Multi-Device Gain Alignment Using Frame-Synced Attenuation
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Solution Overview
Problem
In multi-channel audio systems, existing technologies fail to align and synchronize gains across devices, leading to latency and performance degradation due to unsynchronized application of limiter and brownout gains.
Innovation Solution
A method and system where devices receive and broadcast limiter and brownout gain attenuations, determine local attenuations based on supply voltage and signal amplitude, and apply a total attenuation synchronously using a frame synchronization signal to align amplification gains across interconnected devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If devices apply limiter and brownout gains independently without synchronization, then each device can respond quickly to local conditions, but gain misalignment and latency occur across the multi-channel system
Solution Approach 1:
Devices broadcast their local gain requirements (limiter and brownout attenuations) in advance through TDM slots before the actual gain adjustment is needed. This preliminary exchange of information allows all devices to compute the maximum attenuation values ahead of time, so when the frame synchronization signal arrives, all devices can apply gains simultaneously without waiting for individual responses.
Solution Approach 2:
Each device monitors and broadcasts its local gain requirements to other devices in the system. This feedback mechanism ensures that all devices are aware of the gain adjustments being made elsewhere, enabling coordinated synchronous adjustment across the entire multi-channel system while maintaining responsiveness to local conditions.
2Ease of operation
If devices adjust amplification gains without synchronized timing, then device operation remains simple and independent, but signal distortion and performance degradation occur
Solution Approach 1:
A frame synchronization signal acts as an intermediary timing reference that coordinates gain adjustments across all devices. This single synchronization mechanism maintains device operational simplicity while ensuring that all amplification gain adjustments occur simultaneously, preventing signal distortion and maintaining high system performance.
3Measurement precision
If devices broadcast gain attenuations continuously, then real-time gain alignment is achieved, but communication bandwidth and processing overhead increase
Solution Approach 1:
Devices broadcast their gain attenuations periodically in TDM slots rather than continuously. This periodic approach maintains real-time gain alignment accuracy by updating values at appropriate intervals while significantly reducing communication bandwidth requirements and processing overhead compared to continuous broadcasting.
Data Source
AI summary
Methods and systems for aligning amplification gains in a plurality of interconnected devices are disclosed. The method includes receiving by each device limiter gain attenuations and brownout gain attenuations broadcasted by the plurality of devices and selecting the maximum brownout gain attenuation and the maximum limiter gain attenuation. The method includes determining a total attenuation as a sum of the maximum brownout attenuation gain and the maximum limiter attenuation gain. The method includes receiving a frame synchronization signal and adjusting the amplification gain by applying the total attenuation responsive to the frame synchronization signal.