Speaker-Specific Audio Filtering Across Volume Levels
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Solution Overview
Problem
Existing audio signal processing methods for display devices do not account for the diverse speaker specifications, leading to sound quality distortion in low-performance speakers and underutilization of high-performance speakers.
Innovation Solution
An electronic device that stores filter information for each speaker characteristic and volume level, allowing it to set filters based on speaker characteristics for optimized signal processing, and selectively applies signal processing based on volume levels to prevent distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If signal processing is performed using a uniform DSP method for all speaker models, then the processing complexity is reduced, but sound quality distortion occurs in low-performance speakers and speaker performance cannot be fully utilized in high-performance speakers
Solution Approach 1:
The patent applies parameter changes by storing multiple filter information sets with different characteristics (low-cut shelving filter parameters, block frequencies, benefit values) in a lookup table, and dynamically selecting appropriate filter parameters based on speaker characteristic values and volume levels. This allows the system to adapt signal processing parameters to match different speaker performance levels without increasing processing complexity.
Solution Approach 2:
The patent implements preliminary action by pre-calculating and storing optimized filter information for various speaker characteristic values and volume levels in a lookup table before runtime. During operation, the system simply retrieves the appropriate pre-computed filter parameters based on matching speaker characteristics, eliminating the need for real-time complex calculations and enabling rapid adaptation to different speaker models.
2Reliability
If signal processing is applied to prevent distortion in low-performance speakers, then sound quality is improved, but the speaker performance cannot be fully exerted in high-performance speakers
Solution Approach 1:
The patent applies local quality by tailoring filter characteristics to specific speaker types. Low-performance speakers receive aggressive low-cut filtering to prevent distortion, while high-performance speakers use minimal or no filtering to preserve full frequency range and performance capability. Each speaker model receives customized processing parameters matched to its specific characteristics.
Solution Approach 2:
The patent implements dynamics by making filter parameters variable based on both speaker characteristic values and volume levels. The system dynamically adjusts filtering strength according to operating conditions, applying stronger filtering at higher volumes where distortion is more likely, and weaker or no filtering at lower volumes or with high-performance speakers.
3Reliability
If filter processing is applied at high volume levels, then distortion is prevented, but the audio signal quality may be degraded at low volume levels
Solution Approach 1:
The patent applies dynamics by implementing volume-level-dependent filter selection. The system retrieves different filter information from the lookup table based on the current volume level, applying stronger filtering parameters at high volumes where distortion risk is greater, and weaker or no filtering at low volumes where signal quality preservation is prioritized. This dynamic adaptation optimizes both distortion prevention and audio quality across different operating conditions.
Data Source
AI summary
Disclosed is an electronic device. The electronic device comprises: a speaker; a memory in which filter information for each of a plurality of volume levels is stored for each of characteristic values of a plurality of speakers; and at least one processor, comprising processing circuitry, individually and/or collectively, configured to: obtain filter information for each of the plurality of volume levels corresponding to the characteristic values of the speaker among stored filter information based on characteristic values of the speaker, set a filter based on filter information corresponding to a volume level of the electronic device among the obtained filter information, perform signal processing on an audio signal using the set filter, and control the speaker to output the processed audio signal.