Audio Gain Compensation Display for Stable Output Level Control
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Solution Overview
Problem
In audio signal processing systems with automatic compensation functions, users face difficulty in understanding the signal level output to subsequent stages due to insufficient display information, particularly when automatic compensation is on, as the level remains constant irrespective of the analog amplifier's gain, making it hard to comprehend the actual signal level.
Innovation Solution
The system includes a level adjuster with an analog amplifier, AD converter, digital amplifier, and selector, along with a controller that displays the current analog gain value as a target when automatic compensation is on, and adjusts the digital gain to cancel out differences, allowing the selector to choose the digital amplifier's output, and erases the display when compensation is off, selecting the AD converter's output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If automatic compensation is turned on to maintain constant output signal level, then the signal level stability is improved, but the user's ability to comprehend the actual signal level deteriorates due to insufficient display information
Solution Approach 1:
The patent introduces a target gain value as an intermediary indicator that mediates between the analog gain setting and the actual output signal level. When automatic compensation is active, the target gain value serves as a reference point that helps users understand the relationship between their gain adjustments and the compensated output level, bridging the information gap created by the compensation function
Solution Approach 2:
The system implements feedback by displaying the target gain value that reflects the actual output signal level after automatic compensation. This feedback mechanism allows users to see the effective gain being applied to the output signal, enabling them to comprehend the actual signal level despite the automatic compensation process
2Manufacturing precision
If the analog amplifier gain is adjusted to optimize AD converter utilization, then the sound quality is improved, but the signal level at the subsequent stage becomes unpredictable
Solution Approach 1:
The patent provides feedback by displaying the target gain value that represents the actual output signal level after automatic compensation. This allows users to adjust the analog amplifier gain to optimize AD converter utilization while simultaneously monitoring the effective output level through the target gain display, thus maintaining both sound quality and signal level predictability
Data Source
AI summary
While level of the inputted analog signal is adjusted according to a set analog gain value and then analog-digital converted and outputted, when an automatic compensation is on and a difference of the analog gain value and a target value is compensated by level adjustment in a digital amplifier, the analog gain value is displayed by a gain knob, and in response to an operation to turn on the automatic compensation, a present value of the analog gain value at that time is displayed as a target gain value by a mark near the analog gain value, and in response to an operation to turn off the automatic compensation, display of the target gain value is erased.