Wideband hands-free communication in motor vehicles
|Publication Date:||1 January 2019|
The aim of this Recommendation1 is the definition of user scenarios, test methods and requirements for wideband hands-free communication in motor vehicles. This Recommendation covers:
- built-in hands-free systems,
- aftermarket hands-free car kits,
- corded headsets, and
- wireless headsets
to be used in motor vehicles for communication.
Furthermore, the compatibility between narrowband and wideband implementations is addressed. This Recommendation addresses the test of complete systems as well as the subsystems hands-free microphone, and the telephone with short-range wireless transmission link used to transmit the speech signals from the hands-free system to the mobile network.
This Recommendation is applicable to systems where the overall speech bandwidth is wideband, including systems where parts of the chain have greater bandwidth (e.g., wideband hands-free unit with super-wideband cellular transmission).
For testing purposes, the test set-up and the recommended environmental conditions are described.
The methods, the analysis and the performance parameters described in this Recommendation are based on test signals and test procedures, as defined in [ITU-T P.501], [ITU-T P.502], [ITU-T P.340], [ITU-T P.380], [b-ETSI ES 202 739], and [b-ETSI ES 202 740].
Although important subjective testing is outside the scope of this Recommendation, guidance on how to conduct subjective tests can be found in clause 14.