(Continuation of Question 4/12) Motivation
Mobile communication is used increasingly in vehicles; an increasing number
of modern cars are equipped with integrated communication systems. In order to
provide a satisfying communication quality under all driving conditions for the
driver as well as for the far end communication partner without distracting the
driver from his main task, advanced hands-free devices are required which
require sophisticated signal processing adapted to the individual car. Within
the current SG 12 a first Recommendation is developed describing the
transmission requirements of for narrowband speakerphones also based on the
output of the FG FITCAR.
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 Telematics vehicle. 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 behaviours and interactions with the vehicle.
The study within the Question is be based on the existing Recommendations
P.340, P.313, P.501, P.502 and P.582 and the ongoing work on P.OLQA and P.ONRA.
The main focus of the Question will be wideband and superwideband
implementations.
Question
The following items are to be considered within the study of the Question:
- How can the driving situation be simulated while covering the most relevant
parameters influencing the speech quality within a laboratory environment?
- Which are the most influencing communicational speech quality parameters in
the driving situation, especially in wideband communication and to what extent
are they different from standard hands-free situations?
- What are the most influential parameters for speech recognition systems in the
driving situation?
- Which of the newly developed methodologies known in ITU can be used and/or
adapted to the car hands-free situation?
- Do different mobile networks and network configurations require individual
setups for specific parameters?
- What is the current state of definition of the behaviour of a wireless or
wired headset in the environment of a Telematics enabled Motor Vehicle?
- What support is needed or currently provided for corded headsets in such a
vehicle?
- What are the desirable features to be presented by the vehicle, and what is
their behaviour when operating with a hands free device?
- What enhancements of the new P.CARHFT Recommendation are needed to be
developed to ensure seamless support for users of hands free devices?
- Considerations on how to help measure and mitigate climate change.
Tasks
The work to be performed should cover the following tasks:
- Define the typical operating conditions to be simulated covering the most
relevant parameters influencing the speech quality within a laboratory
environment.
- Define the typical operating conditions to be simulated covering the most
relevant parameters influencing automated speech recognition performance within
a laboratory environment.
- Laboratory setup and general testing conditions in order to simulate the
driving situation for subjective and objective testing (“Car-simulator”).
- Definition of the environmental conditions for testing the car hands-free
terminal and verifying its acoustical performance characteristics under typical
operating conditions.
- Definition of the wideband telephonometric parameters needed in order to
describe/evaluate the communicational speech quality in typical operating
conditions.
- Specification of all relevant transmission characteristics
- Definition of wideband test signals and testing techniques in order to
evaluate all relevant parameters of modern hands-free terminals which include
highly non linear and time variant signal processing such as background noise
reduction, echo cancellation, AGC, compression.
- Definition of test procedures for evaluating automated speech recognition
- Define requirements, signal levels, and other electrical specifications for a
corded headset jack to be fitted to vehicles.
- Define the performance characteristics and test setup for headsets.
- Capture in Use Cases the proposed behaviour and interactions of a vehicle and
hands-free devices.
- The work will result in an update of the new Recommendation on “Narrowband
Hands-Free Communication in Vehicles” and in a new Recommendation “Wideband
Hands-Free Communication in Vehicles”.
An up-to-date status of work under this Question is contained in the SG 12
Work Programme
http://www.itu.int/ITU-T/workprog/wp_search.aspx?isn_sp=545&isn_sg=551
Relationships Recommendations: P.340, P.313, P.501, P.502, P.582, P.OLQA, P.ONRA Questions: 3/12, 5/12, 6/12, 9/12 Study Groups: ITU-T SG 16
Standardization bodies: ITU-R, 3GPP SA4, 3GPP2, ETSI STQ, ETSI ITS, Bluetooth
SIG, APSC, ISO TC 22/TC 204 |