scope:

The present document describes testing methodologies which can be used to objectively evaluate the performance of super-wideband and fullband mobile terminals for speech communication in the presence of background noise.

Background noise is a problem in mostly all situations and conditions and needs to be taken into account in terminal design. The present document provides information about the testing methods applicable to objectively evaluate the speech quality of mobile terminals (including any state-of-the-art codecs) employing background noise suppression in the presence of background noise. The present document includes:

• The method which is applicable to objectively determine the different parameters influencing the speech quality in the presence of background noise taking into account:

- the speech quality;

- the background noise transmission quality;

- the overall quality.

• The model results in comparison with the underlying subjective tests used for the training of the objective model. The underlying languages are: American English, German, Chinese (Mandarin).

• The model validation results.

The present document is to be used in conjunction with:

• ETSI ES 202 396-1 [i.1] which describes a recording and reproduction setup for realistic simulation of background noise scenarios in lab-type environments for the performance evaluation of terminals and communication systems.

• ETSI TS 103 224 [i.19] which describes a sound field reproduction method for terminal testing including a background noise database with background noise scenarios to be used in lab-type environments for the performance evaluation of terminals and communication systems.

• American English speech sentences as enclosed in the present document.