360-Degree Video Transmission via Spherical Coordinate Metadata
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Solution Overview
Problem
Current VR systems face challenges in providing high-quality, efficient transmission and reception of 360-degree video data, particularly in terms of picture quality and spatial sound, which limits the interactive and immersive experience for users.
Innovation Solution
A method and apparatus for processing and transmitting 360-degree video data that involves capturing, stitching, projecting, encoding, and transmitting 2D-based pictures along with metadata, including information about the center point's spherical coordinates, to enhance transmission efficiency and support next-generation hybrid broadcast networks and Internet-based delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If 360-degree video data is transmitted with high picture quality and spatial sound, then the immersive experience is improved, but the transmission bandwidth and data volume increase significantly
Solution Approach 1:
The patent segments the 360-degree video data transmission by separating picture data from metadata (including spatial sound information and center point coordinates). This allows selective transmission and processing of different data components, optimizing bandwidth usage while maintaining quality where needed.
Solution Approach 2:
The patent transforms 360-degree spherical video data into 2D-based picture representation with associated metadata. This dimensional transformation enables efficient compression and transmission while preserving the ability to reconstruct the immersive 360-degree experience at the receiving end.
2Ease of operation
If 360-degree video data is processed and transmitted in real-time, then the interactive experience is improved, but the processing time and computational resources increase
Solution Approach 1:
The patent performs preliminary processing of 360-degree video data by generating metadata (including center point coordinates and spatial sound information) in advance during encoding. This pre-processing enables faster real-time transmission and playback without compromising interactive experience.
3Measurement precision
If metadata including center point spherical coordinates is transmitted, then the accuracy of VR content rendering is improved, but the signaling overhead increases
Solution Approach 1:
The patent transmits metadata with specific focus on critical rendering information such as center point spherical coordinates (yaw and pitch values). By providing precise metadata only where needed for accurate VR rendering rather than complete scene data, the system achieves high rendering accuracy with minimized signaling overhead.
Data Source
AI summary
A 360-degree video data processing method performed by an apparatus for transmitting a 360-degree video according to the present invention comprises the steps of: obtaining 360-degree video data captured by at least one camera; obtaining a 2D-based picture by processing the 360-degree video data; generating metadata associated with the 360-degree video data; encoding the picture; and performing processing for storing or transmitting the encoded picture and the metadata, wherein the metadata includes information on the central point of the picture, and the information on the central point of the picture indicates whether spherical coordinates in a spherical plane corresponding to the central point of the picture have a yaw value of 0 and a pitch value of 0, respectively.