Loudspeaker Control with User-Adaptive DSP Modes
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Solution Overview
Problem
Existing sound field control audio reproduction devices struggle to provide a homogeneous listening experience for multiple users, as they typically excel for the number and positions they are designed for, but offer mediocre performance for additional users.
Innovation Solution
A sound reproduction device equipped with a user detection-and-tracking system adjusts its digital signal processing (DSP) modes in real-time based on the number and position of users within its operational range, employing algorithms like cross-talk cancellation, object-based surround sound, and personal audio zones to optimize sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a sound reproduction device is designed for a specific number and position of users, then it provides excellent sound quality for that configuration, but it offers mediocre performance for additional or differently positioned users
Solution Approach 1:
The system dynamically adjusts its operational state and DSP modes in real-time based on the detected number and positions of users. The user detection-and-tracking system continuously monitors user configuration and triggers appropriate state changes, allowing the sound reproduction device to adapt its signal processing parameters dynamically rather than being fixed for a specific configuration
Solution Approach 2:
The system changes key operational parameters including DSP mode selection, operational state transitions, and signal processing configurations based on detected user configurations. Different operational states correspond to different parameter sets optimized for specific user scenarios (e.g., single user, multiple users, different positioning arrangements), allowing the system to maintain high sound quality across varying conditions
2Adaptability or versatility
If the system uses multiple DSP modes for different user configurations, then it improves adaptability to various user scenarios, but it increases system complexity
Solution Approach 1:
The system segments its operational capabilities into distinct operational states, each optimized for specific user configurations. Rather than implementing a single complex adaptive algorithm, the system divides functionality into manageable state categories (e.g., single-user mode, multi-user mode, different spatial arrangements), making the overall system more tractable while maintaining versatility
Solution Approach 2:
The user detection-and-tracking system provides continuous feedback about user configuration to the control logic, which automatically selects appropriate operational states and DSP modes. This feedback mechanism enables automatic adaptation without requiring complex manual configuration or user intervention, managing system complexity through intelligent control
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.