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TIA-920 123-2018 Telecommunications Communications Products Transmission Requirements for Digital Interface Communications Devices with Group Speakerphones.pdf

1、 TIA-920.123 March 2018Telecommunications Communications Products Transmission Requirements for Digital Interface Communications Devices with Group Speakerphones ANSI/TIA-920.123-2018 APPROVED: MARCH 16, 2018 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest

2、 through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for their particular need. The existence of such Standards and Public

3、ations shall not in any respect preclude any member or non-member of TIA from manufacturing or selling products not conforming to such Standards and Publications. Neither shall the existence of such Standards and Publications preclude their voluntary use by Non-TIA members, either domestically or in

4、ternationally. Standards and Publications are adopted by TIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, TIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard or Public

5、ation. This Standard does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitati

6、ons before its use. Any use of trademarks in this document are for information purposes and do not constitute an endorsement by TIA or this committee of the products or services of the company. (From Standards Proposal No. ANSI/TIA-PN-920.123-D2, formulated under the cognizance of the TIA TR-41 User

7、 Premises Telecommunications Requirements, TR-41.3 Subcommittee on Analog and Digital Wireline Terminals. Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION Technology and Standards Department 1320 N. Courthouse Road, Suite 200 Arlington, VA 22201 U.S.A. PRICE: Please refer to current Catalog of T

8、IA TELECOMMUNICATIONS INDUSTRY ASSOCIATION STANDARDS AND ENGINEERING PUBLICATIONS or call IHS, USA and Canada (1-877-413-5187) International (303-397-2896) or search online at http:/www.tiaonline.org/standards/catalog/ All rights reserved Printed in U.S.A. NOTICE OF COPYRIGHT This document is copyri

9、ghted by TIA. Reproduction of these documents either in hard copy or soft copy (including posting on the web) is prohibited without copyright permission. For copyright permission to reproduce portions of this document, please contact the TIA Standards Department or go to the TIA website (www.tiaonli

10、ne.org) for details on how to request permission. Details are located at: http:/www.tiaonline.org/standards/catalog/info.cfm#copyright or Telecommunications Industry Association Technology (b) there is no assurance that the Document will be approved by any Committee of TIA or any other body in its p

11、resent or any other form; (c) the Document may be amended, modified or changed in the standards development or any editing process. The use or practice of contents of this Document may involve the use of intellectual property rights (“IPR”), including pending or issued patents, or copyrights, owned

12、by one or more parties. TIA makes no search or investigation for IPR. When IPR consisting of patents and published pending patent applications are claimed and called to TIAs attention, a statement from the holder thereof is requested, all in accordance with the Manual. TIA takes no position with ref

13、erence to, and disclaims any obligation to investigate or inquire into, the scope or validity of any claims of IPR. TIA will neither be a party to discussions of any licensing terms or conditions, which are instead left to the parties involved, nor will TIA opine or judge whether proposed licensing

14、terms or conditions are reasonable or non-discriminatory. TIA does not warrant or represent that procedures or practices suggested or provided in the Manual have been complied with as respects the Document or its contents. If the Document contains one or more Normative References to a document publi

15、shed by another organization (“other SSO”) engaged in the formulation, development or publication of standards (whether designated as a standard, specification, recommendation or otherwise), whether such reference consists of mandatory, alternate or optional elements (as defined in the TIA Procedure

16、s for American National Standards) then (i) TIA disclaims any duty or obligation to search or investigate the records of any other SSO for IPR or letters of assurance relating to any such Normative Reference; (ii) TIAs policy of encouragement of voluntary disclosure (see TIA Procedures for American

17、National Standards Annex C.1.2.3) of Essential Patent(s) and published pending patent applications shall apply; and (iii) Information as to claims of IPR in the records or publications of the other SSO shall not constitute identification to TIA of a claim of Essential Patent(s) or published pending

18、patent applications. TIA does not enforce or monitor compliance with the contents of the Document. TIA does not certify, inspect, test or otherwise investigate products, designs or services or any claims of compliance with the contents of the Document. ALL WARRANTIES, EXPRESS OR IMPLIED, ARE DISCLAI

19、MED, INCLUDING WITHOUT LIMITATION, ANY AND ALL WARRANTIES CONCERNING THE ACCURACY OF THE CONTENTS, ITS FITNESS OR APPROPRIATENESS FOR A PARTICULAR PURPOSE OR USE, ITS MERCHANTABILITY AND ITS NONINFRINGEMENT OF ANY THIRD PARTYS INTELLECTUAL PROPERTY RIGHTS. TIA EXPRESSLY DISCLAIMS ANY AND ALL RESPONS

20、IBILITIES FOR THE ACCURACY OF THE CONTENTS AND MAKES NO REPRESENTATIONS OR WARRANTIES REGARDING THE CONTENTS COMPLIANCE WITH ANY APPLICABLE STATUTE, RULE OR REGULATION, OR THE SAFETY OR HEALTH EFFECTS OF THE CONTENTS OR ANY PRODUCT OR SERVICE REFERRED TO IN THE DOCUMENT OR PRODUCED OR RENDERED TO CO

21、MPLY WITH THE CONTENTS. TIA SHALL NOT BE LIABLE FOR ANY AND ALL DAMAGES, DIRECT OR INDIRECT, ARISING FROM OR RELATING TO ANY USE OF THE CONTENTS CONTAINED HEREIN, INCLUDING WITHOUT LIMITATION ANY AND ALL INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF BUSINESS,

22、LOSS OF PROFITS, LITIGATION, OR THE LIKE), WHETHER BASED UPON BREACH OF CONTRACT, BREACH OF WARRANTY, TORT (INCLUDING NEGLIGENCE), PRODUCT LIABILITY OR OTHERWISE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THE FOREGOING NEGATION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS

23、 HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. ANSI/TIA-920.123 Telecommunications Communications Products Transmission Requirements for Digital Interface Communications Devices with Group Speakerphones Formulated under the cognizance of TIA Subcommittee TR-41.3

24、Analog and Digital Wireline Terminals With the approval of TIA Engineering Committee TR-41 Performance and Accessibility for Communications Products ANSI/TIA-PN-920.123 i TABLE OF CONTENTS FOREWORD. IV INTRODUCTION V 1 SCOPE 1 1.1 LIMITS OF APPLICABILITY . 1 1.2 LIMITS OF THIS STANDARD FOR PRODUCT E

25、VALUATION 1 1.3 ENVIRONMENTAL . 2 1.4 SAFETY . 2 2 NORMATIVE REFERENCES 3 3 DEFINITIONS, ABBREVIATIONS AND ACRONYMS 4 3.1 DEFINITIONS . 4 3.2 ABBREVIATIONS AND ACRONYMS . 6 4 TESTING CONSIDERATIONS 7 4.1 GENERAL 7 4.1.1 Test Environment 7 4.1.2 Acoustic Test Interface Equipment .7 4.1.3 Test Signals

26、 .8 4.1.4 Test Position 8 4.1.5 Test Methods .8 4.1.6 Test Points and Range of Requirements 8 4.1.7 Subjective Tests .8 4.2 PRECAUTIONS. 8 4.3 REFERENCE CODECS 9 4.3.1 IETF RFC 3551 L16-256 Wideband Reference Codec 9 4.3.2 ITU-T Recommendation G.711 Narrowband Reference Codec .10 4.3.3 Other Referen

27、ce Codecs 10 4.4 TEST ARRANGEMENTS . 10 4.4.1 Reference Codec Arrangement .11 4.4.2 Direct Digital Signal Generation and Analysis Arrangement .11 4.4.3 Receive General Test Setup Arrangements .12 4.4.4 Send General Test Setup Arrangements 12 4.4.5 Send Level Directionality Test Arrangement 13 4.4.6

28、Terminal Coupling Loss Test Setup Arrangements 14 5 TECHNICAL REQUIREMENTS 15 5.1 CATEGORIES OF CRITERIA . 15 5.2 COMPLIANCE WITH THE STANDARD 15 5.3 RECEIVE PERFORMANCE 16 5.3.1 Receive Output 16 5.3.2 Receive Volume Control .17 5.3.3 Receive Frequency Response 18 5.3.4 Receive Noise Idle Channel .

29、21 5.3.5 Receive Single Frequency Interference (SFI) Idle Channel .21 5.3.6 Receive Noise Active Channel .22 ANSI/TIA-PN-920.123 ii 5.3.7 Receive Distortion and Noise 22 5.3.8 Receive Distortion and Noise Maximum Volume Control Setting 23 5.3.9 Receive Delay 23 5.4 SEND PERFORMANCE . 24 5.4.1 Send O

30、utput .24 5.4.2 Send Frequency Response .25 5.4.3 Send Level Directionality (SLD) 28 5.4.4 Send Noise Without Stimulus 28 5.4.5 Send Single Frequency Interference (SFI) Idle Channel 28 5.4.6 Send Noise With Stimulus .29 5.4.7 Send Distortion and Noise .29 5.4.8 Send Delay 30 5.5 WEIGHTED TERMINAL CO

31、UPLING LOSS (TCLW) 31 5.5.1 Requirement 31 5.5.2 Measurement Method 32 5.6 SUBJECTIVE SPEECH QUALITY AND OBJECTIVE SPEECH QUALITY . 32 5.6.1 Subjective Speech Quality .32 5.6.2 Objective Speech Quality 32 ANNEX A (NORMATIVE) CALCULATION OF LOUDNESS RATINGS 33 A.1 SEND LOUDNESS RATING: . 33 A.2 RECEI

32、VE LOUDNESS RATING: 34 ANNEX B (NORMATIVE) TRANSLATION OF RECEIVE FREQUENCY RESPONSE DATA FROM FF TO ERP . 36 ANNEX C (NORMATIVE) PULSED NOISE SIGNAL-TO-DISTORTION-AND-NOISE RATIO (PN-SDNR) . 38 ANNEX D (INFORMATIVE) RECEIVE ASSISTIVE FEATURES 41 D.1 SPEAKERPHONE RECEIVE TONE CONTROL 41 D.2 SPEAKERP

33、HONE RECEIVE AUTOMATIC GAIN CONTROL (AGC) 41 D.3 SPEAKERPHONE RECEIVE AUTOMATIC LEVEL ENHANCEMENT (ALE) . 41 ANNEX E (INFORMATIVE) MEASUREMENT AND LEVEL CONVERSIONS 42 ANNEX F (INFORMATIVE) ISO FREQUENCIES . 43 ANNEX G (INFORMATIVE) CODEC REFERENCE POINT DEFINITIONS . 45 ANNEX H (INFORMATIVE) BIBLIO

34、GRAPHY . 46 ANSI/TIA-PN-920.123 iii TABLE OF FIGURES Figure 1 Digital Communications Device Test Arrangement with Reference Codec 11 Figure 2 Digital Communications Device Test Arrangement using Direct Digital 11 Figure 3 Receive Test Setup Arrangement . 12 Figure 4 Send Test Setup Arrangement 12 Fi

35、gure 5 Send Level Directionality Test Setup 13 Figure 6 Terminal Coupling Loss Test Setup Arrangement . 14 Figure 7 Wideband Receive Frequency Response Limits 19 Figure 8 Narrowband Receive Frequency Response Limits . 20 Figure 9 Wideband Send Frequency Response Limits . 26 Figure 10 Narrowband Send

36、 Frequency Response Limits 27 Figure B.1 FF to ERP Transformation Curve . 37 Figure C.1 Stimulus, Measurement, and Analysis Bands for PN-SDNR . 38 TABLE OF TABLES Table 1 L16-256 Periodic Sequence for Producing a 1 kHz, 0 dBm0 Sine Wave 9 Table 2 G.711 Periodic Sequence for Producing a 1 kHz, 0 dBm0

37、 Sine Wave . 10 Table 3 Wideband Receive Frequency Response Limits 19 Table 4 Narrowband Receive Frequency Response Limits 20 Table 5 Wideband Send Frequency Response Limits. 26 Table 6 Narrowband Send Frequency Response Limits . 27 Table A.1 Weighting Factors for Wideband Loudness Ratings and Sidet

38、one Masking Rating . 34 Table A.2 Weighting Factors for Narrowband Loudness Ratings 35 Table B.1 FF to ERP Translation Values at 1/12 Octave Band Center Frequencies 36 Table B.2 FF to ERP Translation Values at R40 Frequencies 37 Table C.1 Stimulus and Stimulus Measurement Bands for PN-SDNR 39 Table

39、C.2 Distortion Analysis Notch Bands for PN-SDNR . 40 Table F.1 ISO R-40, ISO R-10, 1/12 Octave and 1/3 Octave Frequencies . 43 Table G.1 0 dBm0 Reference Point for Various Codecs 45 ANSI/TIA-PN-920.123 iv FOREWORD (This foreword is not part of this standard.) This document is a TIA Telecommunication

40、s 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 formulating group. There are eight annexes

41、in this Standard. Annexes A-C are normative and are considered part of this Standard. Annexes D H are informative and are not considered part of this Standard. The leadership of the TR-41.3.3 Digital Interface Communications Device Working Group (Chair: Allen Woo, Plantronics) acknowledges the writt

42、en contributions provided by the following individuals in the development of this standard. Organization Representative TIA-920.123 AST Technology Labs Don McKinnon Editor Whitesell Consulting LLC Stephen Whitesell Copyrighted parts of ITU-T Recommendation P.79 are used with permission of the ITU. T

43、he 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. They should be sent to: Telecommunications Industry Association Technolog

44、y and Standards Department Suite 200 1320 North Courthouse Road Arlington, VA 22201 ( http:/www.tiaonline.org ) ANSI/TIA-PN-920.123 v INTRODUCTION This Standard establishes voice transmission performance requirements for group speakerphone digital interface communications devices. For devices that a

45、lso have a handset or headset or both, standards TIA-920.110-B and TIA-920.130-B, respectively, apply. Group speakerphones are devices intended to be used by multiple individuals in a small to medium setting with users at a distance further away (up to approximately 3 meters (10 feet) than those for

46、 personal speakerphones (typically transmission mode only. ANSI/TIA-PN-920.123 16 5.3 RECEIVE PERFORMANCE The receive performance of a communications device is determined by its electrical-to-acoustical transfer characteristics. To determine the receive performance, requirements for frequency respon

47、se, acoustic output level, distortion, noise, volume control and delay are specified. The test setup arrangement shown in Figure 3 is used for all receive measurements. Some tests do not require the application of an input test signal to the reference codec. As discussed in 4.4.2, direct digital pro

48、cessing may be used for generating the receive bit stream signal in place of the reference codec. If the DUT has an adjustable receive tone control, the tone setting that provides the best tolerance margin to the upper and lower frequency response limits per the measurement method in clause 5.3.3 sh

49、all be used with all other requirements in this Standard. The Nominal Volume Control Setting is to be used when testing for compliance with all other requirements in this Standard unless specified otherwise. Refer to the test procedure in 5.3.1. All receive testing should be performed after a stabilization stimulus of the same amplitude and duration as the primary test signal to ensure the DUT is stable. It may be necessary to repeat the stabilization stimulus until DUT stabilization is reached.

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