1、 TIA-920.130-A (Revision of TIA-920) February 2011Telecommunications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones with Headset NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderst
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6、ct No. 3-4705.130-RV1, formulated under the cognizance of the TIA TR-41 User Premises Telecommunications Requirements, TR-41.3 Subcommittee on Analog and Digital Wire line Terminals. Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION Standards and Technology Department 2500 Wilson Boulevard Arling
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22、T OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. TIA-920.130-A i Table of Contents 1. SCOPE 1 1.1. LIMITS OF APPLICABILITY 1 1.2. CATEGORIES OF CRITERIA 1 1.3. FCC PART 68 2 1.4. ENVIRONMENTAL . 2 1.5. SAFETY . 2 2. NORMATIVE REFERENCES
23、3 3. DEFINITIONS, ABBREVIATIONS AND ACRONYMS . 4 3.1. DEFINITIONS . 4 3.1.1. Artificial Ear/Mouth .and Ear/Mouth Simulators . 4 3.1.2. Codec 4 3.1.3. Direct Digital Signal Processing . 4 3.1.4. Ear Reference Point (ERP) . 4 3.1.5. Electric Power and Noise Levels 4 3.1.6. Mouth Reference Point (MRP)
24、. 4 3.1.7. Nominal Volume Control Setting . 4 3.1.8. Preferred Ear Simulator 4 3.1.9. Recommended Test Position (RTP) 4 3.1.10. Reference Codec 4 3.1.11. Sound Pressure Level. 5 3.2. ABBREVIATIONS AND ACRONYMS . 5 4. GENERAL TECHNICAL REQUIREMENTS 6 4.1. REFERENCE CODECS 6 4.1.1. L16-256 Reference C
25、odec 6 4.1.2. Other Reference Codecs 7 4.2. TEST SIGNALS. 7 4.2.1. Choice of Test Signal 7 4.2.2. Analysis. 7 4.2.3. Analysis Limitation Using ITU-T P.50. 7 4.3. PRECAUTIONS. 7 4.4. TEST ARRANGEMENTS . 8 4.4.1. Reference Codec Arrangement . 8 4.4.2. Direct Digital Signal Processing Arrangement . 8 4
26、.4.3. Send General Test Setup Arrangement . 8 4.4.4. Receive General Test Setup Arrangement 9 5. HEADSET TECHNICAL REQUIREMENTS . 10 5.1. SEND. 10 5.1.1. Headset Send Frequency Response. 10 5.1.2. Headset Wideband Send Loudness Rating (SLR). 12 5.1.3. Headset Send Noise 12 5.1.4. Headset Send Single
27、 Frequency Interference . 12 5.1.5. Headset Send Distortion and Noise. 13 5.1.6. Headset Send Delay 14 5.2. RECEIVE 16 TIA-920.130-A ii 5.2.1. Headset Receive Frequency Response 16 5.2.2. Headset Wideband Receive Loudness Rating (RLR)18 5.2.3. Headset Receive Noise 18 5.2.4. Headset Receive Single F
28、requency Interference .18 5.2.5. Headset Receive Distortion and Noise 19 5.2.6. Headset Receive Delay21 5.3. HEADSET TALKER SIDETONE22 5.3.1. Headset Sidetone Masking Rating (STMR) 22 5.3.2. Headset Sidetone Delay.22 5.4. ECHO RETURN LOSS AND STABILITY .23 5.4.1. Weighted Terminal Coupling Loss (TCL
29、w)23 5.4.2. Stability Loss.24 ANNEX A (NORMATIVE) CALCULATION OF LOUDNESS RATINGS AND SIDETONE MASKING RATING 26 A.1 WIDEBAND SEND LOUDNESS RATING (HANDSET AND HEADSET): .26 A.2 WIDEBAND RECEIVE LOUDNESS RATING (HANDSET AND HEADSET): 26 A.3 SIDETONE MASKING RATING (HANDSET AND HEADSET):.27 ANNEX B (
30、NORMATIVE) DRP TO ERP TRANSFER FUNCTION.28 ANNEX C (INFORMATIVE) MEASUREMENT AND LEVEL CONVERSIONS.29 ANNEX D (INFORMATIVE) R40 PREFERRED FREQUENCIES .30 ANNEX E (INFORMATIVE) RECEIVE ACOUSTIC LIMITING 32 ANNEX F (INFORMATIVE) TRANSMISSION REQUIREMENTS FOR WIDEBAND DIGITAL WIRELINE TELEPHONES DOCUME
31、NT(S)33 ANNEX G (INFORMATIVE) BIBLIOGRAPHY35 TIA-920.130-A iii Table of Figures Figure 1 Digital Telephone Set Test Arrangement with Reference Codec .8 Figure 2 Digital Telephone Set Test Arrangement using Direct Digital Signaling.8 Figure 3 Headset Send Test Setup Arrangement.9 Figure 4 Headset Rec
32、eive Test Setup Arrangement9 Figure 5 Headset Send Frequency Response Mask.11 Figure 6 Headset Receive Frequency Response Mask at ERP17 Figure 7 Terminal Coupling Loss Measurement Method .24 Figure 8 Reference Corner 25 Table of Tables Table 1 Co-ordinates of Headset Send Response Limits 11 Table 2
33、Limits for Send SDNR vs Frequency.13 Table 3 Limits for Send SDNR vs Level.13 Table 4 Send SDNR Stimulus Center Frequencies and Band Limits14 Table 5 Send SDNR Analysis Notch Frequency Band .14 Table 6 Headset Send Delay Requirements 15 Table 7 Co-ordinates of Headset Receive Response Limits at ERP
34、.17 Table 8 Limits for Receive SDNR vs. Frequency.19 Table 9 Limits for Receive SDNR vs Level19 Table 10 Receive SDNR Stimulus Center Frequencies and Band Limits.20 Table 11 Receive SDNR Analysis Notch Frequency Band 20 Table 12 Headset Receive Delay Requirements21 Table A.1 (Ref. ITU-T P.79 Annex A
35、, Table A.2 and Table B.2) Weighting factors for calculating wideband loudness ratings and STMR .27 Table B.1 DRP to ERP Correction Factors .28 Table D.1 ISO R40 and R10 Preferred Frequencies, 1/12thand 1/3rdOctave Frequencies30 TIA-920.130-A iv FOREWORD (This foreword is not part of this standard.)
36、 This document is a TIA Telecommunications standard produced by Working Group TR-41.3.3 of Committee TR-41. This standard was developed in accordance with TIA procedural guidelines, and represents the consensus position of the Working Group and its parent Subcommittee TR-41.3, which served as the fo
37、rmulating group. This standard is based on TIA-920. There are six annexes in this Standard. Annex A and Annex B are normative and are considered part of this Standard. Annex C, Annex D Annex E and Annex G are informative and are not considered part of this Standard. The leadership of the TR-41.3.3 V
38、oIP and PCM Digital Transmission Performance Working Group (Chair: Al Baum, Uniden and Allen Woo, Plantronics) acknowledge the written contributions provided by the following individuals in the development of this standard. Organization Representative Previous Version TIA-920.130-APlantronics Allen
39、Woo 9 9 Editor Texas Instruments Warren Karapetian - 9 Editor AST Technology Labs Don McKinnon 9 Editor Nortel Networks Roger Britt 9 Editor 9 Siemens Ron Magnuson 9 Editor Alcatel Francois Pinier 9 AST Technology Labs James Bress - 9 Bob Young & Associates Bob Young 9 9 Cisco Systems Ram Jagadeesan
40、 9 Cisco Systems Michael Knappe 9 Cisco Systems Kirit Patel 9 Consultant in Electroacoustics John Bareham 9 9 CenturyLink Amar Ray 9 IEEE STIT John Bareham 9 9 IEEE STIT Rodolfo Ceruti 9 IEEE STIT Glenn Hess 9 IEEE STIT Bob Young 9 Intel Corporation Mike Dunn 9 Microsoft Hong Sodoma 9 MWM Acoustics
41、Glenn Hess 9 9 Nortel Networks Steve Graham 9 PictureTel Corporation Dave Lindbergh 9 Plantronics Steve Graham 9 Plantronics Bill Rains - 9 Polycom Peter Baker 9 Texas Instruments Tom Harley 9 Uniden Al Baum 9 Vtech Steve Whitesell 9 TIA-920.130-A v Copyrighted parts of ITU-T Appendix I to Recommend
42、ation G.113 and Recommendation P.79 are used with permission of the ITU. The ITU owns the copyright for the ITU Recommendations. Copyrighted parts of ISO 3 are used with permission of the ISO. The ISO owns the copyright for the ISO Standards. Suggestions for improvement of this standard are welcome.
43、 They should be sent to: Telecommunications Industry Association Engineering Department Suite 300 250 Wilson Boulevard Arlington, VA 22201 ( http:/www.tiaonline.org ) TIA-920.130-A vi Introduction This revision of TIA-920 establishes headset telephone audio performance requirements for wideband digi
44、tal wireline telephones regardless of protocol or digital format. Significant improvements and corrections have been made, particularly related to the use of improved ear simulators. This standard addresses wideband performance, where wideband is nominally defined as the frequency range between 150
45、and 6800 Hz. Requirements for conventional narrowband telephony, in the frequency range between 300 and 3400 Hz are defined in ANSI/TIA-810-B. TIA-920.130-A 1 Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones with Headsets 1. Scope This standard establis
46、hes transmission performance requirements for headset devices that function as a wideband digital wireline telephone. Transmission may be over any digital interface including Local or Wide Area Networks, Firewire/IEEE Std 1394, Universal Serial Bus (USB), public ISDN or digital over twisted pair wir
47、e. This includes TDM-based and packet-based (e.g. VoIP) telephones. These telephones may be connected through modems, voice gateways, wireless access points, or PBXs, or they may be personal computer-based telephones. Examples include, but are not limited to: ISDN telephones, digital proprietary tel
48、ephones, VoIP telephones (corded and cordless), softphones running on personal computers, IEEE Std 802.11 telephones, USB telephony devices, DECT (CAT-iq) telephones, Bluetoothtelephony devices, and HD (High Definition) voice telephony devices. Some telephone systems consist of a host (such as a lap
49、top computer) with an interface for a Universal Serial Bus (USB) or Bluetooth device. If the host device is assumed to have a 0 dB loss plan in its default state, then the relevant clauses of this standard are directly applicable to the USB or Bluetooth device. If the host system provides gain or loss in the send path, receive path, or both, then the relevant clauses of this standard apply to the composite system. The test measurement methods in this stan
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