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26 Dolby
®
DP570 Multichannel Audio Tool User’s Manual
Using the DP570 Features Generating and Adjusting Metadata
4.3.1 Choosing the Source of Metadata
Normallyyouwilluseanentiremetadatastreamfromonesource,butthatisnotrequired.
Youcontrolthissourcechoiceatthreelevels:
1. Youchooseaprogramconfiguration.Thisdefaultsallparametersforallprogramsin
thestreamtothesourceyouchose:internal,external1,orexternal2.
Anexample
ofthisconfigurationisaQCenvironment,wheretheoperatorusesthe
entiremetadatastreamtomonitorthe overallaudioquality.
2. Youchooseasourceforaparticularprogram.Thisautomatically setsthedefault
sourceforallparametersintheprogrambutdoesnotaffectanyoftheotherprograms
in
thestream.
3. Youcanchooseanexternalsourceforanindividualparameterwhichaffectsonlythat
selectedparameter.
Typicallyyouwoulddothistocorrectaknownerror.
DolbyRemote570makesselectingthemetadatasourcesimple.Choosinganexternal
programconfigurationorprogramchangesparametersettingsautomatically.Individual
parameterscanstillbe
changedwithoutaffectingotherparameters.
Metadatasourcechoicesstaysetuntil:
•Youmanually changeasourcechoice.
•Youreceiveadifferentprogramconfiguration.
4.3.2 Using Generated Metadata
Whenthesourceisinternal, thedefaultvaluesthe DP57 0appliesaredeterminedbythe
numberofchannelsintheinputasshowninTable 4‐1.
Table 4-1 Metadata Parameter Defaults
Metadata Parameter
5.1
channels
Four
channels
Two
channels
One
channel
DialogueLevel –27 –27 –27 –27
ChannelMode 3/2 3/1 2/0 1/0
LFEChannel On Off Off Off
DCHighpassFilter On On On On
LowpassFilter On On On On
LFEFilter On Off Off Off
SurroundPhaseShift On On Off Off
Surround3dB
Attenuation
On On Off Off
LineModeCompression FilmLight FilmLight FilmStandard FilmStandard
RFModeCompression FilmStandard FilmStandard FilmStandard Speech
RFOvermodulation
Protection
Off Off Off On
BitstreamMode Completemain Completemain Completemain Completemain