SIST ES 203 038 V1.1.1:2009

SLOVENSKI STANDARD
SIST ES 203 038 V1.1.1:2009
01-julij-2009
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Speech and multimedia Transmission Quality (STQ) - Requirements and tests methods

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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Intellectual Property Rights ................................................................................................................................ 6

Foreword ............................................................................................................................................................. 6

Introduction ........................................................................................................................................................ 6

1 Scope ........................................................................................................................................................ 7

2 References ................................................................................................................................................ 8

2.1 Normative references ......................................................................................................................................... 8

2.2 Informative references ........................................................................................................................................ 9

3 Definitions, symbols and abbreviations ................................................................................................... 9

3.1 Definitions .......................................................................................................................................................... 9

3.2 Symbols ............................................................................................................................................................ 10

3.3 Abbreviations ................................................................................................................................................... 10

4 Speech transmission aspects ................................................................................................................... 10

4.1 General ............................................................................................................................................................. 10

4.1.1 Polarity independence ................................................................................................................................. 10

4.1.2 Feed conditions ........................................................................................................................................... 11

4.1.3 Power supply .............................................................................................................................................. 11

4.1.4 Volume control ........................................................................................................................................... 11

4.1.5 Test setup .................................................................................................................................................... 11

4.1.6 Environment for tests .................................................................................................................................. 12

4.1.7 Accuracy of measurements and test equipment setting .............................................................................. 12

4.1.8 Order of tests............................................................................................................................................... 12

4.1.9 Acoustic environment ................................................................................................................................. 12

4.1.10 Alternative test methods ............................................................................................................................. 13

4.1.11 Testing arrangements .................................................................................................................................. 13

4.2 Speech performance characteristics.................................................................................................................. 16

4.2.1 Sensitivity/frequency response ................................................................................................................... 16

4.2.1.1 Sending Sensitivity ............................................................................................................................... 16

4.2.1.2 Receiving Sensitivity ............................................................................................................................ 17

4.2.2 Sending and Receiving Loudness Ratings (SLR and RLR) ........................................................................ 19

4.2.2.1 Sending Loudness Rating (SLR) ........................................................................................................... 19

4.2.2.2 Receiving Loudness Rating (RLR) ....................................................................................................... 19

4.2.3 Sidetone ...................................................................................................................................................... 20

4.2.4 Distortion .................................................................................................................................................... 21

4.2.4.1 Sending distortion ................................................................................................................................. 21

4.2.4.2 Receiving distortion .............................................................................................................................. 22

4.2.5 Linearity (variation of gain with input level) .............................................................................................. 23

4.2.5.1 Sending linearity ................................................................................................................................... 23

4.2.5.2 Receiving linearity ................................................................................................................................ 23

4.2.6 Noise ........................................................................................................................................................... 23

4.2.6.1 Sending noise ........................................................................................................................................ 23

4.2.6.2 Receiving noise ..................................................................................................................................... 24

4.2.7 Acoustic shock ............................................................................................................................................ 24

4.2.7.1 Continuous signal .................................................................................................................................. 24

4.2.7.2 Peak signal ............................................................................................................................................ 24

4.2.8 Instability .................................................................................................................................................... 25

4.2.9 Echo Return Loss (ERL) ............................................................................................................................. 26

Annex A (normative): Requirements for LRGP measured terminals ....................................................... 28

A.1 Speech transmission aspects ................................................................................................................... 28

A.1.1 General ............................................................................................................................................................. 28

A.1.1.1 Polarity independence ................................................................................................................................. 28

A.1.1.2 Feed conditions ........................................................................................................................................... 28

A.1.1.3 Power supply .............................................................................................................................................. 28

A.1.1.4 Volume control ........................................................................................................................................... 28

A.2 Speech performance characteristics ....................................................................................................... 29

A.2.1 Sensitivity/frequency response ......................................................................................................................... 29

A.2.1.1 Sending Sensitivity ..................................................................................................................................... 29

A.2.1.2 Receiving Sensitivity .................................................................................................................................. 29

A.2.2 Sending and Receiving Loudness Ratings (SLR and RLR) ........................................................................ 30

A.2.2.1 Sending Loudness Rating (SLR) ........................................................................................................... 30

A.2.2.2 Receiving Loudness Rating (RLR) ....................................................................................................... 31

A.2.3 Sidetone ...................................................................................................................................................... 31

A.2.4 Distortion .................................................................................................................................................... 31

A.2.4.1 Sending distortion ................................................................................................................................. 31

A.2.4.2 Receiving distortion .............................................................................................................................. 31

A.2.5 Linearity (variation of gain with input level) .............................................................................................. 32

A.2.5.1 Sending linearity ................................................................................................................................... 32

A.2.5.2 Receiving linearity ................................................................................................................................ 32

A.2.6 Noise ........................................................................................................................................................... 32

A.2.6.1 Sending noise ........................................................................................................................................ 32

A.2.6.2 Receiving noise ..................................................................................................................................... 32

A.2.7 Instability .................................................................................................................................................... 33

A.2.8 Echo Return Loss (ERL) ............................................................................................................................. 33

Annex B (normative): Speech transmission compliance tests for LRGP measured terminals ................ 34

B.1 General conditions for testing ................................................................................................................ 34

B.1.1 Environment for tests ....................................................................................................................................... 34

B.1.2 Accuracy of measurements and test equipment setting .................................................................................... 34

B.1.3 Order of tests .................................................................................................................................................... 35

B.1.4 Acoustic environment ....................................................................................................................................... 35

B.1.5 Handset mounting............................................................................................................................................. 35

B.1.6 Test levels ......................................................................................................................................................... 35

B.1.6.1 Sending ....................................................................................................................................................... 35

B.1.6.2 Receiving .................................................................................................................................................... 35

B.1.6.3 Sidetone ...................................................................................................................................................... 35

B.1.7 Volume control ................................................................................................................................................. 35

B.1.8 Test equipment requirements ........................................................................................................................... 36

B.1.9 Alternative test methods ................................................................................................................................... 36

B.1.10 Testing arrangements ....................................................................................................................................... 36

B.2 Speech transmission performance tests for LRGP measured terminals ................................................. 39

B.2.1 Sensitivity/frequency response ......................................................................................................................... 39

B.2.1.1 Sending sensitivity ...................................................................................................................................... 39

B.2.1.2 Receiving sensitivity ................................................................................................................................... 39

B.2.2 Loudness ratings ............................................................................................................................................... 40

B.2.2.1 Sending loudness rating .............................................................................................................................. 40

B.2.2.2 Receiving loudness rating ........................................................................................................................... 40

B.2.3 Sidetone ............................................................................................................................................................ 41

B.2.4 Distortion .......................................................................................................................................................... 42

B.2.4.1 Sending distortion ....................................................................................................................................... 42

B.2.4.2 Receiving distortion .................................................................................................................................... 43

B.2.5 Linearity (variation of gain with input level) ................................................................................................... 43

B.2.5.1 Sending linearity ......................................................................................................................................... 43

B.2.5.2 Receiving linearity ...................................................................................................................................... 43

B.2.6 Noise ................................................................................................................................................................ 44

B.2.6.1 Sending noise .............................................................................................................................................. 44

B.2.6.2 Receiving noise ........................................................................................................................................... 44

B.2.7 Instability .......................................................................................................................................................... 45

B.2.8 Echo Return Loss (ERL) .................................................................................................................................. 47

Annex C (informative): Table of changes relative to TBR 38 .................................................................... 48

Annex D (informative): Bibliography ........................................................................................................... 51

History .............................................................................................................................................................. 52

IPRs essential or potentially essential to the present document may have been declared to ETSI. The information

pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found

in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in

respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web

Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee

can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web

This ETSI Standard (ES) has been produced by ETSI Technical Committee Speech and multimedia Transmission

The present document has been produced by ETSI in order to update the contents of initial standards for PSTN

In particular, the update aims to take benefits of recent improvements in test methods and test equipments. Even the

purpose of the standard is to consider Narrowband speech characteristics and test methods, the new test methods leave

In this release 1 of the present document, no new measurement will be added except limitation of acoustic shock which

is a requirement for safety. Previous requirements and test methods are kept in an annex in order to be used for

terminals designed with LRGP method. Status of this annex is planned to be informative, but only in release 2.

The new measurements needed for handset terminal including speech processing functions will be introduced in a

The present document specifies only the technical characteristics for handset telephony and shall be used in conjunction

The present document specifies the technical characteristics (electrical and acoustic requirements and measurement

methods) to be provided by a single, handset telephony, terminal equipment which is intended for connection by 2 wires

to an analogue interface of a PSTN. This interface is characterized by a d.c. loop to indicate seizure and clearing, low

frequency a.c. ringing signals below the speech passband to indicate an incoming call and the transmission phase having

The objective of the present documen is to ensure minimum speech quality when interworking via the public network

The present document only applies to terminal equipment supporting handset telephony.

The present document is applicable to handset telephony function. In the case of multiple functions provided in the

same terminal equipment, the present document does not apply when those other functions are active in conjunction

The present document also applies to any type of analogue handset terminal intended to be connected to a gateway.

The present document specifies the functions necessary to provide 2-way real-time speech conversation. Where a

function is indicated as optional, it needs not to be provided, but, where such a function is provided, the terminal needs

A test is given for each requirement in the present document including measurement methods. The terminal equipment

The present document gives requirements for new test methods based upon use of HATS and new tests signals

In an annex, requirements with test methods corresponding to previous tests methods (LRGP) and test signals are given.

The application of the present document is intended also for handset telephony function employing a radio link

• a handset telephony function with speech transmission performance specially designed for the less abled (e.g.

• a handset telephony function with speech transmission performance specifically designed to cater for hostile

• a handset telephony function employing speech processing techniques other than coding.

NOTE: The terminal equipment may provide additional functions or facilities to those of handset telephony.

References are either specific (identified by date of publication and/or edition number or version number) or

• Non-specific reference may be made only to a complete document or a part thereof and only in the following

- if it is accepted that it will be possible to use all future changes of the referenced document for the

Referenced documents which are not found to be publicly available in the expected location might be found at

NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee

The following referenced documents are indispensable for the application of the present document. For dated

references, only the edition cited applies. For non-specific references, the latest edition of the referenced document

[1] ITU-T Recommendation G.122 (03/93): "Influence of national systems on stability and talker echo

[2] ITU-T Recommendation P.64 (11/07): "Determination of sensitivity/frequency characteristics of

[7] ITU-T Recommendation P.79 (11/07): "Calculation of loudness ratings for telephone sets". .

[8] ITU-T Recommendation O.41 (10/94): "Psophometer for use on telephone-type circuits".

[9] ETSI ES 200 677: "Public Switched Telephone Network (PSTN); Requirements for handset

[11] ITU-T Recommendation P.56 (03/93): " Objective measurement of active speech level".

[12] ITU-T Recommendation P 58 (08/96): "Head and torso simulator for telephony".

[13] ITU-T Recommendation P.501(09/01): "Test signals for use in telephonometry".

[14] ETSI EG 202 518: "Speech Processing, Transmission and Quality Aspects (STQ); Acoustic

[15] ETSI TBR 38 (05/98): "Attachment requirements for a terminal equipment incorporating an

analogue handset function capable of supporting the justified case service when connected to the

The following referenced documents are not essential to the use of the present document but they assist the user with

regard to a particular subject area. For non-specific references, the latest version of the referenced document (including

[i.1] ITU-T Recommendation P 360 (07/06): "Efficiency of devices for preventing the occurrence of

excessive acoustic pressure by telephone receivers and assessment of daily noise exposure of

[i.3] ITU-T Recommendation P.65 (03/93): "Objective instrumentation for the determination of