Inc. Program Optimizer Manual

84 Dolby
®
DP600 Program Optimizer Manual
DP600 Program Optimizer Detailed Profile Descriptions
Profile: TS_TS-5 Æ MPEG-2 Transport Stream with Dolby Digital (AC-3)
Transcode to Dolby Digital Plus (E-AC-3)
ProfileTS_TS‐5transcodesallDolbyDigital(AC‐3)elementarystreamscontainedwithin
asingleprogramtransportstream(SPTS)toDolbyDigitalPlus(E‐AC‐3).TheE‐AC‐3
elementarystreamsreplacetheoriginalAC‐3elementarystreams,butretaintheoriginal
PIDvalues.Thedialoguenormalizationvalueinthe
E‐AC‐3elementarystreamsis
correctlyprovisionedbasedontheITU‐RBS.1770speechlevel.Allaudiometadatais
preservedinthisprofile,exceptfortheoutputdatarate,whichisprovisionedasfollows:
For1/0(mono)sources,theoutputdatarateis96kbps.For2/0(stereo)sources,
theoutput
datarateis128kbps.For3/2or3/2Lsources,theoutputdata rateis224kbps.
Profile: PS_PCM-1 Æ MPEG-2 Program Stream Dolby E Decode to Multiprogram
.wav Extensible File with Dolby Metadata Chunk (Dialnorm Set Correctly)
ProfilePS_PCM‐1decodesallDolbyEstreamswithinanMPEG‐2programstreamtoa
singlemultiprogramPCM
.wavextensiblefilewithaDolbymetadatachunk.Notethatthe
dialoguenormalizationvalueforeachprogramintheaudiometadatachunkisset
correctly.AlsonotethatthisprofileassumestheMPEG‐2programstreamfilewas
generatedbyanAvid/Pinna cleSystems
®
MediaStream
™
system.
Profile: PS_PS-1 Æ MPEG-2 Program Stream with Dolby Digital (AC-3) dialnorm
Correction
ProfilePS_PS‐1correctsthemetadatavalues(dialnorm,dynrng,andcompr)withinall
DolbyDigital(AC‐3)elementarystreams ifthemeasureddialogueloudnessisgreaterthan
theoriginaldialoguenormalizationvalueby±1dB.
Process ÆSpeech-based Loudness
Estimation / dialnorm provisioning &
Transcode to Dolby Digital (AC-3) with
Correct Dialnorm value
Measurement Type Æ Speech-based ITU-R
BS.1770
MPEG-2 Transport Stream with
Dolby Digital Plus (E AC-3)
MPEG-2 Transport
Stream with Dolby
Digital (AC-3)
Process Æ Dolby E decode Æ Speech-based
Loudness Estimation for all Dolby E programs
Measurement Type Æ Speech-based ITU-R
BS.1770
MPEG-2 Program
Stream with Dolby E
Multiprogram WAVE
Extensible File (PCM)
w/ Metadata Chunk
dialnorm set correctly
MPEG-2 Program Stream
with Dolby Digital (AC-3)
MPEG-2 Program Stream
with Dolby Digital (AC-3)
dialnorm correct
Process ÆSpeech-based Loudness
Estimation and dialnorm correction
Measurement Type Æ Speech-based
ITU-R BS.1770