Vehicle Audio Control System Multiplexer Prioritization
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Solution Overview
Problem
Existing audio control systems for vehicles often require costly and difficult dashboard modifications to accommodate new audio devices, leading to a less-than-perfect appearance when upgrading from factory-installed systems, and may result in lost information during switching between audio sources.
Innovation Solution
An audio control system that includes a multiplexer, controller, display, and user interface to manage and prioritize multiple audio sources, allowing seamless switching without affecting the dashboard's appearance, using a wiring harness for integration and prioritizing critical sources like navigation and telephone signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If factory-installed audio equipment is removed and replaced with new devices, then audio system functionality is upgraded, but dashboard appearance is compromised and installation complexity increases
Solution Approach 1:
The audio control system is designed to universally accept multiple audio sources (factory radio, CD player, navigation system, cellular phone, MP3 player, DVD player) through a common interface and control architecture, allowing different devices to function through the same system without requiring separate installation processes for each device type
Solution Approach 2:
The patent introduces an audio control system as an intermediary layer between various audio sources and the vehicle's existing audio infrastructure. This mediator handles source selection, signal routing, and control functions, allowing new devices to integrate with the dashboard without physical modification while maintaining a factory-installed appearance
2Adaptability or versatility
If multiple audio sources are added to the vehicle, then audio system versatility is improved, but information loss during switching between sources occurs
Solution Approach 1:
The audio control system maintains continuous audio signal flow by implementing seamless switching between multiple audio sources. The controller ensures that transitions between sources occur without interruption or loss of audio information, maintaining continuous useful action throughout the switching operation
Solution Approach 2:
The system incorporates feedback mechanisms where the controller monitors the status of multiple audio sources and uses this information to make intelligent switching decisions. The display provides visual feedback about the current audio source and switching status, allowing the system to maintain information continuity by selecting appropriate sources based on detected signal presence and quality
3Reliability
If priority-based automatic switching is implemented, then critical audio information is preserved, but system complexity increases
Solution Approach 1:
The audio control system applies different quality levels of control to different audio sources based on their priority. Critical sources like navigation and telephone receive higher priority handling with automatic switching, while less critical sources allow manual selection. This local differentiation of control quality maintains reliability for important functions without uniformly increasing complexity across all sources
Data Source
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AI summary
An audio control system may receive a plurality of audio input signals. A switch or multiplexer may switch one of the plurality of audio input signals from respective audio sources to a power amplifier. A controller in communication with the multiplexer may control switching of the multiplexer. A display may provide the user with information regarding the switching of the audio signal inputs. A user interface may permit the user to manually switch the audio source. A signal detector in communication with an audio input signal may detect a signal from a priority source. When the signal from the priority source is detected, the controller may direct the multiplexer to route the signal from the priority source to the power amplifier.