Sound Processing Device Distance-Adaptive Stereo Effect
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Solution Overview
Problem
In Internet broadcasting of sporting events, the reproduction of audio signals collected in various environments is challenging due to the mismatch between the distance of stereo microphones and speakers, leading to impaired sound reproduction in both mobile and home settings.
Innovation Solution
A sound processing device that adjusts the stereo effect of stereophonic audio signals based on the distances between stereo microphones and speakers, using signal processing units to attenuate or amplify crosstalk components depending on the ratio of these distances to enhance realistic sound reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the audio signal is reproduced using standard stereophonic processing, then the reproduction is simple and compatible with various devices, but the sound reproduction becomes unrealistic due to mismatch between microphone distance and speaker distance
Solution Approach 1:
The patent changes the parameter of stereo signal processing by introducing distance-based processing. It calculates processing parameters based on the first distance (microphone spacing) and second distance (speaker spacing), and applies different processing strengths according to the ratio between these distances. This transforms the fixed stereo processing into a dynamic, distance-adaptive process that maintains realism across different playback environments.
Solution Approach 2:
The patent makes the stereo processing dynamic by adjusting the processing strength based on the ratio of microphone distance to speaker distance. When the ratio is large (microphones farther apart than speakers), stronger processing is applied; when the ratio is small, weaker processing is applied. This dynamic adaptation allows the system to maintain realistic sound reproduction across various playback configurations without requiring manual intervention.
2Reliability
If the stereo effect is enhanced to improve sound realism, then the listening experience improves, but the processing becomes more complex and may not suit all reproduction environments
Solution Approach 1:
The patent uses parameter changes to achieve both high quality and adaptability. By calculating the ratio between the first distance (microphone spacing) and second distance (speaker spacing), the system automatically adjusts the processing parameters to match the reproduction environment. This ensures optimal sound quality for each specific configuration without requiring multiple different processing modes or manual setup.
Solution Approach 2:
The system performs self-service by automatically determining the appropriate processing strength based on the distance ratio between microphones and speakers. It does not require external input about the reproduction environment or manual configuration - the processing parameters are self-adjusted based on the physical distances involved, making the system both high-quality and highly adaptable.
3Reliability
If distance-based processing is applied to all stereophonic signals, then realistic sound reproduction is achieved, but the processing time and computational load increase
Solution Approach 1:
The patent minimizes processing time by using a simple distance ratio calculation to determine processing parameters. Instead of complex real-time analysis, it uses the known first distance and second distance to compute a ratio, then applies the corresponding processing strength. This approach achieves realistic sound reproduction with minimal computational overhead and processing delay.
Data Source
AI summary
A sound processing device includes: a distance information obtaining unit which obtains information about a first distance between stereo microphones and information about a second distance between stereo loudspeakers; and a signal processing unit which processes a stereophonic audio signal collected by the stereo microphones according to the first distance and the second distance to adjust a stereo effect provided when the stereophonic audio signal is reproduced from the stereo loudspeakers.