Wireless Image Metadata Signaling for 360-Degree Video Stitching

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Current wireless communication systems lack an efficient method for transmitting and receiving metadata about images, particularly for stitching and processing 360-degree videos, which hinders the seamless delivery of high-quality VR content.

Innovation Solution

A method and apparatus for acquiring and transmitting metadata about image stitching in a wireless communication system, enabling efficient signaling of image information between terminals and networks, including the generation and processing of metadata for 360-degree video stitching, packing, and synchronization functions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If multiple image streams are transmitted separately for 360-degree video stitching, then image quality and stitching accuracy are improved, but transmission bandwidth consumption and system complexity increase

Engineering Contradiction:
Improvestitching accuracyVSAvoidtransmission bandwidth
Core Design Contradiction:
Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent combines multiple image streams into a single transmitted stream by embedding metadata about multiple images within one image data structure. This allows the receiver to extract and process multiple images without requiring separate transmission channels for each image, thereby reducing bandwidth consumption while maintaining the ability to perform accurate stitching operations.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The transmitted image stream is designed to serve multiple functions simultaneously: it carries the actual image data for display, embedded metadata for stitching operations, and information about additional images that can be extracted and processed separately. This multi-functional design eliminates the need for separate dedicated streams for each purpose.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Measurement precision

If comprehensive metadata about image stitching is transmitted, then processing accuracy and VR content quality are improved, but data transmission volume and processing complexity increase

Engineering Contradiction:
Improveprocessing accuracyVSAvoidmetadata processing complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The metadata is segmented into distinct functional components including stitching parameters, image acquisition information, and processing instructions. This segmentation allows the receiving device to parse and process only the specific metadata elements relevant to its capabilities, reducing overall processing complexity while maintaining high processing accuracy for each individual function.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The metadata is prepared and organized in advance during the image capture and preprocessing stage, with all necessary stitching information and image characteristics pre-calculated and embedded. This preliminary preparation reduces the computational burden on the receiving device, as the complex analysis and organization of metadata has already been performed by the transmitting device.

Inventive Principle:
Principle #10Preliminary action

3Productivity

If stitching is performed at the network side rather than terminal side, then processing efficiency is improved, but network infrastructure complexity and latency increase

Engineering Contradiction:
Improveprocessing efficiencyVSAvoidnetwork latency
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The network side performs stitching operations in advance and stores the stitched results, so that when a user requests content, the pre-stitched images are immediately available for transmission. This eliminates real-time stitching latency during content delivery, though it does require upfront processing time and network infrastructure capability.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS11303826B2Method and device for transmitting/receiving metadata of image in wireless communication system
Publication Date: 2022.04.12 LG ELECTRONICS INC
  • US11303826B2 patent drawing
  • US11303826B2 patent drawing
  • US11303826B2 patent drawing

AI summary

A communication method for an image transmission device in a wireless communication system, in accordance with the present invention, comprises the steps of: acquiring information on at least one image for which stitching is to be performed; generating metadata for the stitching, on the basis of the information on the at least one image; and transmitting the metadata for the stitching to an image reception device.