Audio Channel Equalization for User-Tuned Balance Correction
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Solution Overview
Problem
Audio playing systems, such as earphones and loudspeakers, often have unbalanced channel characteristics due to manufacturing limitations and individual ear sensitivities, leading to suboptimal audio experiences.
Innovation Solution
An audio playing system comprising a first channel output device, a first equalizer, and a controller that adjusts frequency response parameters based on user feedback from test audio signals to compensate for channel and ear differences, ensuring balanced audio output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If test audio signals are played through the output device to measure user ear response, then the system can obtain accurate frequency response characteristics and compensate for channel and ear differences, but the user experience is interrupted by requiring confirmation inputs during the testing process
Solution Approach 1:
The system implements feedback by playing test audio signals through the output device and receiving confirmation inputs from the user to generate user parameters. The controller uses this feedback loop to measure the user's ear response characteristics and adjust the frequency response accordingly, resolving the contradiction between measurement accuracy and operational continuity.
2Reliability
If the system adjusts frequency response parameters to compensate for channel and ear differences, then audio balance and quality are improved, but the system complexity increases due to multiple equalizers and controllers
Solution Approach 1:
The controller serves multiple functions: it manages both equalizers, coordinates the test mode operation, processes user inputs, and performs frequency response adjustments. This multi-functionality allows the system to achieve reliable audio balance without proportionally increasing complexity, as one controller handles tasks that could otherwise require multiple dedicated components.
Solution Approach 2:
The audio processing system is segmented into separate functional modules: first and second equalizers for independent channel adjustment, and a controller for coordinated management. This segmentation allows each component to focus on specific tasks, improving overall system reliability while maintaining manageable complexity through modular design.
3Measurement precision
If manual confirmation inputs are required during test mode to generate user parameters, then the system can accurately capture user preferences, but the testing process becomes time-consuming and tedious
Solution Approach 1:
The system uses feedback from user confirmation inputs during test mode to generate accurate user parameters that reflect individual ear characteristics and preferences. While this feedback mechanism ensures measurement precision, the patent acknowledges the time loss and provides options to minimize it, such as allowing users to skip certain tests or use default settings.
Data Source
AI summary
An audio playing system has a first channel output device, a first equalizer and a controller. The first equalizer is electrically coupled to the first channel output device and having a set of first parameters of frequency response, the first equalizer configured to adjust a first channel audio signal with the set of first parameters of frequency response and output the adjusted first channel audio signal to the first channel output device. The controller is electrically coupled to the first channel output device and the first equalizer, wherein in a test mode, the controller is configured to send a set of test audio signals to the first channel output device, to generate a set of first user parameters based on a plurality of pieces of first confirmation signal, and to adjust the set of first parameters of frequency response based on the set of first user parameters.