Spatial Mapping for Media Playback Device Positioning
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Solution Overview
Problem
Existing media playback systems face challenges in determining the spatial orientation and configuration of multiple playback devices within an environment, especially with portable devices that change location dynamically, limiting the optimization of audio settings and user experience.
Innovation Solution
A spatial mapping system that constructs, maintains, and updates a map of device positions using localization signals, allowing devices to transmit and receive data to coordinate and adjust settings for improved performance and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If devices are allowed to be portable and dynamically relocate, then device mobility and user flexibility are improved, but the ability to determine spatial orientation and configuration deteriorates
Solution Approach 1:
The system continuously receives localization signals from multiple playback devices and dynamically updates spatial maps based on this feedback. The controller device uses this ongoing feedback to track device movements and adjust spatial configuration accordingly, resolving the contradiction between device mobility and spatial orientation determination.
Solution Approach 2:
The system performs preliminary spatial mapping by receiving localization signals and constructing spatial maps before audio playback begins. This preliminary action establishes the initial spatial configuration of devices, enabling the system to subsequently optimize audio settings based on known device positions even as devices move.
2Reliability
If spatial mapping is implemented to optimize audio settings, then audio performance is improved, but system complexity increases
Solution Approach 1:
The system divides the spatial mapping functionality into separate components: playback devices generate localization signals, controller devices receive and process these signals, and spatial maps are constructed and maintained as separate data structures. This segmentation allows each component to focus on a specific task, improving audio performance while managing system complexity through modular architecture.
Solution Approach 2:
The spatial map acts as an intermediary data structure between the raw localization signals from devices and the audio settings that need optimization. The controller device uses this intermediate spatial representation to determine optimal audio configurations without directly processing complex device position data, thereby improving performance while reducing computational complexity.
3Measurement precision
If continuous spatial map updates are performed, then device positioning accuracy is improved, but computational energy consumption increases
Solution Approach 1:
The system performs spatial map updates periodically based on received localization signals rather than continuously processing every possible data point. The controller device updates the spatial map at intervals when new localization information is available, maintaining positioning accuracy while reducing computational energy consumption compared to continuous real-time processing.
Data Source
AI summary
Spatial maps can be constructed that represent the relative positions of media playback system components within an environment. In one method, an orchestrator device transmits an instruction to a plurality of playback devices to initiate a localization session. After receiving the instruction, a first playback device transmits a localization signal which is received by the second playback device. Based on the localization signal, a spatial measurement parameter is obtained. The spatial measurement parameter is transmitted to a mapper device, which then constructs a spatial map of the environment including at least the first playback device and the second playback device.