Dolby Laboratories DP570 D.4 Dynamic Range Control Profiles

Dynamic Range Control Profiles
Dolby® DP570 Multichannel Audio Tool User’s Manual 89
Insomesituationsitmaybenecessarytofurtherconstrainsignalpeaksabovetheaverage
dialoguelevelsothatthereislessthan20dBheadroom.TheselectionofasuitableRFmode
profileachievesthis.
D.4 Dynamic Range Control Profiles
SixpresetDRCprofilesareavailabletocontentproducers:FilmLight,FilmStandard,
MusicLight,MusicStandard,Speech,andNone.Eachisappliedinthepatternshownin
Figure D‐2.
FigureD‐2
Figure D-2 DRC Profile
Ineachcase,thecenterofthenullbandisassignedtotheregionsurroundingoradjacent
totheDialogueLevelparametersetting,andtheDRCprofileisappliedinrelationtothat
level.Herearethedetailsoftherangeforeachprofile.
•FilmLight
MaxBoost:6dB(below–53dB)
BoostRange:–53to–41dB(2:1ratio)
NullBandWidth:20dB(–41to–21dB)
EarlyCutRange:–26to–11dB(2:1ratio)
CutRange:–11to+4dB(20:1ratio)
•FilmStandard
MaxBoost:6dB(below–43dB)
BoostRange:–43to–31dB(2:1ratio)
NullBandWidth:5dB(–31to–26dB)
EarlyCutRange:–26to–16dB(2:1ratio)
CutRange:–16to+4dB(20:1ratio)
•MusicLight
(Noearlycutrange)
MaxBoost:12dB(below–65dB)
BoostRange:–65to–41dB(2:1ratio)
NullBandWidth:20dB(–41to–21dB)
CutRange:–21to+9dB(2:1ratio)
•MusicStandard
MaxBoost:12dB(below–55dB)
BoostRange:–55to–31dB(2:1ratio)
NullBandWidth:5dB(–31to–26dB)
EarlyCutRange:–26to–16dB(2:1ratio)
CutRange:–16to+4dB(20:1ratio)
Input Level
Low High
Boost
Range
Null
Band
Centeredat
theDialogue
LevelSetting
Cut
Range
Cut
Range
Early
Dialogue Level
Setting
Low High
Unity Gain
Ouput Level