Panoramic Video Transmission via Dynamic FOV Segmentation

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Solution Overview

Problem

Current VR panoramic video transmission methods face challenges in bandwidth efficiency and storage requirements, with full-view transmission wasting network resources and FOV transmission compromising image quality due to increased storage needs.

Innovation Solution

A method and device for transmitting panoramic videos that dynamically request either a second panoramic video file or an auxiliary FOV video file based on the viewing angle variance, utilizing a media presentation description to manage video files with predetermined primary and auxiliary FOVs, optimizing bandwidth usage and image quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If full-view transmission scheme is used, then image quality is maintained, but bandwidth consumption increases significantly

Engineering Contradiction:

Improveimage qualityVSAvoidbandwidth consumption

Core Design Contradiction:

Manufacturing precisionVSQuantity of substance

Solution Approach 1:

The patent segments the 360-degree panoramic video into multiple viewing angle segments (e.g., 30 viewing angles). Instead of transmitting the entire panoramic video, only the segment corresponding to the user's current field of view is transmitted, reducing bandwidth consumption while maintaining image quality in the visible region.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different transmission strategies to different regions of the panoramic video. The central field of view region is transmitted with high resolution, while peripheral regions are either transmitted with lower resolution or not transmitted at all, optimizing the balance between image quality and bandwidth usage.

Inventive Principle:

Principle #3Local quality

2Quantity of substance

If FOV transmission scheme is used, then bandwidth consumption is reduced, but storage requirements increase

Engineering Contradiction:

Improvebandwidth consumptionVSAvoidstorage requirements

Core Design Contradiction:

Quantity of substanceVSVolume of stationary object

Solution Approach 1:

The patent pre-divides the panoramic video into multiple viewing angle segments during the encoding phase. This preliminary segmentation allows the system to transmit only the necessary segments without needing to store multiple complete panoramic videos, reducing storage requirements while enabling efficient bandwidth usage.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If FOV transmission scheme with multiple viewing angles is used, then bandwidth utilization improves, but video file size increases

Engineering Contradiction:

Improvebandwidth utilizationVSAvoidvideo file size

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent transmits only the partial content necessary for the user's current viewing experience (the FOV segment) rather than the excessive full panoramic content. This approach achieves sufficient video quality for the user's needs while minimizing the transmitted data volume, improving bandwidth utilization efficiency.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20240214540A1Method for transmitting panoramic videos, terminal and server

Publication Date: 2024.06.27 ZTE CORP

AI summary

Disclosed are a method and device for transmitting a panoramic video. The method includes: requesting a server for acquiring a first panoramic video file; and upon detecting a change in a viewing angle of a user, according to an FOV type of the first panoramic video file, requesting the server for acquiring a second panoramic video file or an auxiliary FOV video file of the first panoramic video file.