audio test standard v2fly手机音频测试

VersionRecords

Sl.No.

Revision

Created/ModifiedBy

Date

AmendmentDetails

1

Ver.1.0

StevenZhu/IvanTong

2012-06-07

2

Ver.2.0

CharlesCai

2013-01-01

Added:Echotestitem

Modified:RFR

3

4

5

6

7

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Content

VersionRecords 2

Content 3

Purpose 4

Scope 4

References 4

Overallloss/loudnessratings 4

ConnectionswithhandsetUE 4

ConnectionswithheadsetUE 5

Idlechannelnoise(handsetandheadsetUE) 5

Sending 5

Receiving 5

Sensitivity/frequencycharacteristics 6

HandsetandheadsetUEsending 6

HandsetandheadsetUEreceiving 7

Sidetonecharacteristics(handsetandheadsetUE) 8

Sidetoneloss 8

Distortion 9

Sendingdistortion 9

Receiving 9

EchoLoss 10

Purpose

Thisstandardistheaudioqualityacceptancecriterion,toensureaudioperformancemeetthequalityrequirements,makesureproductquality,andprovidethejudgmentstandardfortheinspection

Scope

ThisstandardwillbeappliedtoaudioevaluationandsampleinspectionforallNF’sproducts

References

3GPPTS26.131V10.4.0(2011-11)

Overallloss/loudnessratings

ConnectionswithhandsetUE

ThenominalvaluesofSLR/RLRtothePOIshallbe:SLR=8±3dB;

RLR=2±3dB.

Whereauser-controlledreceivingvolumecontrolisprovided,theRLRshallmeetthenominalvalueforatleastonesettingofthecontrol.Whenthecontrolissetto um,theRLRshallnotbe≤(equalorlouderthan)-13dB.

WiththevolumecontrolsettotheminimumpositiontheRLRshallnotbe≥(equalorquieterthan)18dB.

ConnectionswithheadsetUE

ThenominalvaluesofSLR/RLRto/fromthePOIshallbe:SLR=8±3dB;

RLR=2±3dB;

RLR(binauralheadset)=8±3dBforeachearphone.

Whereauser-controlledreceivingvolumecontrolisprovided,theRLRshallmeetthenominalvalueforatleastonesettingofthecontrol.Whenthecontrolissettoum,theRLRshallnotbe≤(equalorlouderthan)-13dB.

WiththevolumecontrolsettotheminimumpositiontheRLRshallnotbe≥(equalorquieterthan)18dBandshallnotbe≥(equalorquieterthan)24dBforabinauralheadset.

Idlechannelnoise(handsetandheadsetUE)

Sending

The umnoiselevelproducedbytheapparatusattheoutputoftheSSundersilentconditionsinthesendingdirectionshallbe≤

-64dBm0p.

NOTE1: Thislevelludestheeventualnoisecontributionofanacousticechocancellerundertheconditionthatnosignalisreceived.

NOTE2: Thisfigureappliestothetotalnoiselevelwithpsophometricweighting.

Itis mendedthatthelevelofsinglefrequencydisturbancesshouldbe≤-74dBm0pinthefrequencyrangefrom300Hzto3.4kHz.

Receiving

The um(acoustic)A-weightednoiselevelatthehandsetandheadsetUEwhennosignalisappliedtotheinputoftheSSshallbeasfollows:

Ifnouser-controlledreceivingvolumecontrolisprovided,or,ifitisprovided,atthesettingoftheuser-controlledreceivingvolumecontrolatwhichtheRLRisequaltothenominalvalue,thenoisemeasuredattheDRPwithdiffuse-fieldcorrectioncontributedbythereceivingequipmentaloneshallbe≤-57dBPa(A).

Whereavolumecontrolisprovided,themeasurednoiseshallbe≤

-54dBPa(A)attheumsettingofthevolumecontrol.

Forthenominalvolumecontrolsetting,thelevelofsinglefrequencydisturbancesshouldbe≤-60dBPa(A)inthefrequencyrangefrom100Hzto10kHz.Asaperformanceobjectiveitis mendedthatthelevelshouldbe≤-64dBPa(A).

NOTE:InaconnectionwiththePSTN,noiseconditionsasdescribedinITU-TmendationG.103[3]canbeexpectedattheinput(POI)ofthe3Gnetwork.Thecharacteristicsofthisnoisemaybeinfluencedbythe

speechtranscodingprocess(forfurtherstudy).

Sensitivity/frequencycharacteristics

HandsetandheadsetUEsending

Thesensitivity/frequencycharacteristicsshallbeasfollows:

Thesendingsensitivityfrequencyresponse,measuredeitherfromthemouthreferencepoint(MRP)tothedigitalinterfaceorfromtheMRPtotheSSaudiooutput(digitaloutputofthereferencespeechdecoderoftheSS),shallbewithinamask,whichcanbedrawnbetweenthepointsgivenintable1.Themaskisdrawnwithstraightlinesbetweenthebreakingpointsintable1onalogarithmic(frequency)-linear(dBsensitivity)scale.

Table1:Handsetandheadsedingsensitivity/frequencymask

Frequency(Hz)

Upperlimit

Lowerlimit

100

-12

200

0

300

0

-12

1000

0

-6

2000

4

-6

3000

4

-6

3400

4

-9

4000

0

NOTE: AllsensitivityvaluesareexpressedindBonanarbitraryscale.

10

5

0

-5

-10

100 Frequency[Hz] 1000 4000

HandsetandheadsetUEreceiving

Thesensitivity/frequencycharacteristicsshallbeasfollows:

Thereceivingsensitivityfrequencyresponse,measuredeitherfromthedigitalinterfacetotheDRPwithdiffuse-fieldcorrectionorfromtheSSaudioinput(ogueordigitalinputofthereferencespeechencoderoftheSS)totheDRPwithdiffuse-fieldcorrectionshallbewithinamask,whichcanbedrawnwithstraightlinesbetweenthebreakingpointsintable2onalogarithmic(frequency)-linear(dBsensitivity)scale.

Frequency(Hz)

Upperlimit

Lowerlimit

70

-10

—

200

0

—

300

2

-7

500

(seenote2)

-5

1000

0

-5

3000

2

-5

3400

2

-10

4000

2

—

NOTE1:AllsensitivityvaluesareexpressedindBonanarbitraryscale.

NOTE2:Thelimitatintermediatefrequenciesliesonastraightlinedrawnbetweenthegivenvaluesonalog(frequency)-linear(dB)scale.

Sidetonecharacteristics(handsetandheadsetUE)

Sidetoneloss

Thetalkersidetonemaskingrating(STMR)shallbe18±5dBforthenominalsettingofthevolumecontrol.Forallotherpositionsofthevolumecontrol,theSTMRshallbe≥10dB.

ThehandsetshallbepositionedintheLRGP.TheType3.2LowLeakartificialearshallbeused.

Distortion

Sendingdistortion

Thesendingpartshallmeetthefollowingdistortionrequirements:

NOTE1:Digitalsignalprocessingotherthanthetranscoderitselfisludedinthisrequirement(e.g.echocancelling).

DistortionshallbemeasuredbetweentheMRPandtheSSaudiooutput(outputofthereferencespeechdecoderoftheSS).Theratioofsignal-to-totaldistortionpowermeasuredwiththepropernoiseweighting(seetable4ofITU-T

mendationG.223)shallbeabovethelimitsgivenintable7.

Table7:Limitsforsignal-to-totaldistortionratio

Sendinglevel

(dBPaattheMRP)

SendingRatio(dB)

5

30

0

35

-4,7

35

-10

33

-15

30

-20

27

Receiving

ThereceivingpartbetweentheSSaudioinput(inputofthereferencespeechencoderoftheSS)andtheDRPwithdiffuse-fieldcorrectionshall

meettherequirementsinthissub-clauseatthenominalsettingofthevolumecontrol:

Theratioofsignal-to-totaldistortionpowermeasuredwiththepropernoiseweighting(seetable4ofITU-T mendationG.223)shallbeabovethelimitsgivenintable8whenthesoundpressureattheDRPwithdiffuse-fieldcorrectionisupto10dBPa.Forasoundpressure≥10dBPaattheDRPwithdiffuse-fieldcorrectionthereisnodistortionrequirement.

Table8:Limitsforsignal-to-totaldistortionratio

Receivinglevelatthedigitalinterface(dBm0)

ReceivingRatio(dB)

0

25,5

-3

31,2

-10

33,5

-20

33,0

-30

30,5

-40(*)

22,5(*)

-45(*)

17,5(*)

NOTE:(*)Forlevels-40and-45dBm0,thestatedlimitsare

mendations;hencealowersignal-to-distortionratioshallnotberegardedasafailingresult.However,theobtainedresultsshallbe

reported.

EchoLoss

Theecholoss(EL)presentedbythe3workatthePOIshouldbeatleast40dBduringsingletalk.ThisvaluetakesintoaccountthefactthatUEislikelytobeusedinawiderangeofnoiseenvironments.

Theuseofacousticechocontrolisnotmandatedfor3GworksandtheconnectionbetweentheUEandthePOIiszeroloss.ThereforetheacousticechocontrolprovidedinUEshouldprovideaTCLwofatleast40dBatthePOIoverthelikelyrangeofacousticenddelays.

Thehandsetissuspendedin