Inc. Stereo System User's Manual
A Guide to Dolby Metadata Metadata Overview
Dolby
®
DP570 Multichannel Audio Tool User’s Manual 85
Therearetwofunctionalclassificationsofmetadata:
Professional—TheseparametersarecarriedonlyintheDolbyEbitstream.Theyareused
toautomaticallyconfigureadownstreamDolbyDigitalencoder,allowingmaximum
controlbythecontentproduceroverhowtheencodedbitstreamistreatedateachstepon
thewaytotheconsumer’s
decoder.
Consumer—TheseparametersarecarriedinboththeDolbyEandtheDolbyDigital
bitstream.Theconsumer’sDolbyDigitaldecoderusestheseparameterstocreatethebest
possibleaudioprogrampossibleoneachconsumer’splaybacksystem.Consumer
parametersincludetheDRCvalues,whichareultimatelyenabledbytheenduser’s
selection,asdiscussedinDynamicRangeControlonpage 88.
Bothtypesofmetadatacanbeexamined,modified,orpassedthroughduringencoding.
Table D‐1liststheactivemetadataparametersandindicateswhethertheparameteris
ProfessionalorConsumer.
Table D-1 Profession and Consumer Metadata Types
Metadata Parameter Professional Consumer
ProgramConfiguration x
ProgramDescriptionText x
DialogueLevel x
ChannelMode x
LFEChannel x
BitstreamMode x
LineModeCompression x
RFModeCompression x
RFOvermodulationProtection x
CenterDownmixLevel x
SurroundDownmixLevel x
DolbySurroundMode x
AudioProductionInformation x
MixLevel x
RoomType x
CopyrightBit x
OriginalBitstream x
PreferredStereoDownmix
a
x
Lt/RtCenterDownmixLevel
a
x
Lt/RtSurroundDownmixLevel
a
x
Lo/RoCenterDownmixLevel
a
x
Lo/RoSurroundDownmixLevel
a
x
DolbySurroundEXMode
a
x
A/DConverterType
a
x
DCFilter x