Dolby Laboratories Program Optimizer DP600 Manuel d'utilisateur télécharger pdf (Page 21)

Measurement Algorithm

Dolby

Media Meter 2 User’s Manual 17

4.1 Measurement Algorithm

ChooseLeq(A),ITU‐RBS.1770‐1,orITU‐RBS.1770‐2byclickingaradiobuttonatthetop

ofthesettingswindow.

4.2 Short-Term Window

Choosealengthforstandardsthatallowthisoption(threesecondsortenseconds).

4.3 Peak Measurement Type

Youcanchoosebetweenthedefaultpeakmeasurementtype,Sample Peak,andTrue Peak,

whichincludespeaksthatoccurinbetweensamples.

4.4 Level Meters

Allofthereal‐timeplug‐insallowyoutoshowlevelmeterssimilartothoseintheDolby

MediaDecoderforeachchannelbeingmeasured.

4.5 Limiter

Allofthereal‐timeplug‐insallowyoutoapplyapeaklimiter.UnlikemostDolbyMedia

Meter2features,thislimiteractsonyourtracks.Youcansetthisvaluefrom0to–51toaid

inpreventingyourtracksfromexceedingtheselectedpeakvalue,helpingyoutomeet

liveryspecifications.

4.6 Measurements Displayed

Inthestand‐aloneapplication,youcandisplayanyfourmeasurementsinanyorder.Inthe

plug‐ins,youcandisplayuptoseveninanyorder.

4.7 Graphing

DolbyMediaMeter2providesaflexiblegraphingfeaturetoaidinvisualizationofthe

measurementsitmakes.

Right‐clickinginthegraphwindowopensacontextualmenuwithcommandsto:

•Selectthemeasurementstobegraphed.

•Clearthegraphdisplay.

•Latchorunlatchthegraphdisplay.

Note: Determiningtruepeaksiscalculationintensive.YoumaynoticeincreasedCPU

resourceuseinreal‐timeapplicationswhenyouchooseTrue Peak.

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Dolby Laboratories Program Optimizer DP600 Manuel d'utilisateur Page 21