Earbud Audio Topology Switching with Low-Latency Link Handover
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Solution Overview
Problem
Existing Bluetooth audio rendering systems face inefficiencies in switching between audio sources due to static audio topologies, leading to increased power consumption, bandwidth usage, and degraded user experience, especially with the introduction of new audio topologies in the Bluetooth Low Energy (BLE) standard.
Innovation Solution
A method for switching between audio sources by maintaining at least one wireless link during the transition from a first audio source to a second audio source, allowing simultaneous connection to both sources for improved user experience and reduced latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the audio rendering system disconnects from the first audio source to connect to the second audio source, then the switching between audio sources is achieved, but the switching time is long and user experience is degraded
Solution Approach 1:
The system performs preliminary actions by maintaining the wireless link with the first audio source in a dormant state while establishing connection with the second audio source. This allows the switching to occur without complete disconnection, significantly reducing switching time and improving user experience
2Loss of time
If the audio rendering system maintains wireless link with the first audio source while switching to the second audio source, then the switching latency is reduced, but the power consumption increases
Solution Approach 1:
The system dynamically manages the wireless link state, transitioning the link with the first audio source to a dormant state during switching while maintaining it available for quick reactivation. This dynamic state management reduces power consumption compared to maintaining full active connection, while still enabling fast switching when needed
3Reliability
If the audio rendering system uses static audio topology configuration, then the system is compliant with Bluetooth standard, but the switching between different audio topologies requires hardware changes and is inefficient
Solution Approach 1:
The system implements dynamic audio topology configuration that allows switching between different Bluetooth audio topologies (sterео, mono, broadcast) without hardware changes. The topology is adapted based on the audio source type and playback requirements, maintaining standard compliance while enabling flexible switching between different audio architectures
Data Source
AI summary
In the present disclosure a method is proposed for switching from a first Bluetooth audio source to a second Bluetooth audio source in a user experience friendly manner, e.g. reducing latency. The method is performed by an audio rendering system comprising a primary wireless speaker and a secondary wireless speaker. The audio rendering system receives a first audio stream from the first audio source by using a first audio topology comprising a first set of wireless links. Upon receiving a request to switch to a second audio stream using a second audio topology, a second set of wireless links is established; and, the reception of the second audio stream starts while maintaining the audio rendering system and the first audio source connected by a wireless link of the first set of wireless links. The wireless speaker(s) can be a wireless earbud, a bookshelf speaker, a floor speaker, an outdoor speaker, a subwoofer, a headset speaker.