Adaptive Loudspeaker Array Control for Multi-User Sound Quality
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Solution Overview
Problem
Existing sound field control audio reproduction devices provide a mediocre listening experience for additional users beyond their designed capacity, failing to adapt to multi-user scenarios with homogeneous sound quality.
Innovation Solution
A sound reproduction device equipped with a user detection-and-tracking system dynamically adjusts digital signal processing (DSP) modes based on the number and position of users within its operational range, employing algorithms like cross-talk cancellation and object-based surround sound to optimize audio output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a sound reproduction device is designed for a specific number of users, then it can provide optimized sound quality for that number of users, but it provides mediocre listening experience for additional users beyond its designed capacity
Solution Approach 1:
The system dynamically switches between different DSP modes based on the detected number of users. When one user is detected, the first DSP mode is applied; when multiple users are detected, the second DSP mode is applied. This dynamic adaptation allows the system to maintain optimized sound quality for varying user configurations rather than being fixed for a single user count.
Solution Approach 2:
The system changes key DSP parameters including the impulse response function, transfer function, and filter coefficients based on the number of users detected. By modifying these parameters dynamically, the system adapts its audio processing characteristics to match the current user scenario, thereby maintaining high sound quality whether one user or multiple users are present.
2Stability of the object's composition
If the system uses fixed DSP modes, then it can maintain consistent processing, but it cannot adapt to changing user positions and numbers in real-time
Solution Approach 1:
The system continuously detects the number and positions of users in real-time and uses this feedback to dynamically select and switch between different DSP modes. This closed-loop feedback mechanism ensures that the DSP processing consistently adapts to the current user configuration, maintaining both stability in processing quality and adaptability to changing conditions.
Solution Approach 2:
The system transitions from static, fixed DSP modes to dynamic, user-adaptive DSP modes. The DSP configuration changes in real-time based on user detection, allowing the system to maintain consistent optimized processing for whatever user scenario is currently present while adapting to changes as users move or are added/removed.
3Adaptability or versatility
If the system employs multiple DSP modes for different user scenarios, then it can provide optimized audio for various configurations, but it increases system complexity
Solution Approach 1:
The system segments the audio processing into distinct DSP modes, each optimized for specific user scenarios (single user vs. multiple users). By dividing the processing into separate, dedicated modes rather than using a single complex adaptive algorithm, the system manages complexity through modular design while maintaining high adaptability across different user configurations.
Data Source
AI summary
There is provided a computer-implemented method of generating audio signals for an array of loudspeakers positioned in a listening environment, the method comprising: receiving at least one input audio signal; determining at least one of: a number of users in the listening environment, or a respective position of each of one or more users in the listening environment; based on the at least one of the number of users or the respective position of each of the one or more users in the listening environment, selecting a sound reproduction mode from a set of predetermined sound reproduction modes of the array of loudspeakers, wherein the set of predetermined sound reproduction modes comprises one or more user-position-independent modes and one or more user-position-dependent modes; and generating a respective output audio signal for each of the loudspeakers in the array of loudspeakers based on at least a portion of the at least one input audio signal, wherein the output audio signals are generated according to the selected sound reproduction mode.