .................................................................................... 6

Figure 3-3 Short-Term Window Length Setting ...................................................................................... 7

Figure 3-4 Stand-Alone Meter Measuring an Encoded File.................................................................... 8

Figure 3-5 Dolby TrueHD Presentation Selector .................................................................................... 9

Figure 3-6 Dolby Media Meter 2 RTAS Plug-In Window....................................................................... 10

Figure 4-1 Application Settings Button.................................................................................................. 15

Figure 4-2 Plug-In Settings Button........................................................................................................ 15

Figure 4-3 Settings Window.................................................................................................................. 16

Figure 5-1 Sample Log File Beginning.................................................................................................. 19

Figure 5-2 Sample Log File End........................................................................................................... 19

Figure 5-3 Sample Graph ..................................................................................................................... 20


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DolbyMedia Meter 2 Users Manual 1

Chapter 1

Dolby Media Meter Overview

WelcometotheDolbyMediaMeter2.DolbyMediaMeter2isasoftwaretoolformeasuringloudnessinprogramming.Itsanidealtoolforprogramcreationandqualitycontrol,andperfectforoptimizingbroadcastanddiscmedia.

DolbyMediaMeter2runsasanAppleMacintoshorMicrosoftWindowsstandaloneapplicationandasAvidProToolsAudioSuite,RealTimeAudioSuite(RTAS),SteinbergVirtualStudioTechnology(VST),andAppleAudioUnit(AU)plugins.

Figure 11

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


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2 DolbyMedia Meter 2 Users Manual

Dolby Media Meter Overview

Questions or Feedback

Ifyouhavequestionsorcommentsaboutthisdocument,pleasecontact technical publications.

Ifyouhavetechnicalquestionsaboutthisproduct/technology,pleasecontact technical

support.
mailto:[email protected]?subject=DolbyMediaMeter2mailto:[email protected]?subject=DolbyMediaMeter2mailto:[email protected]?subject=DolbyMediaMeter2mailto:[email protected]?subject=DolbyMediaMeter2mailto:[email protected]?subject=DolbyMediaMeter2mailto:[email protected]?subject=DolbyMediaMeter2mailto:[email protected]?subject=DolbyMediaMeter2


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Chapter 2

Installing Dolby Media Meter

TheprocessofinstallingDolbyMediaMeter2consistsoftworequiredsteps:

1. InstallingtheDolbyMediaMeter2software

2. ActivatingtheiLok

2.1 Install ing Dolby Media Meter 2 on a Mac

ToinstallDolbyMediaMeter2onaMac:

1. InserttheCDintotheopticaldrive.TheCDopensautomatically.

2. Readtheintroduction,thenclickContinue.

3. Readthelicenseagreement.Youmaychoosetoprintandsaveitforyourrecords.ClickContinuetoproceed.

4. ClickAgreetoacceptthelicenseagreementandproceedwithinstallation.5. Selectadestinationdrive.ClickContinue.

Whenthesystemhascompletedtheinstallation,itautomaticallyopensyourWebbrowsertowww.dolbysupport.com.Thesiteallowsyoutoopenanaccount,ifyouhavenotalreadydoneso,andtoregisteryourproduct.Registeringyourproductallowsyoutoreceivetechnicalsupportandnoticeoffutureupgrades.

6. Whenyouareready,closethetechnicalsupportwindowandclickCloseontheinstallertocompletetheinstallation.

2.2 Install ing Dolby Media Meter on a PC

Toinstall

Dolby

Media

Meter

2on

aPC:

1. InserttheCDintotheopticaldrive.TheCDopensautomatically.

2. Readtheintroduction,thenclickNext.

3. ClickIacceptthetermsinthelicenseagreement.ClickNexttoproceed.ThesystemautomaticallyinstallsDolbyMediaMeter2inC:\Program Files\Dolby MediaMeter\Dolby Media Meter,thenplacesiconsonthedesktopandundertheStartmenu.

Note: DolbyMediaMeter2isautomaticallyinstalledintotheApplications/Dolby MediaProducerfolderontheMacintoshharddrive.Youmaymoveitafterinstallation.

Note: AfterinstallingDolbyMediaMeter2,youmustrestartyourPCbeforetheprogramcanbeused.


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Installing Dolby Media Meter

2.3 Using the Dolby Media Producer iLok

OneiLokUSBsmartkeycontainingauniquelicenseispackagedalongwithyourDolbyMediaMeterCD.

Thelicense

stored

on

the

iLok

smart

key

authorizes

your

system

to

use

the

application.

InserttheiLokintoanavailableUSBportbeforeopeningtheapplication.TheiLokkeymustremainintheUSBportwhilethesoftwareisinuse.

TheiLokwebsiteallowstoyoutomanagethelicensesforallyouriLokprotectedapplicationsinoneplace.Registrationissimple.Toregisteryourlicense:

1. Gotoilok.com.

2. Followthe

directions

to

sign

up

for

afree

account.

3. DownloadandinstalltheiLokclientsoftware.

4. Logintoyouraccount.

5. SynchronizeyouriLokwithyouraccount.

6. ViewthelicensesonyournewlyregisterediLok.

7. AddandeditthenameoftheiLokfordifferentiationifyouownmultipleiLoks.

Consider Subscribing to iLok Zero Downtime Coverage

The

iLok

Zero

DownTime

program

enables

iLok

owners

to

immediately

replace

licenses

in

caseaniLokisbroken,lost,orstolen.Seeilok.comforprogramdetailsandrestrictions.

Caution: DonotloseyouriLok.Keepitassafeandsecureasyouwouldanyothervaluablepieceofequipment.LosingtheiLokisthesameaslosingtheentireproduct.
http://www.ilok.com/http://www.ilok.com/http://www.ilok.com/http://www.ilok.com/


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Chapter 3

Measuring Loudness

3.1 Measuring Equivalent Loudness

DifferencesinaudiolevelsbetweenprogramsandchannelsorbetweenprogramsandcommercialsareamajorannoyancetoTVviewers.Whileobvioustotheviewer,theseloudnessdifferenceshaveprovendifficulttomeasurewithconventionalmethodsandequipment.

Foryears,theaudioindustryhasquantifiedthelevelofitsprogrammingusingpeakprogrammeters(PPM)andvolumeunit(VU)meters.Itisimportanttonotethatbothweredeveloped

and

are

used

to

read

signal

voltages,

and

therefore

make

no

attempt

to

measure

subjectiveloudness.Thus,severaldifferentvoices,adjustedinlevelsothattheyalldeflectmeterstothesamemark,maysoundsomewhatdifferentinleveltothelistenerathome.Thisproblemisoftencompoundedbytherapidresponseofthemeter,whichrequiresalloperatorstoperformtheirownindividualvisualintegrationoraveragingofthemetermovementitself.

DolbyMediaMeter2featuresDialogueIntelligencetechnology,adoptedfromtheawardwinningDolbyDP600ProgramOptimizer,whichautomaticallydetectsandthenmeasuresloudnessonlyduringthepresenceofspeechinanaudiotrack.EnablingDialogueIntelligenceallowstheoperatortosimplyquantifyallthesectionsoftheprogramthatonlycontaineddialogueandusetheendingmeasurementvalueforanalysisand/or

normalizationpurposes.

This

value

is

also

commonly

used

to

set

the

dialogue

normalizationparameterwithinDolbybitstreams.

DolbyMediaMeter2offersthreemeasurementalgorithmchoicesinthesettingswindow,asshowninFigure 31:

ITURBS.17702

ITURBS.17701

Leq(A)Figure 31

Figure 3-1 Measurement Algorithm Choices in the Settings Window

EBUR128measurements,includingintegratedloudness,shorttermloudness,andloudnessrange,areavailablewhenITUBS.17702isselected.DialogueIntelligencecanbeusedwitheitherITURBS.17701orLeq(A).

YoucanmeasuretheloudnessofDolbyDigital,DolbyDigitalPlus,DolbyTrueHD,Dolby E,andPCMfiles.


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11/28

Measuring with the Stand-Alone Product


providedbyInfinitemodemeasurementforthesamecontent.(Highlyprocessedchannelsandprogrammingwillmostlikelynotexhibitthistypeofbehavior.)

ThebenefitofmeasuringinShortTermmodeisthattheoperatorcanseeshorttermvariationsinloudnesslevel(orshorttermvariationsindialoguelevelwhenDialogue

Intelligence

is

enabled)

within

a

program.

Many

skilled

audio

operators

prefer

to

use

the

ShortTermmodemeasurement,astheyfindtheinformationonneartermdynamicstobeveryusefulwhenmixingorproducingaprogram,andtheyarecapableofmanagingoverallprogramloudnessbyreadingtheshorttermmeasure.

ShortTermmodeisalsoveryusefulformeasuringandloggingthedynamicloudnesshistoryofagivenprogramduringtheQCorpostproductionprocess,orinaparticulartelevisionserviceorchannelinacableheadendfacility.

Choosing a Short-Term Window Length

Somestandardsallowachoiceofshorttermwindowlength,eitherthreeortenseconds.

DolbyMedia

Meter

includes

asetting

for

this

choice,

as

shown

in

Figure 3

3.

Figure 33

Figure 3-3 Short-Term Window Length Setting

3.3 Measuring with the Stand-Alone Product

ThestandaloneDolbyMediaMeter2applicationmeasuressourceandencodedfiles.Thesoftwareanalyzestheinput,thendisplaysthemeasuredresultsforuseindeterminingtheproperdi al nor mmetadatavaluetouseduringencoding.ThisisusefulforDVDandBlurayDiscpostproduction,broadcastfacilities,videoondemand(VOD),moviedownloadservices,andvideogames.

Beforeyoubegintomeasure,checkthedefaultvaluesontheDolbyMediaMetersettingsscreendiscussedinChapter 4.


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Measuring Loudness

Figure 34

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

Tomeasuretheloudnessofanencodedfileorasourcefileset:

1. ClicktochooseeitherSource filesoranEncoded file.

2. Identifytheinputfileorfiles,eitherbybrowsingthenetwork,orbytypingafilename

andlocation

into

the

namefield.

AsinotherDolbyMediaProducerapplications,thefileselectorisintelligent.Whenyoudoubleclickasourcefile,DolbyMediaMeter2recognizesandselectstheentiresetwhenthesetfollowsthenamingconventionsdescribedinSection 3.6.

3. ClickEnableifyouwanttocreatealogfileofthismeasurement.Reviewthedefaultlogfilenameandlocation,andmakeanyrequiredmodifications.

Bydefault,theDolbyMediaMeter2nameslogfilesinput file name-LoudnessEstimation.csvandsavesthefileinthedirectorywheretheinputfilesarestored.SeeSection 5.1formoredetailsaboutthelogfunction.

4. ClickSpecify Rangetomeasureonlypartoftheselectedfile.


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Measuring with the Plug-Ins


Unlessarangeisspecifiedhere,DolbyMediaMeter2measurestheentirefile.Iftimecodeisembeddedinthefiles,themeterwilldefaulttotimecode;iftimecodeisnotpresent,thethemeterwilldefaulttorealtime.Highlighteitherorboththebeginningandendfields,andtypenewvaluestochangethem.DolbyMediaMeter2supportsallcommonvideoframerates,aswellasframes,seconds,andsamples,inadditionto

real

time

measurement.

5. ClickMeasuretostartprocessing.

DolbyMediaMeter2displaysapercentagecompletetallyandprogressbarduringprocessing.Duringmeasurement,theMeasurebuttonchangestoCancel.

Whenmeasuringencodedfiles,DolbyMediaMeter2candisplayuptofourdifferentmeasurementtypessimultaneously,asshowninFigure 34.Choosethefromthenineavailableoptionsbyrightclickinginameasurementbox.

Whenmeasurementfinishes,youcanreadthelog(asdescribedinSection 5.1)orviewagraph(asdescribedinSection 5.2).

Addi tional Selectors for Dolby TrueHD and Dolby E

WhenaDolbyTrueHDfileischosen,DolbyMediaMeter2displaystheadditionalselectorshowninFigure 35,allowingyoutochoosewhichpresentationDolbyMediaMeter2shouldmeasure.Theselectorlistsonlyindependentanddownmixedpresentations.Copiesarenotdisplayed,astheirvaluewouldbeidenticaltothepresentationofwhichtheywereacopy.

Figure 35

Figure 3-5 Dolby TrueHD Presentation Selector

WhenaDolbyEfilecontainingmorethanoneprogramisselected,DolbyMediaMeter2allowsyoutochoosewhichprogramDolbyMediaMeter2shouldmeasure.TheselectorlistsonlytheprogramsthatexistintheselectedDolbyEstream.

Inbothcases,measurementdoesnotproceeduntilyouhaveindicatedachoice.

3.4 Measuring with the Plug-Ins

AsaProToolsRTASorVSTplugin,DolbyMediaMeter2measuresloudnessinrealtime,lettingyoutracklevelsduringthemixingprocesstoaidinmeetingnetworkdeliveryrequirements.DolbyMediaMeter2cansimultaneouslydisplayuptosevenoftheninepossiblemeasurementsdescribedinSection 4.6.Chooseameasurementtodisplaybyrightclickinginameasurementboxandchoosingfromthecontextmenu.Figure 36showsapluginexample.

Note: LargeDolbyTrueHDfilesmaytakealittlelongertoopenthanotherfiletypesbecauseMediaMeter2mustexaminetheentirefilebeforebeginningtomeasureit.


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15/28


16/28


Measuring Loudness

TomeasurefasterthanrealtimeintheAudioSuiteplugin:

1. ClickResettorestartthemeasurements.

2. ClickLog FiletogenerateandsavealogofDolbyMediaMeter2activity.Reviewthedefaultfilenameandlocation,andmakeanynecessarychanges.

3. Choosethedesiredmeasurementtypes,byrightclickinginameasurementboxandchoosinganotheroptionfromthecontextmenu.

3.6 File-Naming Conventions That Ensure Automatic Fi leSelection

DolbyMediaMeter2automaticallyselectssourcefilesetsthatfollowthesenamingrules:

1. AllthechannelIDsusedarestandard.ThechannelIDsarenotcasesensitive.

2. ThechannelIDisseparatedbeforeandafterwitheitheraperiodorunderscore.

3. ThefilenamesforthechannelsareidenticalexceptforchannelID.

4. ThenumberoffilesmatchesthenumberofchannelsselectedintheclientChannelstab.

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

Note: RememberthatProToolsalwaysinsertsbothRTASandAudioSuitepluginsasprefader.MeasurementswillnotcorrectlymatchthefinalmixedoutputifthemeterisinsertedontheinputsectionofProToolswhenmixautomationispresent.

Caution: Filenames

including

the

ampersand

(&)

character

cannot

be

processed

by

the

DolbyMediaProducersuite.


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File-Naming Conventions That Ensure Automatic File Selection


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

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


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Chapter 4

Configuring the Meter

DolbyMediaMeter2offersyouawiderangeofchoiceaboutwhatandhowyoumeasure.Thischapterexplainsthechoices.

ToconfigureDolbyMediaMeter2,clickthesettingsicon,whichshowsthreesliders.Inthestandaloneapplication,itappearsinthefarbottomleftcorner,asshowninFigure 41.Intheplugins,itisattheleftunderneaththeDolbylogo,asshowninFigure 42.

ThesystemopenstheDolbyMediaMeter2settingswindow,showninFigure 43.

Figure 41

Figure 4-1Application

Settings Button

Figure 42

Figure 4-2 Plug-In Settings

Button


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16


Figure 43

Figure 4-3 Settings Window


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Measurement Algorithm


4.1 Measurement Algorithm

ChooseLeq(A),ITURBS.17701,orITURBS.17702byclickingaradiobuttonatthetopofthesettingswindow.

4.2 Short-Term Window

Choosealengthforstandardsthatallowthisoption(threesecondsortenseconds).

4.3 Peak Measurement Type

Youcanchoosebetweenthedefaultpeakmeasurementtype,Sample Peak,andTrue Peak,whichincludespeaksthatoccurinbetweensamples.

4.4 Level Meters

AlloftherealtimepluginsallowyoutoshowlevelmeterssimilartothoseintheDolbyMediaDecoderforeachchannelbeingmeasured.

4.5 Limiter

Alloftherealtimepluginsallowyoutoapplyapeaklimiter.UnlikemostDolbyMediaMeter2features,thislimiteractsonyourtracks.Youcansetthisvaluefrom0to51toaidinpreventingyourtracksfromexceedingtheselectedpeakvalue,helpingyoutomeetdeliveryspecifications.

4.6 Measurements Displayed

Inthestandaloneapplication,youcandisplayanyfourmeasurementsinanyorder.Intheplugins,youcandisplayuptoseveninanyorder.

4.7 Graphing

DolbyMediaMeter2providesaflexiblegraphingfeaturetoaidinvisualizationofthemeasurementsitmakes.

Rightclickinginthegraphwindowopensacontextualmenuwithcommandsto:

Selectthemeasurementstobegraphed.

Clearthegraphdisplay.

Latchorunlatchthegraphdisplay.

Note: Determiningtrue

peaks

is

calculation

intensive.

You

may

notice

increased

CPU

resourceuseinrealtimeapplicationswhenyouchooseTrue Peak.


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Printthegraphdisplay.Whenprintingthegraph,theprintedversionwillbeonlywhatiscurrentlydisplayedinthegraph.Noreadingoutsidethedisplaywillbeprinted.

Resizing the Graph

ThegraphistheonlypartoftheDolbyMediaMeter2displaythatcanberesized.Toresizeithorizontally,dragthebottomrightcornerofthewindowtotheright.Whenunlatchedfromtheplugins,thegraphcanberesizeduptofullscreen.

4.8 Warnings

DolbyMediaMeter2allowsyoutoconfigureseventypesofwarning:

Infinite Dialogue:TheTargetcanbesetfrom0to60.Positiveandnegativetolerancesareadjustablefrom0to60.

Short Term Dialogue:Both

the

minimum

and

maximum

warning

can

range

from

0to

60.

Infinite All:TheTargetcanbesetfrom0to60.Positiveandnegativetolerancesareadjustablefrom0to60.

Integrated EBU R128:TheTargetcanbesetfrom0to60.Positiveandnegativetolerancesareadjustablefrom0to60.

Loudness Range EBU R128:Themaximumcanbeadjustedfrom0to60.

Peak Value:Themaximumcanbeadjustedfrom0to60.

Leq(M) Value:Themaximumcanbeadjustedfrom72to96.

DolbyMediaMeter2setsgenerallyacceptabledefaultvaluesforallthesewarnings,which

youcan

adjust

as

needed.

Whenawarningistriggered,DolbyMediaMeter2displaysitintwoways:

Measurementwindowschangetheirdisplaycolorfromwhitetored.

Thegraphwindowshowsaverticallineatthepointinthetimelinewhenthewarningoccurred.Thislineisaccompaniedbyahorizontallineatthebottomofthegraphthatextendsacrossallthetimetheerrorwasineffect,andiscoloredmatchedtothewarningtypethatoccurred.


23/28


Chapter 5

Understanding the Log and the Graph

DolbyMediaMeter2letsyouviewandsavebothagraphandlogfileforeachmeasurementyoumake.

5.1 Reading the Log

Whenitprocessessourceorencodedfiles,DolbyMediaMeter2createsalogfilecontainingarecordofitsmeasurements.Thelogiscreatedasacommaseparatedvalues

(.csv)

file,

allowing

you

to

open

and

save

it

in

TextEdit,

Microsoft

Excel

,

or

any

other

spreadsheeteditor.Figure 51

Figure 5-1 Sample Log File Beginning

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

Figure 52

Figure 5-2 Sample Log File End

AsshowninFigure 52,thelogfileendswiththemeasuredloudness,highestpeak,andthepercentageofspeechcontentfortheentirefileorfileset.


24/28


Understanding the Log and the Graph

Inbetween,theloglistsseveralattributesforeachsecondofrealtime:

Timecode:Indicatesthesectionofthefilemeasured

Date:Indicatesthecalendardateonwhichthemeasurementwasmade

Timeofday:Indicatesthetimeofdaythemeasurementwasmade

Dialoguepresent:

Indicates

the

channels

that

contained

dialogue

or

no

dialogue

Themeasurementsyouchose

Thewarningsyouchose

Peak(dBFS):Indicatesthelargestpeakvaluemeasuredinthesection

Peakcount:Indicatesthenumberofpeaksinthesectionthatexceededthepeakcountthresholdvalue

Thelogalwaysdisplaysmeasurementswiththeprecisionoftenthsofaunit.

5.2 Viewing the Graph

AsshowninFigure 53,DolbyMediaMeter2cangraphuptosixmeasurementsoftheselectedfile:

Infinite Dialogue(withDialogueIntelligenceon)

Short Term Dialogue(withDialogueIntelligenceon)

Dialogue Range(withDialogueIntelligenceon)

Infinite All(with

Dialogue

Intelligence

off)

Short Term All(withDialogueIntelligenceoff)

Sample PeakorTrue Peak(dependingonyourconfigurationchoice)Figure 53

Figure 5-3 Sample Graph

Note: Themeasuredpeakvalueisanoverallpeak,notrelatedtotheselectionofDialogueIntelligence.


25/28


Appendix A

Dolby Loudness Product Comparison

DolbyMediaMeter2comeswithbothrealtimeandnonrealtimeapplications.IfyouhaveusedeithertheDolbyLM100BroadcastLoudnessMeterortheDP600,thefollowinginformationwillassistyouinunderstandinghowtheDolbyMediaMeter2canbeused.

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

LM100

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

Dolby Media Meter 2

DolbyMediaMeter2providesseveralmeasurementmethodscomparabletothatoftheLM100:

Whenmeasuringpremixedcontent(suchassoundtracksbeingencodedforDVDorBlurayDisc)intheDolbyMediaMeter2RTASorAudioSuiteplugin,theplugincanbeinsertedontheCenterchannelintheeditsectionofProTools.

Whenmeasuringnewcontentbeingmixedforbroadcast,theRTASplugincanbeinsertedontheoutputbus.(Inthiscase,soloingtheCenterchannelwouldmostcloselymimictheLM100method.)

IntheDolbyMediaMeter2standaloneapplication,theCenterchannelsourcefilecanbeselectedindividually.ThiscouldbeanexportedconsolidatedCenterchannel.

Table A-1 Loudness Product Comparisons

Dolby Media

Meter

(Stand Alone)

Dolby Media

Meter

(AudioSuite)

Dolby Media

Meter

(RTAS/VST) LM100 DP600

Application Non

real

time Non

real

time Real

time Real

time Non

real

timeSupportedAlgorithms

ITURBS.17701ITURBS.17702Leq(A)




ITURBS.17701Leq(A)

MeasurementMethod

DialogueIntelligenceorEBUR128





PCM Monoto7.1 Monoto7.1 Monoto7.1 L,R,stereo Monoto5.1

DolbyDigital Monoto5.1 N/A N/A L,R,C,stereo,all Monoto5.1DolbyDigitalPlus Monoto7.1 N/A N/A N/A Monoto7.1DolbyTrueHD Monoto7.1 N/A N/A N/A N/ADolbyE Monoto7.1 N/A N/A L,R,C,stereo,all Monoto7.1


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A.2 Measuring a Stereo Program

LM100

TheLM100canbesettomeasureastereoprogramfromeitheranAESpair,DolbyE,orDolby

Digital

two

channel

program.

Dolby Media Meter 2

DolbyMediaMeter2providesseveralmeasurementmethodscomparabletothatoftheLM100:

IntheDolbyMediaMeter2RTASplugin,theplugincanbeinsertedonthestereooutputbusofProTools.

IntheAudioSuiteplugin,theplugincanbeinsertedonthetwochannelinputfileintheProToolseditsectionforcontentthatisalreadymixedandbeingconformedforencoding(forexample,forDVDorBlurayDisc).

IntheDolbyMediaMeter2standaloneapplication,thetwochannelLeftandRightfiles,orthetwochannelencodedfile,canbeselected.

A.3 Measuring with Dialogue Intelligence On and Speech Absent

MeasuringaprogramwithDialogueIntelligenceenabledandnodetectedspeechresultsindifferentindicationsdependingonwhichDolbyproductyouuse.

TheLM100andtheDolbyMediaMeter2RTASplugin,whichoperateasrealtimemeters,willdisplaytheflashingeariconuntildialogueisdetected.Ifnodialogueisdetected,thedisplaywillcontinuetoflashthroughouttheprogrammeasurement.

TheDolby

Media

Meter

2AudioSuite

and

stand

alone

versions,

which

operate

as

nonrealtimemeters,willdisplayNo Speech Detectedaftercompletionoftheprogrammeasurement.

TheDP600measurementcanbesettoreverttoanoverallloudnessmeasurement,asifDialogueIntelligencewasdisabled.

A.4 Measur ing a 5.1 Program

DolbyMediaMeter2usesthelatestadvancementsinmeasurementtechniques,asdoestheDP600.DolbyMediaMeter2providesseveralmeasurementmethodscomparabletothatoftheDP600:

IntheDolbyMediaMeter2RTASplugin,theplugincanbeinsertedonamultichanneloutputbusofProTools.

Note: RememberthatProToolsalwaysinsertsbothRTASandAudioSuitepluginsasprefader.InsertingthemeterontheinputsectionofProToolswhenmixautomationispresentwillnotgiveameasurementthatwillmatchthefinalmixedoutput.


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Documents

Dolby Media Meter 2 User's Manual