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Measuring with the Stand-Alone Product

Dolby

Media Meter 2 User’s Manual 7

providedbyInfinitemodemeasurementforthesamecontent.(Highlyprocessedchannels

andprogrammingwillmostlikelynotexhibitthistypeofbehavior.)

ThebenefitofmeasuringinShort‐Termmodeisthattheoperatorcanseeshort‐term

variationsinloudnesslevel(orshort‐termvariationsindialoguelevelwhenDialog

ue

Intelligenceisenabled)withinaprogram.Manyskilledaudiooperatorsprefertousethe

Short‐Termmodemeasurement,astheyfindtheinformationonnear‐termdynamicstobe

veryusefulwhenmixingorproducingaprogram,andtheyarecapableofmanaging

overallprogramloudnessbyreadingtheshort‐termmeasur

Short‐Termmodeisalsoveryusefulformeasuringandloggingthedynamicloudness

historyofagivenprogramduringtheQCorpostproductionprocess,orinaparticular

televisionserviceorchannelinacableheadendfacility.

Choosing a Short-Term Window Length

Somestandardsallowachoiceofshort‐termwindowlength,eitherthreeortenseconds.

DolbyMediaMeterincludesasettingforthischoice,asshowninFigure 3‐3.

Figure3‐3 

Figure 3-3 Short-Term Window Length Setting

3.3 Measuring with the Stand-Alone Product

Thestand‐aloneDolbyMediaMeter2applicationmeasuressourceandencodedfiles.The

softwareanalyzestheinput,thendisplaysthemeasuredresultsforuseindeterminingthe

proper

dialnormmetadatavaluetouseduringencoding.ThisisusefulforDVDand

Blu‐rayDisc

™

postproduction,broadcastfacilities,videoondemand(VOD),movie

downloadservices,andvideogames.

Beforeyoubegin tomeasure,checkthedefaultvaluesontheDolbyMediaMetersettings

screendiscussedinChapter 4.

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Dolby Laboratories Program Optimizer DP600 Manuel d'utilisateur Page 11