AVN System Emergency Audio Routing via Terminal Hands-Free
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Solution Overview
Problem
In emergency situations like car accidents, the audio and video navigation (AVN) system's speaker and microphone may be damaged, preventing normal voice calls with telematics center advisers due to damaged exterior amplifiers, digital voice output ports, and communication lines.
Innovation Solution
The AVN system determines if the vehicle's speaker and microphone are abnormal, releases pairing with a paired terminal, and performs a role change to use a hands-free unit, allowing voice calls through a terminal's speaker and microphone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle speaker and microphone are used for SOS service, then the driver can communicate with the telematics center, but the communication fails when the audio system is damaged in a car accident
Solution Approach 1:
The system performs preliminary detection of speaker and microphone status when a car accident is detected, before attempting SOS communication. This allows the system to proactively identify audio system damage and switch to alternative communication methods in advance, ensuring reliable SOS service even when the audio system is damaged
Solution Approach 2:
The terminal device (smartphone) acts as an intermediary for voice communication when the vehicle's audio system is damaged. The system switches from using the vehicle speaker and microphone to using the terminal's speaker and microphone, enabling the terminal to mediate the communication between the driver and the telematics center adviser
2Adaptability or versatility
If the vehicle audio system components (exterior amplifier, digital voice output port, communication line) are present, then voice call functionality is available, but these components are damaged in car accidents preventing normal communication
Solution Approach 1:
The system dynamically switches communication modes based on the operational status of the vehicle audio system. When the speaker or microphone is detected as abnormal, the system automatically transitions from vehicle audio system communication to terminal device communication, providing adaptive versatility that maintains voice call reliability under varying conditions
Solution Approach 2:
The system changes the communication parameters by switching from using vehicle audio system components (speaker, microphone, exterior amplifier, digital voice output port) to using terminal device components. This parameter change enables communication continuity when the original audio system parameters become unavailable due to damage
3Ease of operation
If Bluetooth pairing is maintained with a terminal, then the terminal can be used for communication, but the pairing must be released and reconfigured when switching to hands-free mode
Solution Approach 1:
The system copies the existing Bluetooth pairing information and uses it for alternative communication mode. Instead of requiring complete re-pairing, the system leverages the already-established Bluetooth connection, simply switching the audio routing from vehicle speakers to terminal speakers, thereby maintaining ease of operation without time loss
Data Source
AI summary
A method of operating audio, video, navigation (AVN), an AVN, and a vehicle including the same are disclosed. The method includes determining whether a vehicle speaker and a vehicle microphone connected to the AVN is abnormal when a car accident occurs, releasing pairing with a paired terminal and performing role change of changing the terminal to a hands-free unit (HF) when at least one of the vehicle speaker and the vehicle microphone is abnormal, and performing voice call using a speaker and microphone of the terminal.