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Question 4

​Objective methods for speech and audio evaluation in vehicles

(Continuation of Question 4/12 - Hands-free communication and user interfaces in vehicles)

Car infotainment systems, telematic services and all types of mobile communication services are used increasingly in vehicles; an increasing number of modern cars are equipped with integrated infotainment, communication systems and connection possibilities to personal devices such as smartphones. In order to provide a good user experience, low driver distraction, satisfying communication quality and optimum dialog quality for all speech based services under all driving conditions, a variety of user interfaces and technologies have to seamlessly interact and to be optimized for the car environment. All services and technologies deployed in the car should not distract the driver from his main task. Advanced hands-free devices are required which require sophisticated signal processing adapted to the individual car to provide superior speech quality for the driver as well as for far end conversational partner. The special needs for emergency calls need to be addressed. Sophisticated speech recognition and dialog systems are needed to use speech based services in the car. In-car communications systems need to be optimized to provide a mostly natural speech enhancement for all types of in-car communications. Zoning concepts allowing the use of different audio-/ speech-based services in different zones within vehicles need to be considered.

The use of headsets or other hands-free devices, is becoming mandated in an increasing number of countries and states throughout the world. A large percentage of the target market for these vehicles will own headsets prior to purchasing a vehicle equipped with infotainment systems. They will expect to continue to use them in the vehicle, and thus will expect the vehicle to exploit the headset. The introduction of wireless headsets (e.g. Bluetooth, 802.11, DECT) requires the definition of standard behaviour and interactions with the vehicle.

So far Recommendations were developed describing the transmission requirements and test methods for narrowband and wideband speakerphones, for subsystems in cars and for narrowband emergency call communication.

The study within the Question is based on the existing Recommendations P.340, P.313, P.501, P.502, P.583, P.1100, P.1110, P.1130, P.1140. The main focus of the Question will be hands-free systems including emergency call systems, subsystem requirements in cars, in car communication systems, speech recognition and speech dialog systems and requirements on the design of user interfaces in the car.

The following Recommendations, in force at the time of approval of this Question, fall under its responsibility:
P.1100, P.1110, P.1130, P.1140

The following items are to be considered within the study of the Question:
Tasks include, but are not limited to:
The work will result in an update of the existing Recommendations P.1100, P.1110, P.1130, P.1140, in a new Recommendation on "Super-wideband and fullband stereo hands-free communication in motor vehicles", in a new Recommendation "Performance requirements for in-car communication systems", a new Recommendation on "Speech recognition system performance requirements and test methods" and in a new Recommendation "User interface requirements for automotive applications". Depending on input, a new Recommendation on "In-car dialog system requirements and test methods" may be developed.

An up-to-date status of work under this Question is contained in the SG12 work programme


Questions Study Groups Standardization bodies