VR Device Tile-Based 360-Degree Video Transmission
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Solution Overview
Problem
Current VR systems face challenges in efficiently processing and transmitting 360-degree images, leading to high memory and bandwidth requirements, video disconnection issues, and delayed responses to viewer movements.
Innovation Solution
A VR device and control method that utilize a hybrid broadcasting system combining terrestrial networks and Internet networks to efficiently transmit 360-degree content, incorporating signaling methods to reflect producer intentions and enhance transmission capacity, while allowing for immediate viewer interactions without video disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional VR systems process and transmit 360-degree images, then complete visual coverage is achieved, but memory and bandwidth requirements become excessively high
Solution Approach 1:
The 360-degree video content is divided into multiple tiles, where only the tiles corresponding to the viewer's current field of view are transmitted and processed. This segmentation approach maintains complete visual coverage when needed while significantly reducing memory and bandwidth requirements by avoiding transmission of unused portions of the 360-degree content.
2Manufacturing precision
If VR systems process high-resolution 360-degree images, then image quality is improved, but processing time increases
Solution Approach 1:
The system performs preliminary processing by pre-dividing the 360-degree video into tiles and pre-identifying which tiles are relevant to the viewer's field of view based on head orientation data. This preliminary action allows the system to prepare only the necessary high-resolution image portions in advance, maintaining image quality while reducing actual processing time during playback.
3Loss of information
If VR systems transmit complete 360-degree video data, then content completeness is ensured, but transmission bandwidth becomes excessively high
Solution Approach 1:
The system applies local quality by transmitting high-resolution video data only for the specific region corresponding to the viewer's current field of view, while using lower resolution or omitting transmission for other regions. This approach ensures content completeness for the viewed area while significantly reducing overall transmission bandwidth requirements.
4Measurement precision
If VR systems process thumbnails from entire 360-degree images, then navigation accuracy is improved, but computational resources increase
Solution Approach 1:
The system extracts only the necessary portion for thumbnail generation by identifying and processing only the tile corresponding to the viewer's current field of view, rather than processing the entire 360-degree image. This extraction approach maintains navigation accuracy for the relevant area while significantly reducing computational resource requirements.
Data Source
AI summary
A control method for a VR device is disclosed, which comprises the steps of receiving 360-degree video bitstreams, extracting sub-bitstreams included in the 360-degree video bitstreams, the sub-bitstreams including a Region of Interest (ROI) for the 360-degree video bitstreams, generating restoration data for the ROI from sub-bitstreams, and generating thumbnail data by remapping the restoration data for the ROI based on signaling information.