Media File Track References for VVC Operating Point Signaling
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Solution Overview
Problem
The increasing demand for high-resolution, high-quality video and immersive media formats such as 4K, 8K, VR, and AR content necessitates a more efficient compression technique to reduce transmission and storage costs.
Innovation Solution
A method and apparatus for generating and processing media files that differentiate track references for operating point entity and information sample groups, utilizing versatile video coding (VVC) bitstreams, to enhance coding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high resolution, high quality video/image data are transmitted or stored using conventional methods, then image quality is maintained, but transmission and storage costs are readily increased
Solution Approach 1:
The patent applies parameter changes by differentiating track references (first track reference vs. second track reference) based on operating point information. This allows the system to switch between different coding configurations (e.g., different resolutions, bitrates, or quality settings) without re-encoding the entire video stream, thereby reducing transmission and storage costs while maintaining the required image quality for each operating point
2Adaptability or versatility
If conventional video coding methods are used for immersive media and high resolution content, then compatibility is maintained, but coding efficiency is insufficient
Solution Approach 1:
The patent implements universality by creating a media file structure that can accommodate multiple operating points with different coding configurations within a single file. The differentiated track references enable the system to serve multiple purposes (different resolutions, quality levels, or immersive formats) while maintaining compatibility with existing video players and coding standards, thereby improving coding efficiency without sacrificing versatility
3Device complexity
If multiple operating points are included in a media file without differentiating track references, then file structure simplicity is maintained, but complexity in file transport increases
Solution Approach 1:
The patent applies segmentation by dividing the media file into distinct tracks with differentiated references for different operating points. Each track or track group is associated with specific operating point information, allowing the file to be segmented in a way that simplifies transport and selection. The first and second track references create clear demarcations that make it easier to manage and transmit different operating point configurations
Data Source
AI summary
A media file generation method according to the present document comprises the steps of configuring at least one of an entity group and a sample group, generating a track, and generating the media file including the track and at least one of the entity group and the sample group, wherein: the entity group includes an operation point entity group; the sample group includes an operation point information sample group; on the basis of the track including no VVC bitstream, the track has one of a first track reference for the operation point entity group and a second track reference for a specific track including the operation point information sample group; and the first track reference is different from the second track reference.