1、 ETSI EN 300 176-2 V2.2.1 (2012-07) Digital Enhanced Cordless Telecommunications (DECT); Test specification; Part 2: Audio and speech European Standard ETSI ETSI EN 300 176-2 V2.2.1 (2012-07) 2Reference REN/DECT-000265 Keywords 7 kHz, audio, codec, DECT, handsfree, IMT-2000, loudspeaking, mobility,
2、narrowband, quality, radio, regulation, speech, TDD, TDMA, telephony, terminal, testing, voice ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfe
3、cture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such ve
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6、ort.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2012. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI log
7、o are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI EN 300 176-2 V2.2
8、.1 (2012-07) 3Contents Intellectual Property Rights 12g3Foreword . 12g31 Scope 13g32 References 14g32.1 Normative references . 14g32.2 Informative references 16g33 Definitions, symbols and abbreviations . 18g33.1 Definitions 18g33.2 Symbols and abbreviations . 20g34 Interpretation of the measurement
9、 results 23g35 General test requirements . 23g35.1 Test philosophy 23g35.1.1 Testable items . 23g35.1.2 Testing of the codecs 23g35.1.3 Testing of the audio types . 23g35.1.4 Devices with analog line interfaces 24g35.1.5 Equipment supporting an ETSI approved profile . 24g35.1.6 Equipment not support
10、ing an ETSI approved profile . 25g35.1.7 Applicants declaration 26g36 General testing conditions 26g36.1 Low noise room 26g36.2 Lower Tester (LT) 26g36.2.1 Description 26g36.2.2 Connections between the EUT and the LT . 26g36.2.3 Functions and abilities 26g36.2.4 Measurement uncertainty 27g36.3 Power
11、 and environment 27g36.3.1 Environment for tests 27g36.3.2 Power supply limitations 27g36.3.3 Power source . 27g36.4 Test configurations . 27g36.4.1 General 27g36.4.2 Testing a DECT system 28g36.4.3 Testing a separate PP or FP 28g36.4.4 Reference FP (ReFP) and Reference PP (RePP). 29g36.5 Digital si
12、gnal levels 30g36.5.1 Digital signal levels for codecs G.711 and G.726 . 30g36.6 General test conditions . 30g36.7 Ideal codecs (for codecs G.726, G.711, G.722, G.729.1 and MPEG-AAC) 31g36.7.1 Ideal codec for codecs G.726 and G.711 31g36.7.2 Ideal codec for codecs G.722, G.729.1 and MPEG-4 (wideband
13、 mode) 32g36.7.3 Ideal codec for MPEG-4 (super-wideband mode) 33g36.8 Electro-acoustical equipment . 33g36.8.1 Artificial mouth and artificial ear . 33g36.8.2 Head and Torso Simulator (HATS) 33g36.9 Speech coding scheme 33g36.9.1 Requirement for speech coding algorithm 33g36.9.2 Applicants declarati
14、on on speech coding algorithm . 33g36.9.3 Requirement for the TAP in the FP 34g36.9.4 Applicants declaration on the TAP in the FP . 34g36.10 Test setup 34g36.10.1 Set up for handset type 1a or 1b 34g36.10.2 Set up for handset type 2a . 34g3ETSI ETSI EN 300 176-2 V2.2.1 (2012-07) 46.10.3 Set up for h
15、andset or headset other than type 1a, 1b or 2a 34g36.10.3.1 Positioning handset or headset 34g36.10.3.2 Position and calibration of HATS . 35g36.10.4 Set up for hands-free measurements . 35g36.10.4.1 Positioning handsfree 35g36.10.4.2 Position and calibration of HATS . 40g36.10.4.2.1 Sending 40g36.1
16、0.4.2.2 Receiving . 40g36.10.5 Set up for measurements in loudspeaking mode . 41g36.10.6 Setup for background noise simulation . 41g37 Test of audio specifications 42g37.1 Overall description . 42g37.1.1 Introduction to DECT audio specifications 42g37.1.2 Introduction to the audio types . 42g37.1.3
17、List of Audio types . 43g37.1.4 Audio types for Portable Parts 43g37.1.5 Audio types for Fixed Parts 44g37.1.6 Complete DECT system . 44g37.1.7 Structure of the specification of the audio types . 45g37.1.8 Audio Types and codecs . 51g37.1.9 Audio Types and physical interfaces 51g37.2 Audio types app
18、licable to Portable Parts 51g37.2.1 Performance levels of DECT Portable Parts (handsets) 51g37.2.2 Type 0: Reference PP (RePP) . 52g37.2.3 PP Type 1a: “Classic“ GAP narrowband handset . 52g37.2.3.1 Introduction . 52g37.2.3.2 Compatible services and codecs 53g37.2.3.3 Specification 53g37.2.4 PP Type
19、1b: “Improved“ GAP narrowband handset . 53g37.2.4.1 Introduction . 53g37.2.4.2 Compatible services and codecs 53g37.2.4.3 Specification 53g37.2.5 PP Type 1c: HATS-tested “standard“ narrowband handset 53g37.2.5.1 Introduction . 53g37.2.5.2 Compatible services and codecs 54g37.2.5.3 Specification 54g3
20、7.2.6 PP Type 1d: HATS-tested “improved“ narrowband handset 54g37.2.6.1 Introduction . 54g37.2.6.2 Compatible services and codecs 54g37.2.6.3 Specification 54g37.2.7 PP Type 3a: HATS tested narrowband “standard“ loudspeaking handsfree . 54g37.2.7.1 Introduction . 54g37.2.7.2 Compatible services and
21、codecs 55g37.2.7.3 Specification 55g37.2.8 PP Type 3b: HATS tested narrowband “improved“ loudspeaking handsfree . 55g37.2.8.1 Introduction . 55g37.2.8.2 Compatible services and codecs 55g37.2.8.3 Specification 55g37.2.9 PP Type 2a: P.311-tested wideband handset. 55g37.2.9.1 Introduction . 55g37.2.9.
22、2 Compatible services and codecs 55g37.2.9.3 Specification 55g37.2.10 PP Type 2b: HATS-tested “standard“ wideband handset or headset 56g37.2.10.1 Introduction . 56g37.2.10.2 Compatible services and codecs 56g37.2.10.3 Specification 56g37.2.11 PP Type 2c: HATS tested “improved“ wideband handset or he
23、adset . 56g37.2.11.1 Introduction . 56g37.2.11.2 Compatible services and codecs 56g37.2.11.3 Specification 56g37.2.12 PP Type 4a: HATS tested wideband “standard“ loudspeaking handsfree 57g3ETSI ETSI EN 300 176-2 V2.2.1 (2012-07) 57.2.12.1 Introduction . 57g37.2.12.2 Compatible services and codecs 57
24、g37.2.12.3 Specification 57g37.2.13 PP Type 4b: HATS tested wideband “improved“ loudspeaking and handsfree 57g37.2.13.1 Introduction . 57g37.2.13.2 Compatible services and codecs 57g37.2.13.3 Specification 58g37.2.14 PP Type 5a: super wideband 14 kHz handset . 58g37.2.14.1 Introduction . 58g37.2.14.
25、2 Compatible services and codecs 58g37.2.14.3 Specification 58g37.2.15 PP Type 5b: super wideband 14 kHz loudspeaking handsfree . 58g37.2.15.1 Introduction . 58g37.2.15.2 Compatible services and codecs 58g37.2.15.3 Specification 58g37.2.16 PP Type 6: PPs with external 2 wire, 3,1 kHz telephony inter
26、face . 58g37.2.16.1 Introduction . 58g37.2.16.2 Compatible services and codecs 58g37.2.16.3 Specification 58g37.3 Audio transmission types applicable to Fixed Parts . 59g37.3.1 FP Type 0: Reference FP (ReFP) 59g37.3.2 FP Type 1a: “classical“ Fixed Part for ISDN Network . 60g37.3.2.1 Introduction . 6
27、0g37.3.2.2 Compatible services and codecs 60g37.3.2.3 Specifications 60g37.3.2.3.1 Transcoding and equalization 60g37.3.2.3.2 PP type detection . 60g37.3.2.3.3 Activation of audio processing functions 60g37.3.2.3.4 Transmission specification 61g37.3.3 FP Type 1b: “new“ Fixed Part for ISDN Network .
28、61g37.3.3.1 Introduction . 61g37.3.3.2 Compatible services and codecs 61g37.3.3.3 Specification 61g37.3.3.3.1 Transcoding and equalization 61g37.3.3.3.2 PP type detection . 62g37.3.3.3.3 Activation of audio processing functions 62g37.3.3.3.4 Transmission specification 62g37.3.4 FP Type 2: FP with an
29、alog 2-wire interface, 3,1 kHz service 63g37.3.4.1 Introduction . 63g37.3.4.2 Compatible services, physical interfaces and codecs 63g37.3.4.3 Specification 63g37.3.4.3.1 Transcoding, equalization and conversion 63g37.3.4.3.2 PP type detection and activation of audio processing functions 63g37.3.4.3.
30、3 Transmission specification 63g37.3.5 FP Type 3: VoIP narrowband Fixed Part 64g37.3.5.1 Introduction . 64g37.3.5.2 Compatible services, physical interfaces and codecs 64g37.3.5.3 Specification 64g37.3.5.3.1 Transcoding and equalization 64g37.3.5.3.2 PP type detection . 65g37.3.5.3.3 Activation of a
31、udio processing functions 65g37.3.5.3.4 Transmission specification 65g37.3.6 FP Type 4: ISDN wideband Fixed Part 66g37.3.6.1 Introduction . 66g37.3.6.2 Compatible services and codecs 66g37.3.6.3 Specification 66g37.3.6.3.1 Transcoding and equalization 66g37.3.6.3.2 PP type detection . 66g37.3.6.3.3
32、Activation of audio processing functions 66g37.3.6.3.4 Transmission specification 67g37.3.7 FP Type 5: VoIP wideband Fixed Part . 67g37.3.7.1 Introduction . 67g3ETSI ETSI EN 300 176-2 V2.2.1 (2012-07) 67.3.7.2 Compatible services, physical interfaces and codecs 67g37.3.7.3 Specification 68g37.3.7.3.
33、1 Transcoding and equalization 68g37.3.7.3.2 PP type detection . 68g37.3.7.3.3 Activation of audio processing functions 68g37.3.7.3.4 Transmission specification 69g37.3.8 FP Type 6a: FP handling an Internal call inside a DECT FP (any service) 69g37.3.8.1 Introduction . 69g37.3.8.2 Compatible service
34、s, physical interfaces and codecs 69g37.3.8.3 Specification 69g37.3.9 FP Type 6b: FP handling an n-party conference inside a DECT FP (any service) . 69g37.3.9.1 Introduction . 69g37.3.9.2 Compatible services, physical interfaces and codecs 69g37.3.9.3 Specification for the conference bridge. 70g37.3
35、.10 FP Type 7: DECT Repeater part (REP) 70g37.3.10.1 Introduction . 70g37.3.10.2 Compatible services, physical interfaces and codecs 70g37.3.10.3 Specification 70g37.4 Additional features . 70g37.4.1 Introduction. 70g37.4.2 Echo canceller in Fixed Part . 71g37.4.3 Echo suppressor in Fixed Part. 71g3
36、7.5 Transmission characteristics for Portable Parts 72g37.5.1 Transmission characteristics for Portable Part type 1a (“Classic GAP“ handset) . 72g37.5.1.1 PP frequency responses . 72g37.5.1.1.1 Sending 72g37.5.1.1.2 Receiving . 73g37.5.1.2 PP sending and receiving loudness ratings 73g37.5.1.2.1 Nomi
37、nal values 73g37.5.1.2.2 User-controlled volume control in PP . 74g37.5.1.2.3 PP adaptive volume control . 75g37.5.1.3 Sidetone . 75g37.5.1.3.1 Talker sidetone 75g37.5.1.3.2 Listener sidetone 75g37.5.1.4 Terminal coupling loss 77g37.5.1.4.1 Weighted Terminal Coupling Loss (TCLw) 77g37.5.1.4.2 Stabil
38、ity loss 78g37.5.1.5 Distortion 79g37.5.1.5.1 Sending 79g37.5.1.5.2 Receiving . 79g37.5.1.5.3 Sidetone . 80g37.5.1.6 Out of band signals 80g37.5.1.6.1 Sending (discrimination against out of band input signals) . 80g37.5.1.6.2 Receiving (spurious out of band signals) . 80g37.5.1.7 Noise . 81g37.5.1.7
39、.1 Sending 81g37.5.1.7.2 Band-limited noise. 81g37.5.1.7.3 Receiving . 81g37.5.1.7.4 Level of sampling frequency (receiving) . 82g37.5.1.8 Acoustic shock 82g37.5.1.8.1 Continuous signal 82g37.5.1.8.2 Peak signal. 82g37.5.1.9 PP Delay 82g37.5.1.10 PP ambient noise rejection 84g37.5.2 Additional requi
40、rements for PP type 1b (“improved GAP“ handset) . 84g37.5.2.1 Terminal coupling loss 84g37.5.2.1.1 Weighted Terminal Coupling Loss (TCLw) 84g37.5.2.2 Attenuation Range in Sending Direction during Double Talk AH,S,dt85g37.5.2.3 Attenuation Range in Receiving Direction during Double Talk AH,R,dt86g37.
41、5.2.4 Activation in Sending Direction 87g37.5.2.5 Activation in Receiving Direction . 88g37.5.3 Transmission characteristics for PP types 1c and 1d (HATS tested, narrowband telephony handsets) 89g3ETSI ETSI EN 300 176-2 V2.2.1 (2012-07) 77.5.3.1 PP frequency responses . 89g37.5.3.1.1 Sending 89g37.5
42、.3.1.2 Receiving . 90g37.5.3.2 PP sending and receiving loudness ratings 93g37.5.3.2.1 Nominal values 93g37.5.3.2.2 User-controlled volume control in PP . 94g37.5.3.2.3 PP adaptive volume control . 95g37.5.3.3 Sidetone . 95g37.5.3.3.1 Talker sidetone 95g37.5.3.3.2 D Factor . 95g37.5.3.3.3 Sidetone d
43、elay . 96g37.5.3.4 Terminal coupling loss 97g37.5.3.4.1 TCLw of Portable Part . 97g37.5.3.4.2 Stability loss 97g37.5.3.5 Distortion 98g37.5.3.5.1 Sending Distortion . 98g37.5.3.5.2 Receiving Distortion 99g37.5.3.6 Out of band signals 99g37.5.3.6.1 Out-of-Band Signals in Send direction 99g37.5.3.6.2
44、Out-of-band signals in receiving direction 100g37.5.3.7 Noise . 100g37.5.3.7.1 Sending 100g37.5.3.7.2 Receiving . 101g37.5.3.8 Acoustic shock 101g37.5.3.8.1 Continuous signal 101g37.5.3.8.2 Peak signal. 101g37.5.3.9 Delay. 102g37.5.3.10 Variation of gain with input level-sending 102g37.5.3.11 Double
45、 Talk Performance . 103g37.5.3.11.1 Attenuation Range in Sending Direction during Double Talk AH,S,dt103g37.5.3.11.2 Attenuation Range in Receiving Direction during Double Talk AH,S,dt. 105g37.5.3.11.3 Detection of Echo Components during Double Talk . 106g37.5.3.11.4 Minimum activation level and sen
46、sitivity of double talk detection . 107g37.5.3.12 Switching characteristics . 107g37.5.3.12.1 Activation in Sending Direction 107g37.5.3.12.2 Activation in Receiving Direction . 108g37.5.3.12.3 Silence Suppression and Comfort Noise Generation . 109g37.5.3.12.4 Performance in sending direction in the
47、 presence of background noise 109g37.5.3.12.5 Speech Quality in the Presence of Background Noise. 110g37.5.3.12.6 Quality of Background Noise Transmission (with Far End Speech) . 110g37.5.3.12.7 Quality of background noise transmission (with Near End Speech) . 110g37.5.3.13 Quality of echo cancellat
48、ion 111g37.5.3.13.1 Temporal echo effects . 111g37.5.3.13.2 Spectral Echo Attenuation . 111g37.5.4 Transmission characteristics for PP types 3a and 3b (narrowband loudspeaking and handsfree devices) . 112g37.5.4.1 Sending sensitivity/frequency response 112g37.5.4.2 Receive sensitivity/frequency resp
49、onse. 113g37.5.4.3 Sending loudness rating 116g37.5.4.4 Receive loudness rating . 117g37.5.4.5 Sending distortion . 118g37.5.4.6 Receiving distortion 118g37.5.4.7 Out-of-band signals in sending direction 119g37.5.4.8 Out-of-band signals in receiving direction 119g37.5.4.9 Sending noise 120g37.5.4.10 Receiving noise . 120g37.5.4.11 Terminal Coupling Loss of PP 121g37.5.4.12 Stability Loss of PP . 121g37.5.4.13 Double Talk Performance . 122g37.5.4.13.1 Attenuation Range in Sending Direction during Double Talk AH,S,dt122g37.5.4.13.2 Attenuation Range in Receiving Direction duri
