ITU-T - International Telecommunication Union/ITU Telcommunication Sector
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ITU-T P.1120-2017
Scope
This Recommendation provides speech transmission performance and design guidance for automotive hands-free systems that operate around super-wideband (50-14@000Hz) and/or fullband (20-20@000Hz) audio bandwidths and in the future will support stereo telephony. This Recommendation covers: ?C built in hands-free systems@ ?C aftermarket hands-free car kits@ ?C corded headsets@ and ?C wireless headsets@ to be used in motor vehicles for communication. 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]@ and [ITU-T P.581]. This Recommendation takes into account the concept of different acoustic zones targeted to different user positions in the car@ other than just the driver's position. Guidance is provided on the system level (i.e.@ mouth/ear-to-network reference point). For testing purposes@ the test set-up and the recommended environmental conditions are described. Subjective (i.e.@ perceptual) testing for validating a design under real life condition is provided in this Recommendation.
ITU-T P.1120-2017 history
2017ITU-T P.1120-2017 Super-wideband and fullband hands-free communication in motor vehicles (Study Group 12)