Playback Device Localization Using Wireless Signal Patterns
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Solution Overview
Problem
Conventional methods for locating and managing playback devices in indoor environments are often inaccurate, require tedious calibration, and struggle to adapt to changing device positions and user preferences, leading to suboptimal audio experiences and device interactions.
Innovation Solution
A system that measures and normalizes wireless signals between devices to estimate the likelihood of a portable device's location relative to reference devices, adjusts audio settings based on space state, and trains a target device prediction model to enhance user interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods are used for locating playback devices, then device localization can be achieved, but the accuracy is insufficient and requires tedious calibration
Solution Approach 1:
The system performs self-localization by automatically measuring wireless signal patterns between devices and determining relative positions without requiring external calibration equipment or manual calibration procedures. The playback devices autonomously exchange signal strength data and compute their spatial relationships, eliminating the need for user-initiated calibration while achieving accurate localization.
Solution Approach 2:
The patent replaces traditional mechanical or manual calibration methods with wireless signal-based measurement. By using wireless signal patterns (electromagnetic field interactions) to determine device positions, the system eliminates physical calibration processes and achieves localization through automated signal exchange and pattern analysis between playback devices.
2Adaptability or versatility
If conventional methods are used for managing playback devices, then basic device control is possible, but the system cannot adapt to changing device positions and user preferences
Solution Approach 1:
The system dynamically adjusts audio parameters and device management settings based on real-time changes in device positions detected through wireless signal pattern analysis. As playback devices move or users change preferences, the system continuously updates its understanding of spatial relationships and adapts audio delivery accordingly, maintaining optimal audio experience quality without requiring manual reconfiguration.
Solution Approach 2:
The patent implements feedback mechanisms where the system continuously monitors wireless signal patterns, determines device positions and user preferences, and uses this information to adjust audio parameters and device behavior. This closed-loop feedback ensures the system adapts to changing conditions while maintaining reliable audio quality, as the system learns from and responds to actual usage patterns.
3Manufacturing precision
If manual calibration is performed, then device positioning can be established, but the process is time-consuming and tedious
Solution Approach 1:
The system performs preliminary localization by automatically measuring and storing wireless signal patterns between devices during normal operation. Instead of requiring calibration at setup time, the system continuously gathers spatial information in advance through automated signal exchange, so that when positioning is needed, the data is already available, eliminating time-consuming calibration procedures while maintaining precision.
Data Source
AI summary
Systems and methods for managing playback devices in accordance with embodiments of the invention are illustrated. One embodiment includes a method for modifying a system that includes several devices. The method includes steps for measuring a first signal pattern for wireless signals between the several devices, measuring a second signal pattern for the wireless signals after measuring the first signal pattern between the several devices, determining an updated state of the system based on a difference between the second signal pattern and the first signal pattern, and modifying state variables of one or more devices of the playback system based on the determined updated state.