Audio Processor Dynamic Loudspeaker Allocation for Listener Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional audio reproduction systems with loudspeakers typically provide optimal sound only within a limited range of listener positions, known as the 'sweet spot area', and struggle to adapt sound distribution in multi-room playback systems.
Innovation Solution
An audio processor that dynamically allocates loudspeakers based on the listener's position and the positions of multiple loudspeakers, rendering sound signals in real-time to ensure that the sound follows the listener, even when moving between different rooms or loudspeaker setups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional loudspeaker reproduction systems are used, then optimal sound quality is achieved within the sweet spot area, but the audio experience deteriorates when the listener moves outside this limited area
Solution Approach 1:
The system dynamically tracks the listener's position using sensors (accelerometer, gyroscope, magnetometer) and continuously adapts the audio rendering parameters based on the detected position and orientation. This dynamic adjustment ensures optimal sound quality regardless of the listener's movement within the room, resolving the contradiction between maintaining reliable sound quality and adapting to varying listener positions.
Solution Approach 2:
The system implements feedback by continuously monitoring the listener's position through motion sensors and using this information to adjust the audio output in real-time. The feedback loop processes sensor data, determines the listener's spatial coordinates, and modifies the loudspeaker signal accordingly, thereby maintaining sound quality across different positions and resolving the adaptability issue.
2Reliability
If the audio system is designed for a fixed loudspeaker setup, then optimal reproduction is achieved within that specific layout, but the system cannot adapt when listeners move between different rooms or setups
Solution Approach 1:
The audio processing system is designed to be universal by implementing a coordinate-based rendering approach that works across different loudspeaker configurations and room layouts. The system can adapt to various setups (stereo, surround, multi-room) using the same core technology, allowing listeners to move between different rooms and setups while maintaining audio reproduction quality.
Solution Approach 2:
The system changes rendering parameters based on the detected listener position and the identified loudspeaker setup. By dynamically adjusting parameters such as pan laws, distance attenuation, and spatialization algorithms according to the listener's location and the specific loudspeaker configuration, the system maintains reliable audio reproduction across multiple rooms and different setups.
3Adaptability or versatility
If traditional audio rendering methods are used, then the system remains simple in structure, but it cannot provide adaptive sound following when the listener moves
Solution Approach 1:
The system introduces an intermediary component - a motion sensor module (accelerometer, gyroscope, magnetometer) - that captures listener movement data. This intermediary provides the necessary positional information to the audio processor without requiring complex direct tracking mechanisms, thereby enabling sound following capability while keeping the overall system complexity manageable.
Solution Approach 2:
The system replaces complex mechanical tracking systems with electronic sensor-based detection. Instead of using mechanical devices to track listener position, the system uses electronic sensors (accelerometer, gyroscope, magnetometer) to detect motion and calculate position, significantly reducing mechanical complexity while enabling adaptive sound following.
Data Source
AI summary
An audio processor for providing a plurality of loudspeaker signals, or loudspeaker feeds, on the basis of a plurality of input signals, like channeled signals and/or object signals, is configured to obtain information about the position of a listener, to obtain an information about the position of a plurality of loudspeakers, or sound transducers, which may be placed within the same containment, e.g. a soundbar, to dynamically adapt an allocation of objects and/or channel objects and/or adapted signals, like adapted channel signals, derived from the input signals, like channel signals or channel objects, or like upmixed or downmixed signals, to loudspeakers, and to render the objects and/or the channel objects and/or the adapted signals derived from the input signals, in dependence on the information about the positions of the listener and of the loudspeakers, and on the allocation, in order to obtain the loudspeaker signals, such that a rendered sound follows a listener.