Mosaic Service Delivery via Media Presentation Description File
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Solution Overview
Problem
Current mosaic service implementations require significant computational resources for a mosaic server to combine data from multiple channels, limiting efficiency and flexibility in presenting mosaic media on digital televisions and IPTV systems.
Innovation Solution
A method and apparatus that utilize a media presentation description file (MPD) to describe presentation locations and media for logical presentation cells, allowing a DASH client to obtain and present mosaic media directly from an MBMS client, reducing the need for the mosaic server to combine media and enhancing flexibility in content adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the mosaic server combines data from multiple channels into one bitstream, then the mosaic service can be implemented, but the computational load on the server increases significantly
Solution Approach 1:
The patent segments the mosaic service into separate logical presentation cells, each with its own media representation. Instead of combining all channel data at the server, each cell independently manages its media stream, reducing the server's computational burden while maintaining mosaic functionality.
Solution Approach 2:
The patent introduces an intermediary structure (media presentation description file with logical presentation cell descriptions) that mediates between the server and client. This intermediary enables the server to simply provide media to cells without performing complex combination operations, while the client handles the mosaic assembly.
2Ease of manufacture
If the mosaic server combines multiple channel data, then the mosaic service function is achieved, but the flexibility in content adjustment is reduced
Solution Approach 1:
The patent implements dynamic adaptability by allowing each logical presentation cell to independently adjust its media representation. The media presentation description file enables dynamic content adjustment for each cell without affecting others, providing flexibility while maintaining the mosaic service function.
Solution Approach 2:
Each logical presentation cell has its own media representation and can be adjusted independently with different quality parameters. This local quality approach allows flexible content adjustment for specific cells while maintaining the overall mosaic service functionality.
3Ease of manufacture
If the mosaic server performs data composition, then the mosaic service is delivered, but the efficiency of media delivery is reduced
Solution Approach 1:
The patent uses preliminary action by pre-defining the media presentation description file with logical presentation cell information before media delivery. This allows the server to simply deliver media to pre-configured cells without performing complex composition operations during delivery, improving efficiency.
Solution Approach 2:
The patent extracts the media composition function from the server and assigns it to the client. The server only performs simple media delivery to logical presentation cells, while the client extracts and assembles the media into the final mosaic presentation, improving server productivity.
Data Source
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AI summary
A mosaic service presentation method is disclosed, including: receiving a media presentation description file that describes a mosaic service, where the media presentation description file describes presentation locations of logical presentation cells of the mosaic service and mosaic media of the logical presentation cells; obtaining the mosaic media of the logical presentation cells from an MBMS client according to a logical-presentation-cell mosaic-media description provided in the media presentation description file; and presenting the mosaic media at the presentation locations of the logical presentation cells according to a logical-presentation-cell presentation-location description provided in the media presentation description file. Therefore, flexibility of a mosaic service can be improved while an amount of computation of a mosaic service server is reduced.