12.14 D60032e1 Valid since standard implementation Rev. 01, subject to change

Data Sheet

UG GOST R55531-WB (Code 60032)

Communication Quality Evaluation of Emergency Call Devices, Wideband Extension

OVERVIEWThe Russian standard GOST R 55531-

2013 (ERA-GLONASS) provides test methods for verification of in-vehicle emergency call system conformity to quality requirements for loudspeaker communication in vehicle cabins.

The tests described by the standard ERA-GLONASS have been implemented by HEAD acoustics as measurement standard UG GOST R55531-WB for the communication analysis system ACQUA. This optional upgrade provides wide-band measurements as extension of the narrowband measurements contained in GOST R55531-NB (Code 60030).

UG GOST R55531-WB can be used by manufacturers and suppliers of the au-tomotive industry to qualify and optimize emergency call systems.

DESCRIPTION

The Russian standard GOST R 55531-2013 (ERA-GLONASS) defines test meth-ods regarding the communication quality of emergency call systems in cars. The requirements and measurements for the wideband range described in this standard have been implemented by HEAD acoustics for use with the communication analysis system ACQUA as measurement standard UG GOST R55531-WB.

The tests implemented in UG GOST R55531-WB cover all requirements with regard to communication quality in the wideband range. UG GOST R55531-WB allows the automated quality analysis and experimental optimization of in-vehicle emergency call systems.

UG GOST R55531-WB comprises nu-merous standard values such as loudness rating, idle channel noise in sending and receiving direction, spectral echo attenua-tion and suppression of out-of-band sig-nals. In addition, UG GOST R55531-WB takes into account several other important aspects:• Tests under different conditions for e.g.

vehicle movement (standing with en-gine switched on/off), vehicle environ-ment (quiet street, heavy-traffic route), vehicle windows (open/closed), talker location (driver seat, seat next to driver or seat back from driver), talker speech level (normal, weak, loud).

Note: Car sounds are not included

• Artificial head measurement system as “user” of the emergency call system.

• Primary focus on conversation param-eters such as double talk performance and quality of background noise trans-mission.

Some of the measurements have partially been developed out of ITU-T Recommenda-tion P.1110 for speech quality assessment of wideband car hands-free terminals.

APPLICATIONS• Automated quality analysis of

in-vehicle emergency call systems• Experimental development and

optimization of in-vehicle emergen-cy call systems

TEST SIGNALS• Composite Source Signals (CSS)• Artificial voice• Speech sequences• CSS combinations for double talk

simulation• AM/FM modulated sine signals for

echo measurements

SYSTEM REQUIREMENTSUG GOST R55531-WB (Code 60032) requires the following system components:• GOST R55531-NB (Code 60030),

Emergency Call (eCall) Devices, Nar-rowband Part;

alternatively:

UG GOST R55531-NB (Code 60031), upgrade from P.1100 (Code 6797) to GOST R55531-NB

• ACQUA (Code 6810 etc.), Ad-vanced Communication Quality Analy-sis System, Version 3.2.100 or later

Note: existing customers need a valid software maintenance agreement (SMA)

• MFE VI.1 (Code 6462), analog USB measurement front end with option MFE VI-BEQ (Code 6461)

• HMS II.3-33 (Code 1230.1), arti-ficial HEAD Measurement System with pinna type 3.3 or HMS II.3-34 (Code 1230.2), with pinna type 3.4 or HMS II.6 (Code 1389), with artifi-cial mouth and free-field microphones

• HAE-car, Background Noise Simula-tion, cf. separate data sheet for Code 6970

• Radio Communication Tester, e.g. R&S CMU200 or R&S CMW500 (not delivered by HEAD acoustics)

OPTIONS• ACOPT 10 (Code 6820), Option

TOSQA, for MOS-LQO tests (see list of measurements)

• ACOPT 30 (Code 6857), Option POLQA, for MOS-LQO tests (see list of measurements)

Measurement tree and result diagram for UG GOST R55531-WB in communication analysis system ACQUA

12.14 D60032e1 Valid since standard implementation Rev. 01, subject to change

represented by

MEASUREMENTS

The following list gives an overview of the measurements included in UG GOST R55531-WB test suite:

Measurement setup in real car cabin

DELIVERY ITEMS• UG GOST R55531-WB (Code

60032), as ACQUA database• V2C File (for ACQUA, Version

3.2.100 or later)• Documentation as PDF