| Speech quality assessment of mobile phones is quite a challenge due to the various kinds of signal processing involved (e.g. echo cancellation and noise reduction algorithms, various kinds of speech enhancement and processing and the transmission delay itself). |
| All these aspects have a significant influence on conversational speech quality. |
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Operator-specific testing and tuning |
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Automated testing according to current standards such as 3GPP TS 26.131/132 or CTIA Certification Program Test Plan |
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Comprehensive testing of narrowband and wideband mobile devices (handset, handheld hands-free, headset) |
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Tests according to GSMA HD Voice standard to make use of the official logo |
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Tuning and improvement of VoIP and VoLTE terminals |
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Auditory (subjective) testing |
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Mobile Phones
