Dolby Laboratories DP600 Introduction

Dolby® DP600 Program Optimizer Manual 1
Chapter 1
Introduction
Welcom etoDolby®file‐basedaudio!
TheDolbyDP600ProgramOptimizerisadirectresultofDolbyLaboratories’continued
leadershipinthedevelopmentofinnovativebroadcasttechnologies.Thisinnovativetool
isdesignedspecificallyforcable,satellite,IPTV,andterrestrialTVbroadcastersthat
employafile‐basedinfrastructureandworkflow.TheDP600includestheworld’sfirst
intelligentaudioanalysisandautomatedloudnessnormalizationengineformanyofthe
mostcommonbroadcastmediafileandaudioformatsinusetoday.Inaddition,itoffers
DolbyE,DolbyDigital,andDolbyDigitalPlusencoding,decoding,andtranscoding,allin
anopenarchitecture.
UsingtheDP600,broadcasterscanprovidetheirviewerswithaconsistentaudio
experienceandreduceloudnesscomplaintsacrossalloftheirprograms,channels,and
networks.ExpandingupontheuniqueDialogueIntelligence™technologydevelopedfor
theDolbyLM100BroadcastLoudnessMeter,theDP600normalizestheloudnessofaudio
programswithnoimpactontheiroriginaldynamicrange.
TheDP600automatespreviouslylengthyquality‐controlprocesses,andperformsthemin
fasterthanrealtime.ItautomaticallyanalyzesaudiobitstreamscodedinDolbyE,Dolby
Digital,andDolbyDigitalPlus,foranychannelconfigurationandloudnesslevel.It
intelligentlyandautomaticallysets,validates,andcorrectsthedialoguenormalization
(dialnorm)audiometadataparameterwithouttheneedfordecodingandreencoding—
ensuringaproperlyencodedbitstream.TheDP600alsoprovidesintelligentandautomatic
speech‐basedloudnessnormalizationforbothPCMaudioandMPEG‐1LIIaudio.
Forcompressedaudioformatsthatincludemetadata(forexample,DolbyE,DolbyDigital,
andDolbyDigitalPlus),theDolbyDP600canautomaticallysetorcorrectthedialnorm
parameter(seeFigure1‐1).Foraudioformatsthatdonotincludemetadata,theDolby 
DP600canautomaticallysetorcorrectthedialnormparameterbyreferencinga
user‐definedtargetlevel(seeFigure1‐2).
TheModelDP600‐Caddsfaster‐than‐real‐timefile‐basedencodinganddecodingofDolby
DigitalandDolbyDigitalPlus,andthefirstfile‐basedimplementationofDolbyE.In
addition,thismodelenablesmultichannelaudiotranscodingofDolbyEtoDolbyDigital
orDolbyDigitalPlusformats.Italsoprovidesauniquehigh‐quality,single‐stepDolby
DigitaltoDolbyDigitalPlustranscoderthatpreservesthemetadataandminimizes
tandemcodinglosses.Thisallowstheaudiofromexistingmediaarchivestobeconverted
tonext‐generationbroadcastformats.