Audio Data Processing Device Through-Output Noise Reduction
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Solution Overview
Problem
Audio data processing devices with input, through, and output terminals face signal degradation due to switching noise when the power supply is turned OFF, as the input and through terminals must be connected, causing noise in the through output.
Innovation Solution
An audio data processing device design where the signal processor continues to output audio data from the input terminal to the through terminal without processing, even when the power supply is OFF, maintaining the same signal path and preventing switching noise, using a signal processor with a relay circuit that disconnects and reconnects terminals accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the power supply is switched OFF, then power consumption is reduced, but switching noise appears in the through output degrading signal quality
Solution Approach 1:
The signal processor is divided into multiple independent processing units, with the through-output unit remaining active while other processing units are powered down. This segmentation allows selective power consumption reduction without interrupting the through-output signal path, thereby reducing power loss while preventing switching noise in the through output.
2Reliability
If the input terminal and through terminal are connected when power is OFF, then through output is maintained, but switching noise degrades signal quality
Solution Approach 1:
The relay circuit is pre-configured to maintain the connection between the input terminal and through terminal even when the power supply is switched OFF. This preliminary arrangement ensures that the through-output signal path remains intact without requiring switching operations during power transitions, thereby maintaining through output continuity while preventing switching noise degradation.
3Loss of energy
If the signal processor stops operation when power is OFF, then power consumption is reduced, but the through function cannot be maintained
Solution Approach 1:
The signal processor is segmented into independent processing units, allowing the through-output unit to remain operational while other units are powered down. This enables the through function to be maintained with reduced power consumption by selectively activating only the necessary processing component.
Solution Approach 2:
The signal processor is designed with multi-functionality, where the same hardware infrastructure supports both full processing operations and through-output operations. This allows the system to switch between operational modes without requiring separate dedicated circuits, enabling power reduction while maintaining through function continuity.
Data Source
AI summary
There is provided an audio data processing device. The device includes an IN terminal to which first audio data from outside are input, a THRU terminal from which the first audio data are output to the outside, an FPGA which signal-processes the first audio data from the IN terminal, an OUT terminal from which second audio data which are signal-processed are output to the outside, and a power supply switch. The FPGA outputs the first audio data from the IN terminal to the THRU terminal without any processing when the power supply switch is in an ON state and is also supplied with operational power and outputs the first audio data from the IN terminal to the THRU terminal without any processing when the power supply switch is in an OFF state.