Cross-Platform Playback Handoff With Session State Continuity
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Solution Overview
Problem
Existing media playback systems lack seamless interoperability between different platforms, requiring users to manually stop and recreate playback sessions when transitioning between devices from one domain to another, which is inconvenient and cumbersome, especially when dealing with playlists and play positions.
Innovation Solution
Automating the playback session transition process by querying the current state of the source domain, detecting trigger conditions such as location changes or device proximity, and sending instructions to initiate the playback session on the target domain with the correct audio content and play position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual stopping and recreation of playback sessions is used when transitioning between devices from different domains, then playback continuity is lost, but system complexity and user effort are reduced
Solution Approach 1:
The patent introduces a session manager as an intermediary component that coordinates between different playback domains (source and target). This session manager automatically handles the complex process of stopping playback on the source device, creating a new session on the target device, and transferring playback state, thereby maintaining continuity without requiring direct user intervention in the complex transfer process
Solution Approach 2:
The system performs preliminary actions by pre-establishing session templates and playback state information before the actual transition occurs. The source device prepares playback state data (including play position, playlist information, and audio content metadata) in advance, enabling the target device to seamlessly continue playback without manual user configuration
2Ease of operation
If automated playback session transition is implemented across different platforms, then user convenience is enhanced, but device complexity increases
Solution Approach 1:
The automated transition system is segmented into distinct functional modules: a session manager on the source device, a session manager on the target device, and communication protocols for data exchange. This segmentation allows each component to handle specific tasks independently, reducing the perceived complexity for users while maintaining automated functionality across the distributed system
Solution Approach 2:
The patent implements universal session management capabilities that work across multiple platforms and device types. The session manager is designed to handle various playback scenarios (single device, multi-device synchronization, different audio sources) through a unified interface, thereby enhancing user convenience without proportionally increasing complexity through standardized multi-functional design
3Reliability
If playback state information is transferred between domains, then playback position and playlist continuity are maintained, but data transmission requirements increase
Solution Approach 1:
The system extracts only the essential playback state information needed for continuity (play position timestamp, playlist identifier, current track metadata) from the complete playback context. By taking out only the critical data elements rather than transferring entire audio files or complete playback histories, the system maintains playback position continuity while minimizing data transmission requirements
Data Source
AI summary
As noted above, example techniques relate to playback transitions between platforms. In an example implementation, while a first playback device is playing back audio content during a first playback session in a first domain, a mobile device detecting a first event configured as a trigger to transfer playback to a second domain on a second playback device. In response to detecting the first event, the mobile device determining playback information for the playback session and sends, via a network interface, instructions to initiate a playback session in the second domain to reproduce the first playback session in the first domain.