Modular Vehicle Audio Amplifier With DSP for OEM Head Unit Retention
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Solution Overview
Problem
Existing vehicle sound systems face challenges in upgrading audio performance without altering the OEM head unit, as OEM amplifiers have fixed equalization settings that cannot be changed, leading to underutilization of aftermarket speakers, and existing solutions involving separate CAN audio interfaces, DSPs, and multiple power amplifiers result in expensive and cumbersome systems.
Innovation Solution
A modular vehicle sound system that combines a vehicle data bus interface, digital signal processor, and amplifier, allowing for plug-in module upgrades and wireless control, enabling customizable equalization and gain settings without the need for separate components, and can be integrated with aftermarket head units or smartphones for advanced functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate CAN audio interface, DSP, and multiple power amplifiers are used to achieve customizable equalization and gain settings, then audio performance and customization capability are improved, but system cost and installation complexity increase significantly
Solution Approach 1:
The patent combines the CAN audio interface, DSP processor, and power amplifier into a single integrated modular unit. This consolidation maintains full customization capability for equalization and gain settings while eliminating the need for multiple separate components, thereby reducing installation complexity and system cost without sacrificing adaptability
Solution Approach 2:
The integrated modular amplifier is designed to perform multiple functions simultaneously: it serves as a CAN bus interface for communication, a DSP processor for signal processing and equalization, and a power amplifier for audio output. This multi-functionality allows a single device to replace what previously required three separate components, reducing overall system complexity while maintaining full customization capability
2Device complexity
If OEM amplifier fixed equalization settings are used, then system simplicity is maintained, but aftermarket speaker performance is underutilized
Solution Approach 1:
The patent implements dynamically adjustable equalization and gain settings through the integrated DSP processor, allowing the amplifier to adapt its characteristics in real-time. This enables the system to optimize performance for different aftermarket speaker configurations while maintaining a simple single-unit structure, thereby resolving the contradiction between simplicity and adaptability
3Adaptability or versatility
If the OEM head unit is replaced to achieve advanced audio processing, then audio performance is improved, but the OEM head unit appearance and integration are lost
Solution Approach 1:
The patent extracts the advanced audio processing functionality from the head unit and places it in a separate integrated modular amplifier. This allows the OEM head unit to remain in place, preserving its appearance and dashboard integration, while the standalone amplifier provides advanced equalization, gain control, and DSP capabilities through the CAN bus interface
Data Source
AI summary
A modular vehicle sound system that can be upgraded or reconfigured by changing a plug-in module. In the advanced-capability embodiments the invention combines the functions of a vehicle data bus interface, a digital signal processor, and an amplifier. In the advanced-capability embodiments the invention provides a wireless interface with a separate digital device that can be used to control the inventive amplifier.