Dolby Laboratories DP570 Program Description Text, Dialogue Level , Channel Mode

Parameter Definitions

Dolby® DP570 Multichannel Audio Tool User’s Manual 93

eachprogramcontainsitsownmetadata.Thedefaultsettingis5.1+2.Table D ‐3showsall

theavailableconfigurations.

Program Description Text

Thisisa32‐characterASCIItextfieldthatallowsthemetadataauthortoenteradescription

oftheaudioprogram.Forexample,thisfieldmaycontainthenameoftheprogram(Movie

ChannelPromo),adescriptionoftheprogramsource(FootballMainFeed),ortheprogram

language(Danish).

Dialogue Level

TheDialogueLevelparameterisdiscussedinDialogueLevelonpage 86.

Channel Mode

Thisparameter(alsoknownasaudiocodingmode)indicatestheactivechannelswithinthe

encodedbitstreamandaffectsboththeencoderandconsumerdecoder.Thisparameter

instructstheencoderwhichinputstouseforthisparticularprogram;ittellsthedecoder

whatchannelsarepresentinthisprogramsothedecodercandelivertheaudiotothe

correctspeakers.

ThesettingisdescribedasX/Y,whereXisthenumberoffrontchannels(Left,Center,

Right)andYthenumberofrearorsurroundchannels.

TheavailabilityofcertainchannelmodesdependsontheDolbyDigitalencoderdatarate

andwhethertheLFEchannelispresent.Forexample,youcan’thaveamonostreamwith

anLFEchannel(1.1)ora3/2streamat96kbps.Appropriatedataratesareshowninthe

definitionofeachsetting.

Table D-3 Program Configuration Settings

5.1+2 4+2

5.1+2×14+2×1

4+43×2

4+2×22×2+2×1

4+2+2×12+4×1

4+4×16×1

4×24

3×2+2×12+2

2×2+4×12+2×1

5.1+2 4+2

5.1+2×14+2×1

4+43×2

Note: ThepresenceoftheLFEchannelisindicatedbytheLFEChannelparameter.