Media Track Signaling for Bandwidth-Efficient Combination Decoding
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Solution Overview
Problem
Existing immersive media transmission solutions waste bandwidth due to the need for media frames of all temporal levels and qualities to be requested before combination decoding, which is constrained at the file transmission level.
Innovation Solution
The solution involves encapsulating media frames of the same quality into separate tracks and adding combination indication information to the signaling description file, allowing the content playback device to request and decode only the necessary media files based on this information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If media frames of all temporal levels and all quality are requested before combination decoding, then combination decoding can be performed, but bandwidth is wasted
Solution Approach 1:
The signaling description file is prepared in advance with combination indication information that identifies which media files can be combined for decoding. This preliminary organization allows the playback device to directly select appropriate media files without requesting all available media frames, thereby enabling combination decoding while avoiding bandwidth waste from unnecessary transmissions.
2Productivity
If media frames of all temporal levels and all quality are requested, then decoding can proceed, but network usage increases
Solution Approach 1:
The combination indication information is extracted and embedded in the signaling description file to identify specifically which media files are suitable for combination decoding. This extraction mechanism allows the playback device to request only the necessary media files rather than all available media frames, maintaining decoding productivity while reducing network usage by eliminating unnecessary data requests.
3Reliability
If constraint is applied at file transmission level, then combination decoding is enabled, but device complexity increases
Solution Approach 1:
The signaling description file with combination indication information acts as an intermediary that carries decoding constraints from the encoding side to the playback side. This intermediary mechanism enables combination decoding support without requiring complex processing logic in the playback device, as the constraints are pre-established and communicated through the signaling file rather than requiring real-time analysis of all media frames.
Data Source
AI summary
In a method for processing media data, signaling description information of the media data is received. The media data includes N media frames of a plurality of qualities that are encapsulated into M tracks to obtain a media file corresponding to each of the M tracks. The media frames encapsulated into a same track of the M tracks have a same quality of the plurality of qualities. The signaling description information includes combination indication information that indicates the media files allowed for combination decoding in the M media files. At least two media files are obtained according to the combination indication information. The media files correspond to at least two tracks in the M tracks having the same quality. The combination decoding is performed on the obtained at least two media files.