UPnP Scene Composition for Selective AV Playback
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Solution Overview
Problem
Conventional UPnP systems cannot selectively play back user-desired scenes from multiple AV content items, limiting user control over content playback.
Innovation Solution
A method and apparatus that allow a control point to request and compose scenes from a media server, determine playable protocols and formats with a media renderer, and control the media renderer to play back the composed scene, enabling user-defined scene playback and recomposition of scene groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional UPnP systems are used for AV content playback, then basic content playback is supported, but users cannot selectively play back desired scenes from multiple content items
Solution Approach 1:
The patent segments AV content into discrete scene units that can be independently selected and played back. Each scene is identified by a scene ID and associated with a content URI, allowing users to select specific scenes rather than playing entire content items. This segmentation enables fine-grained control over playback content while maintaining system manageability through structured scene identification and selection interfaces.
2Adaptability or versatility
If users want to recompose scene groups from multiple content items, then playback flexibility is improved, but control and coordination complexity increases
Solution Approach 1:
The patent introduces a scene selection interface and scene group composition mechanism that acts as an intermediary between users and the underlying UPnP playback system. This intermediary layer provides structured tools for selecting scenes from multiple content items and composing them into scene groups, while automatically handling the coordination and control logic required for seamless playback transitions between scenes from different sources.
3Stability of the object's composition
If multiple content items are integrated into unified scene groups, then playback continuity is improved, but protocol and format compatibility challenges arise
Solution Approach 1:
The patent employs parameter-based scene identification and protocol adaptation mechanisms. Each scene is characterized by parameters including scene ID, content URI, and protocol/format information. The system adapts to different protocols and formats by adjusting playback parameters dynamically, allowing seamless integration of scenes from multiple content items with different protocols while maintaining playback continuity through unified scene group management.
Data Source
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AI summary
A method and apparatus for playing back a scene using Universal Plug and Play (UPnP). A control point sends a request for a scene to be played back to a media server that stores Audio/Video (AV) content and receives the scene to be played back from the media server in response to the request. The control point receives information about supportable protocol and file format from a media renderer that will play back content, and determines a content resource, a protocol and a file format to be used for playback based on the information. The control point composes a scene to be played back based on the received scenes. The media renderer plays back the composed scene.