Volume-Based Dynamic Range Mapping for Sound Output
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Solution Overview
Problem
Current sound output technologies fail to optimize the dynamic range of audio content based on user auditory characteristics and volume settings, leading to suboptimal listening experiences.
Innovation Solution
A sound output apparatus and signal processing method that adjust the dynamic range of sound signals based on user-specific auditory characteristics and volume settings, using mapping information to process sound signals and adjust magnitudes for different frequencies, incorporating psychoacoustic models and user-customized settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed dynamic range is used for all volume settings, then the system is simple to implement, but the sound quality does not adapt to different listening conditions and user preferences
Solution Approach 1:
The patent implements dynamic adjustment of the dynamic range based on the current volume setting. The processor dynamically selects from multiple pre-stored dynamic range values corresponding to different volume levels, allowing the system to adapt to changing listening conditions without requiring complex real-time calculations.
Solution Approach 2:
The patent changes the dynamic range parameter according to the volume setting. By storing multiple dynamic range values and selecting the appropriate one based on the current volume level, the system achieves adaptability while maintaining implementation simplicity through pre-computed parameter sets.
2Manufacturing precision
If the dynamic range is adjusted based on volume settings and user characteristics, then the listening experience is optimized, but the processing complexity increases
Solution Approach 1:
The patent performs preliminary preparation by storing multiple dynamic range values corresponding to different volume settings before actual playback. This pre-computation approach allows the processor to simply select from pre-prepared options during playback, reducing real-time processing complexity while maintaining optimized sound quality.
Solution Approach 2:
The patent replaces complex real-time auditory analysis with a simpler lookup-based system. Instead of performing complex real-time analysis of user characteristics and sound signals, the system uses pre-stored mapping information between volume settings and dynamic ranges, substituting mechanical/algorithmic complexity with data-driven selection.
3Measurement precision
If the dynamic range is reduced for lower volume settings, then audible details are preserved, but the overall sound output level decreases
Solution Approach 1:
The patent applies different dynamic range values to different volume settings, creating local optimization for each listening condition. By matching the dynamic range to the specific volume level, the system preserves audible details at lower volumes without unnecessarily reducing output level at higher volumes, achieving context-appropriate quality.
Data Source
AI summary
A sound output apparatus is provided. The sound output apparatus according to an embodiment includes an inputter, an outputter, a storage configured to store mapping information between a volume level and a dynamic range of the sound output apparatus and a processor configured to obtain a dynamic range corresponding to a volume level currently set to the sound output apparatus based on the mapping information, process a sound signal input through the inputter based on the dynamic range and output the processed sound signal through the outputter.