Dolby Laboratories DP570 4.3.1 Choosing the Source of Metadata, 4.3.2 Using Generated Metadata

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
Normallyyouwilluseanentiremetadatastreamfromonesource,butthatisnotrequired.
Youcontrolthissourcechoiceatthreelevels:
1. Youchooseaprogramconfiguration.Thisdefaultsallparametersforallprogramsin
thestreamtothesourceyouchose:internal,external1,orexternal2.
AnexampleofthisconfigurationisaQCenvironment,wheretheoperatorusesthe
entiremetadatastreamtomonitortheoverallaudioquality.
2. Youchooseasourceforaparticularprogram.Thisautomaticallysetsthedefault
sourceforallparametersintheprogrambutdoesnotaffectanyoftheotherprograms
inthestream.
3. Youcanchooseanexternalsourceforanindividualparameterwhichaffectsonlythat
selectedparameter.
Typic ally youwoulddothistocorrectaknownerror.
DolbyRemote570makesselectingthemetadatasourcesimple.Choosinganexternal
programconfigurationorprogramchangesparametersettingsautomatically.Individual
parameterscanstillbechangedwithoutaffectingotherparameters.
Metadatasourcechoicesstaysetuntil:
•Youmanuallychangeasource���choice.
•Youreceiveadifferentprogramconfiguration.
4.3.2 Using Generated Metadata
Whenthesourceisinternal, thedefaultvaluestheDP570appliesaredeterminedbythe
numberofchannelsintheinputasshowninTable 4 ‐1.
Table 4-1 Metadata Parameter Defaults
Metadata Parameter 5.1
channels Four channels Two channels One channel
DialogueLevel –27 –27 –27 –27
ChannelMode 3/2 3/1 2/0 1/0
LFEChannel On Off Off Off
DCHighpassFilter On On On On
LowpassFilter On On On On
LFEFilter On Off Off Off
SurroundPhaseShift On On Off Off
Surround3dB
Attenuation
On On Off Off
LineModeCompression FilmLight FilmLight FilmStandard FilmStandard
RFModeCompression FilmStandard FilmStandard FilmStandard Speech
RFOvermodulation
Protection
Off Off Off On
BitstreamModeCompletemain Completemain Completemain Completemain