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Measuring with the Stand-Alone Product
Dolby
®
Media Meter 2 User’s Manual 7
providedbyInfinitemodemeasurementforthesamecontent.(Highlyprocessedchannels
andprogrammingwillmostlikelynotexhibitthistypeofbehavior.)
ThebenefitofmeasuringinShortTermmodeisthattheoperatorcanseeshortterm
variationsinloudnesslevel(orshorttermvariationsindialoguelevelwhenDialog
ue
Intelligenceisenabled)withinaprogram.Manyskilledaudiooperatorsprefertousethe
ShortTermmodemeasurement,astheyfindtheinformationonneartermdynamicstobe
veryusefulwhenmixingorproducingaprogram,andtheyarecapableofmanaging
overallprogramloudnessbyreadingtheshorttermmeasur
e.
ShortTermmodeisalsoveryusefulformeasuringandloggingthedynamicloudness
historyofagivenprogramduringtheQCorpostproductionprocess,orinaparticular
televisionserviceorchannelinacableheadendfacility.
Choosing a Short-Term Window Length
Somestandardsallowachoiceofshorttermwindowlength,eitherthreeortenseconds.
DolbyMediaMeterincludesasettingforthischoice,asshowninFigure 33.
Figure33
Figure 3-3 Short-Term Window Length Setting
3.3 Measuring with the Stand-Alone Product
ThestandaloneDolbyMediaMeter2applicationmeasuressourceandencodedfiles.The
softwareanalyzestheinput,thendisplaysthemeasuredresultsforuseindeterminingthe
proper
dialnormmetadatavaluetouseduringencoding.ThisisusefulforDVDand
BlurayDisc
postproduction,broadcastfacilities,videoondemand(VOD),movie
downloadservices,andvideogames.
Beforeyoubegin tomeasure,checkthedefaultvaluesontheDolbyMediaMetersettings
screendiscussedinChapter 4.
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