ITU P.341:2005
ITU P.341:2005 Transmission Characteristics For Wideband (150 7000 Hz) Digital Hands Free Telephony Terminals Provides audio performance requirements for wideband audio (7 kHz) hands-free telephones.
Table of Contents
1Scope2Normativereferences
3Definitionsandabbreviations
4Sendingcharacteristics
4.1Loudnessrating
4.2Sensitivity/frequencycharacteristics
4.3Noise
4.4Distortion
4.5Discriminationagainstout-of-bandinputsignals
5Receivingcharacteristics
5.1Loudnessrating
5.2Sensitivity/frequencycharacteristics
5.3Noise
5.4Distortion
5.5Spuriousout-of-bandreceivingsignals
6Echopathlosscharacteristics
6.1WeightedTerminalCouplingLoss(TCLw)
6.2Stabilityloss
7Delay
AnnexA-Objectivemeasurementmethodsforwideband
hands-freetelephonesusingthereference
codecapproach
A.1Introduction
A.2Electricalinterfacespecifications
A.3Electro-acousticmeasurementconsiderations
A.4Sendingmeasurements
A.5Receivingmeasurements
A.6Echopathlossmeasurements
A.7Delaymeasurements