Inc. Program Optimizer Manual

Profile Descriptions
Dolby
®
DP600 Program Optimizer Manual 89
Profile: GXF_AC3-1 Æ GXF File with Dolby E Transcoded to Dolby Digital .ac3
Files
ProfileGXF_AC3‐1transcodesallDolbyEtrackswithinaGXFfileto.ac3files(oneforeach
programcontainedinDolbyE).Encodedoutputdataratesareautomaticallyprovisioned
ateither384kbps(forsix‐channelaudio)or192kbps(fortwo‐channelaudio).Thedialogue
normalizationvalueisalsoautomaticallyp rovisionedtothecorrectvalueforallAC‐3
programscontainedin
theDolbyEstream.Notethatanytwo‐channelPCMprogramming
(nonDolbyEdata)foundwithintheDolbyEtracksisalsoencodedtoaseparatesetof
.ac3
files(withtheappropriatesequencenumberingfoundinthefilenames)andautomatically
normalizedto–27LKFS.AllremainingAC‐3metadataparametersareprovisionedfrom
theAC‐3metadatawithineachprogramcontainedintheDolbyEdatafile/stream.
GXF File with
Dolby E
Process Æ Dolby E decode Æ Speech-based
Loudness Estimation for all Dolby E programs
ÆDolby Digital encode for each E program with
dialnorm set correctly
Measurement Type Æ Speech-based ITU -R
BS.1770
.ac3 File
Dolby Digital (AC-3)
Program 1
dialnorm set correctly
. . .
.ac3 File
Dolby Digital (AC-3)
Program n
dialnorm set correctly