Stereoscopic Metadata Structure for Reducing Data Redundancy
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Solution Overview
Problem
Existing technologies lack a standardized method for identifying and storing stereoscopic content when 2D and 3D content are combined, and for providing stereoscopic camera and display information when 3D content has different camera and display parameters, leading to redundancy and inefficiency in data storage and reproduction.
Innovation Solution
A metadata structure, including an initial stereoscopic header (ishd) and track reference information, is introduced to support various stereoscopic image configurations and camera parameters, allowing for efficient identification and storage of stereoscopic content, even when multiple formats are used, by including essential information in a single header and eliminating redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate header information is stored for each stereoscopic content format, then complete stereoscopic information is preserved, but data redundancy increases and storage efficiency decreases
Solution Approach 1:
The patent merges separate header information from multiple stereoscopic content formats into a single unified initial stereoscopic header (ishd). This header contains common parameters such as stereoscopic composition type, camera parameters, and display information that apply to all contained stereoscopic streams, thereby eliminating redundancy while preserving complete stereoscopic information.
Solution Approach 2:
The initial stereoscopic header (ishd) serves as a universal header that can accommodate multiple stereoscopic content formats with different camera and display parameters. It provides a standardized structure that universally describes stereoscopic content properties across various formats, enabling efficient storage and reproduction without requiring separate headers for each format.
2Productivity
If standardized metadata structure is implemented for mixed 2D and 3D content, then content identification efficiency improves, but system complexity increases
Solution Approach 1:
The metadata structure is segmented into distinct functional components: the initial stereoscopic header (ishd) for common parameters, individual stereoscopic headers for format-specific parameters, and track reference information for organizing multiple streams. This segmentation allows efficient content identification through a clear hierarchical structure while managing complexity through modular organization.
Solution Approach 2:
The initial stereoscopic header (ishd) is placed at the beginning of the file to provide preliminary information about the stereoscopic content formats and parameters before the actual content data. This allows systems to quickly identify and configure for stereoscopic content without parsing through entire files, improving identification efficiency while maintaining a manageable structure.
3Adaptability or versatility
If multiple stereoscopic formats with different camera parameters are supported, then versatility improves, but data storage efficiency decreases
Solution Approach 1:
The patent applies local quality by storing common stereoscopic parameters (composition type, baseline, focal length) centrally in the initial header where they apply to all content, while storing format-specific parameters (display information, convergence distance) only where needed in individual stereoscopic headers or track references. This selective storage approach supports multiple formats efficiently by avoiding redundant storage of identical parameters.
Data Source
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AI summary
Provided is a metadata structure for storing and reproducing stereoscopic data and a method for storing a stereoscopic content file based on the metadata structure. The stereoscopic content file storing method includes storing streams of the stereoscopic contents; and, when the stereoscopic content has more than two elementary streams, storing information for dividing the elementary streams into a main track and a supplementary track.