Telos Systems Zephyr Xstream Manual

A SERVICE OF

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USER’S MANUAL

Section 11: THE WORKS – Detailed Menu Reference 203

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CODEC – Screen 2

Transmit:

TheTransmitsettingdetermineswhatstandard(i.e.algorithm)isusedtoencodetheaudioto

besenttothefarend.Eachmodeoffersdistinctadvantagesanddisadvantages(seesection6.2

foradditionalinformation),asfollows:

L3StereoandL3J‐Stereo

UntilthereleaseoftheZephyrXstream,MPEGLayer‐3wasthebe

stavailable

algorithmforsendingstereoaudioover2ISDNBchannels.Joint(i.e.Joint

Stereo)shouldbeusedforthemajorityofapplications,asiteliminatesthe

redundanttransmissionofthecenterchannelinformationtypicalinmost

sourcematerial.

L3Stereoisappropriateforsituationswherethea

udiotransmittedwillbe

subjecttoplaybackoverSurroundSoundsystems(i.e.mostlyforTelevision).

UsetheseLayer‐3stereomodesifthefarenddoesnotsupportAAC.

Thismodeoffers15kHzaudiofrequencyresponseiftheSampleRateissetto

32or16kHzaudiofrequencyresponseiftheSampleRat

eissetto48kHz.