IEEE 1329-1999

$79.08

IEEE Standard Method for Measuring Transmission Performance of Handsfree Telephone Sets

Published By	Publication Date	Number of Pages
IEEE	1999

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Description

New IEEE Standard – Superseded. Techniques for objective measurement of electroacoustic and voice switching characteristics of analog and digital handsfree telephones (HFTs) are provided. Due to the various characteristics of HFTs and the environments in which they operate, not all of the test procedures in this standard are applicable to all HFTs. Application of the test procedures to a typical HFTs should be determined on an individual basis.

PDF Catalog

PDF Pages	PDF Title
1	Title Page
3	Introduction Participants
5	CONTENTS
7	1. Overview 1.1 Scope 1.2 Purpose
8	1.3 Contents of this standard 1.4 How to use this standard
9	2. References
10	3. Definitions
14	4. Abbreviations, acronyms, and symbols
16	5. Test methods 5.1 General 5.2 FFT and cross-spectrum analysis
17	5.3 Real-time filter analysis (RTA) 5.4 Sine-based analysis
18	5.5 Simulated free-field techniques
19	6. Test signals 6.1 General 6.2 Classifications 6.3 Modulation types
20	6.4 Deterministic signals 6.5 Random signals
21	6.6 Speech-like signals 6.7 Compound signals
23	6.8 Test signal bandwidth 6.9 Signal parameter summary
24	6.10 Signal and test method comparative summary
25	7. Test equipment, environment, and impairments 7.1 General 7.2 Test equipment
26	7.3 Test environment
29	7.4 Impairments
30	8. Test calibration 8.1 Measurement bandwidth and resolution 8.2 Send
33	8.3 Receive and echo 9. Transmission measurements 9.1 General
34	9.2 Positioning of HFT and test transducers
37	9.3 Send
42	9.4 Receive
47	9.5 Echo path response 10. Voice switching measurements 10.1 General 10.2 Classification
48	10.3 Switching parameters 10.4 Test conditions
49	10.5 Test parameters
55	11. Acoustic echo canceller measurements
56	11.1 Test signals
57	11.2 Test conditions 11.3 Round trip EPD 11.4 TCL—single talk
58	11.5 Convergence time (Tc) 11.6 Temporally weighted terminal coupling loss—double talk (TCLTDT) 11.7 Send speech attenuation during double talk (ASDT)
59	11.8 Receive speech attenuation during double talk (ARDT)
60	11.9 Send speech front end clipping time during double talk (TSFDT) 11.10 Receive speech front end clipping time during double talk (TRFDT)
61	Annex A—Simulated speech generator
63	Annex B—TDS sweep with noise bursts
64	Annex C—Hoth room noise
67	Annex D—Useful conversion procedures
69	Annex E—Recommended test bed
74	Annex F—Detailed test methodology for temporally weighted TCL
77	Annex G—TCLT test algorithm
81	Annex H—Double-talk testing
90	Annex I—HFT mi crophones
91	Annex J—1/3 octave passbands
92	Annex K—DRP TO ERP corrections for HATS receive measurements
94	Annex L—Bibliography