Stateless Playback Coordination for Synchronized Collaborative Media
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Solution Overview
Problem
Existing technologies fail to effectively replicate the social aspect of music consumption, lack flexibility and spontaneity, and are limited in scalability during collaborative media consumption sessions.
Innovation Solution
A stateless playback architecture that computes and synchronizes playback positions across multiple devices using a stateless position coordinator, allowing independent control and seamless synchronization without storing session states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a central server stores references to all devices in a session to coordinate playback, then playback synchronization is achieved, but storage requirements increase substantially when scaling to larger numbers of users
Solution Approach 1:
The patent extracts the session state storage from the central server architecture. Instead of the server storing device references and session states, each client device independently maintains its own session state locally. This eliminates the need for substantial centralized storage while preserving playback synchronization through peer-to-peer state exchange.
Solution Approach 2:
Each client device independently computes playback positions and maintains session state without relying on the server for state storage. The server only facilitates coordination when needed, allowing each device to serve itself for state management, thereby reducing centralized storage requirements while maintaining synchronization.
2Ease of manufacture
If scheduled streams with upfront preparation are used, then content delivery is organized, but flexibility and spontaneity are reduced
Solution Approach 1:
The system transitions from static scheduled streams to dynamic on-demand playback. Users can initiate, pause, resume, and control playback at any time without being constrained by predetermined schedules. The playback position is computed dynamically based on user actions and device state, enabling flexible and spontaneous media consumption while maintaining organized content delivery.
3Reliability
If all participating devices play the same content at the same playback position, then synchronized playback is achieved, but independent control is limited
Solution Approach 1:
The patent segments the playback control architecture into independent client devices, each capable of autonomous control decisions. Instead of a centralized system dictating playback position to all devices, each device independently computes its playback position based on local session state and user interactions, while still achieving synchronized playback through state coordination.
Solution Approach 2:
The system implements feedback mechanisms where each device reports its playback state and receives updates about session state from other devices. This feedback loop enables each device to adjust its playback position independently while maintaining synchronization with the overall session, balancing independent control with coordinated playback.
Data Source
AI summary
Stateless playback is performed by receiving a playback control instruction request from a first media playback device, the playback control instruction request requesting a playback position associated with a collaborative media consumption session to move. Upon receiving the playback control instruction request, updating a playback context. Upon receiving a request for playback instructions, an updated playback position for the collaborative media consumption session is computed. The updated playback position is then communicated to the media playback device.