Vehicle Audio Parameter Configuration for Hands-Free Communication
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Solution Overview
Problem
Vehicle hands-free communication systems experience noise, echo, and equalization disturbances due to the variety of mobile communications devices used, which affect communication quality.
Innovation Solution
A method is presented to configure vehicle user interfaces by linking a mobile communications device with the vehicle interface, placing an evaluation call, and analyzing audio data to determine and set optimal audio parameters, such as noise reduction and echo cancellation, specific to each device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed audio configuration is used in the vehicle user interface, then device complexity is reduced, but communication quality deteriorates due to noise, echo, and equalization disturbances varying across different mobile devices
Solution Approach 1:
The system performs preliminary audio evaluations by placing test calls to various mobile devices before actual use. Audio parameters such as noise reduction, echo cancellation, and equalization are pre-configured based on these evaluations, so that when a user connects their device, the optimal settings are already in place, eliminating the need for real-time adjustment and ensuring high communication quality without user intervention
Solution Approach 2:
The system automatically adjusts multiple audio parameters including noise reduction levels, echo cancellation strength, and equalization profiles based on the specific mobile device being used. By changing these parameters dynamically according to device characteristics, the system maintains high communication quality across different devices without requiring manual configuration from users
2Reliability
If customized audio parameters are configured for each mobile device, then communication quality is improved, but the time required for configuration increases
Solution Approach 1:
Audio evaluations and parameter configurations are performed in advance during system setup or initial device pairing. The system automatically conducts test calls, analyzes audio performance, and stores optimal parameter sets for each device type, so that subsequent connections use pre-determined settings immediately, eliminating time loss during actual communication
Solution Approach 2:
The system performs self-configuration by automatically evaluating audio parameters and selecting optimal settings without requiring user intervention. The configuration process operates autonomously, comparing different parameter combinations and selecting the best match based on measured performance, thereby reducing configuration time while maintaining high communication quality
3Manufacturing precision
If comprehensive audio evaluations are performed for each device, then manufacturing precision of audio settings is improved, but device complexity increases
Solution Approach 1:
The audio evaluation process is divided into distinct segments: noise reduction evaluation, echo cancellation evaluation, and equalization evaluation. Each segment tests specific audio parameters independently, allowing the system to precisely configure each parameter based on its specific performance characteristics without being overwhelmed by the complexity of evaluating all parameters simultaneously
Solution Approach 2:
The system systematically varies audio parameters during evaluation, testing different levels of noise reduction, echo cancellation, and equalization settings. By methodically changing and measuring the effect of each parameter, the system achieves precise audio configuration while managing complexity through structured parameter exploration rather than exhaustive testing
Data Source
AI summary
A system and method for configuring a vehicle user interface that provides hands-free use of a mobile communications device by a vehicle operator. First, the mobile communications device located at a vehicle is linked with a vehicle user interface in the vehicle so that the driver or other occupant can carry out hands-free telephone calls through the mobile device. Then, an evaluation phone call is placed using the mobile device so that volume levels, noise, etc. can be checked. Based on an analysis of that evaluation call, at least one audio parameter of the vehicle user interface is configured and is thereafter used to improve the audio communication between the user and the vehicle user interface.